#include "quakedef.h" vec3_t vec3_origin = {0,0,0}; #define DEG2RAD( a ) (a*M_PI/180.0) float	anglemod(float a){	a = (360.0/65536.0) * ((int)(a*(65536.0/360.0)) & 65535);	return a;} /*================TransformVector================*/voidTransformVector(vec3_t in, vec3_t out, view_t *v){	out[0] = DotProduct(in, v->right);	out[1] = DotProduct(in, v->up);	out[2] = DotProduct(in, v->pn);} /*==================BoxOnPlaneSide Returns 1, 2, or 1 + 2==================*/int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, mplane_t *p){	float	dist1, dist2;	int		sides; 	// general case	switch (p->signbits)	{	case 0:		dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];		dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];		break;	case 1:		dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];		dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];		break;	case 2:		dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];		dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];		break;	case 3:		dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];		dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];		break;	case 4:		dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];		dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];		break;	case 5:		dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];		dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];		break;	case 6:		dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];		dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];		break;	case 7:		dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];		dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];		break;	default:		fatal ("BoxOnPlaneSide:  Bad signbits");		break;	} 	sides = 0;	if (dist1 >= p->dist)		sides = 1;	if (dist2 < p->dist)		sides |= 2; #ifdef PARANOID	if (sides == 0)		fatal ("BoxOnPlaneSide: sides==0");#endif 	return sides;} void AngleVectors (vec3_t angles, vec3_t forward, vec3_t right, vec3_t up){	float angle, sr, sp, sy, cr, cp, cy; 	angle = angles[YAW] * (M_PI*2 / 360.0);	sy = sinf(angle);	cy = cosf(angle);	angle = angles[PITCH] * (M_PI*2 / 360.0);	sp = sinf(angle);	cp = cosf(angle);	angle = angles[ROLL] * (M_PI*2 / 360.0);	sr = sinf(angle);	cr = cosf(angle); 	forward[0] = cp*cy;	forward[1] = cp*sy;	forward[2] = -sp;	right[0] = (-1*sr*sp*cy+-1*cr*-sy);	right[1] = (-1*sr*sp*sy+-1*cr*cy);	right[2] = -1*sr*cp;	up[0] = (cr*sp*cy+-sr*-sy);	up[1] = (cr*sp*sy+-sr*cy);	up[2] = cr*cp;} void VectorMA (vec3_t veca, float scale, vec3_t vecb, vec3_t vecc){	vecc[0] = veca[0] + scale*vecb[0];	vecc[1] = veca[1] + scale*vecb[1];	vecc[2] = veca[2] + scale*vecb[2];} void CrossProduct (vec3_t v1, vec3_t v2, vec3_t cross){	cross[0] = v1[1]*v2[2] - v1[2]*v2[1];	cross[1] = v1[2]*v2[0] - v1[0]*v2[2];	cross[2] = v1[0]*v2[1] - v1[1]*v2[0];} vec_t Length(vec3_t v){	return sqrtf(v[0]*v[0] + v[1]*v[1] + v[2]*v[2]);} float VectorNormalize (vec3_t v){	float length, ilength; 	length = sqrtf(v[0]*v[0] + v[1]*v[1] + v[2]*v[2]);	if(length != 0){		ilength = 1/length;		v[0] *= ilength;		v[1] *= ilength;		v[2] *= ilength;	} 	return length; } void VectorInverse (vec3_t v){	v[0] = -v[0];	v[1] = -v[1];	v[2] = -v[2];} void VectorScale (vec3_t in, vec_t scale, vec3_t out){	out[0] = in[0]*scale;	out[1] = in[1]*scale;	out[2] = in[2]*scale;} /*================R_ConcatRotations================*/void R_ConcatRotations (float in1[3][3], float in2[3][3], float out[3][3]){	out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] + in1[0][2] * in2[2][0];	out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] + in1[0][2] * in2[2][1];	out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] + in1[0][2] * in2[2][2];	out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] + in1[1][2] * in2[2][0];	out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] + in1[1][2] * in2[2][1];	out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] + in1[1][2] * in2[2][2];	out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] + in1[2][2] * in2[2][0];	out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] + in1[2][2] * in2[2][1];	out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] + in1[2][2] * in2[2][2];}  /*================R_ConcatTransforms================*/void R_ConcatTransforms (float in1[3][4], float in2[3][4], float out[3][4]){	out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] + in1[0][2] * in2[2][0];	out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] + in1[0][2] * in2[2][1];	out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] + in1[0][2] * in2[2][2];	out[0][3] = in1[0][0] * in2[0][3] + in1[0][1] * in2[1][3] + in1[0][2] * in2[2][3] + in1[0][3];	out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] + in1[1][2] * in2[2][0];	out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] + in1[1][2] * in2[2][1];	out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] + in1[1][2] * in2[2][2];	out[1][3] = in1[1][0] * in2[0][3] + in1[1][1] * in2[1][3] + in1[1][2] * in2[2][3] + in1[1][3];	out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] + in1[2][2] * in2[2][0];	out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] + in1[2][2] * in2[2][1];	out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] + in1[2][2] * in2[2][2];	out[2][3] = in1[2][0] * in2[0][3] + in1[2][1] * in2[1][3] + in1[2][2] * in2[2][3] + in1[2][3];}  /*===================FloorDivMod Returns mathematically correct (floor-based) quotient and remainder fornumer and denom, both of which should contain no fractional part. Thequotient must fit in 32 bits.====================*/ void FloorDivMod (double numer, double denom, int *quotient, int *rem){	int		q, r;	double	x; #ifdef PARANOID	if (denom <= 0.0)		fatal ("FloorDivMod: bad denominator %d\n", denom);	if (floor(numer) != numer || floor(denom) != denom)		fatal ("FloorDivMod: non-integer numer or denom %f %f\n", numer, denom);#endif 	if (numer >= 0.0)	{ 		x = floor(numer / denom);		q = (int)x;		r = (int)floor(numer - (x * denom));	}	else	{		// perform operations with positive values, and fix mod to make floor-based		x = floor(-numer / denom);		q = -(int)x;		r = (int)floor(-numer - (x * denom));		if (r != 0)		{			q--;			r = (int)denom - r;		}	} 	*quotient = q;	*rem = r;}  /*===================GreatestCommonDivisor====================*/int GreatestCommonDivisor (int i1, int i2){	if (i1 > i2)	{		if (i2 == 0)			return (i1);		return GreatestCommonDivisor (i2, i1 % i2);	}	else	{		if (i1 == 0)			return (i2);		return GreatestCommonDivisor (i1, i2 % i1);	}}