www.pudn.com > raytracer4.zip > common.h

// ----------------------------------------------------------- 
// common.h 
// 2004 - Jacco Bikker - jacco@bik5.com - www.bik5.com -   <>< 
// ----------------------------------------------------------- 
 
#ifndef I_COMMON_H 
#define I_COMMON_H 
 
#include "math.h" 
#include "stdlib.h" 
 
typedef unsigned int Pixel; 
 
inline float Rand( float a_Range ) { return ((float)rand() / RAND_MAX) * a_Range; } 
 
namespace Raytracer { 
 
#define DOT(A,B)		(A.x*B.x+A.y*B.y+A.z*B.z) 
#define NORMALIZE(A)	{float l=1/sqrtf(A.x*A.x+A.y*A.y+A.z*A.z);A.x*=l;A.y*=l;A.z*=l;} 
#define LENGTH(A)		(sqrtf(A.x*A.x+A.y*A.y+A.z*A.z)) 
#define SQRLENGTH(A)	(A.x*A.x+A.y*A.y+A.z*A.z) 
#define SQRDISTANCE(A,B) ((A.x-B.x)*(A.x-B.x)+(A.y-B.y)*(A.y-B.y)+(A.z-B.z)*(A.z-B.z)) 
 
#define GRIDSIZE		8 
#define GRIDSHFT		3 
#define EPSILON			0.001f 
#define TRACEDEPTH		6 
 
#define PI				3.141592653589793238462f 
 
class vector3 
{ 
public: 
	vector3() : x( 0.0f ), y( 0.0f ), z( 0.0f ) {}; 
	vector3( float a_X, float a_Y, float a_Z ) : x( a_X ), y( a_Y ), z( a_Z ) {}; 
	void Set( float a_X, float a_Y, float a_Z ) { x = a_X; y = a_Y; z = a_Z; } 
	void Normalize() { float l = 1.0f / Length(); x *= l; y *= l; z *= l; } 
	float Length() { return (float)sqrt( x * x + y * y + z * z ); } 
	float SqrLength() { return x * x + y * y + z * z; } 
	float Dot( vector3 a_V ) { return x * a_V.x + y * a_V.y + z * a_V.z; } 
	vector3 Cross( vector3 b ) { return vector3( y * b.z - z * b.y, z * b.x - x * b.z, x * b.y - y * b.x ); } 
	void operator += ( vector3& a_V ) { x += a_V.x; y += a_V.y; z += a_V.z; } 
	void operator += ( vector3* a_V ) { x += a_V->x; y += a_V->y; z += a_V->z; } 
	void operator -= ( vector3& a_V ) { x -= a_V.x; y -= a_V.y; z -= a_V.z; } 
	void operator -= ( vector3* a_V ) { x -= a_V->x; y -= a_V->y; z -= a_V->z; } 
	void operator *= ( float f ) { x *= f; y *= f; z *= f; } 
	void operator *= ( vector3& a_V ) { x *= a_V.x; y *= a_V.y; z *= a_V.z; } 
	void operator *= ( vector3* a_V ) { x *= a_V->x; y *= a_V->y; z *= a_V->z; } 
	vector3 operator- () const { return vector3( -x, -y, -z ); } 
	friend vector3 operator + ( const vector3& v1, const vector3& v2 ) { return vector3( v1.x + v2.x, v1.y + v2.y, v1.z + v2.z ); } 
	friend vector3 operator - ( const vector3& v1, const vector3& v2 ) { return vector3( v1.x - v2.x, v1.y - v2.y, v1.z - v2.z ); } 
	friend vector3 operator + ( const vector3& v1, vector3* v2 ) { return vector3( v1.x + v2->x, v1.y + v2->y, v1.z + v2->z ); } 
	friend vector3 operator - ( const vector3& v1, vector3* v2 ) { return vector3( v1.x - v2->x, v1.y - v2->y, v1.z - v2->z ); } 
	friend vector3 operator * ( const vector3& v, float f ) { return vector3( v.x * f, v.y * f, v.z * f ); } 
	friend vector3 operator * ( const vector3& v1, vector3& v2 ) { return vector3( v1.x * v2.x, v1.y * v2.y, v1.z * v2.z ); } 
	friend vector3 operator * ( float f, const vector3& v ) { return vector3( v.x * f, v.y * f, v.z * f ); } 
	union 
	{ 
		struct { float x, y, z; }; 
		struct { float r, g, b; }; 
		struct { float cell[3]; }; 
	}; 
}; 
 
class plane 
{ 
public: 
	plane() : N( 0, 0, 0 ), D( 0 ) {}; 
	plane( vector3 a_Normal, float a_D ) : N( a_Normal ), D( a_D ) {}; 
	union 
	{ 
		struct 
		{ 
			vector3 N; 
			float D; 
		}; 
		float cell[4]; 
	}; 
}; 
 
class aabb 
{ 
public: 
	aabb() : m_Pos( vector3( 0, 0, 0 ) ), m_Size( vector3( 0, 0, 0 ) ) {}; 
	aabb( vector3& a_Pos, vector3& a_Size ) : m_Pos( a_Pos ), m_Size( a_Size ) {}; 
	vector3& GetPos() { return m_Pos; } 
	vector3& GetSize() { return m_Size; } 
	bool Intersect( aabb& b2 ) 
	{ 
		vector3 v1 = b2.GetPos(), v2 = b2.GetPos() + b2.GetSize(); 
		vector3 v3 = m_Pos, v4 = m_Pos + m_Size; 
		return ((v4.x > v1.x) && (v3.x < v2.x) && // x-axis overlap 
				(v4.y > v1.y) && (v3.y < v2.y) && // y-axis overlap 
				(v4.z > v1.z) && (v3.z < v2.z));   // z-axis overlap 
	} 
	bool Contains( vector3 a_Pos ) 
	{ 
		vector3 v1 = m_Pos, v2 = m_Pos + m_Size; 
		return ((a_Pos.x > (v1.x - EPSILON)) && (a_Pos.x < (v2.x + EPSILON)) && 
				(a_Pos.y > (v1.y - EPSILON)) && (a_Pos.y < (v2.y + EPSILON)) && 
				(a_Pos.z > (v1.z - EPSILON)) && (a_Pos.z < (v2.z + EPSILON))); 
	} 
private: 
	vector3 m_Pos, m_Size; 
}; 
 
typedef vector3 Color; 
 
}; // namespace Raytracer 
 
#endif