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/* Copyright (C) 1994-2003 Revolution Software Ltd
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*/
#ifndef _ROUTER_H
#define _ROUTER_H
// This used to be a variable, but it was never set. Actually, it wasn't even
// initialised!
//
// Define this to force the use of slidy router (so solid path not used when
// ending walk in ANY direction)
//
// #define FORCE_SLIDY
#include "sword2/object.h"
namespace Sword2 {
#if !defined(__GNUC__)
#pragma START_PACK_STRUCTS
#endif
struct _walkData {
uint16 frame;
int16 x;
int16 y;
uint8 step;
uint8 dir;
} GCC_PACK;
struct _barData {
int16 x1;
int16 y1;
int16 x2;
int16 y2;
int16 xmin;
int16 ymin;
int16 xmax;
int16 ymax;
int16 dx; // x2 - x1
int16 dy; // y2 - y1
int32 co; // co = (y1 * dx) - (x1 * dy) from an equation for a
// line y * dx = x * dy + co
} GCC_PACK;
struct _nodeData {
int16 x;
int16 y;
int16 level;
int16 prev;
int16 dist;
} GCC_PACK;
#if !defined(__GNUC__)
#pragma END_PACK_STRUCTS
#endif
// because we only have 2 megas in the game!
#define TOTAL_ROUTE_SLOTS 2
#define MAX_FRAMES_PER_CYCLE 16
#define NO_DIRECTIONS 8
#define MAX_FRAMES_PER_CHAR (MAX_FRAMES_PER_CYCLE * NO_DIRECTIONS)
#define ROUTE_END_FLAG 255
#define MAX_WALKGRIDS 10
#define O_WALKANIM_SIZE 600 // max number of nodes in router output
#define O_GRID_SIZE 200 // max 200 lines & 200 points
#define EXTRA_GRID_SIZE 20 // max 20 lines & 20 points
#define O_ROUTE_SIZE 50 // max number of modules in a route
typedef struct {
int32 x;
int32 y;
int32 dirS;
int32 dirD;
} _routeData;
typedef struct {
int32 x;
int32 y;
int32 dir;
int32 num;
} _pathData;
class Router {
private:
Sword2Engine *_vm;
// stores pointers to mem blocks containing routes created & used by
// megas (NULL if slot not in use)
mem *_routeSlots[TOTAL_ROUTE_SLOTS];
// because extra bars will be copied into here afer walkgrid loaded
_barData _bars[O_GRID_SIZE + EXTRA_GRID_SIZE];
_nodeData _node[O_GRID_SIZE + EXTRA_GRID_SIZE];
int32 _walkGridList[MAX_WALKGRIDS];
int32 _nbars;
int32 _nnodes;
// area for extra route data to block parts of floors and enable
// routing round mega charaters
int32 _nExtraBars;
int32 _nExtraNodes;
_barData _extraBars[EXTRA_GRID_SIZE];
_nodeData _extraNode[EXTRA_GRID_SIZE];
int32 _startX;
int32 _startY;
int32 _startDir;
int32 _targetX;
int32 _targetY;
int32 _targetDir;
int32 _scaleA;
int32 _scaleB;
_routeData _route[O_ROUTE_SIZE];
_pathData _smoothPath[O_ROUTE_SIZE];
_pathData _modularPath[O_ROUTE_SIZE];
int32 _routeLength;
int32 _framesPerStep;
int32 _framesPerChar;
uint8 _nWalkFrames; // no. of frames per walk cycle
uint8 _usingStandingTurnFrames; // any standing turn frames?
uint8 _usingWalkingTurnFrames; // any walking turn frames?
uint8 _usingSlowInFrames; // any slow-in frames?
uint8 _usingSlowOutFrames; // any slow-out frames?
int32 _dx[NO_DIRECTIONS + MAX_FRAMES_PER_CHAR];
int32 _dy[NO_DIRECTIONS + MAX_FRAMES_PER_CHAR];
int8 _modX[NO_DIRECTIONS];
int8 _modY[NO_DIRECTIONS];
int32 _diagonalx;
int32 _diagonaly;
int32 _firstStandFrame;
int32 _firstStandingTurnLeftFrame;
int32 _firstStandingTurnRightFrame;
int32 _firstWalkingTurnLeftFrame; // left walking turn
int32 _firstWalkingTurnRightFrame; // right walking turn
uint32 _firstSlowInFrame[NO_DIRECTIONS];
uint32 _numberOfSlowInFrames[NO_DIRECTIONS];
uint32 _leadingLeg[NO_DIRECTIONS];
int32 _firstSlowOutFrame;
// number of slow-out frames on for each leading-leg in each direction
// ie. total number of slow-out frames = (numberOfSlowOutFrames * 2 *
// NO_DIRECTIONS)
int32 _numberOfSlowOutFrames;
int32 _stepCount;
int32 _moduleX;
int32 _moduleY;
int32 _currentDir;
int32 _lastCount;
int32 _frame;
uint8 returnSlotNo(uint32 megaId);
int32 getRoute(void);
void extractRoute(void);
void loadWalkGrid(void);
void setUpWalkGrid(Object_mega *ob_mega, int32 x, int32 y, int32 dir);
void loadWalkData(Object_walkdata *ob_walkdata);
int32 scan(int32 level);
int32 newCheck(int32 status, int32 x1, int32 y1, int32 x2, int32 y2);
int32 lineCheck(int32 x1, int32 x2, int32 y1, int32 y2);
int32 vertCheck(int32 x, int32 y1, int32 y2);
int32 horizCheck(int32 x1, int32 y, int32 x2);
int32 check(int32 x1, int32 y1, int32 x2, int32 y2);
int32 checkTarget(int32 x, int32 y);
int32 smoothestPath(void);
int32 slidyPath(void);
int32 smoothCheck(int32 best, int32 p, int32 dirS, int32 dirD);
int32 addSlowInFrames(_walkData *walkAnim);
void addSlowOutFrames(_walkData *walkAnim);
void slidyWalkAnimator(_walkData *walkAnim);
#ifndef FORCE_SLIDY
int32 solidPath(void);
int32 solidWalkAnimator(_walkData *walkAnim);
#endif
void plotCross(int16 x, int16 y, uint8 colour);
public:
Router(Sword2Engine *vm)
: _vm(vm), _nExtraBars(0), _nExtraNodes(0), _diagonalx(0),
_diagonaly(0) {
memset(_routeSlots, 0, sizeof(_routeSlots));
memset(_bars, 0, sizeof(_bars));
memset(_node, 0, sizeof(_node));
memset(_walkGridList, 0, sizeof(_walkGridList));
memset(_extraBars, 0, sizeof(_extraBars));
memset(_extraNode, 0, sizeof(_extraNode));
memset(_route, 0, sizeof(_route));
memset(_smoothPath, 0, sizeof(_smoothPath));
memset(_modularPath, 0, sizeof(_modularPath));
memset(_dx, 0, sizeof(_dx));
memset(_dy, 0, sizeof(_dy));
memset(_modX, 0, sizeof(_modX));
memset(_modY, 0, sizeof(_modY));
memset(_firstSlowInFrame, 0, sizeof(_firstSlowInFrame));
memset(_numberOfSlowInFrames, 0, sizeof(_numberOfSlowInFrames));
memset(_leadingLeg, 0, sizeof(_leadingLeg));
}
int32 routeFinder(Object_mega *ob_mega, Object_walkdata *ob_walkdata, int32 x, int32 y, int32 dir);
void earlySlowOut(Object_mega *ob_mega, Object_walkdata *ob_walkdata);
void allocateRouteMem(void);
_walkData* lockRouteMem(void);
void floatRouteMem(void);
void freeRouteMem(void);
void freeAllRouteMem(void);
void addWalkGrid(int32 gridResource);
void removeWalkGrid(int32 gridResource);
void clearWalkGridList(void);
void plotWalkGrid(void);
};
} // End of namespace Sword2
#endif
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