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June 14, 2016 23:44
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| using UnityEngine; | |
| using UnityEngine.Assertions; | |
| using System.Linq; | |
| using System.Collections.Generic; | |
| using System.Collections.ObjectModel; | |
| namespace SmartCombine { | |
| public class SmartMeshData { | |
| public Mesh mesh {get; private set;} | |
| public Matrix4x4 transform {get; private set;} | |
| Material[] _materials; | |
| public IList<Material> materials {get {return new ReadOnlyCollection<Material>(_materials);}} | |
| public SmartMeshData(Mesh inMesh, Material[] inMaterials, Matrix4x4 inTransform) { | |
| Assert.IsTrue(inMesh, "Mesh cannot be null"); | |
| Assert.IsNotNull<Material[]>(inMaterials, "Materials array cannot be null"); | |
| mesh = inMesh; | |
| _materials = inMaterials; | |
| transform = inTransform; | |
| if (_materials.Length != mesh.subMeshCount) { | |
| Debug.LogWarning("SmartMeshData has incorrect number of materials. Resizing to match submesh count"); | |
| Material[] resizedMaterials = new Material[mesh.subMeshCount]; | |
| for (int i = 0; i < _materials.Length; i++) { | |
| if (i < _materials.Length) { | |
| resizedMaterials[i] = _materials[i]; | |
| } else { | |
| resizedMaterials[i] = null; | |
| } | |
| } | |
| _materials = resizedMaterials; | |
| } | |
| } | |
| public SmartMeshData(Mesh inputMesh, Material[] inputMaterials) | |
| : this(inputMesh, inputMaterials, Matrix4x4.identity) { | |
| } | |
| public SmartMeshData(Mesh inputMesh, Material[] inputMaterials, Vector3 position) | |
| : this(inputMesh, inputMaterials, Matrix4x4.TRS(position, Quaternion.identity, Vector3.one)) { | |
| } | |
| public SmartMeshData(Mesh inputMesh, Material[] inputMaterials, Vector3 position, Quaternion rotation) | |
| : this(inputMesh, inputMaterials, Matrix4x4.TRS(position, rotation, Vector3.one)) { | |
| } | |
| public SmartMeshData(Mesh inputMesh, Material[] inputMaterials, Vector3 position, Quaternion rotation, Vector3 scale) | |
| : this(inputMesh, inputMaterials, Matrix4x4.TRS(position, rotation, scale)) { | |
| } | |
| } | |
| public static class SmartCombineUtilities { | |
| private class SmartSubmeshData { | |
| public Mesh mesh {get; private set;} | |
| public IList<CombineInstance> combineInstances {get; private set;} | |
| public SmartSubmeshData() { | |
| combineInstances = new List<CombineInstance>(); | |
| } | |
| public void CombineSubmeshes() { | |
| if (mesh == null) mesh = new Mesh(); | |
| else mesh.Clear(); | |
| mesh.CombineMeshes(combineInstances.ToArray(), true, true); | |
| } | |
| } | |
| public static void CombineMeshesSmart(this Mesh mesh, SmartMeshData[] meshData, out Material[] materials) { | |
| IDictionary<Material, SmartSubmeshData> materialTable = new Dictionary<Material, SmartSubmeshData>(); | |
| IList<CombineInstance> submeshCombineInstances = new List<CombineInstance>(); | |
| foreach (SmartMeshData data in meshData) { | |
| IList<Material> meshMaterials = data.materials; | |
| for (int subMeshIndex = 0; subMeshIndex < data.mesh.subMeshCount; subMeshIndex++) { | |
| SmartSubmeshData submeshData = null; | |
| if (materialTable.ContainsKey(meshMaterials[subMeshIndex])) { | |
| submeshData = materialTable[meshMaterials[subMeshIndex]]; | |
| } else { | |
| submeshData = new SmartSubmeshData(); | |
| materialTable.Add(meshMaterials[subMeshIndex], submeshData); | |
| } | |
| CombineInstance combineInstance = new CombineInstance(); | |
| combineInstance.mesh = data.mesh; | |
| combineInstance.subMeshIndex = subMeshIndex; | |
| combineInstance.transform = data.transform; | |
| submeshData.combineInstances.Add(combineInstance); | |
| } | |
| } | |
| foreach (SmartSubmeshData subMeshData in materialTable.Values) { | |
| subMeshData.CombineSubmeshes(); | |
| CombineInstance combineInstance = new CombineInstance(); | |
| combineInstance.mesh = subMeshData.mesh; | |
| combineInstance.subMeshIndex = 0; | |
| submeshCombineInstances.Add(combineInstance); | |
| } | |
| mesh.Clear(); | |
| mesh.CombineMeshes(submeshCombineInstances.ToArray(), false, false); | |
| mesh.Optimize(); | |
| materials = materialTable.Keys.ToArray(); | |
| } | |
| } | |
| } |
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