leafs frame system

src/VFX.cs

@@ -74,6 +74,30 @@ static class VFX
                 // }
             }
         }
+
+        for (int i = 0; i < leafs.count; i++)
+        {
+            Particle particle = leafs.particles[i];
+            particle.state.Step(particle.pos.y > 0);
+            if (particle.state.state)
+            {
+                particle.pos += particle.vel * Time.Stepf;
+                float x_wind = Maths.smooth_stop(Maths.u_scalar(SKMath.Sin((particle.pos.x * 0.5f) - Time.Totalf)));
+                particle.vel.x += x_wind * Time.Stepf;
+                particle.vel += Vec3.Up * -9.81f * 0.1f * Time.Stepf;
+                particle.ori = Quat.LookDir(particle.vel) * Quat.FromAngles(0, 0, 90);
+            }
+            else
+            {
+                particle.pos.y = 0;
+                particle.vel = Vec3.Zero;
+
+                if (particle.state.delta == -1)
+                {
+                    Ripple(particle.pos);
+                }
+            }
+        }
     }
 }