You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
2.7 KiB
98 lines
2.7 KiB
/*
|
|
* Copyright © 2018 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.
|
|
*/
|
|
|
|
#ifndef __IGT_MATRIX_H__
|
|
#define __IGT_MATRIX_H__
|
|
|
|
/**
|
|
* igt_vec4:
|
|
* @d: vector elements
|
|
*
|
|
* A 4 element column vector (4x1 matrix).
|
|
*/
|
|
struct igt_vec4 {
|
|
float d[4];
|
|
};
|
|
|
|
/**
|
|
* igt_mat4:
|
|
* @d: matrix elements
|
|
*
|
|
* A 4x4 column major matrix.
|
|
*/
|
|
struct igt_mat4 {
|
|
float d[16];
|
|
};
|
|
|
|
#define m(row, col) ((col) * 4 + (row))
|
|
|
|
void igt_matrix_print(const struct igt_mat4 *m);
|
|
struct igt_mat4 igt_matrix_identity(void);
|
|
struct igt_mat4 igt_matrix_scale(float x, float y, float z);
|
|
struct igt_mat4 igt_matrix_translate(float x, float y, float z);
|
|
struct igt_mat4 igt_matrix_multiply(const struct igt_mat4 *a,
|
|
const struct igt_mat4 *b);
|
|
|
|
/**
|
|
* igt_matrix_transform:
|
|
* @m: The matrix
|
|
* @v: The vector
|
|
*
|
|
* Transform the vector @v by the matrix @m. @m is on the left,
|
|
* @v on the right.
|
|
*
|
|
* Returns:
|
|
* The transformed vector.
|
|
*/
|
|
static inline struct igt_vec4
|
|
igt_matrix_transform(const struct igt_mat4 *m,
|
|
const struct igt_vec4 *v)
|
|
{
|
|
struct igt_vec4 ret = {
|
|
.d = { m->d[m(0, 0)] * v->d[0] +
|
|
m->d[m(0, 1)] * v->d[1] +
|
|
m->d[m(0, 2)] * v->d[2] +
|
|
m->d[m(0, 3)] * v->d[3],
|
|
|
|
m->d[m(1, 0)] * v->d[0] +
|
|
m->d[m(1, 1)] * v->d[1] +
|
|
m->d[m(1, 2)] * v->d[2] +
|
|
m->d[m(1, 3)] * v->d[3],
|
|
|
|
m->d[m(2, 0)] * v->d[0] +
|
|
m->d[m(2, 1)] * v->d[1] +
|
|
m->d[m(2, 2)] * v->d[2] +
|
|
m->d[m(2, 3)] * v->d[3],
|
|
|
|
m->d[m(3, 0)] * v->d[0] +
|
|
m->d[m(3, 1)] * v->d[1] +
|
|
m->d[m(3, 2)] * v->d[2] +
|
|
m->d[m(3, 3)] * v->d[3],
|
|
},
|
|
};
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif /* __IGT_MATRIX_H__ */
|