ns/releases/3.02/source/cl_dll/studio_util.h

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#if !defined( STUDIO_UTIL_H )
#define STUDIO_UTIL_H
#if defined( WIN32 )
#pragma once
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846 // matches value in gcc v2 math.h
#endif
#ifndef PITCH
// MOVEMENT INFO
// up / down
#define PITCH 0
// left / right
#define YAW 1
// fall over
#define ROLL 2
#endif
#define FDotProduct( a, b ) (fabs((a[0])*(b[0])) + fabs((a[1])*(b[1])) + fabs((a[2])*(b[2])))
void AngleMatrix (const float *angles, float (*matrix)[4] );
int VectorCompare (const float *v1, const float *v2);
void CrossProduct (const float *v1, const float *v2, float *cross);
void VectorTransform (const float *in1, float in2[3][4], float *out);
void ConcatTransforms (float in1[3][4], float in2[3][4], float out[3][4]);
void MatrixCopy( float in[3][4], float out[3][4] );
void QuaternionMatrix( vec4_t quaternion, float (*matrix)[4] );
void QuaternionSlerp( vec4_t p, vec4_t q, float t, vec4_t qt );
void AngleQuaternion( float *angles, vec4_t quaternion );
#endif // STUDIO_UTIL_H