Check for NaN

Seems some setups are sensitive to this and others are not.

Extensions/olcPGEX_RayCastWorld.h

@@ -3,7 +3,7 @@
 
 	+-------------------------------------------------------------+
 	|         OneLoneCoder Pixel Game Engine Extension            |
-	|                   Ray Cast World v1.0                       |
+	|                   Ray Cast World v1.01                      |
 	+-------------------------------------------------------------+
 
 	NOTE: UNDER ACTIVE DEVELOPMENT - THERE ARE BUGS/GLITCHES
@@ -310,10 +310,6 @@ void olc::rcw::Engine::Update(float fElapsedTime)
 			olc::vi2d vAreaTL = { std::min(vCurrentCell.x, vTargetCell.x) - 1, std::min(vCurrentCell.y, vTargetCell.y) - 1 };
 			olc::vi2d vAreaBR = { std::max(vCurrentCell.x, vTargetCell.x) + 1, std::max(vCurrentCell.y, vTargetCell.y) + 1 };
 
-			bool bRecheck = false;
-			do
-			{
-				bRecheck = false;
 
 			// Iterate through each cell in test area
 			olc::vi2d vCell;
@@ -338,11 +334,12 @@ void olc::rcw::Engine::Update(float fElapsedTime)
 						// But modified to work :P
 						olc::vf2d vRayToNearest = vNearestPoint - vPotentialPosition;
 						float fOverlap = object->fRadius - vRayToNearest.mag();
+						if(std::isnan(fOverlap)) fOverlap = 0;// Thanks Dandistine!
 
 						// If overlap is positive, then a collision has occurred, so we displace backwards by the 
 						// overlap amount. The potential position is then tested against other tiles in the area
 						// therefore "statically" resolving the collision
-							if (fOverlap > 0)
+						if ( fOverlap > 0) 
 						{
 							// Statically resolve the collision
 							vPotentialPosition = vPotentialPosition - vRayToNearest.norm() * fOverlap;
@@ -358,14 +355,10 @@ void olc::rcw::Engine::Update(float fElapsedTime)
 
 								HandleObjectVsScenery(object, vCell.x, vCell.y, side, vNearestPoint.x - float(vCell.x), vNearestPoint.y - float(vCell.y));
 							}
-
-								bRecheck = true;
-							}
 						}
 					}
 				}
 			}
-			while (bRecheck);
 		}
 
 		// Set the objects new position to the allowed potential position