scp-fs2open/fs2open.github.com
1
0 Fork 0
mirror of https://github.com/scp-fs2open/fs2open.github.com.git synced 2026-11-09 04:49:39 -10:00
Code Issues Packages Projects Releases 1 Wiki Activity
Files
26dc0eb8f12736cd4c203ff3dfdab2b83ca94ea4
fs2open.github.com/code/object/collideshipship.cpp
T

1974 lines
72 KiB
C++
Raw Blame History

/*
* Copyright (C) Volition, Inc. 1999. All rights reserved.
*
* All source code herein is the property of Volition, Inc. You may not sell
* or otherwise commercially exploit the source or things you created based on the
* source.
*
*/
/*
* $Logfile: /Freespace2/code/Object/CollideShipShip.cpp $
* $Revision: 2.16 $
* $Date: 2005-10-09 09:13:29 $
* $Author: wmcoolmon $
*
* Routines to detect collisions and do physics, damage, etc for ships and ships
*
* $Log: not supported by cvs2svn $
* Revision 2.15 2005/09/25 08:25:14 Goober5000
* Okay, everything should now work again. :p Still have to do a little more with the asteroids.
* --Goober5000
*
* Revision 2.14 2005/07/12 21:10:57 Goober5000
* fixed "warpout sequence aborted" bug
* --Goober5000
*
* Revision 2.13 2005/04/05 05:53:21 taylor
* s/vector/vec3d/g, better support for different compilers (Jens Granseuer)
*
* Revision 2.12 2005/03/27 12:28:32 Goober5000
* clarified max hull/shield strength names and added ship guardian thresholds
* --Goober5000
*
* Revision 2.11 2005/03/10 08:00:11 taylor
* change min/max to MIN/MAX to fix GCC problems
* add lab stuff to Makefile
* build unbreakage for everything that's not MSVC++ 6
* lots of warning fixes
* fix OpenGL rendering problem with ship insignias
* no Warnings() in non-debug mode for Linux (like Windows)
* some campaign savefile fixage to stop reverting everyones data
*
* Revision 2.10 2005/01/26 05:42:37 Goober5000
* fixed a nitpicky thing
* --Goober5000
*
* Revision 2.9 2005/01/11 21:38:49 Goober5000
* multiple ship docking :)
* don't tell anyone yet... check the SCP internal
* --Goober500
*
* Revision 2.8 2004/07/26 20:47:45 Kazan
* remove MCD complete
*
* Revision 2.7 2004/07/12 16:32:59 Kazan
* MCD - define _MCD_CHECK to use memory tracking
*
* Revision 2.6 2004/03/05 09:01:57 Goober5000
* Uber pass at reducing #includes
* --Goober5000
*
* Revision 2.5 2003/04/29 01:03:22 Goober5000
* implemented the custom hitpoints mod
* --Goober5000
*
* Revision 2.4 2003/01/24 03:48:11 Goober5000
* aw, nuts - fixed a dumb bug with my new don't-collide-invisible code :p
* --Goober5000
*
* Revision 2.3 2003/01/18 09:25:42 Goober5000
* fixed bug I inadvertently introduced by modifying SIF_ flags with sexps rather
* than SF_ flags
* --Goober5000
*
* Revision 2.2 2002/08/01 01:41:08 penguin
* The big include file move
*
* Revision 2.1 2002/07/26 16:17:46 penguin
* renamed 'big' and 'small' (conflict w/ MS include file)
*
* Revision 2.0 2002/06/03 04:02:27 penguin
* Warpcore CVS sync
*
* Revision 1.2 2002/05/04 04:52:22 mharris
* 1st draft at porting
*
* Revision 1.1 2002/05/02 18:03:11 mharris
* Initial checkin - converted filenames and includes to lower case
*
*
* 31 9/01/99 5:40p Andsager
* Collision resolution between small and CAP during warp
*
* 30 8/24/99 8:55p Dave
* Make sure nondimming pixels work properly in tech menu.
*
* 29 7/29/99 12:11a Andsager
* comment fix
*
* 28 7/28/99 11:23p Andsager
* Try a different strategy to resolve collisions between ships on same
* team.
*
* 27 7/24/99 1:54p Dave
* Hud text flash gauge. Reworked dead popup to use 4 buttons in red-alert
* missions.
*
* 26 7/15/99 5:41p Andsager
* Clean up demo build
*
* 25 7/15/99 9:20a Andsager
* FS2_DEMO initial checkin
*
* 24 7/12/99 11:49a Andsager
* Really fix collision warp-in bug.
*
* 23 7/09/99 5:54p Dave
* Seperated cruiser types into individual types. Added tons of new
* briefing icons. Campaign screen.
*
* 22 7/08/99 5:49p Andsager
* Fixed bug colliding with just warped in Cap ship
*
* 21 6/14/99 3:21p Andsager
* Allow collisions between ship and its debris. Fix up collision pairs
* when large ship is warping out.
*
* 20 4/23/99 12:01p Johnson
* Added SIF_HUGE_SHIP
*
* 19 4/20/99 3:45p Andsager
* Modify ship_apply_local_damage to take a collision normal
*
* 18 4/19/99 12:21p Johnson
* Allow ships with invisible polygons which do not collide
*
* 17 3/20/99 2:54p Andsager
* Fix collision for cap ships warping in - speed is much greater than
* expected.
*
* 16 2/05/99 11:07a Andsager
* Make cap ships not get shoved around with asteroid collisions
*
* 15 2/02/99 1:18p Andsager
* Modify asteroid/cruiser collisions so cruisers don't get bashed so
* much.
*
* 14 1/12/99 5:45p Dave
* Moved weapon pipeline in multiplayer to almost exclusively client side.
* Very good results. Bandwidth goes down, playability goes up for crappy
* connections. Fixed object update problem for ship subsystems.
*
* 13 1/11/99 12:42p Andsager
* Add live debris - debris which is created from a destroyed subsystem,
* when the ship is still alive
*
* 12 12/03/98 3:14p Andsager
* Check in code that checks rotating submodel actually has ship subsystem
*
* 11 11/20/98 2:22p Andsager
* Change collision separation h2l_vec
*
* 10 11/19/98 11:47p Andsager
* Fix possible divide by zero bug.
*
* 9 11/19/98 11:08p Andsager
* Check in of physics and collision detection of rotating submodels
*
* 8 11/13/98 5:06p Johnson
* Fix Kulas collision bug
*
* 7 11/05/98 5:55p Dave
* Big pass at reducing #includes
*
* 6 10/23/98 1:11p Andsager
* Make ship sparks emit correctly from rotating structures.
*
* 5 10/20/98 1:39p Andsager
* Make so sparks follow animated ship submodels. Modify
* ship_weapon_do_hit_stuff() and ship_apply_local_damage() to add
* submodel_num. Add submodel_num to multiplayer hit packet.
*
* 4 10/16/98 1:22p Andsager
* clean up header files
*
* 3 10/13/98 9:29a Dave
* Started neatening up freespace.h. Many variables renamed and
* reorganized. Added AlphaColors.[h,cpp]
*
* 2 10/07/98 10:53a Dave
* Initial checkin.
*
* 1 10/07/98 10:50a Dave
*
* 105 6/09/98 10:31a Hoffoss
* Created index numbers for all xstr() references. Any new xstr() stuff
* added from here on out should be added to the end if the list. The
* current list count can be found in FreeSpace.cpp (search for
* XSTR_SIZE).
*
* 104 5/24/98 11:36p Mike
* Comment out no-optimize pragmas.
*
* 103 5/24/98 10:50p Mike
* Fix problem with ships with propagating explosions not being able to
* kamikaze.
*
* 102 5/21/98 3:48p Lawrance
* prevent player from entering friendly ship docking bays
*
* 101 5/19/98 2:19p Mike
* Don't do collision detection between small ship emerging or departing
* and its parent.
*
* 100 5/18/98 4:53p Hoffoss
* Some force feedback tweaks and pilot initializations there should have
* been happening, but weren't, and not are!
*
* 99 5/13/98 11:34p Mike
* Model caching system.
*
* 98 5/10/98 11:11p Lawrance
* Allow ships to collide if in second stage of arrival
*
* 97 5/08/98 5:25p Lawrance
* Don't allow collision sounds too play over each so much
*
* 96 5/08/98 3:51p Allender
* temporary fix for support ships on clients in multiplayer
*
* 95 5/08/98 11:22a Allender
* fix ingame join trouble. Small messaging fix. Enable collisions for
* friendlies again
*
* 94 5/07/98 12:24a Hoffoss
* Finished up sidewinder force feedback support.
*
* 93 5/03/98 5:40p Mike
* Debug info for trapping player collisions.
*
* 92 4/28/98 2:28p Allender
* temporarily put back in collision out for multiplayers for ships on the
* same team since that broke rearm/repair
*
* 91 4/28/98 1:00a Andsager
* Add collision sanity check
*
* 90 4/28/98 12:23a Chad
* removed call which prevented same team coliisions from happening in
* multiplayer
*
* 89 4/24/98 5:35p Andsager
* Fix sparks sometimes drawing not on model. If ship is sphere in
* collision, don't draw sparks. Modify ship_apply_local_damage() to take
* parameter no_spark.
*
* 88 4/23/98 4:42p Mike
* Support invisible polygons that only enemy ships bump into.
*
* 87 4/20/98 12:36a Mike
* Make team vs. team work when player is hostile. Several targeting
* problems.
*
* 86 4/12/98 2:02p Mike
* Make small ships avoid big ships.
* Turn on Collide_friendly flag.
*
* 85 4/08/98 4:01p Andsager
* Removed assert in calculate_ship_ship_collisions_physics()
*
* 84 4/06/98 1:39a Mike
* NDEBUG out some debugt code.
* Make ships find a new target if their target is on the same team.
*
* 83 3/31/98 5:18p John
* Removed demo/save/restore. Made NDEBUG defined compile. Removed a
* bunch of debug stuff out of player file. Made model code be able to
* unload models and malloc out only however many models are needed.
*
*
* 82 3/25/98 2:43p Andsager
* comment out asserts
*
* 81 3/25/98 1:19p Mike
* Comment out unimportant assert.
*
* 80 3/25/98 10:43a Andsager
* Hack for ship_asteroid collisions when erroneous relative_vel >150
*
* 79 3/25/98 12:05a Mike
* Comment out line to make sm1-06a playable. Reported to DaveA.
*
* 78 3/23/98 9:20a Andsager
* Remove all velocity updates in object code.
*
* 77 3/17/98 12:49a Mike
* Improved kamikaze behavior.
*
* 76 3/16/98 12:02a Mike
* Add support for kamikaze mode. Add AIF_NO_DYNAMIC which means
* relentlessly pursue current goal.
*
* 75 3/13/98 12:57p Mike
* Remove an Assert that was easy to trip with time compressed 8x.
*
* 74 3/09/98 12:58a Andsager
* Don't check asteroids very large displacements in collisions, since
* they may wrap.
*
* 73 3/09/98 12:16a Andsager
*
* 72 2/22/98 2:48p John
* More String Externalization Classification
*
* 71 2/20/98 8:32p Lawrance
* Add radius parm to sound_play_3d()
*
* 70 2/12/98 2:16p Andsager
* Better ship:ship collision pair next check time estimate
*
* 69 2/09/98 1:45p Andsager
* Fix bug in finding earliest possilble ship:ship collision. Used
* max_vel, not afterburner_max_vel.
*
* 68 2/05/98 12:51a Mike
* Early asteroid stuff.
*
* 67 2/04/98 6:08p Lawrance
* Add a light collision sound, overlay a shield collide sound if
* applicable.
*
* 66 2/02/98 4:36p Mike
* Prevent damage from occurring between two ships during very last frame
* of warpout if docked and on opposite sides.
*
* 65 1/28/98 2:15p Mike
* Make collision damage affect shield, not just hull.
*
* 64 1/28/98 11:06a Andsager
* Remove some collision pairs. Add debug code for displaying collision
* pair info.
*
* 63 1/23/98 5:08p Andsager
* Collision from rotation is turned on for all ship:ship colliisons.
*
* 62 1/20/98 9:47a Mike
* Suppress optimized compiler warnings.
* Some secondary weapon work.
*
* 61 1/19/98 11:56a Sandeep
* DA: remove warning in calculate ship_ship_physics from ship_debris
* collision when debris is spawned next to chasing ship.
*
* 60 1/14/98 2:30p Andsager
* Change warning for bad relative velocity
*
* 59 1/12/98 9:26p Andsager
* Implement collisions from rotation.
*
* 58 1/09/98 9:29a Mike
* Enable docked ships to warp out. Make damage done to a ship not
* proportional to its own mass.
*
* 57 1/08/98 12:12a Mike
* Make ships turn before warping out, if necessary, to avoid a collision.
* Warn player if his warpout will collide. Abort if in stage1.
*
* 56 1/05/98 9:08p Andsager
* Changed ship_shipor_debris_hit_info struct to more meaninful names.
* Begin implementation of collision from rotation.
*
* 55 1/02/98 9:08a Andsager
* Changed ship:ship and ship:debris collision detection to ignore shields
* and collide only against hull. Also, significantly reduced radius of
* sphere.
*
* 54 12/23/97 5:34p Andsager
* Fixed bug colliding against edge of ships without shields.
*
* 53 12/22/97 9:56p Andsager
* Implement ship:debris collisions. Generalize and move
* ship_ship_or_debris_hit struct from CollideShipShip to ObjCollide.h
*
* 52 12/17/97 9:39p Lawrance
* Always play collide sound when player collides with another ship.
*
* 51 12/17/97 3:55p Andsager
* Added separation velocity in ship:ship collision when both ships on
* same team.
*
* 50 12/16/97 5:24p Andsager
* Modify collision detection criterion. Somewhat of a hack, but it keeps
* ships from getting stuci on each other. Comment out debug info.
*
* 49 12/08/97 6:23p Lawrance
* fix collision sounds (broken since hit pos was changed to local coords)
*
* 48 12/04/97 5:34p Lawrance
* let player collide with friendly ships (no damage though) by default
*
* 47 12/04/97 4:05p Allender
* comment out hud printf for ship ship collisions
*
* 46 12/03/97 5:44p Andsager
* Implement relative velocity collisions in the reference frame of the
* heavier object.
*
* 45 12/03/97 12:04p Hoffoss
* Made changes so the 8 %'s aren't needed anymore. Can just use 2 again
* now.
*
* 44 12/03/97 11:35a Hoffoss
* Made changes to HUD messages send throughout the game.
*
* 43 11/28/97 3:51p Mike
* Get blasted % symbol to display through HUD_printf. Had to enter
* %%%%%%%% (yes, that's 8x %)
*
* 42 11/26/97 3:25p Mike
* Decrease large quantities of damage. If > 5.0f, cut out half of amount
* over 5.0f.
*
* 41 11/16/97 8:45p Mike
* Add SM_ATTACK_FOREVER submode (of AIM_CHASE) and ships better dealing
* with their engines being blown out.
*
* 40 11/14/97 9:27a Andsager
* Changed debug print statements
*
* 39 11/13/97 6:12p Lawrance
* uncomment code that was commented out for build reasons
*
* 38 11/13/97 6:11p Lawrance
* call hud_start_collision_flash() when player ship hits another ship
*
* 37 11/13/97 4:59p Mike
* Add new chase submode: SM_FLY_AWAY. Deals with a ship colliding with
* its target. Ships were getting hung up on each other because the avoid
* code was used to deal with collisions. It was very bad.
*
* 36 11/12/97 11:53p Mike
* Fix code that shows damage taken due to collision to only work for
* player.
*
* 35 11/12/97 12:14p Mike
* Cut ship:ship collision damage by half again and put in a HUD message
* for large damage.
*
* 34 11/12/97 10:03a Mike
* Cut damage done due to ship:ship collisions by half.
*
* 33 11/10/97 10:50p Mike
* Fix bug preventing ships in sm1-03a from warping out together as a
* docked pair. Only worked for support ships and cargo, not a pair of
* transports.
*
* 32 11/09/97 11:24p Andsager
* Set small bounce in ship-ship collision. coeffic restitution 0.2
*
* 31 11/09/97 4:39p Lawrance
* make 'Collide_friendly' make friendly collisions behave the same way as
* hostile collisions
*
* 30 11/07/97 4:36p Mike
* Change how ships determine they're under attack by dumbfire weapons.
*
* 29 11/06/97 12:27a Mike
* Better avoid behavior.
* Modify ai_turn_towards_vector() to take a flag parameter.
*
* 28 11/05/97 10:32p Mike
* Convert Assert() to nprintf when point of collisions is farther apart
* than sum of object radii.
*
* 27 11/05/97 9:28p Mike
* Add ships_are_docking() to allow ships of different teams to dock.
*
* 26 11/05/97 5:50p Andsager
* Added hit_time to ship_ship_hit_info to prevent hit_time from getting
* overwritten.
*
* 25 11/03/97 11:21p Andsager
* Fixed bug getting shield quad. Reduced damage in ship-ship. Collision
* normal from sphere center to hit_pos
*
* 24 11/03/97 11:08p Lawrance
* play correct collision sounds.
*
* 23 11/03/97 2:07p Lawrance
* add ship-to-ship collision sound
*
* 22 11/02/97 10:54p Lawrance
* add Collide_friendly, which is changed through debug console to
* enable/disable friend-friend collisions
*
* 21 11/01/97 3:58p Mike
* Zero damage caused by ship:ship collisions until it gets balanced.
*
* 20 10/29/97 5:19p Dave
* More debugging of server transfer. Put in debrief/brief
* transition for multiplayer (w/standalone)
*
* 19 10/29/97 4:56p Andsager
* Fixed bugs in collision physics involving normals. Collided objects
* now back up in the direction they came in.
*
* 18 10/28/97 4:57p John
* Put Andsager's new sphereline collide code officially into the code
* base and did a little restructuring. Fixed a few little bugs with it
* and added some simple bounding box elimination and did some timings.
*
*
* 17 10/27/97 6:12p Dave
* Changed host/server transfer around. Added some multiplayer data to
* state save/restore. Made multiplayer quitting more intelligent.
*
* 16 10/27/97 8:35a John
* code for new player warpout sequence
*
* 15 10/25/97 10:12a Andsager
* Cleaned up ship_ship_check_collision. Moved SHIP_SPHERE_CHECK to
* objCollide.h. Added some debug code for shield/hull collisions
*
* 14 10/22/97 10:29p Andsager
* modify ship_ship_check_collision to allow sphere-polygon collisions
*
* 13 10/19/97 11:45p Mike
* Hacked in damage due to gravity well of a planet.
*
* 12 10/19/97 9:41p Andsager
* undefine SPHERE_POLY_CHECK
*
* 11 10/19/97 9:34p Andsager
* Changed model_collide to take 2nd parameter radius with (default = 0)
*
* 10 10/17/97 1:32a Andsager
* add sphere-polygon collision detection
*
* 9 10/01/97 5:55p Lawrance
* change call to snd_play_3d() to allow for arbitrary listening position
*
* 8 9/30/97 5:06p Andsager
* rename vm_project_point_onto_surface() -> vm_project_name_onto_plane()
*
* 7 9/28/97 2:19p Andsager
* fixed bug in getting shield point in ray model collisions
*
* 6 9/25/97 2:54p Andsager
* added small bounce to collisions
*
* 5 9/19/97 5:00p Andsager
* modify collisions so that damage is first applied to shield and then to
* hull
*
* 4 9/18/97 4:08p John
* Cleaned up & restructured ship damage stuff.
*
* 3 9/18/97 3:58p Andsager
* fix bugs in sphere_sphere collision (sets r and hit_pos)
*
* 2 9/17/97 5:12p John
* Restructured collision routines. Probably broke a lot of stuff.
*
* 1 9/17/97 2:14p John
* Initial revision
*
* $NoKeywords: $
*/
#include "object/objcollide.h"
#include "object/object.h"
#include "ship/ship.h"
#include "freespace2/freespace.h"
#include "ship/shiphit.h"
#include "gamesnd/gamesnd.h"
#include "render/3d.h" // needed for View_position, which is used when playing 3d sound
#include "gamesequence/gamesequence.h"
#include "hud/hudshield.h"
#include "hud/hudmessage.h"
#include "io/joy_ff.h"
#include "io/timer.h"
#include "asteroid/asteroid.h"
#include "playerman/player.h"
#include "object/objectdock.h"
//#pragma optimize("", off)
//#pragma auto_inline(off)
#define COLLISION_FRICTION_FACTOR 0.0
#define COLLISION_ROTATION_FACTOR 0.2
#define SEP_VEL 5.0f // separation velocity between two ships that collide on same team.
#define COLLIDE_DEBUG
#undef COLLIDE_DEBUG
// GENERAL COLLISIONS FUNCTIONS
// calculates the inverse moment of inertia matrix in world coordinates
void get_I_inv (matrix* I_inv, matrix* I_inv_body, matrix* orient);
// calculate the physics of extended two body collisions
void calculate_ship_ship_collision_physics(collision_info_struct *ship_ship_hit_info);
int ship_hit_shield(object *obj, mc_info *mc, collision_info_struct *sshs);
void collect_ship_ship_physics_info(object *heavy, object *light, mc_info *mc_info, collision_info_struct *ship_ship_hit_info);
#ifndef NDEBUG
static int Collide_friendly = 1;
DCF_BOOL( collide_friendly, Collide_friendly )
#endif
static int Player_collide_sound, AI_collide_sound;
static int Player_collide_shield_sound, AI_collide_shield_sound;
// Return true if two ships are docking.
int ships_are_docking(object *objp1, object *objp2)
{
ai_info *aip1, *aip2;
ship *shipp1, *shipp2;
shipp1 = &Ships[objp1->instance];
shipp2 = &Ships[objp2->instance];
aip1 = &Ai_info[shipp1->ai_index];
aip2 = &Ai_info[shipp2->ai_index];
// for multiplayer clients -- disable the collision stuff for support ships.
/*
if ( MULTIPLAYER_CLIENT ) {
if ( (Ship_info[shipp1->ship_info_index].flags & SIF_SUPPORT) || (Ship_info[shipp2->ship_info_index].flags & SIF_SUPPORT) ) {
return 1;
}
}
*/
if (dock_check_find_direct_docked_object(objp1, objp2)) {
return 1;
}
if (aip1->mode == AIM_DOCK) {
if (aip1->goal_objnum == OBJ_INDEX(objp2)){
return 1;
}
} else if (aip2->mode == AIM_DOCK) {
if (aip2->goal_objnum == OBJ_INDEX(objp1)){
return 1;
}
}
return 0;
}
// If light_obj emerging from or departing to dock bay in heavy_obj, no collision detection.
int bay_emerge_or_depart(object *heavy_objp, object *light_objp)
{
if (light_objp->type != OBJ_SHIP)
return 0;
ai_info *aip = &Ai_info[Ships[light_objp->instance].ai_index];
if ((aip->mode == AIM_BAY_EMERGE) || (aip->mode == AIM_BAY_DEPART)) {
if (aip->goal_objnum == OBJ_INDEX(heavy_objp))
return 1;
}
return 0;
}
int ship_ship_check_collision(collision_info_struct *ship_ship_hit_info, vec3d *hitpos)
{
object *heavy_obj = ship_ship_hit_info->heavy;
object *light_obj = ship_ship_hit_info->light;
int player_involved; // flag to indicate that A or B is the Player_obj
int num; //, player_check=0;
Assert( heavy_obj->type == OBJ_SHIP );
Assert( light_obj->type == OBJ_SHIP );
num = heavy_obj->instance;
Assert( num >= 0 );
Assert( Ships[num].objnum == OBJ_INDEX(heavy_obj));
// AL 12-4-97: we use the player_involved flag to ensure collisions are always
// done with the player, regardless of team.
if ( heavy_obj == Player_obj || light_obj == Player_obj ) {
player_involved = 1;
} else {
player_involved = 0;
}
// Make ships that are warping in not get collision detection done
// if ( Ships[num].flags & SF_ARRIVING ) return 0;
if ( Ships[num].flags & SF_ARRIVING_STAGE_1 ) {
return 0;
}
// Don't do collision detection for docking ships, since they will always collide while trying to dock
if ( ships_are_docking(heavy_obj, light_obj) ) {
return 0;
}
// If light_obj emerging from or departing to dock bay in heavy_obj, no collision detection.
if (bay_emerge_or_depart(heavy_obj, light_obj)) {
return 0;
}
// Ships which are dying should not do collision detection.
// Also, this is the only clean way I could figure to get ships to not do damage to each other for one frame
// when they are docked and departing. Due to sequencing, they would not show up as docked, yet they
// would still come through here, so they would harm each other, if on opposing teams. -- MK, 2/2/98
if ((heavy_obj->flags & OF_SHOULD_BE_DEAD) || (light_obj->flags & OF_SHOULD_BE_DEAD)) {
return 0;
}
//nprintf(("AI", "Frame %i: Collision between %s and %s\n", Framecount, Ships[heavy_obj->instance].ship_name, Ships[light_obj->instance].ship_name));
#ifndef NDEBUG
// Don't do collision detection on a pair of ships on the same team.
// Change this someday, but for now, it's a problem.
if ( !Collide_friendly ) { // Collide_friendly is a global value changed via debug console
if ( (!player_involved) && (Ships[heavy_obj->instance].team == Ships[light_obj->instance].team) ) {
return 0;
}
}
#endif
// Apparently we're doing same team collisions.
// But, if both are offscreen, ignore the collision
if (Ships[heavy_obj->instance].team == Ships[light_obj->instance].team) {
// if ((Game_mode & GM_MULTIPLAYER) || (!(heavy_obj->flags & OF_WAS_RENDERED) && !(light_obj->flags & OF_WAS_RENDERED)))
// mwa 4/28/98 -- don't understand why GM_MULTIPLAYER was included in this line. All clients
// need to do all collisions for their own ship. removing the multiplayer part of next if statement.
if ( (!(heavy_obj->flags & OF_WAS_RENDERED) && !(light_obj->flags & OF_WAS_RENDERED)) ) {
return 0;
}
}
// If either of these objects doesn't get collision checks, abort.
if (!(Ship_info[Ships[num].ship_info_index].flags & SIF_DO_COLLISION_CHECK)) {
return 0;
}
if (!(Ship_info[Ships[light_obj->instance].ship_info_index].flags & SIF_DO_COLLISION_CHECK)) {
return 0;
}
// Set up model_collide info
mc_info mc;
memset(&mc, -1, sizeof(mc_info));
// vec3d submodel_hit;
// Do in heavy object RF
mc.model_num = Ships[num].modelnum; // Fill in the model to check
mc.orient = &heavy_obj->orient; // The object's orient
vec3d zero, p0, p1;
vm_vec_zero(&zero); // we need the physical vector and can not set its value to zero
vm_vec_sub(&p0, &light_obj->last_pos, &heavy_obj->last_pos);
vm_vec_sub(&p1, &light_obj->pos, &heavy_obj->pos);
// find the light object's position in the heavy object's reference frame at last frame and also in this frame.
vec3d p0_temp, p0_rotated;
// Collision detection from rotation enabled if at max rotaional velocity and 5fps, rotation is less than PI/2
// This should account for all ships
if ( (vm_vec_mag_squared( &heavy_obj->phys_info.max_rotvel ) * .04) < (PI*PI/4) ) {
// collide_rotate calculate (1) start position and (2) relative velocity
ship_ship_hit_info->collide_rotate = 1;
vm_vec_rotate(&p0_temp, &p0, &heavy_obj->last_orient);
vm_vec_unrotate(&p0_rotated, &p0_temp, &heavy_obj->orient);
mc.p0 = &p0_rotated; // Point 1 of ray to check
vm_vec_sub(&ship_ship_hit_info->light_rel_vel, &p1, &p0_rotated);
vm_vec_scale(&ship_ship_hit_info->light_rel_vel, 1/flFrametime);
} else {
// should be no ships that can rotate this fast
Int3();
ship_ship_hit_info->collide_rotate = 0;
mc.p0 = &p0; // Point 1 of ray to check
vm_vec_sub(&ship_ship_hit_info->light_rel_vel, &light_obj->phys_info.vel, &heavy_obj->phys_info.vel);
}
// Set up collision info
mc.pos = &zero; // The object's position
mc.p1 = &p1; // Point 2 of ray to check
mc.radius = model_get_core_radius( Ships[light_obj->instance].modelnum );
mc.flags = (MC_CHECK_MODEL | MC_CHECK_SPHERELINE); // flags
// Only check invisible face polygons for ship:ship of different teams.
if ( !(Ships[heavy_obj->instance].flags2 & SF2_DONT_COLLIDE_INVIS) ) {
if ((heavy_obj->flags & OF_PLAYER_SHIP) || (light_obj->flags & OF_PLAYER_SHIP) || (Ships[heavy_obj->instance].team != Ships[light_obj->instance].team) ) {
mc.flags |= MC_CHECK_INVISIBLE_FACES;
}
}
// copy important data
int copy_flags = mc.flags; // make a copy of start end positions of sphere in big ship RF
vec3d copy_p0, copy_p1;
copy_p0 = *mc.p0;
copy_p1 = *mc.p1;
// first test against the sphere - if this fails then don't do any submodel tests
mc.flags = MC_ONLY_SPHERE | MC_CHECK_SPHERELINE;
int submodel_list[MAX_ROTATING_SUBMODELS];
int num_rotating_submodels = 0;
int valid_hit_occured = 0;
polymodel *pm;
ship_model_start(heavy_obj);
if (model_collide(&mc)) {
// Set earliest hit time
ship_ship_hit_info->hit_time = FLT_MAX;
// Do collision the cool new way
if ( ship_ship_hit_info->collide_rotate ) {
model_get_rotating_submodel_list(submodel_list, &num_rotating_submodels, heavy_obj);
pm = model_get(Ships[heavy_obj->instance].modelnum);
// turn off all rotating submodels and test for collision
int i;
for (i=0; i<num_rotating_submodels; i++) {
pm->submodel[submodel_list[i]].blown_off = 1;
}
// reset flags to check MC_CHECK_MODEL | MC_CHECK_SPHERELINE and maybe MC_CHECK_INVISIBLE_FACES and MC_SUBMODEL_INSTANCE
mc.flags = copy_flags | MC_SUBMODEL_INSTANCE;
// check each submodel in turn
for (i=0; i<num_rotating_submodels; i++) {
// turn on submodel for collision test
pm->submodel[submodel_list[i]].blown_off = 0;
// set angles for last frame
angles copy_angles = pm->submodel[submodel_list[i]].angs;
// find the start and end positions of the sphere in submodel RF
pm->submodel[submodel_list[i]].angs = pm->submodel[submodel_list[i]].sii->prev_angs;
world_find_model_point(&p0, &light_obj->last_pos, pm, submodel_list[i], &heavy_obj->last_orient, &heavy_obj->last_pos);
pm->submodel[submodel_list[i]].angs = copy_angles;
world_find_model_point(&p1, &light_obj->pos, pm, submodel_list[i], &heavy_obj->orient, &heavy_obj->pos);
mc.p0 = &p0;
mc.p1 = &p1;
// mc.pos = zero // in submodel RF
mc.orient = &vmd_identity_matrix;
mc.submodel_num = submodel_list[i];
if ( model_collide(&mc) ) {
if (mc.hit_dist < ship_ship_hit_info->hit_time ) {
valid_hit_occured = 1;
// set up ship_ship_hit_info common
set_hit_struct_info(ship_ship_hit_info, &mc, SUBMODEL_ROT_HIT);
model_find_world_point(&ship_ship_hit_info->hit_pos, &mc.hit_point, mc.model_num, mc.hit_submodel, &heavy_obj->orient, &zero);
// set up ship_ship_hit_info for rotating submodel
if (ship_ship_hit_info->edge_hit == 0) {
model_find_obj_dir(&ship_ship_hit_info->collision_normal, &mc.hit_normal, heavy_obj, mc.hit_submodel);
}
// find position in submodel RF of light object at collison
vec3d int_light_pos, diff;
vm_vec_sub(&diff, mc.p1, mc.p0);
vm_vec_scale_add(&int_light_pos, mc.p0, &diff, mc.hit_dist);
model_find_world_point(&ship_ship_hit_info->light_collision_cm_pos, &int_light_pos, mc.model_num, mc.hit_submodel, &heavy_obj->orient, &zero);
// submodel_hit = mc.hit_point;
/*
// find position in CM RF of the heavy object at collision
vm_vec_sub(&diff, &heavy_obj->pos, &heavy_obj->last_pos);
vm_vec_scale_add(&int_heavy_pos, &heavy_obj->last_pos, &diff, mc.hit_dist);
// Find orientation of heavy at time of collision. Use last_orientation * delta_orientation.
// heavy last orient * (delta_orient * time)
matrix m_temp, rot_matrix;
float theta;
vec3d rot_axis;
vm_copy_transpose_matrix(&m_temp, &heavy_obj->last_orient); // Mtemp1 = curr ^-1
vm_matrix_x_matrix(&rot_matrix, &m_temp, &heavy_obj->orient); // R = goal * Mtemp1
vm_matrix_to_rot_axis_and_angle(&rot_matrix, &theta, &rot_axis); // determines angle and rotation axis from curr to goal
vm_quaternion_rotate(&m_temp, theta * mc.hit_dist, &rot_axis);
Assert(is_valid_matrix(&m_temp));
vm_matrix_x_matrix(&int_heavy_orient, &heavy_obj->last_orient, &m_temp);
// set submodel angle at time of collision
// TODO: generalize... what happens when angle passes 0 or 2PI
angles temp_angs;
vm_vec_sub(&diff, (vec3d*)&pm->submodel[submodel_list[i]].angs, (vec3d*)&pm->submodel[submodel_list[i]].sii->prev_angs);
vm_vec_scale_add((vec3d*)&temp_angs, (vec3d *)&pm->submodel[submodel_list[i]].sii->prev_angs, &diff, mc.hit_dist);
pm->submodel[submodel_list[i]].angs = temp_angs;
// find intersection point in submodel RF - THEN advance to end of frametime.
vec3d temp = int_light_pos;
world_find_model_point(&int_submodel_pos, &int_light_pos, pm, submodel_list[i], &int_heavy_orient, &int_heavy_pos);
vec3d temp2;
// Advance to end of frametime
pm->submodel[submodel_list[i]].angs = copy_angles;
model_find_world_point(&ship_ship_hit_info->light_collision_cm_pos, &int_submodel_pos, mc.model_num, mc.hit_submodel, mc.orient, &zero);
vm_vec_sub(&temp2, &ship_ship_hit_info->light_collision_cm_pos, &ship_ship_hit_info->hit_pos);
*/
// vec3d temp2;
// vm_vec_sub(&temp2, &ship_ship_hit_info->light_collision_cm_pos, &ship_ship_hit_info->hit_pos);
}
}
// Don't look at this submodel again
pm->submodel[submodel_list[i]].blown_off = 1;
}
}
// Recover and do usual ship_ship collision, but without rotating submodels
mc.flags = copy_flags;
*mc.p0 = copy_p0;
*mc.p1 = copy_p1;
mc.orient = &heavy_obj->orient;
// usual ship_ship collision test
if ( model_collide(&mc) ) {
// check if this is the earliest hit
if (mc.hit_dist < ship_ship_hit_info->hit_time) {
valid_hit_occured = 1;
set_hit_struct_info(ship_ship_hit_info, &mc, SUBMODEL_NO_ROT_HIT);
// get hitpos - heavy_pos
// if ( ship_ship_hit_info->collide_rotate ) {
// model_find_world_point(&ship_ship_hit_info->hit_pos, &mc.hit_point, mc.model_num, mc.hit_submodel, &heavy_obj->orient, &zero);
// }
// get collision normal if not edge hit
if (ship_ship_hit_info->edge_hit == 0) {
model_find_obj_dir(&ship_ship_hit_info->collision_normal, &mc.hit_normal, heavy_obj, mc.hit_submodel);
}
// find position in submodel RF of light object at collison
vec3d diff;
vm_vec_sub(&diff, mc.p1, mc.p0);
vm_vec_scale_add(&ship_ship_hit_info->light_collision_cm_pos, mc.p0, &diff, mc.hit_dist);
// submodel_hit = mc.hit_point;
}
}
ship_model_stop( heavy_obj );
}
if (valid_hit_occured) {
// Collision debug stuff
#ifdef DEBUG
object *collide_obj = NULL;
if (heavy_obj == Player_obj) {
collide_obj = light_obj;
} else if (light_obj == Player_obj) {
collide_obj = heavy_obj;
}
if ((collide_obj != NULL) && (Ship_info[Ships[collide_obj->instance].ship_info_index].flags & (SIF_FIGHTER | SIF_BOMBER))) {
char *submode_string = "";
ai_info *aip;
extern char *Mode_text[];
aip = &Ai_info[Ships[collide_obj->instance].ai_index];
if (aip->mode == AIM_CHASE)
submode_string = Submode_text[aip->submode];
nprintf(("AI", "Player collided with ship %s, AI mode = %s, submode = %s\n", Ships[collide_obj->instance].ship_name, Mode_text[aip->mode], submode_string));
}
#endif
// Update ai to deal with collisions
if (heavy_obj-Objects == Ai_info[Ships[light_obj->instance].ai_index].target_objnum) {
Ai_info[Ships[light_obj->instance].ai_index].ai_flags |= AIF_TARGET_COLLISION;
}
if (light_obj-Objects == Ai_info[Ships[heavy_obj->instance].ai_index].target_objnum) {
Ai_info[Ships[heavy_obj->instance].ai_index].ai_flags |= AIF_TARGET_COLLISION;
}
// SET PHYSICS PARAMETERS
// already have (hitpos - heavy) and light_cm_pos
// get heavy cm pos - already have light_cm_pos
ship_ship_hit_info->heavy_collision_cm_pos = zero;
// get r_heavy and r_light
ship_ship_hit_info->r_heavy = ship_ship_hit_info->hit_pos;
vm_vec_sub(&ship_ship_hit_info->r_light, &ship_ship_hit_info->hit_pos, &ship_ship_hit_info->light_collision_cm_pos);
// set normal for edge hit
if ( ship_ship_hit_info->edge_hit ) {
vm_vec_copy_normalize(&ship_ship_hit_info->collision_normal, &ship_ship_hit_info->r_light);
vm_vec_negate(&ship_ship_hit_info->collision_normal);
}
// get world hitpos
vm_vec_add(hitpos, &ship_ship_hit_info->heavy->pos, &ship_ship_hit_info->r_heavy);
/*
vec3d temp1, temp2, temp3, diff;
vm_vec_add(&temp1, &ship_ship_hit_info->light_collision_cm_pos, &ship_ship_hit_info->r_light);
vm_vec_add(&temp2, &ship_ship_hit_info->heavy_collision_cm_pos, &ship_ship_hit_info->r_heavy);
vm_vec_sub(&diff, &temp2, &temp1);
ship_model_start( heavy_obj );
pm = model_get(Ships[heavy_obj->instance].modelnum);
world_find_model_point(&temp3, hitpos, pm, ship_ship_hit_info->submodel_num, &heavy_obj->orient, &heavy_obj->pos);
ship_model_stop( heavy_obj );
vm_vec_sub(&diff, &submodel_hit, &temp3);
if (vm_vec_mag(&diff) > 0.1) {
Int3();
} */
// do physics
calculate_ship_ship_collision_physics(ship_ship_hit_info);
// Provide some separation for the case of same team
if (Ships[heavy_obj->instance].team == Ships[light_obj->instance].team) {
ship *heavy_shipp = &Ships[heavy_obj->instance];
ship *light_shipp = &Ships[light_obj->instance];
// If a couple of small ships, just move them apart.
if ((Ship_info[heavy_shipp->ship_info_index].flags & SIF_SMALL_SHIP) && (Ship_info[light_shipp->ship_info_index].flags & SIF_SMALL_SHIP)) {
if ((heavy_obj->flags & OF_PLAYER_SHIP) || (light_obj->flags & OF_PLAYER_SHIP)) {
/*
vec3d h2l_vec;
float mass_sum = heavy_obj->phys_info.mass + light_obj->phys_info.mass;
float lh_ratio;
lh_ratio = light_obj->phys_info.mass/mass_sum;
if (lh_ratio < 0.2f) {
lh_ratio = 0.2f;
}
// actually initialize h2l_vec
vm_vec_sub(&h2l_vec, &light_obj->pos, &heavy_obj->pos);
// Choose best direction to move objects. Want to move away from collision point.
// Hmm, maybe this is needlessly complex. Maybe should use collision point and slide them
// away from that? -- MK, 4/5/98
if (vm_vec_dot(&light_obj->phys_info.vel, &h2l_vec) > 0.0f) {
vm_vec_scale_add2(&light_obj->phys_info.vel, &h2l_vec, 10.0f * (1.0f - lh_ratio));
} else {
if (vm_vec_dot(&light_obj->orient.rvec, &h2l_vec) < 0.0f) {
vm_vec_scale_add2(&light_obj->phys_info.vel, &light_obj->orient.rvec, -10.0f * (1.0f - lh_ratio));
} else {
vm_vec_scale_add2(&light_obj->phys_info.vel, &light_obj->orient.rvec, +10.0f * (1.0f - lh_ratio));
}
}
if (vm_vec_dot(&heavy_obj->phys_info.vel, &h2l_vec) < 0.0f) {
vm_vec_scale_add2(&heavy_obj->phys_info.vel, &h2l_vec, 10.0f * (1.0f - lh_ratio));
} else {
if (vm_vec_dot(&heavy_obj->orient.rvec, &h2l_vec) < 0.0f) {
vm_vec_scale_add2(&light_obj->phys_info.vel, &light_obj->orient.rvec, +10.0f * (1.0f - lh_ratio));
} else {
vm_vec_scale_add2(&light_obj->phys_info.vel, &light_obj->orient.rvec, -10.0f * (1.0f - lh_ratio));
}
}*/
vec3d h_to_l_vec;
vec3d rel_vel_h;
vec3d perp_rel_vel;
vm_vec_sub(&h_to_l_vec, &heavy_obj->pos, &light_obj->pos);
vm_vec_sub(&rel_vel_h, &heavy_obj->phys_info.vel, &light_obj->phys_info.vel);
float mass_sum = light_obj->phys_info.mass + heavy_obj->phys_info.mass;
// get comp of rel_vel perp to h_to_l_vec;
float mag = vm_vec_dotprod(&h_to_l_vec, &rel_vel_h) / vm_vec_mag_squared(&h_to_l_vec);
vm_vec_scale_add(&perp_rel_vel, &rel_vel_h, &h_to_l_vec, -mag);
vm_vec_normalize(&perp_rel_vel);
vm_vec_scale_add2(&heavy_obj->phys_info.vel, &perp_rel_vel, SEP_VEL * light_obj->phys_info.mass / mass_sum);
vm_vec_scale_add2(&light_obj->phys_info.vel, &perp_rel_vel, -SEP_VEL * heavy_obj->phys_info.mass / mass_sum);
vm_vec_rotate( &heavy_obj->phys_info.prev_ramp_vel, &heavy_obj->phys_info.vel, &heavy_obj->orient );
vm_vec_rotate( &light_obj->phys_info.prev_ramp_vel, &light_obj->phys_info.vel, &light_obj->orient );
}
} else {
// add extra velocity to separate the two objects, backing up the direction we came in.
// TODO: add effect of velocity from rotating submodel
float rel_vel = vm_vec_mag_quick( &ship_ship_hit_info->light_rel_vel);
if (rel_vel < 1) {
rel_vel = 1.0f;
}
float mass_sum = heavy_obj->phys_info.mass + light_obj->phys_info.mass;
vm_vec_scale_add2( &heavy_obj->phys_info.vel, &ship_ship_hit_info->light_rel_vel, SEP_VEL*light_obj->phys_info.mass/(mass_sum*rel_vel) );
vm_vec_rotate( &heavy_obj->phys_info.prev_ramp_vel, &heavy_obj->phys_info.vel, &heavy_obj->orient );
vm_vec_scale_add2( &light_obj->phys_info.vel, &ship_ship_hit_info->light_rel_vel, -SEP_VEL*heavy_obj->phys_info.mass/(mass_sum*rel_vel) );
vm_vec_rotate( &light_obj->phys_info.prev_ramp_vel, &light_obj->phys_info.vel, &light_obj->orient );
}
}
}
return valid_hit_occured;
}
// gets modified mass of cruiser in cruiser/asteroid collision so cruisers dont get bumped so hard.
// modified mass is 10x, 4x, or 2x larger than asteroid mass
// returns 1 if modified mass is larger than given mass, 0 otherwise
int check_special_cruiser_asteroid_collision(object *heavy, object *light, float *cruiser_mass, int *cruiser_light)
{
#ifndef FS2_DEMO
int asteroid_type;
if (heavy->type == OBJ_ASTEROID) {
Assert(light->type == OBJ_SHIP);
if (Ship_info[Ships[light->instance].ship_info_index].flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP)) {
asteroid_type = Asteroids[heavy->instance].asteroid_type;
if (asteroid_type == 0) {
*cruiser_mass = 10.0f * heavy->phys_info.mass;
} else if (asteroid_type == 1) {
*cruiser_mass = 4.0f * heavy->phys_info.mass;
} else {
*cruiser_mass = 2.0f * heavy->phys_info.mass;
}
if (*cruiser_mass > light->phys_info.mass) {
*cruiser_light = 1;
return 1;
}
}
} else if (light->type == OBJ_ASTEROID) {
Assert(heavy->type == OBJ_SHIP);
if (Ship_info[Ships[heavy->instance].ship_info_index].flags & SIF_BIG_SHIP) {
asteroid_type = Asteroids[light->instance].asteroid_type;
if (asteroid_type == 0) {
*cruiser_mass = 10.0f * light->phys_info.mass;
} else if (asteroid_type == 1) {
*cruiser_mass = 4.0f * light->phys_info.mass;
} else {
*cruiser_mass = 2.0f * light->phys_info.mass;
}
if (*cruiser_mass > heavy->phys_info.mass) {
*cruiser_light = 0;
return 1;
}
}
}
#endif
return 0;
}
// ------------------------------------------------------------------------------------------------
// input: ship_ship_hit => structure containing ship_ship hit info
// (includes) A, B => objects colliding
// r_A, r_B => position to collision from center of mass
// collision_normal => collision_normal (outward from B)
//
// output: velocity, angular velocity, impulse
//
// ------------------------------------------------------------------------------------------------
//
// calculates correct physics response to collision between two objects given
// masses, moments of inertia, velocities, angular velocities,
// relative collision positions, and the impulse direction
//
void calculate_ship_ship_collision_physics(collision_info_struct *ship_ship_hit_info)
{
// important parameters passed thru ship_ship_or_debris_hit
// calculate the whack applied to each ship from collision
// make local copies of hit_struct parameters
object *heavy = ship_ship_hit_info->heavy;
object *light = ship_ship_hit_info->light;
// make cruiser/asteroid collision softer on cruisers.
int special_cruiser_asteroid_collision;
int cruiser_light = 0;
float cruiser_mass = 0.0f, copy_mass = 0.0f;
special_cruiser_asteroid_collision = check_special_cruiser_asteroid_collision(heavy, light, &cruiser_mass, &cruiser_light);
if (special_cruiser_asteroid_collision) {
if (cruiser_light) {
Assert(light->phys_info.mass < cruiser_mass);
copy_mass = light->phys_info.mass;
light->phys_info.mass = cruiser_mass;
} else {
Assert(heavy->phys_info.mass < cruiser_mass);
copy_mass = heavy->phys_info.mass;
heavy->phys_info.mass = cruiser_mass;
}
}
float coeff_restitution; // parameter controls amount of bounce
float v_rel_normal_m; // relative collision velocity in the direction of the collision normal
vec3d v_rel_parallel_m; // normalized v_rel (Va-Vb) projected onto collision surface
vec3d world_rotvel_heavy_m, world_rotvel_light_m, vel_from_rotvel_heavy_m, vel_from_rotvel_light_m, v_rel_m, vel_heavy_m, vel_light_m;
coeff_restitution = 0.1f; // relative velocity wrt normal is zero after the collision ( range 0-1 )
// find velocity of each obj at collision point
// heavy object is in cm reference frame so we don't get a v_heavy term.
if ( ship_ship_hit_info->collide_rotate ) {
// if we have collisions from rotation, the effective velocity from rotation of the large body is alreay taken account
vm_vec_zero( &vel_heavy_m );
} else {
// take account the effective velocity from rotation
vm_vec_unrotate(&world_rotvel_heavy_m, &heavy->phys_info.rotvel, &heavy->orient); // heavy's world rotvel before collision
vm_vec_crossprod(&vel_from_rotvel_heavy_m, &world_rotvel_heavy_m, &ship_ship_hit_info->r_heavy); // heavy's velocity from rotvel before collision
vel_heavy_m = vel_from_rotvel_heavy_m;
}
// if collision from rotating submodel of heavy obj, add in vel from rotvel of submodel
vec3d local_vel_from_submodel;
if (ship_ship_hit_info->submodel_rot_hit == 1) {
bool set_model = false;
polymodel *pm = model_get(Ships[heavy->instance].modelnum);
// be sure model is set
if (pm->submodel[ship_ship_hit_info->submodel_num].sii == NULL) {
set_model = true;
ship_model_start(heavy);
}
// set point on axis of rotating submodel if not already set.
if (!pm->submodel[ship_ship_hit_info->submodel_num].sii->axis_set) {
model_init_submodel_axis_pt(pm->submodel[ship_ship_hit_info->submodel_num].sii, Ships[heavy->instance].modelnum, ship_ship_hit_info->submodel_num);
}
vec3d omega, axis, r_rot;
if (pm->submodel[ship_ship_hit_info->submodel_num].movement_axis == MOVEMENT_AXIS_X) {
axis = vmd_x_vector;
} else if (pm->submodel[ship_ship_hit_info->submodel_num].movement_axis == MOVEMENT_AXIS_Y) {
axis = vmd_y_vector;
} else if (pm->submodel[ship_ship_hit_info->submodel_num].movement_axis == MOVEMENT_AXIS_Z) {
axis = vmd_z_vector;
} else {
// must be one of these axes or submodel_rot_hit is incorrectly set
Int3();
}
// get world rotational velocity of rotating submodel
model_find_obj_dir(&omega, &axis, heavy, ship_ship_hit_info->submodel_num);
vm_vec_scale(&omega, pm->submodel[ship_ship_hit_info->submodel_num].sii->cur_turn_rate);
// world coords for r_rot
vec3d temp;
vm_vec_unrotate(&temp, &pm->submodel[ship_ship_hit_info->submodel_num].sii->pt_on_axis, &heavy->orient);
vm_vec_sub(&r_rot, &ship_ship_hit_info->hit_pos, &temp);
// vm_vec_rotate(&temp, &r_rot, &heavy->orient); // to ship coords
vm_vec_crossprod(&local_vel_from_submodel, &omega, &r_rot);
// vm_vec_rotate(&temp, &local_vel_from_submodel, &heavy->orient); // to ship coords
// if (vm_vec_dotprod(&local_vel_from_submodel, &ship_ship_hit_info->collision_normal) > 0) {
// nprintf(("Physics", "Rotating submodel collision - got whacked\n"));
// } else {
// nprintf(("Physics", "Rotating submodel collision - sub got whacked from behind\n"));
// }
if (set_model) {
ship_model_stop(heavy);
}
} else {
// didn't collide with submodel
vm_vec_zero(&local_vel_from_submodel);
}
vm_vec_unrotate(&world_rotvel_light_m, &light->phys_info.rotvel, &light->orient); // light's world rotvel before collision
vm_vec_crossprod(&vel_from_rotvel_light_m, &world_rotvel_light_m, &ship_ship_hit_info->r_light); // light's velocity from rotvel before collision
vm_vec_add(&vel_light_m, &vel_from_rotvel_light_m, &ship_ship_hit_info->light_rel_vel);
vm_vec_sub(&v_rel_m, &vel_light_m, &vel_heavy_m);
// Add in effect of rotating submodel
vm_vec_sub2(&v_rel_m, &local_vel_from_submodel);
v_rel_normal_m = vm_vec_dotprod(&v_rel_m, &ship_ship_hit_info->collision_normal);// if less than zero, colliding contact taking place
// (v_slow - v_fast) dot (n_fast)
if (v_rel_normal_m > 0) {
// This can happen in 2 situations.
// (1) The rotational velocity is large enough to cause ships to miss. In this case, there would most likely
// have been a collision, but at a later time, so reset v_rel_normal_m
// (2) We could also have just gotten a slightly incorrect hitpos, where r dot v_rel is nearly zero.
// In this case, we know there was a collision, but slight collision and the normal is correct, so reset v_rel_normal_m
// need a normal direction. We can just take the -v_light normalized. v_rel_normal_m = -v_rel_normal_m;
nprintf(("Physics", "Frame %i reset v_rel_normal_m %f Edge %i\n", Framecount, v_rel_normal_m, ship_ship_hit_info->edge_hit));
// if (v_rel_normal_m > 5)
// Warning(LOCATION, "v_rel_normal_m > 5 %f Get Dave A.\n", -v_rel_normal_m);
v_rel_normal_m = -v_rel_normal_m;
}
vec3d rotational_impulse_heavy, rotational_impulse_light, delta_rotvel_heavy, delta_rotvel_light;
vec3d delta_vel_from_delta_rotvel_heavy, delta_vel_from_delta_rotvel_light, impulse;
float impulse_mag, heavy_denom, light_denom;
matrix heavy_I_inv, light_I_inv;
// include a frictional collision impulse F parallel to the collision plane
// F = I * sin (collision_normal, normalized v_rel_m) [sin is ratio of v_rel_parallel_m to v_rel_m]
// note: (-) sign is needed to account for the direction of the v_rel_parallel_m
float collision_speed_parallel;
float parallel_mag;
impulse = ship_ship_hit_info->collision_normal;
vm_vec_projection_onto_plane(&v_rel_parallel_m, &v_rel_m, &ship_ship_hit_info->collision_normal);
collision_speed_parallel = vm_vec_normalize_safe(&v_rel_parallel_m);
parallel_mag = float(-COLLISION_FRICTION_FACTOR) * collision_speed_parallel / vm_vec_mag(&v_rel_m);
vm_vec_scale_add2(&impulse, &v_rel_parallel_m, parallel_mag);
// calculate the effect on the velocity of the collison point per unit impulse
// first find the effect thru change in rotvel
// then find the change in the cm vel
if (heavy == Player_obj) {
vm_vec_zero( &delta_rotvel_heavy );
heavy_denom = 1.0f / heavy->phys_info.mass;
} else {
vm_vec_crossprod(&rotational_impulse_heavy, &ship_ship_hit_info->r_heavy, &impulse);
get_I_inv(&heavy_I_inv, &heavy->phys_info.I_body_inv, &heavy->orient);
vm_vec_rotate(&delta_rotvel_heavy, &rotational_impulse_heavy, &heavy_I_inv);
vm_vec_scale(&delta_rotvel_heavy, float(COLLISION_ROTATION_FACTOR)); // hack decrease rotation (delta_rotvel)
vm_vec_crossprod(&delta_vel_from_delta_rotvel_heavy, &delta_rotvel_heavy , &ship_ship_hit_info->r_heavy);
heavy_denom = vm_vec_dotprod(&delta_vel_from_delta_rotvel_heavy, &ship_ship_hit_info->collision_normal);
if (heavy_denom < 0) {
// sanity check
heavy_denom = 0.0f;
}
heavy_denom += 1.0f / heavy->phys_info.mass;
}
// calculate the effect on the velocity of the collison point per unit impulse
// first find the effect thru change in rotvel
// then find the change in the cm vel
if (light == Player_obj) {
vm_vec_zero( &delta_rotvel_light );
light_denom = 1.0f / light->phys_info.mass;
} else {
vm_vec_crossprod(&rotational_impulse_light, &ship_ship_hit_info->r_light, &impulse);
get_I_inv(&light_I_inv, &light->phys_info.I_body_inv, &light->orient);
vm_vec_rotate(&delta_rotvel_light, &rotational_impulse_light, &light_I_inv);
vm_vec_scale(&delta_rotvel_light, float(COLLISION_ROTATION_FACTOR)); // hack decrease rotation (delta_rotvel)
vm_vec_crossprod(&delta_vel_from_delta_rotvel_light, &delta_rotvel_light, &ship_ship_hit_info->r_light);
light_denom = vm_vec_dotprod(&delta_vel_from_delta_rotvel_light, &ship_ship_hit_info->collision_normal);
if (light_denom < 0) {
// sanity check
light_denom = 0.0f;
}
light_denom += 1.0f / light->phys_info.mass;
}
// calculate the necessary impulse to achieved the desired relative velocity after the collision
// update damage info in mc
impulse_mag = -(1.0f + coeff_restitution)*v_rel_normal_m / (heavy_denom + light_denom);
ship_ship_hit_info->impulse = impulse_mag;
if (impulse_mag < 0) {
nprintf(("Physics", "negative impulse mag -- Get Dave A if not Descent Physics\n"));
impulse_mag = -impulse_mag;
}
// update the physics info structs for heavy and light objects
// since we have already calculated delta rotvel for heavy and light in world coords
// physics should not have to recalculate this, just change into body coords (done in collide_whack)
vm_vec_scale(&impulse, impulse_mag);
//Assert(impulse_mag < 20e6);
vm_vec_scale(&delta_rotvel_light, impulse_mag);
physics_collide_whack(&impulse, &delta_rotvel_light, &light->phys_info, &light->orient);
vm_vec_negate(&impulse);
vm_vec_scale(&delta_rotvel_heavy, -impulse_mag);
physics_collide_whack(&impulse, &delta_rotvel_heavy, &heavy->phys_info, &heavy->orient);
// Find final positions
// We will try not to worry about the left over time in the frame
// heavy's position unchanged by collision
// light's position is heavy's position plus relative position from heavy
vm_vec_add(&light->pos, &heavy->pos, &ship_ship_hit_info->light_collision_cm_pos);
// Try to move each body back to its position just before collision occured to prevent interpenetration
// Move away in direction of light and away in direction of normal
vec3d direction_light; // direction light is moving relative to heavy
vm_vec_sub(&direction_light, &ship_ship_hit_info->light_rel_vel, &local_vel_from_submodel);
vm_vec_normalize_safe(&direction_light);
Assert( !vm_is_vec_nan(&direction_light) );
vm_vec_scale_add2(&heavy->pos, &direction_light, 0.2f * light->phys_info.mass / (heavy->phys_info.mass + light->phys_info.mass));
vm_vec_scale_add2(&light->pos, &direction_light, -0.2f * heavy->phys_info.mass / (heavy->phys_info.mass + light->phys_info.mass));
vm_vec_scale_add2(&heavy->pos, &ship_ship_hit_info->collision_normal, -0.1f * light->phys_info.mass / (heavy->phys_info.mass + light->phys_info.mass));
vm_vec_scale_add2(&light->pos, &ship_ship_hit_info->collision_normal, 0.1f * heavy->phys_info.mass / (heavy->phys_info.mass + light->phys_info.mass));
// restore mass in case of special cruuiser / asteroid collision
if (special_cruiser_asteroid_collision) {
if (cruiser_light) {
light->phys_info.mass = copy_mass;
} else {
heavy->phys_info.mass = copy_mass;
}
}
}
// ------------------------------------------------------------------------------------------------
// get_I_inv()
//
// input: I_inv_body => inverse moment of inertia matrix in body coordinates
// orient => orientation matrix
//
// output: I_inv => inverse moment of inertia matrix in world coordinates
// ------------------------------------------------------------------------------------------------
//
// calculates the inverse moment of inertia matrix from the body matrix and oreint matrix
//
void get_I_inv (matrix* I_inv, matrix* I_inv_body, matrix* orient)
{
matrix Mtemp1, Mtemp2;
// I_inv = (Rt)(I_inv_body)(R)
// This is opposite to what is commonly seen in books since we are rotating coordianates axes
// which is equivalent to rotating in the opposite direction (or transpose)
vm_matrix_x_matrix(&Mtemp1, I_inv_body, orient);
vm_copy_transpose_matrix(&Mtemp2, orient);
vm_matrix_x_matrix(I_inv, &Mtemp2, &Mtemp1);
}
#define PLANET_DAMAGE_SCALE 4.0f
#define PLANET_DAMAGE_RANGE 3 // If within this factor of radius, apply damage.
fix Last_planet_damage_time = 0;
extern void hud_start_text_flash(char *txt, int t);
// Procss player_ship:planet damage.
// If within range of planet, apply damage to ship.
void mcp_1(object *player_objp, object *planet_objp)
{
float planet_radius;
float dist;
planet_radius = planet_objp->radius;
dist = vm_vec_dist_quick(&player_objp->pos, &planet_objp->pos);
if (dist > planet_radius*PLANET_DAMAGE_RANGE)
return;
ship_apply_global_damage( player_objp, planet_objp, NULL, PLANET_DAMAGE_SCALE * flFrametime * (float)pow((planet_radius*PLANET_DAMAGE_RANGE)/dist, 3.0f) );
if ((Missiontime - Last_planet_damage_time > F1_0) || (Missiontime < Last_planet_damage_time)) {
HUD_sourced_printf(HUD_SOURCE_HIDDEN, XSTR( "Too close to planet. Taking damage!", 465));
Last_planet_damage_time = Missiontime;
snd_play_3d( &Snds[SND_ABURN_ENGAGE], &player_objp->pos, &View_position );
}
}
// Return true if *objp is a planet, else return false.
// Hack: Just checking first six letters of name.
int is_planet(object *objp)
{
return (strnicmp(Ships[objp->instance].ship_name, NOX("planet"), 6) == 0);
}
// If exactly one of these is a planet and the other is a player ship, do something special.
// Return true if this was a ship:planet (or planet_ship) collision and we processed it.
// Else return false.
int maybe_collide_planet (object *obj1, object *obj2)
{
ship_info *sip1, *sip2;
sip1 = &Ship_info[Ships[obj1->instance].ship_info_index];
sip2 = &Ship_info[Ships[obj2->instance].ship_info_index];
if (sip1->flags & SIF_PLAYER_SHIP) {
if (is_planet(obj2)) {
mcp_1(obj1, obj2);
return 1;
}
} else if (is_planet(obj1)) {
if (sip2->flags & SIF_PLAYER_SHIP) {
mcp_1(obj2, obj1);
return 1;
}
}
return 0;
}
// Given a global point and an object, get the quadrant number the point belongs to.
int get_ship_quadrant_from_global(vec3d *global_pos, object *objp)
{
vec3d tpos;
vec3d rotpos;
vm_vec_sub(&tpos, global_pos, &objp->pos);
vm_vec_rotate(&rotpos, &tpos, &objp->orient);
return get_quadrant(&rotpos);
}
#define MIN_REL_SPEED_FOR_LOUD_COLLISION 50 // relative speed of two colliding objects at which we play the "loud" collide sound
void collide_ship_ship_sounds_init()
{
Player_collide_sound = -1;
AI_collide_sound = -1;
Player_collide_shield_sound = -1;
AI_collide_shield_sound = -1;
}
// determine what sound to play when two ships collide
void collide_ship_ship_do_sound(vec3d *world_hit_pos, object *A, object *B, int player_involved)
{
vec3d rel_vel;
float rel_speed;
int light_collision=0;
vm_vec_sub(&rel_vel, &A->phys_info.desired_vel, &B->phys_info.desired_vel);
rel_speed = vm_vec_mag_quick(&rel_vel);
if ( rel_speed > MIN_REL_SPEED_FOR_LOUD_COLLISION ) {
snd_play_3d( &Snds[SND_SHIP_SHIP_HEAVY], world_hit_pos, &View_position );
} else {
light_collision=1;
if ( player_involved ) {
if ( !snd_is_playing(Player_collide_sound) ) {
Player_collide_sound = snd_play_3d( &Snds[SND_SHIP_SHIP_LIGHT], world_hit_pos, &View_position );
}
} else {
if ( !snd_is_playing(AI_collide_sound) ) {
AI_collide_sound = snd_play_3d( &Snds[SND_SHIP_SHIP_LIGHT], world_hit_pos, &View_position );
}
}
}
// maybe play a "shield" collision sound overlay if appropriate
if ( (get_shield_strength(A) > 5) || (get_shield_strength(B) > 5) ) {
float vol_scale=1.0f;
if ( light_collision ) {
vol_scale=0.7f;
}
if ( player_involved ) {
if ( !snd_is_playing(Player_collide_sound) ) {
Player_collide_shield_sound = snd_play_3d( &Snds[SND_SHIP_SHIP_SHIELD], world_hit_pos, &View_position );
}
} else {
if ( !snd_is_playing(Player_collide_sound) ) {
AI_collide_shield_sound = snd_play_3d( &Snds[SND_SHIP_SHIP_SHIELD], world_hit_pos, &View_position );
}
}
}
}
// obj1 and obj2 collided.
// If different teams, kamikaze bit set and other ship is large, auto-explode!
void do_kamikaze_crash(object *obj1, object *obj2)
{
ai_info *aip1, *aip2;
ship *ship1, *ship2;
ship1 = &Ships[obj1->instance];
ship2 = &Ships[obj2->instance];
aip1 = &Ai_info[ship1->ai_index];
aip2 = &Ai_info[ship2->ai_index];
if (ship1->team != ship2->team) {
if (aip1->ai_flags & AIF_KAMIKAZE) {
if (Ship_info[ship2->ship_info_index].flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP)) {
obj1->hull_strength = KAMIKAZE_HULL_ON_DEATH;
set_shield_strength(obj1, 0.0f);
}
} if (aip2->ai_flags & AIF_KAMIKAZE) {
if (Ship_info[ship1->ship_info_index].flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP)) {
obj2->hull_strength = KAMIKAZE_HULL_ON_DEATH;
set_shield_strength(obj2, 0.0f);
}
}
}
}
// response when hit by fast moving cap ship
void maybe_push_little_ship_from_fast_big_ship(object *big_obj, object *small_obj, float impulse, vec3d *normal)
{
// Move player out of the way of a BIG|HUGE ship warping in or out
if (Ship_info[Ships[big_obj->instance].ship_info_index].flags & (SIF_CAPITAL|SIF_SUPERCAP)) {
if (Ship_info[Ships[small_obj->instance].ship_info_index].flags & (SIF_SMALL_SHIP)) {
float big_speed = vm_vec_mag_quick(&big_obj->phys_info.vel);
if (big_speed > 3*big_obj->phys_info.max_vel.xyz.z) {
// push player away in direction perp to forward of big ship
// get perp vec
vec3d temp, perp;
vm_vec_sub(&temp, &small_obj->pos, &big_obj->pos);
vm_vec_scale_add(&perp, &temp, &big_obj->orient.vec.fvec, -vm_vec_dotprod(&temp, &big_obj->orient.vec.fvec));
vm_vec_normalize_quick(&perp);
// don't drive into sfc we just collided with
if (vm_vec_dotprod(&perp, normal) < 0) {
vm_vec_negate(&perp);
}
// get magnitude of added perp vel
float added_perp_vel_mag = impulse / small_obj->phys_info.mass;
// add to vel and ramp vel
vm_vec_scale_add2(&small_obj->phys_info.vel, &perp, added_perp_vel_mag);
vm_vec_rotate(&small_obj->phys_info.prev_ramp_vel, &small_obj->phys_info.vel, &small_obj->orient);
}
}
}
}
// Checks ship-ship collisions. pair->a and pair->b are ships.
// Returns 1 if all future collisions between these can be ignored
// Always returns 0, since two ships can always collide unless one (1) dies or (2) warps out.
int collide_ship_ship( obj_pair * pair )
{
int player_involved;
float dist;
object *A = pair->a;
object *B = pair->b;
if ( A->type == OBJ_WAYPOINT ) return 1;
if ( B->type == OBJ_WAYPOINT ) return 1;
Assert( A->type == OBJ_SHIP );
Assert( B->type == OBJ_SHIP );
// If the player is one of the two colliding ships, flag this... it is used in
// several places this function.
if ( A == Player_obj || B == Player_obj ) {
player_involved = 1;
} else {
player_involved = 0;
}
// Don't check collisions for warping out player if past stage 1.
if ( player_involved && (Player->control_mode > PCM_WARPOUT_STAGE1) ) {
return 0;
}
dist = vm_vec_dist( &A->pos, &B->pos );
// If one of these is a planet, do special stuff.
if (maybe_collide_planet(A, B))
return 0;
if ( dist < A->radius + B->radius ) {
int hit;
object *HeavyOne, *LightOne;
// if two objects have the same mass, make the one with the larger pointer address the HeavyOne.
if ( fl_abs(A->phys_info.mass - B->phys_info.mass) < 1 ) {
if (A > B) {
HeavyOne = A;
LightOne = B;
} else {
HeavyOne = B;
LightOne = A;
}
} else {
if (A->phys_info.mass > B->phys_info.mass) {
HeavyOne = A;
LightOne = B;
} else {
HeavyOne = B;
LightOne = A;
}
}
// create ship_ship_or_debris_hit
// inputs obj A, obj B
// outputs hitpos, impulse (for damage), shield hit tri (for quadrant)
collision_info_struct ship_ship_hit_info;
memset(&ship_ship_hit_info, -1, sizeof(collision_info_struct));
ship_ship_hit_info.heavy = HeavyOne; // heavy object, generally slower moving
ship_ship_hit_info.light = LightOne; // light object, generally faster moving
vec3d world_hit_pos;
hit = ship_ship_check_collision(&ship_ship_hit_info, &world_hit_pos);
/* if ((hitpos.x == FastOne->pos.x) && (hitpos.y == FastOne->pos.y) && (hitpos.z == FastOne->pos.z))
Int3();
if ((hitpos.x == SlowOne->pos.x) && (hitpos.y == SlowOne->pos.y) && (hitpos.z == SlowOne->pos.z))
Int3();
if ((A == FastOne) && (hitpos.x == FastOne->last_pos.x) && (hitpos.y == FastOne->last_pos.y) && (hitpos.z == FastOne->last_pos.z))
Int3();
*/
if ( hit ) {
float damage;
if ( player_involved && (Player->control_mode == PCM_WARPOUT_STAGE1) ) {
gameseq_post_event( GS_EVENT_PLAYER_WARPOUT_STOP );
HUD_printf(XSTR( "Warpout sequence aborted.", 466));
}
// vec3d rel_vec;
// Hack, following line would cause a null vector in vm_vec_normalized_dir below. This should prevent it.
// FastOne->pos = FastOne->last_pos;
// vm_vec_scale_add2(&FastOne->pos, &FastOne->last_pos, 0.01f);
// vm_vec_scale(&FastOne->pos, 1.0f/1.01f);
// Amount of damage done by a collision changed by MK, 11/19/96.
// Now uses relative velocity and ignores shield of objects. No reason
// smacking into a capital ship should damage you 1000 times as much as
// smacking into a fighter. Depends on your velocity and whether you
// smack headon or barely glance.
// Amount of damage done by a collision changed by DA 08/26/97.
// Amount of damage now depends on impulse imparted by a collision,
// scaled by max momentum of a ship, so ramming full speed head on into an
// immovable object should kill you.
// vm_vec_sub(&rel_vec, &B->phys_info.vel, &A->phys_info.vel);
// damage = vm_vec_mag_quick(&rel_vec);
// float impulse = 0.0f; // HACK!!! Should be something, right?
damage = 0.005f * ship_ship_hit_info.impulse; // Cut collision-based damage in half.
// Decrease heavy damage by 2x.
if (damage > 5.0f){
damage = 5.0f + (damage - 5.0f)/2.0f;
}
do_kamikaze_crash(A, B);
if (ship_ship_hit_info.impulse > 0) {
float q;
q = vm_vec_dist_quick(&A->pos, &B->pos) / (A->radius + B->radius);
#ifndef NDEBUG
// //nprintf(("AI", "Frame %i: %s and %s, dam=%7.2f. dist/rad=%5.2f. Zeroing.\n", Framecount, Ships[A->instance].ship_name, Ships[B->instance].ship_name, damage, q));
// if (damage > 5.0f) {
// if ( player_involved ) {
// object *other_objp;
// float dot;
// vec3d v2h;
//
// if (A == Player_obj)
// other_objp = B;
// else
// other_objp = A;
//
// vm_vec_normalized_dir(&v2h, &ship_ship_hit_info.hit_pos, &Player_obj->pos);
// dot = vm_vec_dot(&Player_obj->orient.fvec, &v2h);
// // HUD_printf("Collision %s: %i%%. (dot=%5.2f), dist ratio=%5.2f", Ships[other_objp->instance].ship_name, (int) (100.0f * damage/Ships[Player_obj->instance].ship_max_hull_strength), dot,
// // vm_vec_dist_quick(&Player_obj->pos, &other_objp->pos) / (Player_obj->radius + other_objp->radius));
// }
// }
#endif
if ( player_involved ) {
hud_start_text_flash(XSTR("Collision", 1431), 2000);
}
}
// damage *= (max_shields of fastest) / (max_impulse_of_fastest)
// possibly calculate damage both ways and use largest/smallest/avg?
// vm_vec_add(&world_hit_pos, &ship_ship_hit_info.heavy->pos, &ship_ship_hit_info.hit_pos);
collide_ship_ship_do_sound(&world_hit_pos, A, B, player_involved);
// check if we should do force feedback stuff
if (player_involved && (ship_ship_hit_info.impulse > 0)) {
float scaler;
vec3d v;
scaler = -ship_ship_hit_info.impulse / Player_obj->phys_info.mass * 300;
vm_vec_copy_normalize(&v, &world_hit_pos);
joy_ff_play_vector_effect(&v, scaler);
}
//mprintf(("Ship:Ship damage = %7.3f\n", speed));
#ifndef NDEBUG
if ( !Collide_friendly ) {
if ( Ships[A->instance].team == Ships[B->instance].team ) {
vec3d collision_vec, right_angle_vec;
vm_vec_normalized_dir(&collision_vec, &ship_ship_hit_info.hit_pos, &A->pos);
if (vm_vec_dot(&collision_vec, &A->orient.vec.fvec) > 0.999f){
right_angle_vec = A->orient.vec.rvec;
} else {
vm_vec_cross(&right_angle_vec, &A->orient.vec.uvec, &collision_vec);
}
vm_vec_scale_add2( &A->phys_info.vel, &right_angle_vec, +2.0f);
vm_vec_scale_add2( &B->phys_info.vel, &right_angle_vec, -2.0f);
//nprintf(("AI", "A: [%6.3f %6.3f %6.3f] B: [%6.3f %6.3f %6.3f]\n", A->phys_info.vel.x, A->phys_info.vel.y, A->phys_info.vel.z, B->phys_info.vel.x, B->phys_info.vel.y, B->phys_info.vel.z));
return 0;
}
}
#endif
// nprintf(("AI", "Ship:ship collision: %s and %s.\n", Ships[A->instance].ship_name, Ships[B->instance].ship_name));
// Scale damage based on skill level for player.
if ((LightOne->flags & OF_PLAYER_SHIP) || (HeavyOne->flags & OF_PLAYER_SHIP)) {
damage *= (float) (Game_skill_level*Game_skill_level+1)/(NUM_SKILL_LEVELS+1);
} else if (Ships[LightOne->instance].team == Ships[HeavyOne->instance].team) {
// Decrease damage if non-player ships and not large.
// Looks dumb when fighters are taking damage from bumping into each other.
if ((LightOne->radius < 50.0f) && (HeavyOne->radius <50.0f)) {
damage /= 4.0f;
}
}
float dam2 = (100.0f * damage/LightOne->phys_info.mass);
int quadrant_num = get_ship_quadrant_from_global(&world_hit_pos, ship_ship_hit_info.heavy);
//nprintf(("AI", "Ship %s hit in quad #%i\n", Ships[ship_ship_hit_info.heavy->instance].ship_name, quadrant_num));
if ((ship_ship_hit_info.heavy->flags & OF_NO_SHIELDS) || !ship_is_shield_up(ship_ship_hit_info.heavy, quadrant_num) ) {
quadrant_num = -1;
}
ship_apply_local_damage(ship_ship_hit_info.heavy, ship_ship_hit_info.light, &world_hit_pos, 100.0f * damage/HeavyOne->phys_info.mass, quadrant_num, CREATE_SPARKS, ship_ship_hit_info.submodel_num, &ship_ship_hit_info.collision_normal);
hud_shield_quadrant_hit(ship_ship_hit_info.heavy, quadrant_num);
//nprintf(("AI", "Ship %s hit in quad #%i\n", Ships[ship_ship_hit_info.light->instance].ship_name, quadrant_num));
// don't draw sparks (using sphere hitpos)
ship_apply_local_damage(ship_ship_hit_info.light, ship_ship_hit_info.heavy, &world_hit_pos, dam2, MISS_SHIELDS, NO_SPARKS, -1, &ship_ship_hit_info.collision_normal);
hud_shield_quadrant_hit(ship_ship_hit_info.light, quadrant_num);
maybe_push_little_ship_from_fast_big_ship(ship_ship_hit_info.heavy, ship_ship_hit_info.light, ship_ship_hit_info.impulse, &ship_ship_hit_info.collision_normal);
//nprintf(("AI", "Damage to %s = %7.3f\n", Ships[LightOne->instance].ship_name, dam2));
return 0;
}
} else {
// estimate earliest time at which pair can hit
// cap ships warping in/out can exceed ship's expected velocity
// if ship is warping in, in stage 1, its velocity is 0, so make ship try to collide next frame
int sif_a_flags, sif_b_flags;
sif_a_flags = Ship_info[Ships[A->instance].ship_info_index].flags;
sif_b_flags = Ship_info[Ships[B->instance].ship_info_index].flags;
// if ship is huge and warping in or out
if ( (Ships[A->instance].flags & SF_ARRIVING_STAGE_1) && (sif_a_flags & (SIF_HUGE_SHIP))
||(Ships[B->instance].flags & SF_ARRIVING_STAGE_1) && (sif_b_flags & (SIF_HUGE_SHIP)) ) {
pair->next_check_time = timestamp(0); // check next time
return 0;
}
// get max of (1) max_vel.z, (2) 10, (3) afterburner_max_vel.z, (4) vel.z (for warping in ships exceeding expected max vel)
float shipA_max_speed, shipB_max_speed, time;
// get shipA max speed
if (ship_is_beginning_warpout_speedup(A)) {
shipA_max_speed = MAX(ship_get_max_speed(&Ships[A->instance]), ship_get_warpout_speed(A));
} else {
shipA_max_speed = ship_get_max_speed(&Ships[A->instance]);
}
// Maybe warping in or finished warping in with excessive speed
shipA_max_speed = MAX(shipA_max_speed, vm_vec_mag(&A->phys_info.vel));
shipA_max_speed = MAX(shipA_max_speed, 10.0f);
// get shipB max speed
if (ship_is_beginning_warpout_speedup(B)) {
shipB_max_speed = MAX(ship_get_max_speed(&Ships[B->instance]), ship_get_warpout_speed(B));
} else {
shipB_max_speed = ship_get_max_speed(&Ships[B->instance]);
}
// Maybe warping in or finished warping in with excessive speed
shipB_max_speed = MAX(shipB_max_speed, vm_vec_mag(&B->phys_info.vel));
shipB_max_speed = MAX(shipB_max_speed, 10.0f);
time = 1000.0f * (dist - A->radius - B->radius) / (shipA_max_speed + shipB_max_speed);
time -= 200.0f; // allow one frame slow frame at ~5 fps
if (time > 0) {
pair->next_check_time = timestamp( fl2i(time) );
} else {
pair->next_check_time = timestamp(0); // check next time
}
}
return 0;
}
void collect_ship_ship_physics_info(object *heavy, object *light, mc_info *mc_info, collision_info_struct *ship_ship_hit_info)
{
// slower moving object [A] is checked at its final position (polygon and position is found on obj)
// faster moving object [B] is reduced to a point and a ray is drawn from its last_pos to pos
// collision code returns hit position and normal on [A]
// estimate location on B that contacts A
// first find orientation of B relative to the normal it collides against.
// then find an approx hit location using the position hit on the bounding box
vec3d *r_heavy = &ship_ship_hit_info->r_heavy;
vec3d *r_light = &ship_ship_hit_info->r_light;
vec3d *heavy_collide_cm_pos = &ship_ship_hit_info->heavy_collision_cm_pos;
vec3d *light_collide_cm_pos = &ship_ship_hit_info->light_collision_cm_pos;
float core_rad = model_get_core_radius( Ships[light->instance].modelnum );
// get info needed for ship_ship_collision_physics
Assert(mc_info->hit_dist > 0);
// get light_collide_cm_pos
if ( !ship_ship_hit_info->submodel_rot_hit ) {
vec3d displacement;
vm_vec_sub(&displacement, mc_info->p1, mc_info->p0);
*light_collide_cm_pos = *mc_info->p0;
vm_vec_scale_add2(light_collide_cm_pos, &displacement, ship_ship_hit_info->hit_time);
}
// get r_light
vm_vec_sub(r_light, &ship_ship_hit_info->hit_pos, light_collide_cm_pos);
// Assert(vm_vec_mag(&r_light) > core_rad - 0.1);
float mag = float(fabs(vm_vec_mag(r_light) - core_rad));
if (mag > 0.1) {
nprintf(("Physics", "Framecount: %i |r_light - core_rad| > 0.1)\n", Framecount));
}
if (ship_ship_hit_info->edge_hit) {
// For an edge hit, just take the closest valid plane normal as the collision normal
vm_vec_copy_normalize(&ship_ship_hit_info->collision_normal, r_light);
vm_vec_negate(&ship_ship_hit_info->collision_normal);
}
// r dot n may not be negative if hit by moving model parts.
float dot = vm_vec_dotprod( r_light, &ship_ship_hit_info->collision_normal );
if ( dot > 0 )
{
nprintf(("Physics", "Framecount: %i r dot normal > 0\n", Framecount, dot));
}
vm_vec_zero(heavy_collide_cm_pos);
float q = vm_vec_dist(heavy_collide_cm_pos, light_collide_cm_pos) / (heavy->radius + core_rad);
if (q > 1.0f) {
nprintf(("Physics", "Warning: q = %f. Supposed to be <= 1.0.\n", q));
}
*r_heavy = ship_ship_hit_info->hit_pos;
// fill in ship_ship_hit_info
// ship_ship_hit_info->heavy_collision_cm_pos = heavy_collide_cm_pos;
// ship_ship_hit_info->light_collision_cm_pos = light_collide_cm_pos;
// ship_ship_hit_info->r_heavy = r_heavy;
// ship_ship_hit_info->r_light = r_light;
// sphere_sphere_case_handled separately
#ifdef COLLIDE_DEBUG
nprintf(("Physics", "Frame: %i %s info: last_pos: [%4.1f, %4.1f, %4.1f], collide_pos: [%4.1f, %4.1f %4.1f] vel: [%4.1f, %4.1f %4.1f]\n",
Framecount, Ships[heavy->instance].ship_name, heavy->last_pos.x, heavy->last_pos.y, heavy->last_pos.z,
heavy_collide_cm_pos.x, heavy_collide_cm_pos.y, heavy_collide_cm_pos.z,
heavy->phys_info.vel.x, heavy->phys_info.vel.y, heavy->phys_info.vel.z));
nprintf(("Physics", "Frame: %i %s info: last_pos: [%4.1f, %4.1f, %4.1f], collide_pos: [%4.1f, %4.1f, %4.1f] vel: [%4.1f, %4.1f, %4.1f]\n",
Framecount, Ships[light->instance].ship_name, light->last_pos.x, light->last_pos.y, light->last_pos.z,
light_collide_cm_pos.x, light_collide_cm_pos.y, light_collide_cm_pos.z,
light->phys_info.vel.x, light->phys_info.vel.y, light->phys_info.vel.z));
#endif
}
Reference in new issue View Git Blame Copy Permalink