Function pipe

src/shapes.cpp:36–41

	return dist<=sq(r) && sqnt<=sq(0.5f*l);
}
bool pipe(const uint x, const uint y, const uint z, const float3& p, const float3& n, const float r) {
	const float3 t = float3(x, y, z)-p;
	const float sqnt = sq(dot(normalize(n), t));
	const float dist = sq(t.x)+sq(t.y)+sq(t.z)-sqnt;
	return dist>=sq(r-d)&&dist<=sq(r+d) && sqnt<=sq(0.5f*length(n));
}
bool conepipe(const uint x, const uint y, const uint z, const float3& p, const float3& n, const float r1, const float r2) {
	const float3 t = float3(x, y, z)-p;
	const float nt = dot(normalize(n), t);