nuclear@7: #ifndef GEOM_H_
nuclear@7: #define GEOM_H_
nuclear@7: 
nuclear@7: #include <vmath/vmath.h>
nuclear@7: 
nuclear@7: class GeomShape;
nuclear@7: 
nuclear@7: struct HitPoint {
nuclear@7: 	float dist;
nuclear@7: 	Vector3 pos;
nuclear@7: 	Vector3 normal;
nuclear@7: 	const GeomShape *shape;
nuclear@7: 	void *data;
nuclear@7: };
nuclear@7: 
nuclear@7: class GeomShape {
nuclear@8: public:
nuclear@8: 	enum Type { GEOM_UNKNOWN, GEOM_SPHERE, GEOM_PLANE, GEOM_AABOX };
nuclear@8: 
nuclear@7: protected:
nuclear@8: 	Matrix4x4 xform, inv_xform;
nuclear@8: 	Type type;
nuclear@7: 
nuclear@7: public:
nuclear@7: 	GeomShape();
nuclear@7: 	virtual ~GeomShape();
nuclear@7: 
nuclear@7: 	virtual Type get_type() const;
nuclear@7: 
nuclear@8: 	// apply an arbitrary transformation before testing intersections and collisions
nuclear@8: 	virtual void set_transform(const Matrix4x4 &m);
nuclear@8: 	virtual const Matrix4x4 &get_transform() const;
nuclear@8: 	virtual const Matrix4x4 &get_inv_transform() const;
nuclear@8: 
nuclear@8: 	virtual bool contains(const Vector3 &pt) const = 0;
nuclear@7: 	virtual bool intersect(const Ray &ray, HitPoint *hit = 0) const = 0;
nuclear@7: 	virtual bool collide(const GeomShape *geom, HitPoint *hit = 0) const = 0;
nuclear@7: 
nuclear@7: 	virtual float distance(const Vector3 &pt) const = 0;
nuclear@7: 	virtual float distance_sq(const Vector3 &pt) const = 0;
nuclear@8: 
nuclear@8: 	// visualize the shape
nuclear@8: 	virtual void draw() const = 0;
nuclear@7: };
nuclear@7: 
nuclear@7: class Sphere : public GeomShape {
nuclear@7: public:
nuclear@7: 	Vector3 center;
nuclear@7: 	float radius;
nuclear@7: 
nuclear@7: 	Sphere();
nuclear@7: 	Sphere(const Vector3 &c, float rad);
nuclear@7: 
nuclear@8: 	bool contains(const Vector3 &pt) const;
nuclear@7: 	bool intersect(const Ray &ray, HitPoint *hit = 0) const;
nuclear@7: 	bool collide(const GeomShape *geom, HitPoint *hit = 0) const;
nuclear@7: 
nuclear@7: 	float distance(const Vector3 &pt) const;
nuclear@7: 	float distance_sq(const Vector3 &pt) const;
nuclear@8: 
nuclear@8: 	void draw() const;
nuclear@7: };
nuclear@7: 
nuclear@7: class Plane : public GeomShape {
nuclear@7: public:
nuclear@7: 	Vector3 normal;
nuclear@7: 	float dist;
nuclear@7: 
nuclear@7: 	Plane();
nuclear@7: 	Plane(const Vector3 &n, float d);
nuclear@7: 	Plane(float a, float b, float c, float d);
nuclear@7: 	Plane(const Vector3 &pos, const Vector3 &norm);
nuclear@7: 	Plane(const Vector3 &p1, const Vector3 &p2, const Vector3 &p3);
nuclear@7: 
nuclear@8: 	bool contains(const Vector3 &pt) const;
nuclear@7: 	bool intersect(const Ray &ray, HitPoint *hit = 0) const;
nuclear@7: 	bool collide(const GeomShape *geom, HitPoint *hit = 0) const;
nuclear@7: 
nuclear@7: 	float distance(const Vector3 &pt) const;
nuclear@7: 	float distance_sq(const Vector3 &pt) const;
nuclear@8: 
nuclear@8: 	void draw() const;
nuclear@8: };
nuclear@8: 
nuclear@8: class AABox : public GeomShape {
nuclear@8: public:
nuclear@8: 	Vector3 min, max;
nuclear@8: 
nuclear@8: 	AABox();
nuclear@8: 	AABox(const Vector3 &min, const Vector3 &max);
nuclear@8: 
nuclear@8: 	void set_union(const GeomShape *obj1, const GeomShape *obj2);
nuclear@8: 	void set_intersection(const GeomShape *obj1, const GeomShape *obj2);
nuclear@8: 
nuclear@8: 	bool contains(const Vector3 &pt) const;
nuclear@8: 	bool intersect(const Ray &ray, HitPoint *hit = 0) const;
nuclear@8: 	bool collide(const GeomShape *geom, HitPoint *hit = 0) const;
nuclear@8: 
nuclear@8: 	float distance(const Vector3 &pt) const;
nuclear@8: 	float distance_sq(const Vector3 &pt) const;
nuclear@8: 
nuclear@8: 	void draw() const;
nuclear@7: };
nuclear@7: 
nuclear@7: #endif	// GEOM_H_