mirror of
https://github.com/w23/xash3d-fwgs
synced 2024-12-15 05:29:51 +01:00
Alibek Omarov
7429a6bc8a
git-subtree-dir: ref_soft git-subtree-mainline:89ca0dec5e
git-subtree-split:9045657352
268 lines
7.5 KiB
C
268 lines
7.5 KiB
C
/*
|
|
gl_rmath.c - renderer mathlib
|
|
Copyright (C) 2010 Uncle Mike
|
|
|
|
This program 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 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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.
|
|
*/
|
|
|
|
#include "r_local.h"
|
|
#include "xash3d_mathlib.h"
|
|
|
|
/*
|
|
========================================================================
|
|
|
|
Matrix4x4 operations (private to renderer)
|
|
|
|
========================================================================
|
|
*/
|
|
void Matrix4x4_Concat( matrix4x4 out, const matrix4x4 in1, const matrix4x4 in2 )
|
|
{
|
|
out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] + in1[0][2] * in2[2][0] + in1[0][3] * in2[3][0];
|
|
out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] + in1[0][2] * in2[2][1] + in1[0][3] * in2[3][1];
|
|
out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] + in1[0][2] * in2[2][2] + in1[0][3] * in2[3][2];
|
|
out[0][3] = in1[0][0] * in2[0][3] + in1[0][1] * in2[1][3] + in1[0][2] * in2[2][3] + in1[0][3] * in2[3][3];
|
|
out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] + in1[1][2] * in2[2][0] + in1[1][3] * in2[3][0];
|
|
out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] + in1[1][2] * in2[2][1] + in1[1][3] * in2[3][1];
|
|
out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] + in1[1][2] * in2[2][2] + in1[1][3] * in2[3][2];
|
|
out[1][3] = in1[1][0] * in2[0][3] + in1[1][1] * in2[1][3] + in1[1][2] * in2[2][3] + in1[1][3] * in2[3][3];
|
|
out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] + in1[2][2] * in2[2][0] + in1[2][3] * in2[3][0];
|
|
out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] + in1[2][2] * in2[2][1] + in1[2][3] * in2[3][1];
|
|
out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] + in1[2][2] * in2[2][2] + in1[2][3] * in2[3][2];
|
|
out[2][3] = in1[2][0] * in2[0][3] + in1[2][1] * in2[1][3] + in1[2][2] * in2[2][3] + in1[2][3] * in2[3][3];
|
|
out[3][0] = in1[3][0] * in2[0][0] + in1[3][1] * in2[1][0] + in1[3][2] * in2[2][0] + in1[3][3] * in2[3][0];
|
|
out[3][1] = in1[3][0] * in2[0][1] + in1[3][1] * in2[1][1] + in1[3][2] * in2[2][1] + in1[3][3] * in2[3][1];
|
|
out[3][2] = in1[3][0] * in2[0][2] + in1[3][1] * in2[1][2] + in1[3][2] * in2[2][2] + in1[3][3] * in2[3][2];
|
|
out[3][3] = in1[3][0] * in2[0][3] + in1[3][1] * in2[1][3] + in1[3][2] * in2[2][3] + in1[3][3] * in2[3][3];
|
|
}
|
|
|
|
/*
|
|
================
|
|
Matrix4x4_CreateProjection
|
|
|
|
NOTE: produce quake style world orientation
|
|
================
|
|
*/
|
|
void Matrix4x4_CreateProjection( matrix4x4 out, float xMax, float xMin, float yMax, float yMin, float zNear, float zFar )
|
|
{
|
|
out[0][0] = ( 2.0f * zNear ) / ( xMax - xMin );
|
|
out[1][1] = ( 2.0f * zNear ) / ( yMax - yMin );
|
|
out[2][2] = -( zFar + zNear ) / ( zFar - zNear );
|
|
out[3][3] = out[0][1] = out[1][0] = out[3][0] = out[0][3] = out[3][1] = out[1][3] = 0.0f;
|
|
|
|
out[2][0] = 0.0f;
|
|
out[2][1] = 0.0f;
|
|
out[0][2] = ( xMax + xMin ) / ( xMax - xMin );
|
|
out[1][2] = ( yMax + yMin ) / ( yMax - yMin );
|
|
out[3][2] = -1.0f;
|
|
out[2][3] = -( 2.0f * zFar * zNear ) / ( zFar - zNear );
|
|
}
|
|
|
|
void Matrix4x4_CreateOrtho( matrix4x4 out, float xLeft, float xRight, float yBottom, float yTop, float zNear, float zFar )
|
|
{
|
|
out[0][0] = 2.0f / (xRight - xLeft);
|
|
out[1][1] = 2.0f / (yTop - yBottom);
|
|
out[2][2] = -2.0f / (zFar - zNear);
|
|
out[3][3] = 1.0f;
|
|
out[0][1] = out[0][2] = out[1][0] = out[1][2] = out[3][0] = out[3][1] = out[3][2] = 0.0f;
|
|
|
|
out[2][0] = 0.0f;
|
|
out[2][1] = 0.0f;
|
|
out[0][3] = -(xRight + xLeft) / (xRight - xLeft);
|
|
out[1][3] = -(yTop + yBottom) / (yTop - yBottom);
|
|
out[2][3] = -(zFar + zNear) / (zFar - zNear);
|
|
}
|
|
|
|
/*
|
|
================
|
|
Matrix4x4_CreateModelview
|
|
|
|
NOTE: produce quake style world orientation
|
|
================
|
|
*/
|
|
void Matrix4x4_CreateModelview( matrix4x4 out )
|
|
{
|
|
out[0][0] = out[1][1] = out[2][2] = 0.0f;
|
|
out[3][0] = out[0][3] = 0.0f;
|
|
out[3][1] = out[1][3] = 0.0f;
|
|
out[3][2] = out[2][3] = 0.0f;
|
|
out[3][3] = 1.0f;
|
|
out[1][0] = out[0][2] = out[2][1] = 0.0f;
|
|
out[2][0] = out[0][1] = -1.0f;
|
|
out[1][2] = 1.0f;
|
|
}
|
|
|
|
void Matrix4x4_ToArrayFloatGL( const matrix4x4 in, float out[16] )
|
|
{
|
|
out[ 0] = in[0][0];
|
|
out[ 1] = in[1][0];
|
|
out[ 2] = in[2][0];
|
|
out[ 3] = in[3][0];
|
|
out[ 4] = in[0][1];
|
|
out[ 5] = in[1][1];
|
|
out[ 6] = in[2][1];
|
|
out[ 7] = in[3][1];
|
|
out[ 8] = in[0][2];
|
|
out[ 9] = in[1][2];
|
|
out[10] = in[2][2];
|
|
out[11] = in[3][2];
|
|
out[12] = in[0][3];
|
|
out[13] = in[1][3];
|
|
out[14] = in[2][3];
|
|
out[15] = in[3][3];
|
|
}
|
|
|
|
void Matrix4x4_FromArrayFloatGL( matrix4x4 out, const float in[16] )
|
|
{
|
|
out[0][0] = in[0];
|
|
out[1][0] = in[1];
|
|
out[2][0] = in[2];
|
|
out[3][0] = in[3];
|
|
out[0][1] = in[4];
|
|
out[1][1] = in[5];
|
|
out[2][1] = in[6];
|
|
out[3][1] = in[7];
|
|
out[0][2] = in[8];
|
|
out[1][2] = in[9];
|
|
out[2][2] = in[10];
|
|
out[3][2] = in[11];
|
|
out[0][3] = in[12];
|
|
out[1][3] = in[13];
|
|
out[2][3] = in[14];
|
|
out[3][3] = in[15];
|
|
}
|
|
|
|
void Matrix4x4_CreateTranslate( matrix4x4 out, float x, float y, float z )
|
|
{
|
|
out[0][0] = 1.0f;
|
|
out[0][1] = 0.0f;
|
|
out[0][2] = 0.0f;
|
|
out[0][3] = x;
|
|
out[1][0] = 0.0f;
|
|
out[1][1] = 1.0f;
|
|
out[1][2] = 0.0f;
|
|
out[1][3] = y;
|
|
out[2][0] = 0.0f;
|
|
out[2][1] = 0.0f;
|
|
out[2][2] = 1.0f;
|
|
out[2][3] = z;
|
|
out[3][0] = 0.0f;
|
|
out[3][1] = 0.0f;
|
|
out[3][2] = 0.0f;
|
|
out[3][3] = 1.0f;
|
|
}
|
|
|
|
void Matrix4x4_CreateRotate( matrix4x4 out, float angle, float x, float y, float z )
|
|
{
|
|
float len, c, s;
|
|
|
|
len = x * x + y * y + z * z;
|
|
if( len != 0.0f ) len = 1.0f / sqrt( len );
|
|
x *= len;
|
|
y *= len;
|
|
z *= len;
|
|
|
|
angle *= (-M_PI_F / 180.0f);
|
|
SinCos( angle, &s, &c );
|
|
|
|
out[0][0]=x * x + c * (1 - x * x);
|
|
out[0][1]=x * y * (1 - c) + z * s;
|
|
out[0][2]=z * x * (1 - c) - y * s;
|
|
out[0][3]=0.0f;
|
|
out[1][0]=x * y * (1 - c) - z * s;
|
|
out[1][1]=y * y + c * (1 - y * y);
|
|
out[1][2]=y * z * (1 - c) + x * s;
|
|
out[1][3]=0.0f;
|
|
out[2][0]=z * x * (1 - c) + y * s;
|
|
out[2][1]=y * z * (1 - c) - x * s;
|
|
out[2][2]=z * z + c * (1 - z * z);
|
|
out[2][3]=0.0f;
|
|
out[3][0]=0.0f;
|
|
out[3][1]=0.0f;
|
|
out[3][2]=0.0f;
|
|
out[3][3]=1.0f;
|
|
}
|
|
|
|
void Matrix4x4_CreateScale( matrix4x4 out, float x )
|
|
{
|
|
out[0][0] = x;
|
|
out[0][1] = 0.0f;
|
|
out[0][2] = 0.0f;
|
|
out[0][3] = 0.0f;
|
|
out[1][0] = 0.0f;
|
|
out[1][1] = x;
|
|
out[1][2] = 0.0f;
|
|
out[1][3] = 0.0f;
|
|
out[2][0] = 0.0f;
|
|
out[2][1] = 0.0f;
|
|
out[2][2] = x;
|
|
out[2][3] = 0.0f;
|
|
out[3][0] = 0.0f;
|
|
out[3][1] = 0.0f;
|
|
out[3][2] = 0.0f;
|
|
out[3][3] = 1.0f;
|
|
}
|
|
|
|
void Matrix4x4_CreateScale3( matrix4x4 out, float x, float y, float z )
|
|
{
|
|
out[0][0] = x;
|
|
out[0][1] = 0.0f;
|
|
out[0][2] = 0.0f;
|
|
out[0][3] = 0.0f;
|
|
out[1][0] = 0.0f;
|
|
out[1][1] = y;
|
|
out[1][2] = 0.0f;
|
|
out[1][3] = 0.0f;
|
|
out[2][0] = 0.0f;
|
|
out[2][1] = 0.0f;
|
|
out[2][2] = z;
|
|
out[2][3] = 0.0f;
|
|
out[3][0] = 0.0f;
|
|
out[3][1] = 0.0f;
|
|
out[3][2] = 0.0f;
|
|
out[3][3] = 1.0f;
|
|
}
|
|
|
|
void Matrix4x4_ConcatTranslate( matrix4x4 out, float x, float y, float z )
|
|
{
|
|
matrix4x4 base, temp;
|
|
|
|
Matrix4x4_Copy( base, out );
|
|
Matrix4x4_CreateTranslate( temp, x, y, z );
|
|
Matrix4x4_Concat( out, base, temp );
|
|
}
|
|
|
|
void Matrix4x4_ConcatRotate( matrix4x4 out, float angle, float x, float y, float z )
|
|
{
|
|
matrix4x4 base, temp;
|
|
|
|
Matrix4x4_Copy( base, out );
|
|
Matrix4x4_CreateRotate( temp, angle, x, y, z );
|
|
Matrix4x4_Concat( out, base, temp );
|
|
}
|
|
|
|
void Matrix4x4_ConcatScale( matrix4x4 out, float x )
|
|
{
|
|
matrix4x4 base, temp;
|
|
|
|
Matrix4x4_Copy( base, out );
|
|
Matrix4x4_CreateScale( temp, x );
|
|
Matrix4x4_Concat( out, base, temp );
|
|
}
|
|
|
|
void Matrix4x4_ConcatScale3( matrix4x4 out, float x, float y, float z )
|
|
{
|
|
matrix4x4 base, temp;
|
|
|
|
Matrix4x4_Copy( base, out );
|
|
Matrix4x4_CreateScale3( temp, x, y, z );
|
|
Matrix4x4_Concat( out, base, temp );
|
|
}
|