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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
*/
#ifndef BLADERUNNER_OBSTACLES_H
#define BLADERUNNER_OBSTACLES_H
#include "bladerunner/rect_float.h"
#include "bladerunner/vector.h"
namespace BladeRunner {
class BladeRunnerEngine;
class SaveFileReadStream;
class SaveFileWriteStream;
class Obstacles {
static const int kVertexCount = 150;
static const int kPolygonCount = 50;
static const int kPolygonVertexCount = 160;
static const int kMaxPathSize = 500;
enum VertexType {
BOTTOM_LEFT,
TOP_LEFT,
TOP_RIGHT,
BOTTOM_RIGHT
};
struct LineSegment {
Vector2 start;
Vector2 end;
};
struct Polygon {
bool isPresent;
int verticeCount;
RectFloat rect;
Vector2 vertices[kPolygonVertexCount];
VertexType vertexType[kPolygonVertexCount];
Polygon() : isPresent(false), verticeCount(0), vertexType()
{}
};
BladeRunnerEngine *_vm;
Polygon *_polygons;
Polygon *_polygonsBackup;
Vector2 *_path;
int _pathSize;
int _count;
bool _backup;
static bool lineLineIntersection(LineSegment a, LineSegment b, Vector2 *intersectionPoint);
static bool linePolygonIntersection(LineSegment lineA, VertexType lineAType, Polygon *polyB, Vector2 *intersectionPoint, int *intersectionIndex, int pathLengthSinceLastIntersection);
bool mergePolygons(Polygon &polyA, Polygon &PolyB);
public:
Obstacles(BladeRunnerEngine *vm);
~Obstacles();
void clear();
void add(RectFloat rect);
void add(float x0, float z0, float x1, float z1) { add(RectFloat(x0, z0, x1, z1)); }
int findEmptyPolygon() const;
static float getLength(float x0, float z0, float x1, float z1);
bool findNextWaypoint(const Vector3 &from, const Vector3 &to, Vector3 *next);
bool findIntersectionNearest(int polygonIndex, Vector2 from, Vector2 to,
int *outVertexIndex, float *outDistance, Vector2 *out) const;
bool findIntersectionFarthest(int polygonIndex, Vector2 from, Vector2 to,
int *outVertexIndex, float *outDistance, Vector2 *out) const;
float pathTotalDistance(const Vector2 *path, int pathSize, Vector2 from, Vector2 to) const;
bool findPolygonVerticeByXZ(int *polygonIndex, int *verticeIndex, int *verticeCount, float x, float z) const;
bool findPolygonVerticeByXZWithinTolerance(float x, float z, int *polygonIndex, int *verticeIndex, int startSearchFromPolygonIdx) const;
void clearPath();
int buildNegativePath(int polyIndex, int vertStartIndex, Vector2 startPos, int vertEndIndex, Vector2 endPos, Vector2 *path, int pathCapacity, bool *pathBlocked);
int buildPositivePath(int polyIndex, int vertStartIndex, Vector2 startPos, int vertEndIndex, Vector2 endPos, Vector2 *path, int pathCapacity, bool *pathBlocked);
bool verticesCanIntersect(int lineType0, int lineType1, float x0, float y0, float x1, float y1) const;
bool findFarthestAvailablePathVertex(Vector2 *path, int pathSize, Vector3 start, Vector3 *next) const;
void backup();
void restore();
void reset();
void draw();
void save(SaveFileWriteStream &f);
void load(SaveFileReadStream &f);
};
} // End of namespace BladeRunner
#endif
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