fix: fix abnormal mesh bounds error

close #213
mob-sakai · Jan 24, 2024 · 772bf50 · 772bf50
1 parent 93d3919
commit 772bf50
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diff --git a/Packages/src/Runtime/UIParticleRenderer.cs b/Packages/src/Runtime/UIParticleRenderer.cs
@@ -339,6 +339,7 @@ public void UpdateMesh(Camera bakeCamera)
             }
             else if (_renderer.CanBakeMesh())
             {
+                _particleSystem.ValidateShape();
 #if PS_BAKE_API_V2
                 _renderer.BakeMesh(s_CombineInstances[0].mesh, bakeCamera,
                     ParticleSystemBakeMeshOptions.BakeRotationAndScale);

diff --git a/Packages/src/Runtime/Utils.cs b/Packages/src/Runtime/Utils.cs
@@ -109,6 +109,29 @@ public static ParticleSystem.Particle[] GetParticleArray(int size)
             return s_TmpParticles;
         }
 
+        public static void ValidateShape(this ParticleSystem self)
+        {
+            var shape = self.shape;
+            if (shape.enabled && shape.alignToDirection)
+            {
+                if (Mathf.Approximately(shape.scale.x * shape.scale.y * shape.scale.z, 0))
+                {
+                    if (Mathf.Approximately(shape.scale.x, 0))
+                    {
+                        shape.scale.Set(0.0001f, shape.scale.y, shape.scale.z);
+                    }
+                    else if (Mathf.Approximately(shape.scale.y, 0))
+                    {
+                        shape.scale.Set(shape.scale.x, 0.0001f, shape.scale.z);
+                    }
+                    else if (Mathf.Approximately(shape.scale.z, 0))
+                    {
+                        shape.scale.Set(shape.scale.x, shape.scale.y, 0.0001f);
+                    }
+                }
+            }
+        }
+
         public static bool CanBakeMesh(this ParticleSystemRenderer self)
         {
             // #69: Editor crashes when mesh is set to null when `ParticleSystem.RenderMode = Mesh`