I’m making a particle simulation.
I’m moving the particles to the mouse position when left mouse button is pressed.
After the particles reach the destination they disappear (that should not happen).
Code: https://pastebin.com/hMKvkRSP
What am i doing wrong?
When distance is = Vector2.Zero, then Normaize fails with NaN.
A nicer solution is to first get direction.Length() , check if it’s zero, and then normalize ‘direction’ manually by dividing direction/length. (it’s faster too since you skip an extra Sqrt.)
Ok, why doesn’t Normalize return zero then? It’s complicated! A zero result would still be wrong, It’s not a valid normal. It seems to fit in this situation but in many general cases it doesn’t work.
Vector3.Length is already doing a Sqrt … use LengthSquared to check for zero (it’s only the multiplications without the sqrt)
[but you’re right, Normalize would just do another sqrt by getting the length, so if you can spare it, it’s even better)
thanks that worked perfectly 