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mypaint-matrix.h
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#ifndef MYPAINTMATRIX_H
#define MYPAINTMATRIX_H
/* libmypaint - The MyPaint Brush Library
* Copyright (C) 2019 The MyPaint Team
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
typedef struct {
float rows[3][3];
} MyPaintTransform;
MyPaintTransform mypaint_transform_unit();
MyPaintTransform mypaint_transform_rotate_cw(const MyPaintTransform transform, const float angle_radians);
MyPaintTransform mypaint_transform_rotate_ccw(const MyPaintTransform transform, const float angle_radians);
MyPaintTransform mypaint_transform_reflect(const MyPaintTransform transform, const float angle_radians);
MyPaintTransform mypaint_transform_translate(const MyPaintTransform transform, const float x, const float y);
void mypaint_transform_point(const MyPaintTransform* const transform, float x, float y, float* x_out, float* y_out);
#endif
MyPaintTransform
3x3 matrix of floats, row-major order.
Definition mypaint-matrix.h:29
MyPaintTransform::rows
float rows[3][3]
Definition mypaint-matrix.h:30
MyPaintTransform::mypaint_transform_rotate_ccw
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
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
MyPaintTransform mypaint_transform_unit()
3x3 unit matrix
MyPaintTransform::mypaint_transform_reflect
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
MyPaintTransform mypaint_transform_rotate_cw(const MyPaintTransform transform, const float angle_radians)
Create a new transform by rotating the input transform clockwise.
MyPaintTransform::mypaint_transform_point
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.