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#ifndef _BSPTREE_H_
#define _BSPTREE_H_
#include "Triangle.h"
#include <list>
#include <cmath>
class BSPTree {
private:
class Plane {
public:
Plane() : d(0) {}
Plane(const Vector &n, float d0) : normal(n), d(d0) {}
bool contains(Vertex v) {
return (fabsf(normal.dot(Vector(v)) - d) < 1E-6);
}
bool isBehind(Vertex v) {
return (normal.dot(Vector(v)) - d) < 0;
}
const Vector& getNormal() {
return normal;
}
private:
Vector normal;
float d;
};
public:
BSPTree(const std::list<Triangle> &triangles);
template<typename T>
void visit(T& visitor, const Vector &v) {
if(plane.getNormal().dot(v) > 0) {
if(frontTree)
frontTree->visit(visitor, v);
for(std::list<Triangle>::iterator t = triangles.begin(); t != triangles.end(); ++t) {
visitor(*t);
}
if(backTree)
backTree->visit(visitor, v);
}
else {
if(backTree)
backTree->visit(visitor, v);
for(std::list<Triangle>::iterator t = triangles.begin(); t != triangles.end(); ++t) {
visitor(*t);
}
if(frontTree)
frontTree->visit(visitor, v);
}
}
private:
Plane plane;
std::list<Triangle> triangles;
BSPTree *frontTree, *backTree;
static Vertex findCenter(const std::list<Triangle> &triangles);
static const Triangle* findNearestTriangle(const std::list<Triangle> &triangles, const Vertex &v);
};
#endif /* _BSPTREE_H_ */
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