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//using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
#if !UNITY_FLASH// no static batching in flash
namespace UnityEngine
{
internal class InternalStaticBatchingUtility {
// assume 16bit indices
const int MaxVerticesInBatch = 64000; // a little bit less than 64K - just in case
const string CombinedMeshPrefix = "Combined Mesh";
static public void Combine (UnityEngine.GameObject staticBatchRoot)
{
Combine(staticBatchRoot, false);
}
static public void Combine (UnityEngine.GameObject staticBatchRoot, bool combineOnlyStatic)
{
GameObject[] gos = (GameObject[])UnityEngine.Object.FindObjectsOfType(typeof(GameObject));
List<GameObject> filteredGos = new List<GameObject>();
foreach (GameObject go in gos)
{
if (staticBatchRoot != null)
if (!go.transform.IsChildOf(staticBatchRoot.transform))
continue;
if (combineOnlyStatic && !go.isStaticBatchable )
continue;
filteredGos.Add(go);
}
gos = filteredGos.ToArray();
// Inform user about Advanced license only feature
// real license guard is baked into the native code.
bool hasProOrAdvancedLicense = Application.HasProLicense() || Application.HasAdvancedLicense();
if (!hasProOrAdvancedLicense)
{
// Display error only if invoked from the user script
if (staticBatchRoot != null && gos.Length > 0)
Debug.LogError("Your Unity license is not sufficient for Static Batching.");
}
Combine(gos, staticBatchRoot);
}
static public void Combine(GameObject[] gos, UnityEngine.GameObject staticBatchRoot)
{
Matrix4x4 staticBatchInverseMatrix = Matrix4x4.identity;
Transform staticBatchRootTransform = null;
if (staticBatchRoot)
{
staticBatchInverseMatrix = staticBatchRoot.transform.worldToLocalMatrix;
staticBatchRootTransform = staticBatchRoot.transform;
}
int batchIndex = 0;
int verticesInBatch = 0;
List<MeshSubsetCombineUtility.MeshInstance> meshes = new List<MeshSubsetCombineUtility.MeshInstance>();
List<MeshSubsetCombineUtility.SubMeshInstance> subsets = new List<MeshSubsetCombineUtility.SubMeshInstance>();
List<GameObject> subsetGOs = new List<GameObject> ();
Array.Sort(gos, new SortGO());
foreach (GameObject go in gos)
{
MeshFilter filter = go.GetComponent(typeof(MeshFilter)) as MeshFilter;
if (filter == null)
continue;
// reject if has no mesh
if (filter.sharedMesh == null)
continue;
// reject if mesh not readable
if (!filter.sharedMesh.canAccess)
continue;
// reject if has not renderer or renderer is disabled
if (filter.renderer == null || !filter.renderer.enabled)
continue;
// reject if already combined for static batching
if (filter.renderer.staticBatchIndex != 0)
continue;
// check if we have enough space inside the current batch
if (verticesInBatch + filter.sharedMesh.vertexCount > MaxVerticesInBatch)
{
MakeBatch (meshes, subsets, subsetGOs, staticBatchRootTransform, batchIndex++);
meshes.Clear();
subsets.Clear();
subsetGOs.Clear();
verticesInBatch = 0;
}
MeshSubsetCombineUtility.MeshInstance instance = new MeshSubsetCombineUtility.MeshInstance ();
Mesh instanceMesh = filter.sharedMesh;
instance.meshInstanceID = instanceMesh.GetInstanceID();
instance.transform = staticBatchInverseMatrix * filter.transform.localToWorldMatrix;
instance.lightmapTilingOffset = filter.renderer.lightmapTilingOffset;
//;;Debug.Log("New static mesh (" + go.name + ")verts: " + instance.mesh.vertexCount +
// ", tris: " + instance.mesh.triangles.Length +
// ", materials: " + filter.renderer.sharedMaterials.Length +
// ", subs: " + instance.mesh.subMeshCount
// );
meshes.Add(instance);
Material[] materials = filter.renderer.sharedMaterials;
if (materials.Length > instanceMesh.subMeshCount)
{
Debug.LogWarning("Mesh has more materials (" + materials.Length + ") than subsets (" + instanceMesh.subMeshCount + ")");
// extra materials don't have a meaning and it screws the rendering as Unity
// tries to render with those extra materials.
Material[] newMats = new Material[instanceMesh.subMeshCount];
for (int i = 0; i < instanceMesh.subMeshCount; ++i)
newMats[i] = filter.renderer.sharedMaterials[i];
filter.renderer.sharedMaterials = newMats;
materials = newMats;
}
for (int m = 0; m < System.Math.Min(materials.Length, instanceMesh.subMeshCount); ++m)
{
//;;Debug.Log(" new subset : " + m + ", tris " + instance.mesh.GetTriangles(m).Length);
MeshSubsetCombineUtility.SubMeshInstance subsetInstance = new MeshSubsetCombineUtility.SubMeshInstance();
subsetInstance.meshInstanceID = filter.sharedMesh.GetInstanceID();
subsetInstance.vertexOffset = verticesInBatch;
subsetInstance.subMeshIndex = m;
subsetInstance.gameObjectInstanceID = go.GetInstanceID();
subsetInstance.transform = instance.transform;
subsets.Add(subsetInstance);
subsetGOs.Add(go);
}
verticesInBatch += instanceMesh.vertexCount;
}
MakeBatch(meshes, subsets, subsetGOs, staticBatchRootTransform, batchIndex);
}
static private void MakeBatch(List<MeshSubsetCombineUtility.MeshInstance> meshes, List<MeshSubsetCombineUtility.SubMeshInstance> subsets, List<GameObject> subsetGOs, Transform staticBatchRootTransform, int batchIndex)
{
if (meshes.Count < 2)
return;
MeshSubsetCombineUtility.MeshInstance[] aMeshes = meshes.ToArray();
MeshSubsetCombineUtility.SubMeshInstance[] aSubsets = subsets.ToArray();
string combinedMeshName = CombinedMeshPrefix;
combinedMeshName += " (root: " + ((staticBatchRootTransform != null)? staticBatchRootTransform.name: "scene") + ")";
if (batchIndex > 0)
combinedMeshName += " " + (batchIndex + 1);
Mesh combinedMesh = StaticBatchingUtility.InternalCombineVertices (aMeshes, combinedMeshName);
StaticBatchingUtility.InternalCombineIndices(aSubsets, combinedMesh);
int subsetIndex = 0;
for (int item = 0; item < aSubsets.Length; item++)
{
MeshSubsetCombineUtility.SubMeshInstance i = aSubsets[item];
GameObject go = subsetGOs[item];
Mesh m = combinedMesh;
MeshFilter filter = (MeshFilter)go.GetComponent(typeof(MeshFilter));
filter.sharedMesh = m;
go.renderer.SetSubsetIndex(i.subMeshIndex, subsetIndex);
go.renderer.staticBatchRootTransform = staticBatchRootTransform;
// for some reason if GOs were created dynamically
// then we need to toggle renderer to avoid caching old geometry
go.renderer.enabled = false;
go.renderer.enabled = true;
subsetIndex++;
}
}
internal class SortGO : IComparer
{
int IComparer.Compare( object a, object b )
{
if (a == b)
return 0;
Renderer aRenderer = GetRenderer(a as GameObject);
Renderer bRenderer = GetRenderer(b as GameObject);
int compare = GetMaterialId(aRenderer).CompareTo(GetMaterialId(bRenderer));
if (compare == 0)
compare = GetLightmapIndex(aRenderer).CompareTo(GetLightmapIndex(bRenderer));
return compare;
}
static private int GetMaterialId(Renderer renderer)
{
if (renderer == null || renderer.sharedMaterial == null)
return 0;
return renderer.sharedMaterial.GetInstanceID();
}
static private int GetLightmapIndex(Renderer renderer)
{
if (renderer == null)
return -1;
return renderer.lightmapIndex;
}
static private Renderer GetRenderer(GameObject go)
{
if (go == null)
return null;
MeshFilter filter = go.GetComponent(typeof(MeshFilter)) as MeshFilter;
if (filter == null)
return null;
return filter.renderer;
}
}
}
} // namespace UnityEngine
#endif
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