[unity] Add vertex effect callback.

spine-unity/Assets/spine-unity/Mesh Generation/SpineMesh.cs

@@ -73,6 +73,8 @@ namespace Spine.Unity {
 		public int SlotCount { get { return endSlot - startSlot; } }
 	}
 
+	public delegate void MeshGeneratorDelegate (MeshGenerator meshGenerator);
+
 	[System.Serializable]
 	public class MeshGenerator {
 		public Settings settings = Settings.Default;
@@ -115,6 +117,10 @@ namespace Spine.Unity {
 		[NonSerialized] readonly ExposedList<Color32> colorBuffer = new ExposedList<Color32>(4);
 		[NonSerialized] readonly ExposedList<ExposedList<int>> submeshes = new ExposedList<ExposedList<int>> { new ExposedList<int>(6) }; // start with 1 submesh.
 
+		public Vector3[] VertexBuffer { get { return this.vertexBuffer.Items; } }
+		public Vector2[] UVBuffer { get { return this.uvBuffer.Items; } }
+		public Color32[] ColorBuffer { get { return this.colorBuffer.Items; } }
+
 		[NonSerialized] Vector2 meshBoundsMin, meshBoundsMax;
 		[NonSerialized] float meshBoundsThickness;
 		[NonSerialized] int submeshIndex = 0;

spine-unity/Assets/spine-unity/Modules/SkeletonGraphic/SkeletonGraphic.cs

@@ -199,6 +199,9 @@ namespace Spine.Unity {
 		public event UpdateBonesDelegate UpdateWorld;
 		public event UpdateBonesDelegate UpdateComplete;
 
+		/// <summary> Occurs after the vertex data populated every frame, before the vertices are pushed into the mesh.</summary>
+		public event Spine.Unity.MeshGeneratorDelegate OnPostProcessVertices;
+
 		public void Clear () {
 			skeleton = null;
 			canvasRenderer.Clear();
@@ -269,11 +272,12 @@ namespace Spine.Unity {
 			}
 
 			if (canvas != null) meshGenerator.ScaleVertexData(canvas.referencePixelsPerUnit);
+			if (OnPostProcessVertices != null) OnPostProcessVertices.Invoke(this.meshGenerator);
 
 			var mesh = smartMesh.mesh;
 			meshGenerator.FillVertexData(mesh);
 			if (updateTriangles) meshGenerator.FillTrianglesSingle(mesh);
-			
+
 			canvasRenderer.SetMesh(mesh);
 			smartMesh.instructionUsed.Set(currentInstructions);
 

spine-unity/Assets/spine-unity/SkeletonRenderer.cs

@@ -41,7 +41,10 @@ namespace Spine.Unity {
 	public class SkeletonRenderer : MonoBehaviour, ISkeletonComponent {
 
 		public delegate void SkeletonRendererDelegate (SkeletonRenderer skeletonRenderer);
-		public SkeletonRendererDelegate OnRebuild;
+		public event SkeletonRendererDelegate OnRebuild;
+
+		/// <summary> Occurs after the vertex data is populated every frame, before the vertices are pushed into the mesh.</summary>
+		public event Spine.Unity.MeshGeneratorDelegate OnPostProcessVertices;
 
 		public SkeletonDataAsset skeletonDataAsset;
 		public SkeletonDataAsset SkeletonDataAsset { get { return skeletonDataAsset; } } // ISkeletonComponent
@@ -280,6 +283,8 @@ namespace Spine.Unity {
 					meshGenerator.BuildMeshWithArrays(currentInstructions, updateTriangles);
 			}
 
+			if (OnPostProcessVertices != null) OnPostProcessVertices.Invoke(this.meshGenerator);
+
 			// STEP 3. Move the mesh data into a UnityEngine.Mesh ===========================================================================
 			var currentMesh = currentSmartMesh.mesh;
 			meshGenerator.FillVertexData(currentMesh);