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#ifndef COLLISION_HANDLER_H
#define COLLISION_HANDLER_H
#include "creg/creg_cond.h"
struct CollisionVolume;
class CUnit;
class CFeature;
struct LocalModelPiece;
#include <list>
struct CollisionQuery {
CollisionQuery() {
// (0, 0, 0) is volume-space center, so
// impossible to obtain as actual points
// except in the special cases
b0 = false; t0 = 0.0f; p0 = ZeroVector;
b1 = false; t1 = 0.0f; p1 = ZeroVector;
lmp = NULL;
}
bool b0, b1; // true if ingress (b0) or egress (b1) point on ray segment
float t0, t1; // distance parameter for ingress and egress point
float3 p0, p1; // ray-volume ingress and egress points
LocalModelPiece* lmp; // impacted piece
};
// responsible for detecting hits between projectiles
// and world objects (units, features), each WO has a
// collision volume
class CCollisionHandler {
public:
CR_DECLARE(CCollisionHandler)
CCollisionHandler() {}
~CCollisionHandler() {}
static bool DetectHit(const CUnit*, const float3&, const float3&, CollisionQuery* q = NULL);
static bool DetectHit(const CFeature*, const float3&, const float3&, CollisionQuery* q = NULL);
static bool MouseHit(const CUnit*, const float3&, const float3&, const CollisionVolume*, CollisionQuery*);
static bool Intersect(const CUnit*, const float3&, const float3&, CollisionQuery*);
static bool Intersect(const CFeature*, const float3&, const float3&, CollisionQuery*);
private:
static bool Collision(const CUnit*, const float3&);
static bool Collision(const CFeature*, const float3&);
static bool Collision(const CollisionVolume*, const CMatrix44f&, const float3&);
static bool CollisionFootprint(const CSolidObject*, const float3&);
static bool Intersect(const CollisionVolume*, const CMatrix44f&, const float3&, const float3&, CollisionQuery*);
static bool IntersectPieceTree(const CUnit*, const float3&, const float3&, CollisionQuery*);
static void IntersectPieceTreeHelper(LocalModelPiece*, CMatrix44f, const float3&, const float3&, std::list<CollisionQuery>*);
static bool IntersectEllipsoid(const CollisionVolume*, const float3&, const float3&, CollisionQuery*);
static bool IntersectCylinder(const CollisionVolume*, const float3&, const float3&, CollisionQuery*);
static bool IntersectBox(const CollisionVolume*, const float3&, const float3&, CollisionQuery*);
static unsigned int numCollisionTests;
static unsigned int numIntersectionTests;
};
#endif
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