Rewrote the particles to allow for more advanced particles.

+ Particles can now be detached from the object.
+ Each particle now has an own Lifetime, that can be controlled.
+ Particles can now appear in a continuous way.

SMCode/SM.Base/Drawing/Particles/ParticleMovement.cs

@@ -14,17 +14,17 @@ namespace SM.Base.Drawing.Particles
         /// <summary>
         ///     Default movement for 2D.
         /// </summary>
-        public static Vector2 Default2D(Vector2 direction, ParticleContext context)
+        public static Vector2 Default2D(ParticleInstance<Vector2> particle)
         {
-            return direction * (context.Timer.Elapsed * context.Speed);
+            return particle.Direction * ((particle.StartLifetime - particle.Lifetime) * particle.Speed);
         }
 
         /// <summary>
         ///     Default movement for 3D.
         /// </summary>
-        public static Vector3 Default3D(Vector3 direction, ParticleContext context)
+        public static Vector3 Default3D(ParticleInstance<Vector3> particle)
         {
-            return direction * (context.Timer.Elapsed * context.Speed);
+            return particle.Direction * ((particle.StartLifetime - particle.Lifetime) * particle.Speed);
         }
     }
 }