/*
===========================================================================
Copyright (C) 2010 James Canete (use.less01@gmail.com)

This file is part of Quake III Arena source code.

Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.

Quake III Arena source code is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/
// tr_extramath.h

#ifndef __TR_EXTRAMATH_H__
#define __TR_EXTRAMATH_H__

typedef vec_t mat4_t[16];
typedef int ivec2_t[2];
typedef int ivec3_t[3];
typedef int ivec4_t[4];

void Mat4Zero( mat4_t out );
void Mat4Identity( mat4_t out );
void Mat4Copy( const mat4_t in, mat4_t out );
void Mat4Multiply( const mat4_t in1, const mat4_t in2, mat4_t out );
void Mat4Transform( const mat4_t in1, const vec4_t in2, vec4_t out );
qboolean Mat4Compare(const mat4_t a, const mat4_t b);
void Mat4Dump( const mat4_t in );
void Mat4Translation( vec3_t vec, mat4_t out );
void Mat4Ortho( float left, float right, float bottom, float top, float znear, float zfar, mat4_t out );
void Mat4View(vec3_t axes[3], vec3_t origin, mat4_t out);
void Mat4SimpleInverse( const mat4_t in, mat4_t out);

#define VectorCopy2(a,b)		((b)[0]=(a)[0],(b)[1]=(a)[1])
#define VectorSet2(v,x,y)       ((v)[0]=(x),(v)[1]=(y));

#define OffsetByteToFloat(a)    ((float)(a) * 1.0f/127.5f - 1.0f)
#define FloatToOffsetByte(a)    (byte)((a) * 127.5f + 128.0f)
#define ByteToFloat(a)          ((float)(a) * 1.0f/255.0f)
#define FloatToByte(a)          (byte)((a) * 255.0f)

void VectorLerp( const vec3_t a, const vec3_t b, float lerp, vec3_t c);


qboolean SpheresIntersect(vec3_t origin1, float radius1, vec3_t origin2, float radius2);
void BoundingSphereOfSpheres(vec3_t origin1, float radius1, vec3_t origin2, float radius2, vec3_t origin3, float *radius3);

#ifndef SGN
#define SGN(x) (((x) >= 0) ? !!(x) : -1)
#endif

#ifndef MAX
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif

#ifndef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif

#ifndef CLAMP
#define CLAMP(a,b,c) MIN(MAX((a),(b)),(c))
#endif

int NextPowerOfTwo(int in);
unsigned short FloatToHalf(float in);

#endif