/**
* graphene_matrix_init_look_at:
* @m: a #graphene_matrix_t
* @eye: the vector describing the position to look from
* @center: the vector describing the position to look at
* @up: the vector describing the world's upward direction; usually,
* this is the graphene_vec3_y_axis() vector
*
* Initializes a #graphene_matrix_t so that it positions the "camera"
* at the given @eye coordinates towards an object at the @center
* coordinates. The top of the camera is aligned to the direction
* of the @up vector.
*
* Returns: (transfer none): the initialized matrix
*
* Since: 1.0
*/
graphene_matrix_t *
graphene_matrix_init_look_at (graphene_matrix_t *m,
const graphene_vec3_t *eye,
const graphene_vec3_t *center,
const graphene_vec3_t *up)
{
graphene_simd4x4f_init_look_at (&m->value, eye->value, center->value, up->value);
return m;
}
graphene_matrix_t *
graphene_matrix_init_look_at (graphene_matrix_t *m,
const graphene_vec3_t *eye,
const graphene_vec3_t *center,
const graphene_vec3_t *up)
{
g_return_val_if_fail (m != NULL, NULL);
graphene_simd4x4f_init_look_at (&m->value, eye->value, center->value, up->value);
return m;
}
