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#include <cogl/cogl.h>
#include <math.h>
#include <string.h>
#include "test-utils.h"
/* Macros are used here instead of functions so that the
* g_assert_cmpfloat will give a more interesting message when it
* fails */
#define COMPARE_FLOATS(a, b) \
do { \
if (fabsf ((a) - (b)) >= 0.0001f) \
g_assert_cmpfloat ((a), ==, (b)); \
} while (0)
#define COMPARE_MATRICES(a, b) \
do { \
COMPARE_FLOATS ((a)->xx, (b)->xx); \
COMPARE_FLOATS ((a)->yx, (b)->yx); \
COMPARE_FLOATS ((a)->zx, (b)->zx); \
COMPARE_FLOATS ((a)->wx, (b)->wx); \
COMPARE_FLOATS ((a)->xy, (b)->xy); \
COMPARE_FLOATS ((a)->yy, (b)->yy); \
COMPARE_FLOATS ((a)->zy, (b)->zy); \
COMPARE_FLOATS ((a)->wy, (b)->wy); \
COMPARE_FLOATS ((a)->xz, (b)->xz); \
COMPARE_FLOATS ((a)->yz, (b)->yz); \
COMPARE_FLOATS ((a)->zz, (b)->zz); \
COMPARE_FLOATS ((a)->wz, (b)->wz); \
COMPARE_FLOATS ((a)->xw, (b)->xw); \
COMPARE_FLOATS ((a)->yw, (b)->yw); \
COMPARE_FLOATS ((a)->zw, (b)->zw); \
COMPARE_FLOATS ((a)->ww, (b)->ww); \
} while (0)
void
test_euler_quaternion (void)
{
CoglEuler euler;
CoglQuaternion quaternion;
CoglMatrix matrix_a, matrix_b;
/* Try doing the rotation with three separate rotations */
cogl_matrix_init_identity (&matrix_a);
cogl_matrix_rotate (&matrix_a, -30.0f, 0.0f, 1.0f, 0.0f);
cogl_matrix_rotate (&matrix_a, 40.0f, 1.0f, 0.0f, 0.0f);
cogl_matrix_rotate (&matrix_a, 50.0f, 0.0f, 0.0f, 1.0f);
/* And try the same rotation with a euler */
cogl_euler_init (&euler, -30, 40, 50);
cogl_matrix_init_from_euler (&matrix_b, &euler);
/* Verify that the matrices are approximately the same */
COMPARE_MATRICES (&matrix_a, &matrix_b);
/* Try converting the euler to a matrix via a quaternion */
cogl_quaternion_init_from_euler (&quaternion, &euler);
memset (&matrix_b, 0, sizeof (matrix_b));
cogl_matrix_init_from_quaternion (&matrix_b, &quaternion);
COMPARE_MATRICES (&matrix_a, &matrix_b);
/* Try applying the rotation from a euler to a framebuffer */
cogl_framebuffer_identity_matrix (test_fb);
cogl_framebuffer_rotate_euler (test_fb, &euler);
memset (&matrix_b, 0, sizeof (matrix_b));
cogl_framebuffer_get_modelview_matrix (test_fb, &matrix_b);
COMPARE_MATRICES (&matrix_a, &matrix_b);
/* And again with a quaternion */
cogl_framebuffer_identity_matrix (test_fb);
cogl_framebuffer_rotate_quaternion (test_fb, &quaternion);
memset (&matrix_b, 0, sizeof (matrix_b));
cogl_framebuffer_get_modelview_matrix (test_fb, &matrix_b);
COMPARE_MATRICES (&matrix_a, &matrix_b);
/* FIXME: This needs a lot more tests! */
if (cogl_test_verbose ())
g_print ("OK\n");
}
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