g_math.h

来自「著名物理引擎Hawk的源代码」· C头文件 代码 · 共 46 行

/* G_math.h, HAWK game engine
 *
 * Copyright 1997-1998 by Phil Frisbie, Jr.
 * for Hawk Software
 *
 */

#ifndef G_MATH_H
#define G_MATH_H

#include <math.h>
#include "hawk.h"

#define	EQUAL_EPSILON	0.001

BOOL VectorCompare (vec3_t v1, vec3_t v2);

#define DotProduct(x,y) (x[0]*y[0]+x[1]*y[1]+x[2]*y[2])
#define VectorSubtract(a,b,c) {c[0]=a[0]-b[0];c[1]=a[1]-b[1];c[2]=a[2]-b[2];}
#define VectorAdd(a,b,c) {c[0]=a[0]+b[0];c[1]=a[1]+b[1];c[2]=a[2]+b[2];}
#define VectorCopy(a,b) {b[0]=a[0];b[1]=a[1];b[2]=a[2];}
#define VectorScale(a,b,c) {c[0]=b*a[0];c[1]=b*a[1];c[2]=b*a[2];}
#define VectorClear(x) {x[0] = x[1] = x[2] = 0;}
#define	VectorNegate(x) {x[0]=-x[0];x[1]=-x[1];x[2]=-x[2];}

vec_t Q_rint (vec_t in);
vec_t _DotProduct (vec3_t v1, vec3_t v2);
void _VectorSubtract (vec3_t va, vec3_t vb, vec3_t out);
void _VectorAdd (vec3_t va, vec3_t vb, vec3_t out);
void _VectorCopy (vec3_t in, vec3_t out);
void _VectorScale (vec3_t v, vec_t scale, vec3_t out);

double VectorLength(vec3_t v);

void VectorMA (vec3_t va, double scale, vec3_t vb, vec3_t vc);

void CrossProduct (vec3_t v1, vec3_t v2, vec3_t cross);
vec_t VectorNormalize (vec3_t in, vec3_t out);
vec_t ColorNormalize (vec3_t in, vec3_t out);
void VectorInverse (vec3_t v);

void ClearBounds (vec3_t mins, vec3_t maxs);
void AddPointToBounds (vec3_t v, vec3_t mins, vec3_t maxs);

#endif /* G_MATH_H */