bool ClampLineInMap(float3& start, float3& end)
{
const float3 dir = end - start;
const std::pair<float, float>& interp = GetMapBoundaryIntersectionPoints(start, dir);
const float& near = interp.first;
const float& far = interp.second;
if (far < 0.0f) {
//! outside of map!
start = -OnesVector;
end = -OnesVector;
return true;
}
if (far < 1.0f || near > 0.0f) {
end = start + dir * std::min(far, 1.0f);
start = start + dir * std::max(near, 0.0f);
//! precision of near,far are limited, so better clamp it afterwards
end.ClampInMap();
start.ClampInMap();
return true;
}
return false;
}
