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scummvm/engines/sword2/router.cpp

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/* Copyright (C) 1994-1998 Revolution Software Ltd.
* Copyright (C) 2003-2006 The ScummVM project
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*/
#include "common/stdafx.h"
#include "common/stream.h"
#include "sword2/sword2.h"
#include "sword2/defs.h"
#include "sword2/header.h"
#include "sword2/logic.h"
#include "sword2/resman.h"
#include "sword2/router.h"
#include "sword2/screen.h"
namespace Sword2 {
// ---------------------------------------------------------------------------
// ROUTER.CPP by James
//
// A rehash of Jeremy's original jrouter.c, containing low-level system
// routines for calculating routes between points inside a walk-grid, and
// constructing walk animations from mega-sets.
//
// jrouter.c underwent 2 major reworks from the original:
// (1) Restructured to allow more flexibility in the mega-sets, ie. more info
// taken from the walk-data
// - the new George & Nico mega-sets & walk-data were then tested &
// tweaked in the Sword1 system
// (2) Updated for the new Sword2 system, ie. new object structures
// - now compatible with Sword2, the essential code already having been
// tested
//
// ---------------------------------------------------------------------------
/****************************************************************************
* JROUTER.C polygon router with modular walks
* using a tree of modules
* 21 july 94
* 3 november 94
* System currently works by scanning grid data and coming up with a ROUTE
* as a series of way points(nodes), the smoothest eight directional PATH
* through these nodes is then found, and a WALK created to fit the PATH.
*
* Two funtions are called by the user, RouteFinder creates a route as a
* module list, HardWalk creates an animation list from the module list.
* The split is only provided to allow the possibility of turning the
* autorouter over two game cycles.
****************************************************************************
*
* Routine timings on osborne 486
*
* Read floor resource (file already loaded) 112 pixels
*
* Read mega resource (file already loaded) 112 pixels
*
*
*
****************************************************************************
*
* Modified 12 Oct 95
*
* Target Points within 1 pixel of a line are ignored ???
*
* Modules split into Points within 1 pixel of a line are ignored ???
*
****************************************************************************
*
* TOTALLY REHASHED BY JAMES FOR NEW MEGAS USING OLD SYSTEM
* THEN REINCARNATED BY JAMES FOR NEW MEGAS USING NEW SYSTEM
*
****************************************************************************/
//----------------------------------------------------------
// (4) WALK-GRID FILES
//----------------------------------------------------------
// a walk-grid file consists of:
//
// standard file header
// walk-grid file header
// walk-grid data
// Walk-Grid Header - taken directly from old "header.h" in STD_INC
struct WalkGridHeader {
int32 numBars; // number of bars on the floor
int32 numNodes; // number of nodes
};
uint8 Router::returnSlotNo(uint32 megaId) {
if (_vm->_logic->readVar(ID) == CUR_PLAYER_ID) {
// George (8)
return 0;
} else {
// One of Nico's mega id's
return 1;
}
}
void Router::allocateRouteMem() {
uint8 slotNo;
// Player character always always slot 0, while the other mega
// (normally Nico) always uses slot 1
// Better this way, so that if mega object removed from memory while
// in middle of route, the old route will be safely cleared from
// memory just before they create a new one
slotNo = returnSlotNo(_vm->_logic->readVar(ID));
// if this slot is already used, then it can't be needed any more
// because this id is creating a new route!
if (_routeSlots[slotNo])
freeRouteMem();
_routeSlots[slotNo] = (WalkData *)malloc(sizeof(WalkData) * O_WALKANIM_SIZE);
// 12000 bytes were used for this in Sword1 mega compacts, based on
// 20 bytes per 'WalkData' frame
// ie. allowing for 600 frames including end-marker
// Now 'WalkData' is 8 bytes, so 8*600 = 4800 bytes.
// Note that a 600 frame walk lasts about 48 seconds!
// (600fps / 12.5s = 48s)
// mega keeps note of which slot contains the pointer to it's walk
// animation mem block
// +1 so that '0' can mean "not walking"
// megaObject->route_slot_id = slotNo + 1;
}
WalkData *Router::getRouteMem() {
uint8 slotNo = returnSlotNo(_vm->_logic->readVar(ID));
return (WalkData *)_routeSlots[slotNo];
}
void Router::freeRouteMem() {
uint8 slotNo = returnSlotNo(_vm->_logic->readVar(ID));
free(_routeSlots[slotNo]);
_routeSlots[slotNo] = NULL;
}
void Router::freeAllRouteMem() {
for (int i = 0; i < TOTAL_ROUTE_SLOTS; i++) {
free(_routeSlots[i]);
_routeSlots[i] = NULL;
}
}
int32 Router::routeFinder(byte *ob_mega, byte *ob_walkdata, int32 x, int32 y, int32 dir) {
/*********************************************************************
* RouteFinder.C polygon router with modular walks
* 21 august 94
* 3 november 94
* routeFinder creates a list of modules that enables HardWalk to
* create an animation list.
*
* routeFinder currently works by scanning grid data and coming up
* with a ROUTE as a series of way points(nodes), the smoothest eight
* directional PATH through these nodes is then found, this
* information is made available to HardWalk for a WALK to be created
* to fit the PATH.
*
* 30 november 94 return values modified
*
* return 0 = failed to find a route
*
* 1 = found a route
*
* 2 = mega already at target
*
*********************************************************************/
int32 routeFlag = 0;
int32 solidFlag = 0;
WalkData *walkAnim;
// megaId = id;
setUpWalkGrid(ob_mega, x, y, dir);
loadWalkData(ob_walkdata);
walkAnim = getRouteMem();
// All route data now loaded start finding a route
// Check if we can get a route through the floor. changed 12 Oct95 JPS
routeFlag = getRoute();
switch (routeFlag) {
case 2:
// special case for zero length route
// if target direction specified as any
if (_targetDir > 7)
_targetDir = _startDir;
// just a turn on the spot is required set an end module for
// the route let the animator deal with it
// modularPath is normally set by extractRoute
_modularPath[0].dir = _startDir;
_modularPath[0].num = 0;
_modularPath[0].x = _startX;
_modularPath[0].y = _startY;
_modularPath[1].dir = _targetDir;
_modularPath[1].num = 0;
_modularPath[1].x = _startX;
_modularPath[1].y = _startY;
_modularPath[2].dir = 9;
_modularPath[2].num = ROUTE_END_FLAG;
slidyWalkAnimator(walkAnim);
routeFlag = 2;
break;
case 1:
// A normal route. Convert the route to an exact path
smoothestPath();
// The Route had waypoints and direction options
// The Path is an exact set of lines in 8 directions that
// reach the target.
// The path is in module format, but steps taken in each
// direction are not accurate
// if target dir = 8 then the walk isn't linked to an anim so
// we can create a route without sliding and miss the exact
// target
#ifndef FORCE_SLIDY
if (_targetDir == 8) {
// can end facing ANY direction (ie. exact end
// position not vital) - so use SOLID walk to
// avoid sliding to exact position
solidPath();
solidFlag = solidWalkAnimator(walkAnim);
}
#endif
if (!solidFlag) {
// if we failed to create a SOLID route, do a SLIDY
// one instead
slidyPath();
slidyWalkAnimator(walkAnim);
}
break;
default:
// Route didn't reach target so assume point was off the floor
// routeFlag = 0;
break;
}
return routeFlag; // send back null route
}
int32 Router::getRoute() {
/*********************************************************************
* GetRoute.C extract a path from walk grid
* 12 october 94
*
* GetRoute currently works by scanning grid data and coming up with
* a ROUTE as a series of way points(nodes).
*
* static routeData _route[O_ROUTE_SIZE];
*
* return 0 = failed to find a route
*
* 1 = found a route
*
* 2 = mega already at target
*
* 3 = failed to find a route because target was on a line
*
*********************************************************************/
int32 routeGot = 0;
if (_startX == _targetX && _startY == _targetY)
routeGot = 2;
else {
// 'else' added by JEL (23jan96) otherwise 'routeGot' affected
// even when already set to '2' above - causing some 'turns'
// to walk downwards on the spot
// returns 3 if target on a line ( +- 1 pixel )
routeGot = checkTarget(_targetX, _targetY);
}
if (routeGot == 0) {
// still looking for a route check if target is within a pixel
// of a line
// scan through the nodes linking each node to its nearest
// neighbour until no more nodes change
// This is the routine that finds a route using scan()
int32 level = 1;
while (scan(level))
level++;
// Check to see if the route reached the target
if (_node[_nNodes].dist < 9999) {
// it did so extract the route as nodes and the
// directions to go between each node
routeGot = 1;
extractRoute();
// route.X,route.Y and route.Dir now hold all the
// route infomation with the target dir or route
// continuation
}
}
return routeGot;
}
// THE SLIDY PATH ROUTINES
int32 Router::smoothestPath() {
// This is the second big part of the route finder and the the only
// bit that tries to be clever (the other bits are clever).
//
// This part of the autorouter creates a list of modules from a set of
// lines running across the screen. The task is complicated by two
// things:
//
// Firstly in choosing a route through the maze of nodes the routine
// tries to minimise the amount of each individual turn avoiding 90
// degree and greater turns (where possible) and reduces the total
// number of turns (subject to two 45 degree turns being better than
// one 90 degree turn).
//
// Secondly when walking in a given direction the number of steps
// required to reach the end of that run is not calculated accurately.
// This is because I was unable to derive a function to relate number
// of steps taken between two points to the shrunken step size
int i;
int32 steps = 0;
int32 lastDir;
int32 tempturns[4];
int32 turns[4];
const int32 turntable[NO_DIRECTIONS] = { 0, 1, 3, 5, 7, 5, 3, 1 };
// route.X route.Y and route.Dir start at far end
_smoothPath[0].x = _startX;
_smoothPath[0].y = _startY;
_smoothPath[0].dir = _startDir;
_smoothPath[0].num = 0;
lastDir = _startDir;
// for each section of the route
for (int p = 0; p < _routeLength; p++) {
int32 dirS = _route[p].dirS;
int32 dirD = _route[p].dirD;
int32 nextDirS = _route[p + 1].dirS;
int32 nextDirD = _route[p + 1].dirD;
// Check directions into and out of a pair of nodes going in
int32 dS = dirS - lastDir;
if (dS < 0)
dS = dS + NO_DIRECTIONS;
int32 dD = dirD - lastDir;
if (dD < 0)
dD = dD + NO_DIRECTIONS;
// coming out
int32 dSS = dirS - nextDirS;
if (dSS < 0)
dSS = dSS + NO_DIRECTIONS;
int32 dDD = dirD - nextDirD;
if (dDD < 0)
dDD = dDD + NO_DIRECTIONS;
int32 dSD = dirS - nextDirD;
if (dSD < 0)
dSD = dSD + NO_DIRECTIONS;
int32 dDS = dirD - nextDirS;
if (dDS < 0)
dDS = dDS + NO_DIRECTIONS;
// Determine the amount of turning involved in each possible path
dS = turntable[dS];
dD = turntable[dD];
dSS = turntable[dSS];
dDD = turntable[dDD];
dSD = turntable[dSD];
dDS = turntable[dDS];
// get the best path out ie assume next section uses best direction
if (dSD < dSS)
dSS = dSD;
if (dDS < dDD)
dDD = dDS;
// Rate each option. Split routes look crap so weight against them
tempturns[0] = dS + dSS + 3;
turns[0] = 0;
tempturns[1] = dS + dDD;
turns[1] = 1;
tempturns[2] = dD + dSS;
turns[2] = 2;
tempturns[3] = dD + dDD + 3;
turns[3] = 3;
// set up turns as a sorted array of the turn values
for (i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
if (tempturns[j] > tempturns[j + 1]) {
SWAP(turns[j], turns[j + 1]);
SWAP(tempturns[j], tempturns[j + 1]);
}
}
}
// best option matched in order of the priority we would like
// to see on the screen but each option must be checked to see
// if it can be walked
int32 options = newCheck(1, _route[p].x, _route[p].y, _route[p + 1].x, _route[p + 1].y);
assert(options);
i = 0;
steps = 0;
do {
int32 opt = 1 << turns[i];
if (options & opt)
steps = smoothCheck(turns[i], p, dirS, dirD);
i++;
} while (steps == 0 && i < 4);
assert(steps);
// route.X route.Y route.dir and bestTurns start at far end
}
// best turns will end heading as near as possible to target dir rest
// is down to anim for now
_smoothPath[steps].dir = 9;
_smoothPath[steps].num = ROUTE_END_FLAG;
return 1;
}
int32 Router::smoothCheck(int32 best, int32 p, int32 dirS, int32 dirD) {
/*********************************************************************
* Slip sliding away
* This path checker checks to see if a walk that exactly follows the
* path would be valid. This should be inherently true for atleast one
* of the turn options.
* No longer checks the data it only creates the smoothPath array JPS
*********************************************************************/
// FIXME: Using 'static' vars in a method is evil -- they should almost
// always be turned into member variables instead.
static int32 k;
int32 dsx, dsy;
int32 ddx, ddy;
int32 ss0, ss1, ss2;
int32 sd0, sd1, sd2;
if (p == 0)
k = 1;
int32 x = _route[p].x;
int32 y = _route[p].y;
int32 x2 = _route[p + 1].x;
int32 y2 = _route[p + 1].y;
int32 ldx = x2 - x;
int32 ldy = y2 - y;
int32 dirX = 1;
int32 dirY = 1;
if (ldx < 0) {
ldx = -ldx;
dirX = -1;
}
if (ldy < 0) {
ldy = -ldy;
dirY = -1;
}
// set up sd0-ss2 to reflect possible movement in each direction
if (dirS == 0 || dirS == 4) { // vert and diag
ddx = ldx;
ddy = (ldx * _diagonaly) / _diagonalx;
dsy = ldy - ddy;
ddx = ddx * dirX;
ddy = ddy * dirY;
dsy = dsy * dirY;
dsx = 0;
sd0 = (ddx + _modX[dirD] / 2) / _modX[dirD];
ss0 = (dsy + _modY[dirS] / 2) / _modY[dirS];
sd1 = sd0 / 2;
ss1 = ss0 / 2;
sd2 = sd0 - sd1;
ss2 = ss0 - ss1;
} else {
ddy = ldy;
ddx = (ldy * _diagonalx) / _diagonaly;
dsx = ldx - ddx;
ddy = ddy * dirY;
ddx = ddx * dirX;
dsx = dsx * dirX;
dsy = 0;
sd0 = (ddy + _modY[dirD] / 2) / _modY[dirD];
ss0 = (dsx + _modX[dirS] / 2) / _modX[dirS];
sd1 = sd0 / 2;
ss1 = ss0 / 2;
sd2 = sd0 - sd1;
ss2 = ss0 - ss1;
}
switch (best) {
case 0: // halfsquare, diagonal, halfsquare
_smoothPath[k].x = x + dsx / 2;
_smoothPath[k].y = y + dsy / 2;
_smoothPath[k].dir = dirS;
_smoothPath[k].num = ss1;
k++;
_smoothPath[k].x = x + dsx / 2 + ddx;
_smoothPath[k].y = y + dsy / 2 + ddy;
_smoothPath[k].dir = dirD;
_smoothPath[k].num = sd0;
k++;
_smoothPath[k].x = x + dsx + ddx;
_smoothPath[k].y = y + dsy + ddy;
_smoothPath[k].dir = dirS;
_smoothPath[k].num = ss2;
k++;
break;
case 1: // square, diagonal
_smoothPath[k].x = x + dsx;
_smoothPath[k].y = y + dsy;
_smoothPath[k].dir = dirS;
_smoothPath[k].num = ss0;
k++;
_smoothPath[k].x = x2;
_smoothPath[k].y = y2;
_smoothPath[k].dir = dirD;
_smoothPath[k].num = sd0;
k++;
break;
case 2: // diagonal square
_smoothPath[k].x = x + ddx;
_smoothPath[k].y = y + ddy;
_smoothPath[k].dir = dirD;
_smoothPath[k].num = sd0;
k++;
_smoothPath[k].x = x2;
_smoothPath[k].y = y2;
_smoothPath[k].dir = dirS;
_smoothPath[k].num = ss0;
k++;
break;
default: // halfdiagonal, square, halfdiagonal
_smoothPath[k].x = x + ddx / 2;
_smoothPath[k].y = y + ddy / 2;
_smoothPath[k].dir = dirD;
_smoothPath[k].num = sd1;
k++;
_smoothPath[k].x = x + dsx + ddx / 2;
_smoothPath[k].y = y + dsy + ddy / 2;
_smoothPath[k].dir = dirS;
_smoothPath[k].num = ss0;
k++;
_smoothPath[k].x = x2;
_smoothPath[k].y = y2;
_smoothPath[k].dir = dirD;
_smoothPath[k].num = sd2;
k++;
break;
}
return k;
}
void Router::slidyPath() {
/*********************************************************************
* slidyPath creates a path based on part steps with no sliding to get
* as near as possible to the target without any sliding this routine
* is intended for use when just clicking about.
*
* produce a module list from the line data
*********************************************************************/
int32 smooth = 1;
int32 slidy = 1;
// strip out the short sections
_modularPath[0].x = _smoothPath[0].x;
_modularPath[0].y = _smoothPath[0].y;
_modularPath[0].dir = _smoothPath[0].dir;
_modularPath[0].num = 0;
while (_smoothPath[smooth].num < ROUTE_END_FLAG) {
int32 scale = _scaleA * _smoothPath[smooth].y + _scaleB;
int32 deltaX = _smoothPath[smooth].x - _modularPath[slidy - 1].x;
int32 deltaY = _smoothPath[smooth].y - _modularPath[slidy - 1].y;
// quarter a step minimum
int32 stepX = (scale * _modX[_smoothPath[smooth].dir]) >> 19;
int32 stepY = (scale * _modY[_smoothPath[smooth].dir]) >> 19;
if (ABS(deltaX) >= ABS(stepX) && ABS(deltaY) >= ABS(stepY)) {
_modularPath[slidy].x = _smoothPath[smooth].x;
_modularPath[slidy].y = _smoothPath[smooth].y;
_modularPath[slidy].dir = _smoothPath[smooth].dir;
_modularPath[slidy].num = 1;
slidy++;
}
smooth++;
}
// in case the last bit had no steps
if (slidy > 1) {
_modularPath[slidy - 1].x = _smoothPath[smooth - 1].x;
_modularPath[slidy - 1].y = _smoothPath[smooth - 1].y;
}
// set up the end of the walk
_modularPath[slidy].x = _smoothPath[smooth - 1].x;
_modularPath[slidy].y = _smoothPath[smooth - 1].y;
_modularPath[slidy].dir = _targetDir;
_modularPath[slidy].num = 0;
slidy++;
_modularPath[slidy].x = _smoothPath[smooth - 1].x;
_modularPath[slidy].y = _smoothPath[smooth - 1].y;
_modularPath[slidy].dir = 9;
_modularPath[slidy].num = ROUTE_END_FLAG;
}
// SLOW IN
bool Router::addSlowInFrames(WalkData *walkAnim) {
if (_walkData.usingSlowInFrames && _modularPath[1].num > 0) {
for (int slowInFrameNo = 0; slowInFrameNo < _walkData.nSlowInFrames[_currentDir]; slowInFrameNo++) {
walkAnim[_stepCount].frame = _firstSlowInFrame[_currentDir] + slowInFrameNo;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = _currentDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
}
return true;
}
return false;
}
void Router::earlySlowOut(byte *ob_mega, byte *ob_walkdata) {
int32 slowOutFrameNo;
int32 walk_pc;
WalkData *walkAnim;
ObjectMega obMega(ob_mega);
debug(5, "EARLY SLOW-OUT");
loadWalkData(ob_walkdata);
debug(5, "********************************");
debug(5, "_framesPerStep = %d", _framesPerStep);
debug(5, "_numberOfSlowOutFrames = %d", _numberOfSlowOutFrames);
debug(5, "_firstWalkingTurnLeftFrame = %d", _firstWalkingTurnLeftFrame);
debug(5, "_firstWalkingTurnRightFrame = %d", _firstWalkingTurnRightFrame);
debug(5, "_firstSlowOutFrame = %d", _firstSlowOutFrame);
debug(5, "********************************");
walk_pc = obMega.getWalkPc();
walkAnim = getRouteMem();
// if this mega does actually have slow-out frames
if (_walkData.usingSlowOutFrames) {
// overwrite the next step (half a cycle) of the walk
// (ie .step - 0..5)
do {
debug(5, "STEP NUMBER: walkAnim[%d].step = %d", walk_pc, walkAnim[walk_pc].step);
debug(5, "ORIGINAL FRAME: walkAnim[%d].frame = %d", walk_pc, walkAnim[walk_pc].frame);
// map from existing walk frame across to correct
// frame number of slow-out - remember, there may be
// more slow-out frames than walk-frames!
if (walkAnim[walk_pc].frame >= _firstWalkingTurnRightFrame) {
// if it's a walking turn-right, rather than a
// normal step, then map it to a normal step
// frame first
walkAnim[walk_pc].frame -= _firstWalkingTurnRightFrame;
debug(5, "MAPPED TO WALK: walkAnim[%d].frame = %d (walking turn-right frame --> walk frame)", walk_pc, walkAnim[walk_pc].frame);
} else if (walkAnim[walk_pc].frame >= _firstWalkingTurnLeftFrame) {
// if it's a walking turn-left, rather than a
// normal step, then map it to a normal step
// frame first
walkAnim[walk_pc].frame -= _firstWalkingTurnLeftFrame;
debug(5, "MAPPED TO WALK: walkAnim[%d].frame = %d (walking turn-left frame --> walk frame)", walk_pc, walkAnim[walk_pc].frame);
}
walkAnim[walk_pc].frame += _firstSlowOutFrame + ((walkAnim[walk_pc].frame / _framesPerStep) * (_numberOfSlowOutFrames - _framesPerStep));
walkAnim[walk_pc].step = 0;
debug(5, "SLOW-OUT FRAME: walkAnim[%d].frame = %d",walk_pc, walkAnim[walk_pc].frame);
walk_pc++;
} while (walkAnim[walk_pc].step > 0);
// add stationary frame(s) (OPTIONAL)
for (slowOutFrameNo = _framesPerStep; slowOutFrameNo < _numberOfSlowOutFrames; slowOutFrameNo++) {
walkAnim[walk_pc].frame = walkAnim[walk_pc - 1].frame + 1;
debug(5, "EXTRA FRAME: walkAnim[%d].frame = %d", walk_pc, walkAnim[walk_pc].frame);
walkAnim[walk_pc].step = 0;
walkAnim[walk_pc].dir = walkAnim[walk_pc - 1].dir;
walkAnim[walk_pc].x = walkAnim[walk_pc - 1].x;
walkAnim[walk_pc].y = walkAnim[walk_pc - 1].y;
walk_pc++;
}
} else {
// this mega doesn't have slow-out frames
// stand in current direction
walkAnim[walk_pc].frame = _firstStandFrame + walkAnim[walk_pc - 1].dir;
walkAnim[walk_pc].step = 0;
walkAnim[walk_pc].dir = walkAnim[walk_pc - 1].dir;
walkAnim[walk_pc].x = walkAnim[walk_pc - 1].x;
walkAnim[walk_pc].y = walkAnim[walk_pc - 1].y;
walk_pc++;
}
// end of sequence
walkAnim[walk_pc].frame = 512;
// so that this doesn't happen again while 'george_walking' is still
// '2'
walkAnim[walk_pc].step = 99;
}
// SLOW OUT
void Router::addSlowOutFrames(WalkData *walkAnim) {
int32 slowOutFrameNo;
// if the mega did actually walk, we overwrite the last step (half a
// cycle) with slow-out frames + add any necessary stationary frames
if (_walkData.usingSlowOutFrames && _lastCount >= _framesPerStep) {
// place stop frames here
// slowdown at the end of the last walk
slowOutFrameNo = _lastCount - _framesPerStep;
debug(5, "SLOW OUT: slowOutFrameNo(%d) = _lastCount(%d) - _framesPerStep(%d)", slowOutFrameNo, _lastCount, _framesPerStep);
// overwrite the last step (half a cycle) of the walk
do {
// map from existing walk frame across to correct
// frame number of slow-out - remember, there may be
// more slow-out frames than walk-frames!
walkAnim[slowOutFrameNo].frame += _firstSlowOutFrame + ((walkAnim[slowOutFrameNo].frame / _framesPerStep) * (_numberOfSlowOutFrames - _framesPerStep));
// because no longer a normal walk-step
walkAnim[slowOutFrameNo].step = 0;
debug(5, "walkAnim[%d].frame = %d",slowOutFrameNo,walkAnim[slowOutFrameNo].frame);
slowOutFrameNo++;
} while (slowOutFrameNo < _lastCount);
// add stationary frame(s) (OPTIONAL)
for (slowOutFrameNo = _framesPerStep; slowOutFrameNo < _numberOfSlowOutFrames; slowOutFrameNo++) {
walkAnim[_stepCount].frame = walkAnim[_stepCount - 1].frame + 1;
debug(5, "EXTRA FRAMES: walkAnim[%d].frame = %d", _stepCount, walkAnim[_stepCount].frame);
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = walkAnim[_stepCount - 1].dir;
walkAnim[_stepCount].x = walkAnim[_stepCount - 1].x;
walkAnim[_stepCount].y = walkAnim[_stepCount - 1].y;
_stepCount++;
}
}
}
void Router::slidyWalkAnimator(WalkData *walkAnim) {
/*********************************************************************
* Skidding every where HardWalk creates an animation that exactly
* fits the smoothPath and uses foot slipping to fit whole steps into
* the route
*
* Parameters: georgeg, mouseg
* Returns: rout
*
* produce a module list from the line data
*********************************************************************/
// FIXME: Using 'static' vars in a method is evil -- they should almost
// always be turned into member variables instead.
static int32 left = 0;
int32 p;
int32 lastDir;
int32 lastRealDir;
int32 turnDir;
int32 scale;
int32 step;
int32 module;
int32 moduleEnd;
int32 module16X;
int32 module16Y;
int32 stepX;
int32 stepY;
int32 errorX;
int32 errorY;
int32 lastErrorX;
int32 lastErrorY;
int32 frameCount;
int32 frames;
p = 0;
lastDir = _modularPath[0].dir;
_currentDir = _modularPath[1].dir;
if (_currentDir == NO_DIRECTIONS)
_currentDir = lastDir;
_moduleX = _startX;
_moduleY = _startY;
module16X = _moduleX << 16;
module16Y = _moduleY << 16;
_stepCount = 0;
// START THE WALK WITH THE FIRST STANDFRAME THIS MAY CAUSE A DELAY
// BUT IT STOPS THE PLAYER MOVING FOR COLLISIONS ARE DETECTED
debug(5, "SLIDY: STARTING THE WALK");
module = _framesPerChar + lastDir;
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
// TURN TO START THE WALK
debug(5, "SLIDY: TURNING TO START THE WALK");
// rotate if we need to
if (lastDir != _currentDir) {
// get the direction to turn
turnDir = _currentDir - lastDir;
if (turnDir < 0)
turnDir += NO_DIRECTIONS;
if (turnDir > 4)
turnDir = -1;
else if (turnDir > 0)
turnDir = 1;
// rotate to new walk direction
// for george and nico put in a head turn at the start
if (_walkData.usingStandingTurnFrames) {
// new frames for turn frames 29oct95jps
if (turnDir < 0)
module = _firstStandingTurnLeftFrame + lastDir;
else
module = _firstStandingTurnRightFrame + lastDir;
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
}
// rotate till were facing new dir then go back 45 degrees
while (lastDir != _currentDir) {
lastDir += turnDir;
// new frames for turn frames 29oct95jps
if (turnDir < 0) {
if ( lastDir < 0)
lastDir += NO_DIRECTIONS;
module = _firstStandingTurnLeftFrame + lastDir;
} else {
if ( lastDir > 7)
lastDir -= NO_DIRECTIONS;
module = _firstStandingTurnRightFrame + lastDir;
}
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
}
// the back 45 degrees bit
// step back one because new head turn for george takes us
// past the new dir
_stepCount--;
}
// his head is in the right direction
lastRealDir = _currentDir;
// SLIDY: THE SLOW IN
addSlowInFrames(walkAnim);
// THE WALK
debug(5, "SLIDY: THE WALK");
// start the walk on the left or right leg, depending on how the
// slow-in frames were drawn
// (0 = left; 1 = right)
if (_walkData.leadingLeg[_currentDir] == 0) {
// start the walk on the left leg (ie. at beginning of the
// first step of the walk cycle)
left = 0;
} else {
// start the walk on the right leg (ie. at beginning of the
// second step of the walk cycle)
left = _framesPerStep;
}
_lastCount = _stepCount;
// this ensures that we don't put in turn frames for the start
lastDir = 99;
// this ensures that we don't put in turn frames for the start
_currentDir = 99;
do {
assert(_stepCount < O_WALKANIM_SIZE);
while (_modularPath[p].num == 0) {
p++;
if (_currentDir != 99)
lastRealDir = _currentDir;
lastDir = _currentDir;
_lastCount = _stepCount;
}
// calculate average amount to lose in each step on the way
// to the next node
_currentDir = _modularPath[p].dir;
if (_currentDir < NO_DIRECTIONS) {
module = _currentDir * _framesPerStep * 2 + left;
if (left == 0)
left = _framesPerStep;
else
left = 0;
moduleEnd = module + _framesPerStep;
step = 0;
scale = (_scaleA * _moduleY + _scaleB);
do {
module16X += _walkData.dx[module] * scale;
module16Y += _walkData.dy[module] * scale;
_moduleX = module16X >> 16;
_moduleY = module16Y >> 16;
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = step; // normally 0,1,2,3,4,5,0,1,2,etc
walkAnim[_stepCount].dir = _currentDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
step++;
module++;
} while (module < moduleEnd);
stepX = _modX[_modularPath[p].dir];
stepY = _modY[_modularPath[p].dir];
errorX = _modularPath[p].x - _moduleX;
errorX = errorX * stepX;
errorY = _modularPath[p].y - _moduleY;
errorY = errorY * stepY;
if (errorX < 0 || errorY < 0) {
_modularPath[p].num = 0; // the end of the path
// okay those last steps took us past our
// target but do we want to scoot or moonwalk
frames = _stepCount - _lastCount;
errorX = _modularPath[p].x - walkAnim[_stepCount - 1].x;
errorY = _modularPath[p].y - walkAnim[_stepCount - 1].y;
if (frames > _framesPerStep) {
lastErrorX = _modularPath[p].x - walkAnim[_stepCount - 7].x;
lastErrorY = _modularPath[p].y - walkAnim[_stepCount - 7].y;
if (stepX == 0) {
if (3 * ABS(lastErrorY) < ABS(errorY)) {
// the last stop was
// closest
_stepCount -= _framesPerStep;
if (left == 0)
left = _framesPerStep;
else
left = 0;
}
} else {
if (3 * ABS(lastErrorX) < ABS(errorX)) {
//the last stop was
// closest
_stepCount -= _framesPerStep;
if (left == 0)
left = _framesPerStep;
else
left = 0;
}
}
}
errorX = _modularPath[p].x - walkAnim[_stepCount-1].x;
errorY = _modularPath[p].y - walkAnim[_stepCount-1].y;
// okay we've reached the end but we still
// have an error
if (errorX != 0) {
frameCount = 0;
frames = _stepCount - _lastCount;
do {
frameCount++;
walkAnim[_lastCount + frameCount - 1].x += errorX * frameCount / frames;
} while (frameCount < frames);
}
if (errorY != 0) {
frameCount = 0;
frames = _stepCount - _lastCount;
do {
frameCount++;
walkAnim[_lastCount + frameCount - 1].y += errorY * frameCount / frames;
} while (frameCount < frames);
}
// Now is the time to put in the turn frames
// for the last turn
if (frames < _framesPerStep) {
// this ensures that we don't put in
// turn frames for this walk or the
// next
_currentDir = 99;
}
if (_currentDir != 99)
lastRealDir = _currentDir;
// check each turn condition in turn
// only for george
if (lastDir != 99 && _currentDir != 99 && _walkData.usingWalkingTurnFrames) {
// 1 and -7 going right -1 and 7 going
// left
lastDir = _currentDir - lastDir;
if (lastDir == -1 || lastDir == 7 || lastDir == -2 || lastDir == 6) {
// turn at the end of the last
// walk
_frame = _lastCount - _framesPerStep;
do {
// turning left
walkAnim[_frame].frame += _firstWalkingTurnLeftFrame;
_frame++;
} while (_frame < _lastCount);
} else if (lastDir == 1 || lastDir == -7 || lastDir == 2 || lastDir == -6) {
// turn at the end of the
// current walk
_frame = _lastCount - _framesPerStep;
do {
// turning right
walkAnim[_frame].frame += _firstWalkingTurnRightFrame;
_frame++;
} while (_frame < _lastCount);
}
lastDir = _currentDir;
}
// all turns checked
_lastCount = _stepCount;
_moduleX = walkAnim[_stepCount - 1].x;
_moduleY = walkAnim[_stepCount - 1].y;
module16X = _moduleX << 16;
module16Y = _moduleY << 16;
}
}
} while (_modularPath[p].dir < NO_DIRECTIONS);
#ifdef SWORD2_DEBUG
if (lastRealDir == 99)
error("slidyWalkAnimatorlast direction error");
#endif
// THE SLOW OUT
addSlowOutFrames(walkAnim);
// TURNS TO END THE WALK ?
// We've done the walk now put in any turns at the end
if (_targetDir == 8) {
// ANY direction -> stand in the last direction
module = _firstStandFrame + lastRealDir;
_targetDir = lastRealDir;
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastRealDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
}
if (_targetDir == 9) {
// 'stance' was non-zero
if (_stepCount == 0) {
module = _framesPerChar + lastRealDir;
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastRealDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
}
} else if (_targetDir != lastRealDir) {
// rotate to target direction
turnDir = _targetDir - lastRealDir;
if ( turnDir < 0)
turnDir += NO_DIRECTIONS;
if (turnDir > 4)
turnDir = -1;
else if (turnDir > 0)
turnDir = 1;
// rotate to target direction
// for george and nico put in a head turn at the start
if (_walkData.usingStandingTurnFrames) {
// new frames for turn frames 29oct95jps
if (turnDir < 0)
module = _firstStandingTurnLeftFrame + lastDir;
else
module = _firstStandingTurnRightFrame + lastDir;
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastRealDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
}
// rotate if we need to
while (lastRealDir != _targetDir) {
lastRealDir += turnDir;
// new frames for turn frames 29oct95jps
if (turnDir < 0) {
if (lastRealDir < 0)
lastRealDir += NO_DIRECTIONS;
module = _firstStandingTurnLeftFrame + lastRealDir;
} else {
if (lastRealDir > 7)
lastRealDir -= NO_DIRECTIONS;
module = _firstStandingTurnRightFrame + lastRealDir;
}
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastRealDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
}
module = _firstStandFrame + lastRealDir;
walkAnim[_stepCount - 1].frame = module;
} else {
// just stand at the end
module = _firstStandFrame + lastRealDir;
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastRealDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
}
walkAnim[_stepCount].frame = 512;
walkAnim[_stepCount].step = 99;
_stepCount++;
walkAnim[_stepCount].frame = 512;
walkAnim[_stepCount].step = 99;
_stepCount++;
walkAnim[_stepCount].frame = 512;
walkAnim[_stepCount].step = 99;
// write all the frames to "debug.txt"
debug(5, "THE WALKDATA:");
for (_frame = 0; _frame <= _stepCount; _frame++)
debug(5, "walkAnim[%d].frame=%d", _frame, walkAnim[_frame].frame);
debug(5, "routeFinder RouteSize is %d", _stepCount);
return;
}
#ifndef FORCE_SLIDY
// THE SOLID PATH ROUTINES
void Router::solidPath() {
/*********************************************************************
* SolidPath creates a path based on whole steps with no sliding to
* get as near as possible to the target without any sliding this
* routine is currently unused, but is intended for use when just
* clicking about.
*
* produce a module list from the line data
*********************************************************************/
int32 smooth;
int32 solid;
int32 scale;
int32 stepX;
int32 stepY;
int32 deltaX;
int32 deltaY;
// strip out the short sections
solid = 1;
smooth = 1;
_modularPath[0].x = _smoothPath[0].x;
_modularPath[0].y = _smoothPath[0].y;
_modularPath[0].dir = _smoothPath[0].dir;
_modularPath[0].num = 0;
do {
scale = _scaleA * _smoothPath[smooth].y + _scaleB;
deltaX = _smoothPath[smooth].x - _modularPath[solid - 1].x;
deltaY = _smoothPath[smooth].y - _modularPath[solid - 1].y;
stepX = _modX[_smoothPath[smooth].dir];
stepY = _modY[_smoothPath[smooth].dir];
stepX = stepX * scale;
stepY = stepY * scale;
stepX = stepX >> 16;
stepY = stepY >> 16;
if (ABS(deltaX) >= ABS(stepX) && ABS(deltaY) >= ABS(stepY)) {
_modularPath[solid].x = _smoothPath[smooth].x;
_modularPath[solid].y = _smoothPath[smooth].y;
_modularPath[solid].dir = _smoothPath[smooth].dir;
_modularPath[solid].num = 1;
solid++;
}
smooth++;
} while (_smoothPath[smooth].num < ROUTE_END_FLAG);
// in case the last bit had no steps
if (solid == 1) {
// there were no paths so put in a dummy end
solid = 2;
_modularPath[1].dir = _smoothPath[0].dir;
_modularPath[1].num = 0;
}
_modularPath[solid - 1].x = _smoothPath[smooth - 1].x;
_modularPath[solid - 1].y = _smoothPath[smooth - 1].y;
// set up the end of the walk
_modularPath[solid].x = _smoothPath[smooth - 1].x;
_modularPath[solid].y = _smoothPath[smooth - 1].y;
_modularPath[solid].dir = 9;
_modularPath[solid].num = ROUTE_END_FLAG;
}
int32 Router::solidWalkAnimator(WalkData *walkAnim) {
/*********************************************************************
* SolidWalk creates an animation based on whole steps with no sliding
* to get as near as possible to the target without any sliding. This
* routine is is intended for use when just clicking about.
*
* produce a module list from the line data
*
* returns 0 if solid route not found
*********************************************************************/
int32 left;
int32 turnDir;
int32 scale;
int32 step;
int32 errorX;
int32 errorY;
int32 moduleEnd;
bool slowStart = false;
// start at the beginning for a change
int32 lastDir = _modularPath[0].dir;
int32 module = _framesPerChar + lastDir;
_currentDir = _modularPath[1].dir;
_moduleX = _startX;
_moduleY = _startY;
_stepCount = 0;
int32 module16X = _moduleX << 16;
int32 module16Y = _moduleY << 16;
// START THE WALK WITH THE FIRST STANDFRAME THIS MAY CAUSE A DELAY
// BUT IT STOPS THE PLAYER MOVING FOR COLLISIONS ARE DETECTED
debug(5, "SOLID: STARTING THE WALK");
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
// TURN TO START THE WALK
debug(5, "SOLID: TURNING TO START THE WALK");
// rotate if we need to
if (lastDir != _currentDir) {
// get the direction to turn
turnDir = _currentDir - lastDir;
if (turnDir < 0)
turnDir += NO_DIRECTIONS;
if (turnDir > 4)
turnDir = -1;
else if (turnDir > 0)
turnDir = 1;
// rotate to new walk direction
// for george and nico put in a head turn at the start
if (_walkData.usingStandingTurnFrames) {
// new frames for turn frames 29oct95jps
if (turnDir < 0)
module = _firstStandingTurnLeftFrame + lastDir;
else
module = _firstStandingTurnRightFrame + lastDir;
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
}
// rotate till were facing new dir then go back 45 degrees
while (lastDir != _currentDir) {
lastDir += turnDir;
// new frames for turn frames
if (turnDir < 0) {
if (lastDir < 0)
lastDir += NO_DIRECTIONS;
module = _firstStandingTurnLeftFrame + lastDir;
} else {
if (lastDir > 7)
lastDir -= NO_DIRECTIONS;
module = _firstStandingTurnRightFrame + lastDir;
}
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = lastDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
}
// the back 45 degrees bit
// step back one because new head turn for george takes us
// past the new dir
_stepCount--;
}
// THE SLOW IN
slowStart = addSlowInFrames(walkAnim);
// THE WALK
debug(5, "SOLID: THE WALK");
// start the walk on the left or right leg, depending on how the
// slow-in frames were drawn
// (0 = left; 1 = right)
if (_walkData.leadingLeg[_currentDir] == 0) {
// start the walk on the left leg (ie. at beginning of the
// first step of the walk cycle)
left = 0;
} else {
// start the walk on the right leg (ie. at beginning of the
// second step of the walk cycle)
left = _framesPerStep;
}
_lastCount = _stepCount;
// this ensures that we don't put in turn frames for the start
lastDir = 99;
// this ensures that we don't put in turn frames for the start
_currentDir = 99;
int32 p;
for (p = 1; _modularPath[p].dir < NO_DIRECTIONS; ++p) {
while (_modularPath[p].num > 0) {
_currentDir = _modularPath[p].dir;
if (_currentDir < NO_DIRECTIONS) {
module = _currentDir * _framesPerStep * 2 + left;
if (left == 0)
left = _framesPerStep;
else
left = 0;
moduleEnd = module + _framesPerStep;
step = 0;
scale = (_scaleA * _moduleY + _scaleB);
do {
module16X += _walkData.dx[module] * scale;
module16Y += _walkData.dy[module] * scale;
_moduleX = module16X >> 16;
_moduleY = module16Y >> 16;
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = step; // normally 0,1,2,3,4,5,0,1,2,etc
walkAnim[_stepCount].dir = _currentDir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
module++;
step++;
} while (module < moduleEnd);
errorX = _modularPath[p].x - _moduleX;
errorX = errorX * _modX[_modularPath[p].dir];
errorY = _modularPath[p].y - _moduleY;
errorY = errorY * _modY[_modularPath[p].dir];
if (errorX < 0 || errorY < 0) {
_modularPath[p].num = 0;
_stepCount -= _framesPerStep;
if (left == 0)
left = _framesPerStep;
else
left = 0;
// Okay this is the end of a section
_moduleX = walkAnim[_stepCount - 1].x;
_moduleY = walkAnim[_stepCount - 1].y;
module16X = _moduleX << 16;
module16Y = _moduleY << 16;
_modularPath[p].x = _moduleX;
_modularPath[p].y = _moduleY;
// Now is the time to put in the turn
// frames for the last turn
if (_stepCount - _lastCount < _framesPerStep) {
// no step taken
// clean up if a slow in but no
// walk
if (slowStart) {
_stepCount -= _walkData.nSlowInFrames[_currentDir];
_lastCount -= _walkData.nSlowInFrames[_currentDir];
slowStart = false;
}
// this ensures that we don't
// put in turn frames for this
// walk or the next
_currentDir = 99;
}
// check each turn condition in turn
if (lastDir != 99 && _currentDir != 99 && _walkData.usingWalkingTurnFrames) {
// only for george
// 1 and -7 going right -1 and
// 7 going left
lastDir = _currentDir - lastDir;
if (lastDir == -1 || lastDir == 7 || lastDir == -2 || lastDir == 6) {
// turn at the end of
// the last walk
_frame = _lastCount - _framesPerStep;
do {
// turning left
walkAnim[_frame].frame += _firstWalkingTurnLeftFrame;
_frame++;
} while (_frame < _lastCount);
} else if (lastDir == 1 || lastDir == -7 || lastDir == 2 || lastDir == -6) {
// turn at the end of
// the current walk
_frame = _lastCount - _framesPerStep;
do {
// turning right
walkAnim[_frame].frame += _firstWalkingTurnRightFrame;
_frame++;
} while (_frame < _lastCount);
}
}
// all turns checked
_lastCount = _stepCount;
}
}
}
lastDir = _currentDir;
// can only be valid first time round
slowStart = false;
}
// THE SLOW OUT
addSlowOutFrames(walkAnim);
module = _framesPerChar + _modularPath[p - 1].dir;
walkAnim[_stepCount].frame = module;
walkAnim[_stepCount].step = 0;
walkAnim[_stepCount].dir = _modularPath[p - 1].dir;
walkAnim[_stepCount].x = _moduleX;
walkAnim[_stepCount].y = _moduleY;
_stepCount++;
walkAnim[_stepCount].frame = 512;
walkAnim[_stepCount].step = 99;
_stepCount++;
walkAnim[_stepCount].frame = 512;
walkAnim[_stepCount].step = 99;
_stepCount++;
walkAnim[_stepCount].frame = 512;
walkAnim[_stepCount].step = 99;
debug(5, "THE WALKDATA:");
for (_frame = 0; _frame <= _stepCount; _frame++)
debug(5, "walkAnim[%d].frame=%d", _frame, walkAnim[_frame].frame);
// NO END TURNS
debug(5, "routeFinder RouteSize is %d", _stepCount);
// now check the route
for (int i = 0; i < p - 1; ++i) {
if (!check(_modularPath[i].x, _modularPath[i].y, _modularPath[i + 1].x, _modularPath[i + 1].y))
p = 0;
}
if (p != 0) {
_targetDir = _modularPath[p - 1].dir;
if (checkTarget(_moduleX, _moduleY) == 3) {
// new target on a line
p = 0;
debug(5, "Solid walk target was on a line %d %d", _moduleX, _moduleY);
}
}
return p;
}
#endif
// THE SCAN ROUTINES
bool Router::scan(int32 level) {
/*********************************************************************
* Called successively from routeFinder until no more changes take
* place in the grid array, ie he best path has been found
*
* Scans through every point in the node array and checks if there is
* a route between each point and if this route gives a new route.
*
* This routine could probably halve its processing time if it doubled
* up on the checks after each route check
*
*********************************************************************/
int32 x1, y1, x2, y2;
int32 distance;
bool changed = false;
// For all the nodes that have new values and a distance less than
// enddist, ie dont check for new routes from a point we checked
// before or from a point that is already further away than the best
// route so far.
for (int i = 0; i < _nNodes; i++) {
if (_node[i].dist < _node[_nNodes].dist && _node[i].level == level) {
x1 = _node[i].x;
y1 = _node[i].y;
for (int j = _nNodes; j > 0; j--) {
if (_node[j].dist > _node[i].dist) {
x2 = _node[j].x;
y2 = _node[j].y;
if (ABS(x2 - x1) > 4.5 * ABS(y2 - y1))
distance = (8 * ABS(x2 - x1) + 18 * ABS(y2 - y1)) / (54 * 8) + 1;
else
distance = (6 * ABS(x2 - x1) + 36 * ABS(y2 - y1)) / (36 * 14) + 1;
if (distance + _node[i].dist < _node[_nNodes].dist && distance + _node[i].dist < _node[j].dist) {
if (newCheck(0, x1, y1, x2, y2)) {
_node[j].level = level + 1;
_node[j].dist = distance + _node[i].dist;
_node[j].prev = i;
changed = true;
}
}
}
}
}
}
return changed;
}
int32 Router::newCheck(int32 status, int32 x1, int32 y1, int32 x2, int32 y2) {
/*********************************************************************
* newCheck routine checks if the route between two points can be
* achieved without crossing any of the bars in the Bars array.
*
* newCheck differs from check in that that 4 route options are
* considered corresponding to actual walked routes.
*
* Note distance doesnt take account of shrinking ???
*
* Note Bars array must be properly calculated ie min max dx dy co
*********************************************************************/
int32 ldx;
int32 ldy;
int32 dlx;
int32 dly;
int32 dirX;
int32 dirY;
int32 step1;
int32 step2;
int32 step3;
int32 steps;
int32 options;
steps = 0;
options = 0;
ldx = x2 - x1;
ldy = y2 - y1;
dirX = 1;
dirY = 1;
if (ldx < 0) {
ldx = -ldx;
dirX = -1;
}
if (ldy < 0) {
ldy = -ldy;
dirY = -1;
}
// make the route options
if (_diagonaly * ldx > _diagonalx * ldy) {
// dir = 1,2 or 2,3 or 5,6 or 6,7
dly = ldy;
dlx = (ldy * _diagonalx) / _diagonaly;
ldx = ldx - dlx;
dlx = dlx * dirX;
dly = dly * dirY;
ldx = ldx * dirX;
ldy = 0;
// options are square, diagonal a code 1 route
step1 = check(x1, y1, x1 + ldx, y1);
if (step1 != 0) {
step2 = check(x1 + ldx, y1, x2, y2);
if (step2 != 0) {
steps = step1 + step2;
options |= 2;
}
}
// diagonal, square a code 2 route
if (steps == 0 || status == 1) {
step1 = check(x1, y1, x1 + dlx, y1 + dly);
if (step1 != 0) {
step2 = check(x1 + dlx, y2, x2, y2);
if (step2 != 0) {
steps = step1 + step2;
options |= 4;
}
}
}
// halfsquare, diagonal, halfsquare a code 0 route
if (steps == 0 || status == 1) {
step1 = check(x1, y1, x1 + ldx / 2, y1);
if (step1 != 0) {
step2 = check(x1 + ldx / 2, y1, x1 + ldx / 2 + dlx, y2);
if (step2 != 0) {
step3 = check(x1 + ldx / 2 + dlx, y2, x2, y2);
if (step3 != 0) {
steps = step1 + step2 + step3;
options |= 1;
}
}
}
}
// halfdiagonal, square, halfdiagonal a code 3 route
if (steps == 0 || status == 1) {
step1 = check(x1, y1, x1 + dlx / 2, y1 + dly / 2);
if (step1 != 0) {
step2 = check(x1 + dlx / 2, y1 + dly / 2, x1 + ldx + dlx / 2, y1 + dly / 2);
if (step2 != 0) {
step3 = check(x1 + ldx + dlx / 2, y1 + dly / 2, x2, y2);
if (step3 != 0) {
steps = step1 + step2 + step3;
options |= 8;
}
}
}
}
} else {
// dir = 7,0 or 0,1 or 3,4 or 4,5
dlx = ldx;
dly = (ldx * _diagonaly) / _diagonalx;
ldy = ldy - dly;
dlx = dlx * dirX;
dly = dly * dirY;
ldy = ldy * dirY;
ldx = 0;
// options are square, diagonal a code 1 route
step1 = check(x1 ,y1, x1, y1 + ldy);
if (step1 != 0) {
step2 = check(x1, y1 + ldy, x2, y2);
if (step2 != 0) {
steps = step1 + step2;
options |= 2;
}
}
// diagonal, square a code 2 route
if (steps == 0 || status == 1) {
step1 = check(x1, y1, x2, y1 + dly);
if (step1 != 0) {
step2 = check(x2, y1 + dly, x2, y2);
if (step2 != 0) {
steps = step1 + step2;
options |= 4;
}
}
}
// halfsquare, diagonal, halfsquare a code 0 route
if (steps == 0 || status == 1) {
step1 = check(x1, y1, x1, y1 + ldy / 2);
if (step1 != 0) {
step2 = check(x1, y1 + ldy / 2, x2, y1 + ldy / 2 + dly);
if (step2 != 0) {
step3 = check(x2, y1 + ldy / 2 + dly, x2, y2);
if (step3 != 0) {
steps = step1 + step2 + step3;
options |= 1;
}
}
}
}
// halfdiagonal, square, halfdiagonal a code 3 route
if (steps == 0 || status == 1) {
step1 = check(x1, y1, x1 + dlx / 2, y1 + dly / 2);
if (step1 != 0) {
step2 = check(x1 + dlx / 2, y1 + dly / 2, x1 + dlx / 2, y1 + ldy + dly / 2);
if (step2 != 0) {
step3 = check(x1 + dlx / 2, y1 + ldy + dly / 2, x2, y2);
if (step3 != 0) {
steps = step1 + step2 + step3;
options |= 8;
}
}
}
}
}
if (status == 0)
status = steps;
else
status = options;
return status;
}
// CHECK ROUTINES
bool Router::check(int32 x1, int32 y1, int32 x2, int32 y2) {
// call the fastest line check for the given line
// returns true if line didn't cross any bars
if (x1 == x2 && y1 == y2)
return true;
if (x1 == x2)
return vertCheck(x1, y1, y2);
if (y1 == y2)
return horizCheck(x1, y1, x2);
return lineCheck(x1, y1, x2, y2);
}
bool Router::lineCheck(int32 x1, int32 y1, int32 x2, int32 y2) {
bool linesCrossed = true;
int32 xmin = MIN(x1, x2);
int32 xmax = MAX(x1, x2);
int32 ymin = MIN(y1, y2);
int32 ymax = MAX(y1, y2);
// Line set to go one step in chosen direction so ignore if it hits
// anything
int32 dirx = x2 - x1;
int32 diry = y2 - y1;
int32 co = (y1 * dirx) - (x1 * diry); // new line equation
for (int i = 0; i < _nBars && linesCrossed; i++) {
// skip if not on module
if (xmax >= _bars[i].xmin && xmin <= _bars[i].xmax && ymax >= _bars[i].ymin && ymin <= _bars[i].ymax) {
// Okay, it's a valid line. Calculate an intercept. Wow
// but all this arithmetic we must have loads of time
// slope it he slope between the two lines
int32 slope = (_bars[i].dx * diry) - (_bars[i].dy *dirx);
// assuming parallel lines don't cross
if (slope != 0) {
// calculate x intercept and check its on both
// lines
int32 xc = ((_bars[i].co * dirx) - (co * _bars[i].dx)) / slope;
// skip if not on module
if (xc >= xmin - 1 && xc <= xmax + 1) {
// skip if not on line
if (xc >= _bars[i].xmin - 1 && xc <= _bars[i].xmax + 1) {
int32 yc = ((_bars[i].co * diry) - (co * _bars[i].dy)) / slope;
// skip if not on module
if (yc >= ymin - 1 && yc <= ymax + 1) {
// skip if not on line
if (yc >= _bars[i].ymin - 1 && yc <= _bars[i].ymax + 1) {
linesCrossed = false;
}
}
}
}
}
}
}
return linesCrossed;
}
bool Router::horizCheck(int32 x1, int32 y, int32 x2) {
bool linesCrossed = true;
int32 xmin = MIN(x1, x2);
int32 xmax = MAX(x1, x2);
// line set to go one step in chosen direction so ignore if it hits
// anything
for (int i = 0; i < _nBars && linesCrossed; i++) {
// skip if not on module
if (xmax >= _bars[i].xmin && xmin <= _bars[i].xmax && y >= _bars[i].ymin && y <= _bars[i].ymax) {
// Okay, it's a valid line calculate an intercept. Wow
// but all this arithmetic we must have loads of time
if (_bars[i].dy == 0)
linesCrossed = false;
else {
int32 ldy = y - _bars[i].y1;
int32 xc = _bars[i].x1 + (_bars[i].dx * ldy) / _bars[i].dy;
// skip if not on module
if (xc >= xmin - 1 && xc <= xmax + 1)
linesCrossed = false;
}
}
}
return linesCrossed;
}
bool Router::vertCheck(int32 x, int32 y1, int32 y2) {
bool linesCrossed = true;
int32 ymin = MIN(y1, y2);
int32 ymax = MAX(y1, y2);
// Line set to go one step in chosen direction so ignore if it hits
// anything
for (int i = 0; i < _nBars && linesCrossed; i++) {
// skip if not on module
if (x >= _bars[i].xmin && x <= _bars[i].xmax && ymax >= _bars[i].ymin && ymin <= _bars[i].ymax) {
// Okay, it's a valid line calculate an intercept. Wow
// but all this arithmetic we must have loads of time
// both lines vertical and overlap in x and y so they
// cross
if (_bars[i].dx == 0)
linesCrossed = false;
else {
int32 ldx = x - _bars[i].x1;
int32 yc = _bars[i].y1 + (_bars[i].dy * ldx) / _bars[i].dx;
// the intercept overlaps
if (yc >= ymin - 1 && yc <= ymax + 1)
linesCrossed = false;
}
}
}
return linesCrossed;
}
int32 Router::checkTarget(int32 x, int32 y) {
int32 onLine = 0;
int32 xmin = x - 1;
int32 xmax = x + 1;
int32 ymin = y - 1;
int32 ymax = y + 1;
// check if point +- 1 is on the line
// so ignore if it hits anything
for (int i = 0; i < _nBars && onLine == 0; i++) {
// overlapping line
if (xmax >= _bars[i].xmin && xmin <= _bars[i].xmax && ymax >= _bars[i].ymin && ymin <= _bars[i].ymax) {
int32 xc, yc;
// okay this line overlaps the target calculate an y intercept for x
// vertical line so we know it overlaps y
if (_bars[i].dx == 0)
yc = 0;
else {
int ldx = x - _bars[i].x1;
yc = _bars[i].y1 + (_bars[i].dy * ldx) / _bars[i].dx;
}
// overlapping point for y
if (yc >= ymin && yc <= ymax) {
// target on a line so drop out
onLine = 3;
debug(5, "RouteFail due to target on a line %d %d", x, y);
} else {
// vertical line so we know it overlaps y
if (_bars[i].dy == 0)
xc = 0;
else {
int32 ldy = y - _bars[i].y1;
xc = _bars[i].x1 + (_bars[i].dx * ldy) / _bars[i].dy;
}
// skip if not on module
if (xc >= xmin && xc <= xmax) {
// target on a line so drop out
onLine = 3;
debug(5, "RouteFail due to target on a line %d %d", x, y);
}
}
}
}
return onLine;
}
// THE SETUP ROUTINES
void Router::loadWalkData(byte *ob_walkdata) {
uint16 firstFrameOfDirection;
uint16 walkFrameNo;
uint32 frameCounter = 0; // starts at frame 0 of mega set
int i;
_walkData.read(ob_walkdata);
// 0 = not using slow out frames; non-zero = using that many frames
// for each leading leg for each direction
_numberOfSlowOutFrames = _walkData.usingSlowOutFrames;
for (i = 0; i < NO_DIRECTIONS; i++) {
firstFrameOfDirection = i * _walkData.nWalkFrames;
_modX[i] = 0;
_modY[i] = 0;
for (walkFrameNo = firstFrameOfDirection; walkFrameNo < firstFrameOfDirection + _walkData.nWalkFrames / 2; walkFrameNo++) {
// eg. _modX[0] is the sum of the x-step sizes for the
// first half of the walk cycle for direction 0
_modX[i] += _walkData.dx[walkFrameNo];
_modY[i] += _walkData.dy[walkFrameNo];
}
}
_diagonalx = _modX[3];
_diagonaly = _modY[3];
// interpret the walk data
_framesPerStep = _walkData.nWalkFrames / 2;
_framesPerChar = _walkData.nWalkFrames * NO_DIRECTIONS;
// offset pointers added Oct 30 95 JPS
// mega id references removed 16sep96 by JEL
// WALK FRAMES
// start on frame 0
frameCounter += _framesPerChar;
// STAND FRAMES
// stand frames come after the walk frames
// one stand frame for each direction
_firstStandFrame = frameCounter;
frameCounter += NO_DIRECTIONS;
// STANDING TURN FRAMES - OPTIONAL!
// standing turn-left frames come after the slow-out frames
// one for each direction
// standing turn-left frames come after the standing turn-right frames
// one for each direction
if (_walkData.usingStandingTurnFrames) {
_firstStandingTurnLeftFrame = frameCounter;
frameCounter += NO_DIRECTIONS;
_firstStandingTurnRightFrame = frameCounter;
frameCounter += NO_DIRECTIONS;
} else {
// refer instead to the normal stand frames
_firstStandingTurnLeftFrame = _firstStandFrame;
_firstStandingTurnRightFrame = _firstStandFrame;
}
// WALKING TURN FRAMES - OPTIONAL!
// walking left-turn frames come after the stand frames
// walking right-turn frames come after the walking left-turn frames
if (_walkData.usingWalkingTurnFrames) {
_firstWalkingTurnLeftFrame = frameCounter;
frameCounter += _framesPerChar;
_firstWalkingTurnRightFrame = frameCounter;
frameCounter += _framesPerChar;
} else {
_firstWalkingTurnLeftFrame = 0;
_firstWalkingTurnRightFrame = 0;
}
// SLOW-IN FRAMES - OPTIONAL!
// slow-in frames come after the walking right-turn frames
if (_walkData.usingSlowInFrames) {
// Make note of frame number of first slow-in frame for each
// direction. There may be a different number of slow-in
// frames in each direction
for (i = 0; i < NO_DIRECTIONS; i++) {
_firstSlowInFrame[i] = frameCounter;
frameCounter += _walkData.nSlowInFrames[i];
}
}
// SLOW-OUT FRAMES - OPTIONAL!
// slow-out frames come after the slow-in frames
if (_walkData.usingSlowOutFrames)
_firstSlowOutFrame = frameCounter;
}
// THE ROUTE EXTRACTOR
void Router::extractRoute() {
/*********************************************************************
* extractRoute gets route from the node data after a full scan, route
* is written with just the basic way points and direction options for
* heading to the next point.
*********************************************************************/
int32 prev;
int32 prevx;
int32 prevy;
int32 last;
int32 point;
int32 dirx;
int32 diry;
int32 dir;
int32 ldx;
int32 ldy;
int32 p;
// extract the route from the node data
prev = _nNodes;
last = prev;
point = O_ROUTE_SIZE - 1;
_route[point].x = _node[last].x;
_route[point].y = _node[last].y;
do {
point--;
prev = _node[last].prev;
prevx = _node[prev].x;
prevy = _node[prev].y;
_route[point].x = prevx;
_route[point].y = prevy;
last = prev;
} while (prev > 0);
// now shuffle route down in the buffer
_routeLength = 0;
do {
_route[_routeLength].x = _route[point].x;
_route[_routeLength].y = _route[point].y;
point++;
_routeLength++;
} while (point < O_ROUTE_SIZE);
_routeLength--;
// okay the route exists as a series point now put in some directions
for (p = 0; p < _routeLength; ++p) {
ldx = _route[p + 1].x - _route[p].x;
ldy = _route[p + 1].y - _route[p].y;
dirx = 1;
diry = 1;
if (ldx < 0) {
ldx = -ldx;
dirx = -1;
}
if (ldy < 0) {
ldy = -ldy;
diry = -1;
}
if (_diagonaly * ldx > _diagonalx * ldy) {
// dir = 1,2 or 2,3 or 5,6 or 6,7
// 2 or 6
dir = 4 - 2 * dirx;
_route[p].dirS = dir;
// 1, 3, 5 or 7
dir = dir + diry * dirx;
_route[p].dirD = dir;
} else {
// dir = 7,0 or 0,1 or 3,4 or 4,5
// 0 or 4
dir = 2 + 2 * diry;
_route[p].dirS = dir;
// 2 or 6
dir = 4 - 2 * dirx;
// 1, 3, 5 or 7
dir = dir + diry * dirx;
_route[p].dirD = dir;
}
}
// set the last dir to continue previous route unless specified
if (_targetDir == NO_DIRECTIONS) {
// ANY direction
_route[p].dirS = _route[p - 1].dirS;
_route[p].dirD = _route[p - 1].dirD;
} else {
_route[p].dirS = _targetDir;
_route[p].dirD = _targetDir;
}
return;
}
void Router::setUpWalkGrid(byte *ob_mega, int32 x, int32 y, int32 dir) {
ObjectMega obMega(ob_mega);
// get walk grid file + extra grid into 'bars' & 'node' arrays
loadWalkGrid();
// copy the mega structure into the local variables for use in all
// subroutines
_startX = obMega.getFeetX();
_startY = obMega.getFeetY();
_startDir = obMega.getCurDir();
_targetX = x;
_targetY = y;
_targetDir = dir;
_scaleA = obMega.getScaleA();
_scaleB = obMega.getScaleB();
// mega's current position goes into first node
_node[0].x = _startX;
_node[0].y = _startY;
_node[0].level = 1;
_node[0].prev = 0;
_node[0].dist = 0;
// reset other nodes
for (int i = 1; i < _nNodes; i++) {
_node[i].level = 0;
_node[i].prev = 0;
_node[i].dist = 9999;
}
// target position goes into final node
_node[_nNodes].x = _targetX;
_node[_nNodes].y = _targetY;
_node[_nNodes].level = 0;
_node[_nNodes].prev = 0;
_node[_nNodes].dist = 9999;
}
void Router::plotWalkGrid() {
int32 i;
// get walk grid file + extra grid into 'bars' & 'node' arrays
loadWalkGrid();
// lines
for (i = 0; i < _nBars; i++)
_vm->_screen->drawLine(_bars[i].x1, _bars[i].y1, _bars[i].x2, _bars[i].y2, 254);
// nodes
// leave node 0 for start node
for (i = 1; i < _nNodes; i++)
plotCross(_node[i].x, _node[i].y, 184);
}
void Router::plotCross(int16 x, int16 y, uint8 colour) {
_vm->_screen->drawLine(x - 1, y - 1, x + 1, y + 1, colour);
_vm->_screen->drawLine(x + 1, y - 1, x - 1, y + 1, colour);
}
void Router::loadWalkGrid() {
WalkGridHeader floorHeader;
byte *fPolygrid;
uint16 fPolygridLen;
_nBars = 0; // reset counts
_nNodes = 1; // leave node 0 for start-node
// STATIC GRIDS (added/removed by object logics)
// go through walkgrid list
for (int i = 0; i < MAX_WALKGRIDS; i++) {
if (_walkGridList[i]) {
int j;
// open walk grid file
fPolygrid = _vm->_resman->openResource(_walkGridList[i]);
fPolygridLen = _vm->_resman->fetchLen(_walkGridList[i]);
Common::MemoryReadStream readS(fPolygrid, fPolygridLen);
readS.seek(ResHeader::size());
floorHeader.numBars = readS.readSint32LE();
floorHeader.numNodes = readS.readSint32LE();
// check that we're not going to exceed the max
// allowed in the complete walkgrid arrays
assert(_nBars + floorHeader.numBars < O_GRID_SIZE);
assert(_nNodes + floorHeader.numNodes < O_GRID_SIZE);
// lines
for (j = 0; j < floorHeader.numBars; j++) {
_bars[_nBars + j].x1 = readS.readSint16LE();
_bars[_nBars + j].y1 = readS.readSint16LE();
_bars[_nBars + j].x2 = readS.readSint16LE();
_bars[_nBars + j].y2 = readS.readSint16LE();
_bars[_nBars + j].xmin = readS.readSint16LE();
_bars[_nBars + j].ymin = readS.readSint16LE();
_bars[_nBars + j].xmax = readS.readSint16LE();
_bars[_nBars + j].ymax = readS.readSint16LE();
_bars[_nBars + j].dx = readS.readSint16LE();
_bars[_nBars + j].dy = readS.readSint16LE();
_bars[_nBars + j].co = readS.readSint32LE();
}
// nodes
// leave node 0 for start node
for (j = 0; j < floorHeader.numNodes; j++) {
_node[_nNodes + j].x = readS.readSint16LE();
_node[_nNodes + j].y = readS.readSint16LE();
}
// close walk grid file
_vm->_resman->closeResource(_walkGridList[i]);
// increment counts of total bars & nodes in whole
// walkgrid
_nBars += floorHeader.numBars;
_nNodes += floorHeader.numNodes;
}
}
}
void Router::clearWalkGridList() {
memset(_walkGridList, 0, sizeof(_walkGridList));
}
// called from fnAddWalkGrid
void Router::addWalkGrid(int32 gridResource) {
int i;
// First, scan the list to see if this grid is already included
for (i = 0; i < MAX_WALKGRIDS; i++) {
if (_walkGridList[i] == gridResource)
return;
}
// Scan the list for a free slot
for (i = 0; i < MAX_WALKGRIDS; i++) {
if (_walkGridList[i] == 0) {
_walkGridList[i] = gridResource;
return;
}
}
error("_walkGridList[] full");
}
// called from fnRemoveWalkGrid
void Router::removeWalkGrid(int32 gridResource) {
for (int i = 0; i < MAX_WALKGRIDS; i++) {
if (_walkGridList[i] == gridResource) {
// If we've found it in the list, reset entry to zero.
// Otherwise just ignore the request.
_walkGridList[i] = 0;
break;
}
}
}
} // End of namespace Sword2
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