void CreateMergedLODGroupFromSingleMaterialMeshes()
{
string path = EditorUtility.SaveFilePanelInProject("Save merged mesh", "", "",
"Please enter a file name to save the merged mesh to");
if (path.Length != 0)
{
if (_lodGroupVegetationMeshCombiner.TargetGameObject == null)
{
return;
}
LODGroup lodGroup = _lodGroupVegetationMeshCombiner.TargetGameObject.GetComponentInChildren <LODGroup>();
GameObject sourceObject = _lodGroupVegetationMeshCombiner.TargetGameObject;
Vector3 targetPosition = sourceObject.transform.position;
Quaternion targetRotation = sourceObject.transform.rotation;
Vector3 targetScale = sourceObject.transform.localScale;
sourceObject.transform.position = new Vector3(0, 0, 0);
sourceObject.transform.rotation = Quaternion.identity;
sourceObject.transform.localScale = Vector3.one;
if (lodGroup == null)
{
return;
}
GameObject mergedLODGroupObject = new GameObject("Merged_" + sourceObject.name);
LODGroup newLODGroup = mergedLODGroupObject.AddComponent <LODGroup>();
List <CombineInstance> combineInstanceList = new List <CombineInstance>();
LOD[] lods = lodGroup.GetLODs();
// ReSharper disable once InconsistentNaming
LOD[] newLODs = lodGroup.GetLODs();
for (int i = 0; i <= lods.Length - 1; i++)
{
combineInstanceList.Clear();
LOD lod = lods[i];
if (lod.renderers.Length > 0)
{
GameObject lodObject = new GameObject(sourceObject.name + "_LOD" + i.ToString());
lodObject.transform.SetParent(mergedLODGroupObject.transform);
MeshRenderer meshRenderer = lodObject.AddComponent <MeshRenderer>();
MeshFilter meshFilter = lodObject.AddComponent <MeshFilter>();
Renderer[] newRenderers = new Renderer[1];
newRenderers[0] = meshRenderer;
newLODs[i].renderers = newRenderers;
List <Material> materialList = new List <Material>();
for (int j = 0; j <= lod.renderers.Length - 1; j++)
{
MeshFilter tempMeshFilter = lod.renderers[j].gameObject.GetComponent <MeshFilter>();
if (!tempMeshFilter)
{
continue;
}
CombineInstance combineInstance = new CombineInstance
{
mesh = tempMeshFilter.sharedMesh, transform = meshFilter.transform.localToWorldMatrix
};
combineInstanceList.Add(combineInstance);
materialList.Add(lod.renderers[j].sharedMaterial);
}
Mesh mesh = new Mesh();
Material[] materials = materialList.ToArray();
mesh.CombineMeshes(combineInstanceList.ToArray(), false, true);
if (_lodGroupVegetationMeshCombiner.MergeSubmeshesWitEquialMaterial)
{
SubmeshCombiner submeshCombiner = new SubmeshCombiner();
for (int j = 0; j <= mesh.subMeshCount - 1; j++)
{
submeshCombiner.AddSubmesh(mesh.GetIndices(j), materials[j]);
}
submeshCombiner.UpdateMesh(mesh);
materials = submeshCombiner.GetMaterials();
}
meshFilter.sharedMesh = mesh;
AssetDatabase.CreateAsset(meshFilter.sharedMesh, path + "_LOD" + i.ToString() + ".asset");
meshRenderer.materials = materials;
}
}
newLODGroup.SetLODs(newLODs);
sourceObject.transform.position = targetPosition;
sourceObject.transform.rotation = targetRotation;
sourceObject.transform.localScale = targetScale;
}
}
public static GameObject CombineMeshes(GameObject sourceGameObject, bool mergeSubmeshesWitEquialMaterial)
{
MeshFilter[] meshFilters = sourceGameObject.GetComponentsInChildren <MeshFilter>();
MeshRenderer[] meshRenderers = sourceGameObject.GetComponentsInChildren <MeshRenderer>();
Vector3 targetPosition = sourceGameObject.transform.position;
Quaternion targetRotation = sourceGameObject.transform.rotation;
Vector3 targetScale = sourceGameObject.transform.localScale;
sourceGameObject.transform.position = new Vector3(0, 0, 0);
sourceGameObject.transform.rotation = Quaternion.identity;
sourceGameObject.transform.localScale = Vector3.one;
CombineInstance[] combine = new CombineInstance[meshFilters.Length];
int i = 0;
while (i < meshFilters.Length)
{
combine[i].mesh = meshFilters[i].sharedMesh;
combine[i].transform = meshFilters[i].transform.localToWorldMatrix;
i++;
}
GameObject mergedMesh = new GameObject(sourceGameObject.name + "_Merged");
mergedMesh.transform.position = new Vector3(0, 0, 0);
mergedMesh.transform.rotation = Quaternion.identity;
mergedMesh.transform.localScale = Vector3.one;
MeshFilter meshFilter = mergedMesh.AddComponent <MeshFilter>();
meshFilter.mesh = new Mesh();
meshFilter.sharedMesh.CombineMeshes(combine, false, true);
MeshRenderer meshRenderer = mergedMesh.AddComponent <MeshRenderer>();
List <Material> materialList = new List <Material>();
for (int j = 0; j <= meshRenderers.Length - 1; j++)
{
materialList.AddRange(meshRenderers[j].sharedMaterials);
}
Material[] materials = materialList.ToArray();
meshRenderer.sharedMaterials = materials;
if (mergeSubmeshesWitEquialMaterial)
{
SubmeshCombiner submeshCombiner = new SubmeshCombiner();
for (int j = 0; j <= meshFilter.sharedMesh.subMeshCount - 1; j++)
{
submeshCombiner.AddSubmesh(meshFilter.sharedMesh.GetIndices(j), materials[j]);
}
submeshCombiner.UpdateMesh(meshFilter.sharedMesh);
meshRenderer.sharedMaterials = submeshCombiner.GetMaterials();
}
sourceGameObject.transform.position = targetPosition;
sourceGameObject.transform.rotation = targetRotation;
sourceGameObject.transform.localScale = targetScale;
mergedMesh.transform.position = targetPosition;
mergedMesh.transform.rotation = targetRotation;
mergedMesh.transform.localScale = targetScale;
return(mergedMesh);
}
void CreateMergedLODGroup()
{
string path = EditorUtility.SaveFilePanelInProject("Save merged mesh", "", "",
"Please enter a file name to save the merged mesh to");
if (path.Length != 0)
{
if (_lodGroupVegetationMeshCombiner.TargetGameObject == null)
{
return;
}
LODGroup lodGroup = _lodGroupVegetationMeshCombiner.TargetGameObject.GetComponentInChildren <LODGroup>();
GameObject sourceObject = _lodGroupVegetationMeshCombiner.TargetGameObject;
Vector3 targetPosition = sourceObject.transform.position;
Quaternion targetRotation = sourceObject.transform.rotation;
Vector3 targetScale = sourceObject.transform.localScale;
sourceObject.transform.position = new Vector3(0, 0, 0);
sourceObject.transform.rotation = Quaternion.identity;
sourceObject.transform.localScale = Vector3.one;
if (lodGroup == null)
{
return;
}
GameObject mergedLODGroupObject = new GameObject("Merged_" + sourceObject.name);
LODGroup newLODGroup = mergedLODGroupObject.AddComponent <LODGroup>();
LOD[] lods = lodGroup.GetLODs();
// ReSharper disable once InconsistentNaming
LOD[] newLODs = lodGroup.GetLODs();
for (int i = 0; i <= lods.Length - 1; i++)
{
LOD lod = lods[i];
if (lod.renderers.Length > 0)
{
GameObject lodObject = new GameObject(sourceObject.name + "_LOD" + i.ToString());
lodObject.transform.SetParent(mergedLODGroupObject.transform);
MeshRenderer meshRenderer = lodObject.AddComponent <MeshRenderer>();
MeshFilter meshFilter = lodObject.AddComponent <MeshFilter>();
Renderer renderer = lod.renderers[0];
MeshFilter tempMeshFilter = lod.renderers[0].gameObject.GetComponent <MeshFilter>();
Renderer[] newRenderers = new Renderer[1];
newRenderers[0] = meshRenderer;
newLODs[i].renderers = newRenderers;
newLODs[i].screenRelativeTransitionHeight = (float)1 / (i + 1);
Mesh mesh = Instantiate(tempMeshFilter.sharedMesh);
Material[] materials = renderer.sharedMaterials;
SubmeshCombiner submeshCombiner = new SubmeshCombiner();
for (int j = 0; j <= mesh.subMeshCount - 1; j++)
{
submeshCombiner.AddSubmesh(mesh.GetIndices(j), materials[j]);
}
submeshCombiner.UpdateMesh(mesh);
materials = submeshCombiner.GetMaterials();
meshFilter.sharedMesh = mesh;
AssetDatabase.CreateAsset(meshFilter.sharedMesh, path + "_LOD" + i.ToString() + ".asset");
meshRenderer.materials = materials;
}
}
newLODGroup.SetLODs(newLODs);
sourceObject.transform.position = targetPosition;
sourceObject.transform.rotation = targetRotation;
sourceObject.transform.localScale = targetScale;
}
}
