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41a03f0589
Same story, but smaller damage area. CoglQuaternion was used in fewer places than CoglEuler, resulting in a smaller patch. https://gitlab.gnome.org/GNOME/mutter/merge_requests/458
83 lines
3.0 KiB
C
83 lines
3.0 KiB
C
#include <cogl/cogl.h>
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#include <math.h>
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#include <string.h>
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#include "test-declarations.h"
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#include "test-utils.h"
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/* Macros are used here instead of functions so that the
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* g_assert_cmpfloat will give a more interesting message when it
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* fails */
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#define COMPARE_FLOATS(a, b) \
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do { \
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if (fabsf ((a) - (b)) >= 0.0001f) \
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g_assert_cmpfloat ((a), ==, (b)); \
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} while (0)
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#define COMPARE_MATRICES(a, b) \
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do { \
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COMPARE_FLOATS ((a)->xx, (b)->xx); \
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COMPARE_FLOATS ((a)->yx, (b)->yx); \
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COMPARE_FLOATS ((a)->zx, (b)->zx); \
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COMPARE_FLOATS ((a)->wx, (b)->wx); \
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COMPARE_FLOATS ((a)->xy, (b)->xy); \
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COMPARE_FLOATS ((a)->yy, (b)->yy); \
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COMPARE_FLOATS ((a)->zy, (b)->zy); \
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COMPARE_FLOATS ((a)->wy, (b)->wy); \
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COMPARE_FLOATS ((a)->xz, (b)->xz); \
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COMPARE_FLOATS ((a)->yz, (b)->yz); \
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COMPARE_FLOATS ((a)->zz, (b)->zz); \
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COMPARE_FLOATS ((a)->wz, (b)->wz); \
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COMPARE_FLOATS ((a)->xw, (b)->xw); \
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COMPARE_FLOATS ((a)->yw, (b)->yw); \
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COMPARE_FLOATS ((a)->zw, (b)->zw); \
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COMPARE_FLOATS ((a)->ww, (b)->ww); \
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} while (0)
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void
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test_euler_quaternion (void)
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{
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graphene_euler_t euler;
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graphene_quaternion_t quaternion;
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CoglMatrix matrix_a, matrix_b;
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/* Try doing the rotation with three separate rotations */
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cogl_matrix_init_identity (&matrix_a);
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cogl_matrix_rotate (&matrix_a, -30.0f, 0.0f, 1.0f, 0.0f);
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cogl_matrix_rotate (&matrix_a, 40.0f, 1.0f, 0.0f, 0.0f);
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cogl_matrix_rotate (&matrix_a, 50.0f, 0.0f, 0.0f, 1.0f);
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/* And try the same rotation with a euler */
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graphene_euler_init_with_order (&euler, 40, -30, 50, GRAPHENE_EULER_ORDER_YXZ);
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cogl_matrix_init_from_euler (&matrix_b, &euler);
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/* Verify that the matrices are approximately the same */
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COMPARE_MATRICES (&matrix_a, &matrix_b);
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/* Try converting the euler to a matrix via a quaternion */
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graphene_quaternion_init_from_euler (&quaternion, &euler);
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memset (&matrix_b, 0, sizeof (matrix_b));
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cogl_matrix_init_from_quaternion (&matrix_b, &quaternion);
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COMPARE_MATRICES (&matrix_a, &matrix_b);
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/* Try applying the rotation from a euler to a framebuffer */
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cogl_framebuffer_identity_matrix (test_fb);
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cogl_framebuffer_rotate_euler (test_fb, &euler);
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memset (&matrix_b, 0, sizeof (matrix_b));
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cogl_framebuffer_get_modelview_matrix (test_fb, &matrix_b);
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COMPARE_MATRICES (&matrix_a, &matrix_b);
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/* And again with a quaternion */
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cogl_framebuffer_identity_matrix (test_fb);
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cogl_framebuffer_rotate_quaternion (test_fb, &quaternion);
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memset (&matrix_b, 0, sizeof (matrix_b));
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cogl_framebuffer_get_modelview_matrix (test_fb, &matrix_b);
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COMPARE_MATRICES (&matrix_a, &matrix_b);
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/* FIXME: This needs a lot more tests! */
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if (cogl_test_verbose ())
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g_print ("OK\n");
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}
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