libmypaint 1.6.1
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/builddir/build/BUILD/libmypaint-1.6.1/mypaint-matrix.h
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1#ifndef MYPAINTMATRIX_H
2#define MYPAINTMATRIX_H
3
4/* libmypaint - The MyPaint Brush Library
5 * Copyright (C) 2019 The MyPaint Team
6 *
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
29typedef struct {
30 float rows[3][3];
32
45
55MyPaintTransform mypaint_transform_rotate_cw(const MyPaintTransform transform, const float angle_radians);
56
66MyPaintTransform mypaint_transform_rotate_ccw(const MyPaintTransform transform, const float angle_radians);
67
77MyPaintTransform mypaint_transform_reflect(const MyPaintTransform transform, const float angle_radians);
78
88MyPaintTransform mypaint_transform_translate(const MyPaintTransform transform, const float x, const float y);
89
101void mypaint_transform_point(const MyPaintTransform* const transform, float x, float y, float* x_out, float* y_out);
102
103#endif
3x3 matrix of floats, row-major order.
Definition mypaint-matrix.h:29
MyPaintTransform mypaint_transform_rotate_ccw(const MyPaintTransform transform, const float angle_radians)
Create a new transform by rotating the input transform counterclockwise.
MyPaintTransform mypaint_transform_translate(const MyPaintTransform transform, const float x, const float y)
Create a new transform by reflecting the input transform across a line crossing 0,...
MyPaintTransform mypaint_transform_unit()
3x3 unit matrix
MyPaintTransform mypaint_transform_reflect(const MyPaintTransform transform, const float angle_radians)
Create a new transform by reflecting the input transform across a line crossing 0,...
MyPaintTransform mypaint_transform_rotate_cw(const MyPaintTransform transform, const float angle_radians)
Create a new transform by rotating the input transform clockwise.
void mypaint_transform_point(const MyPaintTransform *const transform, float x, float y, float *x_out, float *y_out)
Apply transformation to a (x, y) point, writing the resulting coordinates to out parameters.