getBarycoords
Computes the barycentric coordinates of the given point @p.
The point @p must lie on the same plane as the triangle @t; if the point is not coplanar, the result of this function is undefined.
If we place the origin in the coordinates of the triangle's A point, the barycentric coordinates are u
, which is on the AC vector; and v
which is on the AB vector:
The returned #graphene_vec2_t contains the following values, in order:
res.x = u
res.y = v
Return
true
if the barycentric coordinates are valid
Since
1.2
Parameters
p
a #graphene_point3d_t
res
return location for the vector with the barycentric coordinates