105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/***
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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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****/
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#ifndef __MATHLIB__
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#define __MATHLIB__
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// mathlib.h
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#include <math.h>
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#ifdef DOUBLEVEC_T
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typedef double vec_t;
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#else
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typedef float vec_t;
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#endif
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typedef vec_t vec3_t[3]; // x,y,z
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typedef vec_t vec4_t[4]; // x,y,z,w
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#define SIDE_FRONT 0
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#define SIDE_ON 2
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#define SIDE_BACK 1
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#define SIDE_CROSS -2
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#define Q_PI 3.14159265358979323846
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extern vec3_t vec3_origin;
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// Use this definition globally
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#define ON_EPSILON 0.01
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#define EQUAL_EPSILON 0.001
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int VectorCompare(vec3_t v1, vec3_t v2);
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#define DotProduct(x, y) ((x)[0] * (y)[0] + (x)[1] * (y)[1] + (x)[2] * (y)[2])
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#define VectorFill(a, b) \
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{ \
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(a)[0] = (b); \
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(a)[1] = (b); \
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(a)[2] = (b); \
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}
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#define VectorAvg(a) (((a)[0] + (a)[1] + (a)[2]) / 3)
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#define VectorSubtract(a, b, c) \
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{ \
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(c)[0] = (a)[0] - (b)[0]; \
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(c)[1] = (a)[1] - (b)[1]; \
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(c)[2] = (a)[2] - (b)[2]; \
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}
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#define VectorAdd(a, b, c) \
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{ \
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(c)[0] = (a)[0] + (b)[0]; \
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(c)[1] = (a)[1] + (b)[1]; \
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(c)[2] = (a)[2] + (b)[2]; \
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}
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#define VectorCopy(a, b) \
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{ \
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(b)[0] = (a)[0]; \
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(b)[1] = (a)[1]; \
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(b)[2] = (a)[2]; \
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}
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#define VectorScale(a, b, c) \
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{ \
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(c)[0] = (b) * (a)[0]; \
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(c)[1] = (b) * (a)[1]; \
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(c)[2] = (b) * (a)[2]; \
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}
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vec_t Q_rint(vec_t in);
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vec_t _DotProduct(vec3_t v1, vec3_t v2);
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void _VectorSubtract(vec3_t va, vec3_t vb, vec3_t out);
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void _VectorAdd(vec3_t va, vec3_t vb, vec3_t out);
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void _VectorCopy(vec3_t in, vec3_t out);
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void _VectorScale(vec3_t v, vec_t scale, vec3_t out);
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double VectorLength(vec3_t v);
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void VectorMA(vec3_t va, double scale, vec3_t vb, vec3_t vc);
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void CrossProduct(vec3_t v1, vec3_t v2, vec3_t cross);
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vec_t VectorNormalize(vec3_t v);
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void VectorInverse(vec3_t v);
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void ClearBounds(vec3_t mins, vec3_t maxs);
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void AddPointToBounds(vec3_t v, vec3_t mins, vec3_t maxs);
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void AngleMatrix(const vec3_t angles, float matrix[3][4]);
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void AngleIMatrix(const vec3_t angles, float matrix[3][4]);
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void R_ConcatTransforms(const float in1[3][4], const float in2[3][4], float out[3][4]);
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void VectorIRotate(const vec3_t in1, const float in2[3][4], vec3_t out);
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void VectorRotate(const vec3_t in1, const float in2[3][4], vec3_t out);
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void VectorTransform(const vec3_t in1, const float in2[3][4], vec3_t out);
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void AngleQuaternion(const vec3_t angles, vec4_t quaternion);
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void QuaternionMatrix(const vec4_t quaternion, float (*matrix)[4]);
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void QuaternionSlerp(const vec4_t p, vec4_t q, float t, vec4_t qt);
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#endif
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