/// <summary>
/// 拆分地形
/// </summary>
/// <param name="iSaveDir">保存路径</param>
/// <param name="iLayerLevel">地形层级</param>
/// <param name="iTileIndex">地形的Tile索引</param>
/// <param name="iSlicingCount">单个地形的拆分个数。(如：2x2 则为2)</param>
/// <param name="iTerrainObj">地形对象</param>
/// <param name="iChunkTileIndex">单个地形的拆分成chunk后的tile索引</param>
/// <param name="iUpdateProgress">进度更新委托</param>
private void SplitTerrains(
string iSaveDir, int iLayerLevel,
Vector2 iTileIndex, int iSlicingCount,
GameObject iTerrainObj, Vector2 iChunkTileIndex,
ProgressBarUpdate iUpdateProgress = null)
{
if (string.IsNullOrEmpty(iSaveDir))
{
return;
}
if (0 >= iSlicingCount)
{
return;
}
if (null == iTerrainObj)
{
Error("SplitTerrains():The gameobject is null or invalid in hierarchy!!!");
return;
}
var terrain = iTerrainObj.GetComponent <Terrain>();
if (null == terrain)
{
Error("SplitTerrains():There is no component named terrain in the gameobject(name:{0})!!!",
iTerrainObj.name);
return;
}
// 地形数据
var terrainData = terrain.terrainData;
// 地形尺寸
var terrainSize = terrainData.size;
// 得到地图分辨率
var newHeightmapResolution = (terrainData.heightmapResolution - 1) / iSlicingCount;
var newAlphamapResolution = terrainData.alphamapResolution / iSlicingCount;
var newbaseMapResolution = terrainData.baseMapResolution / iSlicingCount;
// 溅斑原型列表
var splatProtos = terrainData.splatPrototypes;
var x = (int)iChunkTileIndex.x;
var y = (int)iChunkTileIndex.y;
//创建资源
// 地形拆分chunk保存路径
var morton = TerrainsSettings.Morton(iTileIndex, iChunkTileIndex, iSlicingCount, iLayerLevel);
var chunkName = string.Format("{0}{1}.asset", TerrainsSettings.ChunkNamePrefix, morton);
var savePath = string.Format("{0}/{1}", iSaveDir, chunkName);
// 更新进度 - 拆分开始
if (null != iUpdateProgress)
{
var statusTxt = string.Format("拆分开始:{0}...", chunkName);
iUpdateProgress(statusTxt, false);
}
var newData = new TerrainData();
if (null == newData)
{
Error("SplitTerrains():Failed!!(SavePath:{0})",
savePath);
return;
}
AssetDatabase.CreateAsset(newData, savePath);
//设置分辨率参数
newData.heightmapResolution = newHeightmapResolution;
newData.alphamapResolution = newAlphamapResolution;
newData.baseMapResolution = newbaseMapResolution;
//设置大小
newData.size = new Vector3(terrainSize.x / iSlicingCount, terrainSize.y, terrainSize.z / iSlicingCount);
//设置地形原型
var newSplats = new SplatPrototype[splatProtos.Length];
for (var i = 0; i < splatProtos.Length; ++i)
{
newSplats[i] = new SplatPrototype
{
texture = splatProtos[i].texture, tileSize = splatProtos[i].tileSize
};
var offsetX = (newData.size.x * x) % splatProtos[i].tileSize.x + splatProtos[i].tileOffset.x;
var offsetY = (newData.size.z * y) % splatProtos[i].tileSize.y + splatProtos[i].tileOffset.y;
newSplats[i].tileOffset = new Vector2(offsetX, offsetY);
}
newData.splatPrototypes = newSplats;
//设置混合贴图
var alphamap = new float[newAlphamapResolution, newAlphamapResolution, splatProtos.Length];
alphamap = terrainData.GetAlphamaps(
x * newData.alphamapWidth,
y * newData.alphamapHeight,
newData.alphamapWidth,
newData.alphamapHeight);
newData.SetAlphamaps(0, 0, alphamap);
//设置高度
var xBase = (terrainData.heightmapWidth - 1) / iSlicingCount;
var yBase = (terrainData.heightmapHeight - 1) / iSlicingCount;
var height = terrainData.GetHeights(xBase * x, yBase * y, xBase + 1, yBase + 1);
newData.SetHeights(0, 0, height);
AssetDatabase.SaveAssets();
// 更新进度 - 拆分成功
if (null != iUpdateProgress)
{
var statusTxt = string.Format("拆分成功:{0}", chunkName);
iUpdateProgress(statusTxt, true);
}
}