vec3 Point::computeNormal(const vec3& point) const
{
vec3 normal(point - getTransformedPosition());
normalizeOrRandomize(normal);
return normal;
}
Vector3D Line::computeNormal(const Vector3D& point) const
{
float d = -dotProduct(tDist,point);
float sqrNorm = tDist.getSqrNorm();
float t = 0.0f;
if (sqrNorm > 0.0f)
{
t = -(dotProduct(tDist,tBounds[0]) + d) / sqrNorm;
// t is clamped to the segment
if (t < 0.0f) t = 0.0f;
else if (t > 1.0f) t = 1.0f;
}
Vector3D normal = point;
normal -= tBounds[0] + t * tDist;
normalizeOrRandomize(normal);
return normal;
}
Vector3D Sphere::computeNormal(const Vector3D& point) const
{
Vector3D normal(point - getTransformedPosition());
normalizeOrRandomize(normal);
return normal;
}
