/*
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#version 120
// Forward declaration because builtins don't know about other builtins.
float dot(vec4, vec4);
float determinant(mat2 m)
{
return m[0][0] * m[1][1] - m[1][0] * m[0][1];
}
float determinant(mat3 m)
{
return (+ m[0][0] * (m[1][1] * m[2][2] - m[1][2] * m[2][1])
- m[0][1] * (m[1][0] * m[2][2] - m[1][2] * m[2][0])
+ m[0][2] * (m[1][0] * m[2][1] - m[1][1] * m[2][0]));
}
float determinant(mat4 m)
{
float SubFactor00 = m[2][2] * m[3][3] - m[3][2] * m[2][3];
float SubFactor01 = m[2][1] * m[3][3] - m[3][1] * m[2][3];
float SubFactor02 = m[2][1] * m[3][2] - m[3][1] * m[2][2];
float SubFactor03 = m[2][0] * m[3][3] - m[3][0] * m[2][3];
float SubFactor04 = m[2][0] * m[3][2] - m[3][0] * m[2][2];
float SubFactor05 = m[2][0] * m[3][1] - m[3][0] * m[2][1];
float SubFactor06 = m[1][2] * m[3][3] - m[3][2] * m[1][3];
float SubFactor07 = m[1][1] * m[3][3] - m[3][1] * m[1][3];
float SubFactor08 = m[1][1] * m[3][2] - m[3][1] * m[1][2];
float SubFactor09 = m[1][0] * m[3][3] - m[3][0] * m[1][3];
float SubFactor10 = m[1][0] * m[3][2] - m[3][0] * m[1][2];
float SubFactor11 = m[1][1] * m[3][3] - m[3][1] * m[1][3];
float SubFactor12 = m[1][0] * m[3][1] - m[3][0] * m[1][1];
float SubFactor13 = m[1][2] * m[2][3] - m[2][2] * m[1][3];
float SubFactor14 = m[1][1] * m[2][3] - m[2][1] * m[1][3];
float SubFactor15 = m[1][1] * m[2][2] - m[2][1] * m[1][2];
float SubFactor16 = m[1][0] * m[2][3] - m[2][0] * m[1][3];
float SubFactor17 = m[1][0] * m[2][2] - m[2][0] * m[1][2];
float SubFactor18 = m[1][0] * m[2][1] - m[2][0] * m[1][1];
vec4 adj_0;
adj_0[0] = + (m[1][1] * SubFactor00 - m[1][2] * SubFactor01 + m[1][3] * SubFactor02);
adj_0[1] = - (m[1][0] * SubFactor00 - m[1][2] * SubFactor03 + m[1][3] * SubFactor04);
adj_0[2] = + (m[1][0] * SubFactor01 - m[1][1] * SubFactor03 + m[1][3] * SubFactor05);
adj_0[3] = - (m[1][0] * SubFactor02 - m[1][1] * SubFactor04 + m[1][2] * SubFactor05);
return dot(m[0], adj_0);
}