/* ========================================================================== * 작 성 자 : 이순규 * 작 성 일 : 2006.12.07 * 내 용 : 구 * 주의사항 : *===========================================================================*/ #pragma once #include "Box.h" /// 구 /// 주로 교차 검사 및 가시 검사를 위한 경계 구로 사용된다. /// 구의 중심점과 반지름으로 정의한다. class cSphere { public: cSphere(); cSphere( const NiPoint3& center, float radius ); cSphere( float x, float y, float z, float radius ); cSphere( const cSphere& other ); /// 설정 void Set( const NiPoint3& center, float radius ); void Set( float x, float y, float z, float radius ); /// 중심점 void SetCenter( const NiPoint3& center ); const NiPoint3& GetCenter() const; /// 반지름 void SetRadius( float radius ); float GetRadius() const; float GetRadius2() const; /// 교차 검사 /// 주의: 반직선의 원점이 구 안에 있을 때는 거리 제한을 무시하고 무조건 충돌한 것으로 본다. bool IntersectRay( const cRay& ray ) const; bool IntersectRay( const cRay& ray, float maxDistance ) const; bool IntersectRay( NiPoint3* out, float* dist, const cRay& ray ) const; bool IntersectRay( NiPoint3* out, float* dist, const cRay& ray, float maxDistance ) const; bool IntersectLine( const NiPoint3& start, const NiPoint3& end ) const; bool IntersectPlane( const NiPlane& plane ) const; bool IntersectSphere( const cSphere& sphere ) const; /// 포함 검사 bool ContainPoint( const NiPoint3& v ) const; bool ContainBox( const cBox& box ) const; bool ContainSphere( const cSphere& sphere ) const; /// 평면의 어느쪽 unsigned int WhichSide( const NiPlane& plane ) const; /// 한 점에서 중점까지의 거리 float GetDistance( const NiPoint3& point ) const; /// 한 점에서 중점까지의 거리의 제곱 float GetDistance2( const NiPoint3& point ) const; protected: /// 중심점 NiPoint3 mCenter; /// 반지름 float mRadius; /// 반지름의 제곱 float mRadius2; }; inline cSphere::cSphere() { } inline cSphere::cSphere( const NiPoint3& center, float radius ) { mCenter = center; mRadius = radius; mRadius2 = radius * radius; } inline cSphere::cSphere( float x, float y, float z, float radius ) { mCenter.x = x; mCenter.y = y; mCenter.z = z; mRadius = radius; mRadius2 = radius * radius; } inline cSphere::cSphere( const cSphere& other ) { mCenter = other.mCenter; mRadius = other.mRadius; mRadius2 = other.mRadius2; } inline void cSphere::Set( const NiPoint3& center, float radius ) { mCenter = center; mRadius = radius; mRadius2 = radius * radius; } inline void cSphere::Set( float x, float y, float z, float radius ) { mCenter.x = x; mCenter.y = y; mCenter.z = z; mRadius = radius; mRadius2 = radius * radius; } inline void cSphere::SetCenter( const NiPoint3& center ) { mCenter = center; } inline void cSphere::SetRadius( float radius ) { mRadius = radius; mRadius2 = radius * radius; } inline const NiPoint3& cSphere::GetCenter() const { return mCenter; } inline float cSphere::GetRadius() const { return mRadius; } inline float cSphere::GetRadius2() const { return mRadius2; } inline bool cSphere::IntersectPlane( const NiPlane& plane ) const { return NiAbs( plane.Distance(mCenter) ) <= mRadius; } inline bool cSphere::IntersectSphere( const cSphere& sphere ) const { NiPoint3 l = mCenter - sphere.GetCenter(); float r = mRadius + sphere.GetRadius(); return l.SqrLength() <= r * r; } inline bool cSphere::ContainPoint( const NiPoint3& v ) const { return (mCenter - v).SqrLength() <= mRadius2; } inline bool cSphere::ContainBox( const cBox& box ) const { return ContainPoint( box.GetMin() ) && ContainPoint( box.GetMax() ); } inline bool cSphere::ContainSphere(const cSphere& sphere) const { if( mRadius < sphere.mRadius ) return false; NiPoint3 l = mCenter - sphere.mCenter; float r = mRadius - sphere.mRadius; return l.SqrLength() <= r * r; } inline unsigned int cSphere::WhichSide( const NiPlane& plane ) const { float dist = plane.Distance( mCenter ); if( dist <= -mRadius ) return NiPlane::NEGATIVE_SIDE; else if( dist >= mRadius ) return NiPlane::POSITIVE_SIDE; else return NiPlane::NO_SIDE; } inline float cSphere::GetDistance( const NiPoint3& point ) const { return (mCenter - point).Length(); } inline float cSphere::GetDistance2( const NiPoint3& point ) const { return (mCenter - point).SqrLength(); }