Collision check and particlePosition -> random

- A new class is added for simple collision check
- position particles in utility is upgraded
- morton sorting is not active yet for particlesPhasicFlow

utilities/particlesPhasicFlow/empty/empty.cpp

@@ -30,7 +30,7 @@ pFlow::empty::empty(
 	positionParticles(control, dict),
 	position_
 	(
-		"empty",maxNumberOfParticles_, 0, RESERVE()
+		"empty",maxNumberOfParticles(), 0, RESERVE()
 	)
 {
 }