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100 lines
3.2 KiB
100 lines
3.2 KiB
/*** |
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* |
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* Copyright (c) 1996-2002, Valve LLC. All rights reserved. |
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* |
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* This product contains software technology licensed from Id |
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* Software, Inc. ("Id Technology"). Id Technology (c) 1996 Id Software, Inc. |
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* All Rights Reserved. |
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* |
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* Use, distribution, and modification of this source code and/or resulting |
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* object code is restricted to non-commercial enhancements to products from |
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* Valve LLC. All other use, distribution, or modification is prohibited |
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* without written permission from Valve LLC. |
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* |
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****/ |
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// mathlib.h |
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#include <math.h> |
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typedef float vec_t; |
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typedef vec_t vec2_t[2]; |
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#ifndef DID_VEC3_T_DEFINE |
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#define DID_VEC3_T_DEFINE |
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typedef vec_t vec3_t[3]; |
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#endif |
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typedef vec_t vec4_t[4]; // x,y,z,w |
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#ifndef M_PI |
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#define M_PI 3.14159265358979323846 // matches value in gcc v2 math.h |
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#endif |
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struct mplane_s; |
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extern vec3_t vec3_origin; |
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extern int nanmask; |
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#define IS_NAN(x) (((*(int *)&x)&nanmask)==nanmask) |
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#ifndef VECTOR_H |
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#define DotProduct(x,y) ((x)[0]*(y)[0]+(x)[1]*(y)[1]+(x)[2]*(y)[2]) |
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#endif |
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#define VectorSubtract(a,b,c) {(c)[0]=(a)[0]-(b)[0];(c)[1]=(a)[1]-(b)[1];(c)[2]=(a)[2]-(b)[2];} |
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#define VectorAdd(a,b,c) {(c)[0]=(a)[0]+(b)[0];(c)[1]=(a)[1]+(b)[1];(c)[2]=(a)[2]+(b)[2];} |
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#define VectorCopy(a,b) {(b)[0]=(a)[0];(b)[1]=(a)[1];(b)[2]=(a)[2];} |
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#define VectorClear(a) {(a)[0]=0.0;(a)[1]=0.0;(a)[2]=0.0;} |
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void VectorMA (const vec3_t veca, float scale, const vec3_t vecb, vec3_t vecc); |
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vec_t _DotProduct (vec3_t v1, vec3_t v2); |
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void _VectorSubtract (vec3_t veca, vec3_t vecb, vec3_t out); |
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void _VectorAdd (vec3_t veca, vec3_t vecb, vec3_t out); |
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void _VectorCopy (vec3_t in, vec3_t out); |
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int VectorCompare (const vec3_t v1, const vec3_t v2); |
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float Length (const vec3_t v); |
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void CrossProduct (const vec3_t v1, const vec3_t v2, vec3_t cross); |
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float VectorNormalize (vec3_t v); // returns vector length |
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void VectorInverse (vec3_t v); |
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void VectorScale (const vec3_t in, vec_t scale, vec3_t out); |
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void R_ConcatRotations (float in1[3][3], float in2[3][3], float out[3][3]); |
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void R_ConcatTransforms (float in1[3][4], float in2[3][4], float out[3][4]); |
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void AngleVectors (const vec3_t angles, vec3_t forward, vec3_t right, vec3_t up); |
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void AngleVectorsTranspose (const vec3_t angles, vec3_t forward, vec3_t right, vec3_t up); |
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#define AngleIVectors AngleVectorsTranspose |
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void AngleMatrix (const vec3_t angles, float (*matrix)[4] ); |
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void AngleIMatrix (const vec3_t angles, float (*matrix)[4] ); |
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void VectorTransform (const vec3_t in1, float in2[3][4], vec3_t out); |
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void NormalizeAngles( vec3_t angles ); |
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void InterpolateAngles( vec3_t start, vec3_t end, vec3_t output, float frac ); |
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float AngleBetweenVectors( const vec3_t v1, const vec3_t v2 ); |
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void VectorMatrix( vec3_t forward, vec3_t right, vec3_t up); |
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void VectorAngles( const vec3_t forward, vec3_t angles ); |
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int InvertMatrix( const float * m, float *out ); |
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int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, struct mplane_s *plane); |
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float anglemod(float a); |
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#define BOX_ON_PLANE_SIDE(emins, emaxs, p) \ |
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(((p)->type < 3)? \ |
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( \ |
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((p)->dist <= (emins)[(p)->type])? \ |
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1 \ |
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: \ |
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( \ |
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((p)->dist >= (emaxs)[(p)->type])?\ |
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2 \ |
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: \ |
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3 \ |
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) \ |
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) \ |
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: \ |
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BoxOnPlaneSide( (emins), (emaxs), (p)))
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