/**
* graphene_matrix_get_row:
* @m: a #graphene_matrix_t
* @index_: the index of the row vector, between 0 and 3
* @res: (out caller-allocates): return location for the #graphene_vec4_t
* that is used to store the row vector
*
* Retrieves the given row vector at @index_ inside a matrix.
*
* Since: 1.0
*/
void
graphene_matrix_get_row (const graphene_matrix_t *m,
unsigned int index_,
graphene_vec4_t *res)
{
switch (index_)
{
case 0:
res->value = m->value.x;
break;
case 1:
res->value = m->value.y;
break;
case 2:
res->value = m->value.z;
break;
case 3:
res->value = m->value.w;
break;
default:
res->value = graphene_simd4f_init_zero ();
break;
}
}
static void
init_static_vec2_once (void)
{
static_vec2[VEC2_ZERO].value = graphene_simd4f_init_zero ();
static_vec2[VEC2_ONE].value = graphene_simd4f_init (1.f, 1.f, 0.f, 0.f);
static_vec2[VEC2_X_AXIS].value = graphene_simd4f_init (1.f, 0.f, 0.f, 0.f);
static_vec2[VEC2_Y_AXIS].value = graphene_simd4f_init (0.f, 1.f, 0.f, 0.f);
}
/**
* graphene_vec3_normalize:
* @v: a #graphene_vec3_t
* @res: (out caller-allocates): return location for the normalized vector
*
* Normalizes the given #graphene_vec3_t.
*
* Since: 1.0
*/
void
graphene_vec3_normalize (const graphene_vec3_t *v,
graphene_vec3_t *res)
{
if (graphene_vec3_length (v) != 0.f)
res->value = graphene_simd4f_normalize3 (v->value);
else
res->value = graphene_simd4f_init_zero ();
}
static void
init_static_vec4_once (void)
{
static_vec4[VEC4_ZERO].value = graphene_simd4f_init_zero ();
static_vec4[VEC4_ONE].value = graphene_simd4f_splat (1.f);
static_vec4[VEC4_X_AXIS].value = graphene_simd4f_init (1.f, 0.f, 0.f, 0.f);
static_vec4[VEC4_Y_AXIS].value = graphene_simd4f_init (0.f, 1.f, 0.f, 0.f);
static_vec4[VEC4_Z_AXIS].value = graphene_simd4f_init (0.f, 0.f, 1.f, 0.f);
static_vec4[VEC4_W_AXIS].value = graphene_simd4f_init (0.f, 0.f, 0.f, 1.f);
}
/**
* graphene_simd4f_init_zero:
*
* Initializes a #graphene_simd4f_t with 0 in all components.
*
* Returns: the initialized #graphene_simd4f_t
*
* Since: 1.0
*/
graphene_simd4f_t
(graphene_simd4f_init_zero) (void)
{
return graphene_simd4f_init_zero ();
}
