static void quaternion_angle_vec3_to_from (mutest_spec_t *spec) { graphene_quaternion_t q1, q2; graphene_vec3_t axis; float angle; graphene_quaternion_init_from_angle_vec3 (&q1, 45.f, graphene_vec3_y_axis ()); graphene_quaternion_init_from_quaternion (&q2, &q1); graphene_quaternion_to_angle_vec3 (&q2, &angle, &axis); mutest_expect ("roundtrip init_from_angle_vec3 and to_angle_vec3 yields the same angle", mutest_float_value (angle), mutest_to_be_close_to, 45.0, 0.0001, NULL); mutest_expect ("roundtrip init_from_angle_vec3 and to_angle_vec3 yields the same axis", mutest_bool_value (graphene_vec3_near (&axis, graphene_vec3_y_axis (), 0.0001f)), mutest_to_be_true, NULL); }
static void gst_gl_transformation_build_mvp (GstGLTransformation * transformation) { graphene_point3d_t translation_vector = GRAPHENE_POINT3D_INIT (transformation->xtranslation * 2.0 * transformation->aspect, transformation->ytranslation * 2.0, transformation->ztranslation * 2.0); graphene_matrix_t model_matrix; graphene_matrix_t projection_matrix; graphene_matrix_t view_matrix; graphene_matrix_t vp_matrix; graphene_vec3_t eye; graphene_vec3_t center; graphene_vec3_t up; graphene_vec3_init (&eye, 0.f, 0.f, 1.f); graphene_vec3_init (¢er, 0.f, 0.f, 0.f); graphene_vec3_init (&up, 0.f, 1.f, 0.f); graphene_matrix_init_scale (&model_matrix, transformation->xscale, transformation->yscale, 1.0f); graphene_matrix_rotate (&model_matrix, transformation->xrotation, graphene_vec3_x_axis ()); graphene_matrix_rotate (&model_matrix, transformation->yrotation, graphene_vec3_y_axis ()); graphene_matrix_rotate (&model_matrix, transformation->zrotation, graphene_vec3_z_axis ()); graphene_matrix_translate (&model_matrix, &translation_vector); if (transformation->ortho) { graphene_matrix_init_ortho (&projection_matrix, -transformation->aspect, transformation->aspect, -1, 1, transformation->znear, transformation->zfar); } else { graphene_matrix_init_perspective (&projection_matrix, transformation->fov, transformation->aspect, transformation->znear, transformation->zfar); } graphene_matrix_init_look_at (&view_matrix, &eye, ¢er, &up); graphene_matrix_multiply (&view_matrix, &projection_matrix, &vp_matrix); graphene_matrix_multiply (&model_matrix, &vp_matrix, &transformation->mvp_matrix); }