private bool InitData(GPUInstanceData instanceData)
{
if (instanceData == null || !instanceData.HasData)
{
lastInstanceID = 0;
return(false);
}
if (lastInstanceID == instanceData.GetInstanceID())
{
return(true);
}
lastInstanceID = instanceData.GetInstanceID();
GPUInstanceData.InstanceTile[] tiles = instanceData.InstanceTiles;
int countPerInstance = instanceData.CountPerInstance;
instanceMaterial = instanceData.InstanceMaterial;
instanceMesh = instanceData.InstanceMesh;
castShadow = instanceData.CastShadow;
TileDatas = new TileData[tiles.Length];
for (int i = 0; i < TileDatas.Length; i++)
{
TileDatas[i].bounds = tiles[i].bounds;
TileDatas[i].matrix4X4sList = new List <Matrix4x4[]>();
if (tiles[i].batchCount == 1)
{
TileDatas[i].matrix4X4sList.Add(tiles[i].localToWorld);
}
else
{
//tile内的总mesh数量可能大于合批数量 所以先拆分数组
//在这里拆分而不是烘焙时拆分是因为 List<Matrix4x4[]> 无法序列化
//前几批的数组
int j;
for (j = 0; j < tiles[i].batchCount - 1; j++)
{
Matrix4x4[] matrix4x4s = new Matrix4x4[countPerInstance];
Array.Copy(tiles[i].localToWorld, j * countPerInstance, matrix4x4s, 0, countPerInstance);
TileDatas[i].matrix4X4sList.Add(matrix4x4s);
}
//最后一个批次的矩阵数组
int totalCount = tiles[i].localToWorld.Length;
int lastCount = totalCount - (tiles[i].batchCount - 1) * countPerInstance;
if (lastCount > 0)
{
Matrix4x4[] lastMatrix4x4s = new Matrix4x4[lastCount];
Array.Copy(tiles[i].localToWorld, j * countPerInstance, lastMatrix4x4s, 0, lastCount);
TileDatas[i].matrix4X4sList.Add(lastMatrix4x4s);
}
}
}
return(true);
}
private void OnDisable()
{
Instance = null;
}
public static GPUInstanceData Instance; //全局唯一 便于render feature调用
private void OnEnable()
{
Instance = this;
this.gameObject.name = "GPU Instanced Data";
}
