static void step(void *void_data, double time) {
(void) time;
struct cube_data *data = (struct cube_data*) void_data;
data->q = quat_mult(data->rot, data->q);
quat_to_matrix(data->q, data->m);
}
/**
* Get a translation matrix for this object.
**/
void
object_get_transform_mat(object_t *object, float matrix[16])
{
MATRIX_DECL(translate,
object->scale[0], 0, 0, object->trans[0],
0, object->scale[1], 0, object->trans[1],
0, 0, object->scale[2], object->trans[2],
0, 0, 0, 1);
float rotate[16];
float translate_final[16];
quat_to_matrix(&object->rot, rotate);
matrix_multiply(translate, rotate, translate_final);
matrix_multiply(translate_final, object->pretransform, matrix);
}
