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https://github.com/scp-fs2open/fs2open.github.com.git
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377 lines
8.9 KiB
C++
377 lines
8.9 KiB
C++
/*
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* Copyright (C) Volition, Inc. 1999. All rights reserved.
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*
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* All source code herein is the property of Volition, Inc. You may not sell
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* or otherwise commercially exploit the source or things you created based on the
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* source.
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*
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*/
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/*
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* $Logfile: /Freespace2/code/Starfield/Nebula.cpp $
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* $Revision: 2.8 $
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* $Date: 2005-04-05 05:53:25 $
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* $Author: taylor $
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*
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* Code to load & display nebulas
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*
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* $Log: not supported by cvs2svn $
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* Revision 2.7 2005/01/31 10:34:39 taylor
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* merge with Linux/OSX tree - p0131
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*
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* Revision 2.6 2004/07/26 20:47:53 Kazan
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* remove MCD complete
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*
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* Revision 2.5 2004/07/12 16:33:07 Kazan
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* MCD - define _MCD_CHECK to use memory tracking
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*
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* Revision 2.4 2004/03/05 09:02:07 Goober5000
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* Uber pass at reducing #includes
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* --Goober5000
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*
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* Revision 2.3 2004/02/15 06:02:32 bobboau
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* fixed sevral asorted matrix errors,
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* OGL people make sure I didn't break anything,
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* most of what I did was replaceing falses with (if graphicts_mode == D3D)
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*
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* Revision 2.2 2003/11/11 17:59:27 phreak
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* made some g3_start_instance_matrix calls not affect any of the HT&L graphics
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* calls since they were called for internal calculations for 2D stuff
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*
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* Revision 2.1 2002/08/01 01:41:10 penguin
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* The big include file move
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*
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* Revision 2.0 2002/06/03 04:02:29 penguin
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* Warpcore CVS sync
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*
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* Revision 1.2 2002/05/04 04:52:22 mharris
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* 1st draft at porting
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*
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* Revision 1.1 2002/05/02 18:03:13 mharris
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* Initial checkin - converted filenames and includes to lower case
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*
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*
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* 14 9/01/99 11:26p Dave
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* Fixed release build warnings.
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*
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* 13 8/30/99 5:01p Dave
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* Made d3d do less state changing in the nebula. Use new chat server for
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* PXO.
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*
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* 12 7/29/99 10:47p Dave
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* Standardized D3D fogging using vertex fog. Shook out Savage 4 bugs.
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*
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* 11 7/14/99 9:42a Dave
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* Put in clear_color debug function. Put in base for 3dnow stuff / P3
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* stuff
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*
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* 10 6/22/99 7:03p Dave
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* New detail options screen.
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*
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* 9 3/31/99 8:24p Dave
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* Beefed up all kinds of stuff, incluging beam weapons, nebula effects
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* and background nebulae. Added per-ship non-dimming pixel colors.
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*
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* 8 12/09/98 7:34p Dave
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* Cleanup up nebula effect. Tweaked many values.
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*
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* 7 12/08/98 9:36a Dave
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* Almost done nebula effect for D3D. Looks 85% as good as Glide.
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*
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* 6 12/07/98 5:51p Dave
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* Finally got d3d fog working! Now we just need to tweak values.
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*
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* 5 12/06/98 2:36p Dave
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* Drastically improved nebula fogging.
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*
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* 4 11/14/98 5:33p Dave
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* Lots of nebula work. Put in ship contrails.
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*
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* 3 11/11/98 5:37p Dave
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* Checkin for multiplayer testing.
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*
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* 2 10/07/98 10:54a Dave
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* Initial checkin.
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*
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* 1 10/07/98 10:51a Dave
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*
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* 15 5/13/98 2:53p John
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* Made subspace effect work under software. Had to add new inner loop to
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* tmapper. Added glows to end of subspace effect. Made subspace effect
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* levels use gamepalette-subspace palette.
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*
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* 14 4/10/98 5:20p John
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* Changed RGB in lighting structure to be ubytes. Removed old
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* not-necessary 24 bpp software stuff.
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*
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* 13 3/22/98 11:02a John
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* Made a bunch of the detail levels actually do something
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*
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* 12 2/22/98 12:19p John
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* Externalized some strings
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*
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* 11 1/23/98 5:08p John
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* Took L out of vertex structure used B (blue) instead. Took all small
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* fireballs out of fireball types and used particles instead. Fixed some
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* debris explosion things. Restructured fireball code. Restructured
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* some lighting code. Made dynamic lighting on by default. Made groups
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* of lasers only cast one light. Made fireballs not cast light.
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*
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* 10 1/10/98 1:14p John
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* Added explanation to debug console commands
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*
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* 9 12/21/97 4:33p John
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* Made debug console functions a class that registers itself
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* automatically, so you don't need to add the function to
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* debugfunctions.cpp.
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*
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* 8 11/25/97 11:40a Hoffoss
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* Added support for nebula placement editing.
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*
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* 7 11/24/97 12:04p John
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*
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* 6 11/21/97 2:55p Hoffoss
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* Added Nebula support to Fred. Implemented loading and saving nebula
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* info to/from mission files.
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*
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* 5 11/21/97 11:32a John
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* Added nebulas. Fixed some warpout bugs.
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*
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* 4 11/19/97 10:47p Adam
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* upped MAX_TRIS to 200. Whaddya think this is, I-War?
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*
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* 3 11/16/97 2:41p John
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* added a debug function to load a nebula into the game.
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*
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* 2 11/16/97 2:29p John
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* added versioning to nebulas; put nebula code into freespace.
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*
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* 1 11/16/97 1:14p John
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*
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* $NoKeywords: $
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*/
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#include "starfield/nebula.h"
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#include "math/vecmat.h"
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#include "render/3d.h"
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#include "mission/missionparse.h"
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#include "nebula/neb.h"
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#include "cfile/cfile.h"
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#define MAX_TRIS 200
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#define MAX_POINTS 300
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//static int neb_w = 0, neb_h = 0;
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//static int nebula_inited = 0;
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static int num_pts = 0;
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static vec3d nebula_vecs[MAX_POINTS];
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static vertex nebula_verts[MAX_POINTS];
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static float scale_factor = 1.0f;
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static int num_tris = 0;
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static int tri[MAX_TRIS][3];
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static int Nebula_loaded = 0;
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static angles Nebula_pbh;
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static matrix Nebula_orient;
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int Nebula_pitch;
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int Nebula_bank;
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int Nebula_heading;
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void nebula_close()
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{
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if (!Nebula_loaded) return;
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Nebula_loaded = 0;
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}
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#define NEBULA_FILE_ID NOX("NEBU")
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#define NEBULA_MAJOR_VERSION 1 // Can be 1-?
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#define NEBULA_MINOR_VERSION 0 // Can be 0-99
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// given:
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// u,v in range 0-1
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void project_2d_onto_sphere( vec3d *pnt, float u, float v )
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{
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float a,x,y,z,s;
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a = PI * (2.0f * u - 1.0f );
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z = 2.0f * v - 1.0f;
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s = scale_factor * fl_sqrt( 1.0f - z*z );
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x = s * (float)cos(a);
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y = s * (float)sin(a);
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pnt->xyz.x = x;
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pnt->xyz.y = y;
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pnt->xyz.z = z;
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}
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// Version 199 mean major version=1, minor=99.
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// Changing major means no longer compatible.
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// Revision history:
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// 1.00 - initial version
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// returns 0 if failed
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int load_nebula_sub(char *filename)
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{
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CFILE *fp;
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char id[16];
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int version, major, minor;
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fp = cfopen(filename, "rb");
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if ( !fp ) {
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return 0;
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}
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// ID of NEBU
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cfread( id, 4, 1, fp );
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if ( strncmp( id, NEBULA_FILE_ID, 4)) {
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mprintf(( "Not a valid nebula file.\n" ));
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return 0;
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}
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cfread( &version, sizeof(int), 1, fp );
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major = version / 100;
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minor = version % 100;
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if ( major != NEBULA_MAJOR_VERSION ) {
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mprintf(( "An out of date nebula file.\n" ));
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return 0;
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}
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cfread( &num_pts, sizeof(int), 1, fp );
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Assert( num_pts < MAX_POINTS );
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cfread( &num_tris, sizeof(int), 1, fp );
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Assert( num_tris < MAX_TRIS );
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int i;
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for (i=0; i<num_pts; i++ ) {
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float xf, yf;
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int l;
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cfread( &xf, sizeof(float), 1, fp );
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cfread( &yf, sizeof(float), 1, fp );
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cfread( &l, sizeof(int), 1, fp );
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project_2d_onto_sphere( &nebula_vecs[i], 1.0f - xf, yf );
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vm_vec_scale( &nebula_vecs[i], 10.0f );
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nebula_verts[i].b = ubyte((l*255)/31);
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// throw in some randomness to the nebula vertices depth
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}
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for (i=0; i<num_tris; i++ ) {
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cfread( &tri[i][0], sizeof(int), 1, fp );
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cfread( &tri[i][1], sizeof(int), 1, fp );
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cfread( &tri[i][2], sizeof(int), 1, fp );
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}
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cfclose(fp);
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return 1;
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}
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void nebula_init( char *filename, int pitch, int bank, int heading )
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{
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angles a;
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a.p = ANG_TO_RAD((float) pitch);
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a.b = ANG_TO_RAD((float) bank);
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a.h = ANG_TO_RAD((float) heading);
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nebula_init(filename, &a);
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}
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void nebula_init( char *filename, angles * pbh )
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{
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if ( Nebula_loaded ) {
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nebula_close();
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}
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if ( load_nebula_sub( cf_add_ext(filename, NOX(".neb")) ) ) {
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Nebula_loaded = 1;
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}
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if ( pbh ) {
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Nebula_pbh = *pbh;
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vm_angles_2_matrix(&Nebula_orient, &Nebula_pbh );
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} else {
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Nebula_pbh.p = 0.0f;
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Nebula_pbh.b = 0.0f;
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Nebula_pbh.h = 0.0f;
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Nebula_orient = vmd_identity_matrix;
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}
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}
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void nebula_render()
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{
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int i;
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// int r, g, b;
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// no nebula for you!
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return;
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if ( !Nebula_loaded ) {
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return;
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}
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if ( !Detail.planets_suns ) {
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return;
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}
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// Rotate the nebula.
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g3_start_instance_matrix( NULL, &Nebula_orient, (gr_screen.mode == GR_DIRECT3D));
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for (i=0; i<num_pts; i++ ) {
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g3_rotate_faraway_vertex( &nebula_verts[i], &nebula_vecs[i] );
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g3_project_vertex( &nebula_verts[i] );
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}
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int saved_gr_zbuffering = gr_zbuffer_get();
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gr_zbuffer_set(GR_ZBUFF_NONE);
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for (i=0; i<num_tris; i++ ) {
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vertex * verts[3];
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verts[0] = &nebula_verts[tri[i][0]];
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verts[1] = &nebula_verts[tri[i][1]];
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verts[2] = &nebula_verts[tri[i][2]];
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g3_draw_poly(3, verts, TMAP_FLAG_RAMP | TMAP_FLAG_GOURAUD | TMAP_FLAG_NEBULA );
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}
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g3_done_instance((gr_screen.mode == GR_DIRECT3D));
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gr_zbuffer_set(saved_gr_zbuffering);
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// always switch off fogging for good measure
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if((The_mission.flags & MISSION_FLAG_FULLNEB) && (Neb2_render_mode == NEB2_RENDER_NONE)){
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gr_fog_set(GR_FOGMODE_NONE, 0, 0, 0);
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}
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}
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DCF(nebula,"Loads a different nebula")
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{
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if ( Dc_command ) {
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dc_get_arg(ARG_STRING|ARG_NONE);
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if ( Dc_arg_type == ARG_NONE ) {
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nebula_close();
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} else {
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nebula_init( Dc_arg );
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}
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}
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if ( Dc_help ) {
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dc_printf( "Usage: nebula filename\nLoads the nebula file. No filename takes away nebula\n" );
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}
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}
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