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- /***
- *
- * Copyright (c) 1998, Valve LLC. All rights reserved.
- *
- * This product contains software technology licensed from Id
- * Software, Inc. ("Id Technology"). Id Technology (c) 1996 Id Software, Inc.
- * All Rights Reserved.
- *
- ****/
-
- #ifndef __MATHLIB__
- #define __MATHLIB__
-
- // mathlib.h
-
- #include <math.h>
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- #ifdef DOUBLEVEC_T
- typedef double vec_t;
- #else
- typedef float vec_t;
- #endif
- typedef vec_t vec3_t[3]; // x,y,z
- typedef vec_t vec4_t[4]; // x,y,z,w
-
- #define SIDE_FRONT 0
- #define SIDE_ON 2
- #define SIDE_BACK 1
- #define SIDE_CROSS -2
-
- #define Q_PI 3.14159265358979323846
-
- extern vec3_t vec3_origin;
-
- // Use this definition globally
- #define ON_EPSILON 0.01
- #define EQUAL_EPSILON 0.001
-
- int VectorCompare (vec3_t v1, vec3_t v2);
-
- #define DotProduct(x,y) ((x)[0]*(y)[0]+(x)[1]*(y)[1]+(x)[2]*(y)[2])
- #define VectorFill(a,b) { (a)[0]=(b); (a)[1]=(b); (a)[2]=(b);}
- #define VectorAvg(a) ( ( (a)[0] + (a)[1] + (a)[2] ) / 3 )
- #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];}
-
- 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 v);
- void VectorInverse (vec3_t v);
-
- void ClearBounds (vec3_t mins, vec3_t maxs);
- void AddPointToBounds (vec3_t v, vec3_t mins, vec3_t maxs);
-
- void AngleMatrix (const vec3_t angles, float matrix[3][4] );
- void AngleIMatrix (const vec3_t angles, float matrix[3][4] );
- void R_ConcatTransforms (const float in1[3][4], const float in2[3][4], float out[3][4]);
-
- void VectorIRotate (const vec3_t in1, const float in2[3][4], vec3_t out);
- void VectorRotate (const vec3_t in1, const float in2[3][4], vec3_t out);
-
- void VectorTransform (const vec3_t in1, const float in2[3][4], vec3_t out);
-
- void AngleQuaternion( const vec3_t angles, vec4_t quaternion );
- void QuaternionMatrix( const vec4_t quaternion, float (*matrix)[4] );
- void QuaternionSlerp( const vec4_t p, vec4_t q, float t, vec4_t qt );
-
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif
-