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quadtree.h
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quadtree.h
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#ifndef QUADTREE_H
#define QUADTREE_H
#include "utils.h"
#include "boid.h"
#define QUADTREE_MAX_BOID_PER_CELL (8)
struct quadtree {
// Pointers to this tree's subsections
struct quadtree *topLeft;
struct quadtree *topRight;
struct quadtree *bottomLeft;
struct quadtree *bottomRight;
// Size and position
struct vector2f position;
float size;
//Pointer array to hold the boids
struct boid *boids[QUADTREE_MAX_BOID_PER_CELL];
int boidCount;
// To remember if this quad has split or not yet
char hasSplit;
};
struct quadQueryReturn {
struct boid **boids;
int boidCount;
int arrayCapacity;
};
struct quadtree* createQuadtree(struct vector2f position,
float size);
void quadtreeInsert(struct quadtree* thisQuad,
struct boid *thisBoid);
void quadtreeUpdate(struct quadtree * thisQuad);
int quadIntersects(struct quadtree *thisQuad,
struct vector2f position, float size);
void quadQuery(struct quadQueryReturn *queryReturn,
struct quadtree *thisQuad, struct vector2f queryPosition,
float querySize);
struct quadQueryReturn *quadCreateReturnArray();
void quadQueryAddBoids(struct quadQueryReturn *thisReturn,
struct boid *boids[], struct vector2f queryPosition,
float querySize);
void quadtreeFree(struct quadtree *thisQuad);
void quadQueryFree(struct quadQueryReturn *thisQuery);
#endif