Use MaxSpeed when calculating speedGain (#921)

This calculation was never implemented from the Mercury Particle Engine port
craftworkgames · Jul 12, 2024 · f56dc7b · f56dc7b
1 parent 3314226
commit f56dc7b
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/source/MonoGame.Extended/Particles/Modifiers/VortexModifier.cs b/source/MonoGame.Extended/Particles/Modifiers/VortexModifier.cs
@@ -1,3 +1,4 @@
+using System;
 using Microsoft.Xna.Framework;
 
 namespace MonoGame.Extended.Particles.Modifiers
@@ -20,11 +21,12 @@ public override void Update(float elapsedSeconds, ParticleBuffer.ParticleIterato
 
                 var distance2 = diff.LengthSquared();
 
-                var speedGain = _gravConst*Mass/distance2*elapsedSeconds;
+                var speedGain = _gravConst*Mass/distance2;
+                speedGain = Math.Max(Math.Min(speedGain, MaxSpeed), -MaxSpeed) * elapsedSeconds;
                 // normalize distances and multiply by speedGain
                 diff.Normalize();
                 particle->Velocity += diff*speedGain;
             }
         }
     }
-}
+}