Small improvements in sphere and cylinder raycasting

src/collision/shapes/CylinderShape.cpp

@@ -175,10 +175,8 @@ bool CylinderShape::raycast(const Ray& ray, ProxyShape* proxyShape) const {
                                     (mDotN - nDotD) + t) <= decimal(0.0));
     }
 
-    t = t0;
-
     // If the intersection is behind the origin of the ray, we return no hit
-    return (t >= decimal(0.0));
+    return (t0 >= decimal(0.0));
 }
 
 // Raycast method with feedback information

src/collision/shapes/SphereShape.cpp

@@ -69,10 +69,7 @@ bool SphereShape::raycast(const Ray& ray, ProxyShape* proxyShape) const {
     decimal discriminant = b*b - c;
 
     // If the discriminant is negative, there is no intersection
-    if (discriminant < decimal(0.0)) return false;
-
-    // There is an intersection
-    return true;
+    return (discriminant >= decimal(0.0));
 }
 
 // Raycast method with feedback information