public TerrainNodePage(Rect r, int m)
{
this.rect = r;
this.mip = m;
this.Info = new NodeInfo(new float4(r.xMin, r.yMin, r.width, r.height), m);
this.index = -1;
if (this.mip > 0)
{
children = new TerrainNodePage[4];
children[0] = new TerrainNodePage(new Rect(r.xMin, r.yMin, r.width / 2, r.height / 2), m - 1);
children[1] = new TerrainNodePage(new Rect(r.xMin + r.width / 2, r.yMin, r.width / 2, r.height / 2), m - 1);
children[2] = new TerrainNodePage(new Rect(r.xMin + r.width / 2, r.yMin + r.height / 2, r.width / 2, r.height / 2), m - 1);
children[3] = new TerrainNodePage(new Rect(r.xMin, r.yMin + r.height / 2, r.width / 2, r.height / 2), m - 1);
}
}
void OnEnable()
{
if (pageRoot == null)
{
float perSize = 64;
var rect = new Rect(0, 0, terrain.terrainData.size.x, terrain.terrainData.size.z);
pageRoot = new TerrainNodePage(rect);
var children = new List <TerrainNodePage>();
for (var i = rect.xMin; i < rect.xMax; i += perSize)
{
for (var j = rect.yMin; j < rect.yMax; j += perSize)
{
children.Add(new TerrainNodePage(new Rect(i, j, perSize, perSize), 3));
}
}
pageRoot.children = children.ToArray();
}
allNodeInfo = new List <NodeInfo>();
var camPos = Camera.main.transform.position;
var center = new Vector2(camPos.x, camPos.z);
pageRoot.CollectNodeInfo(center, allNodeInfo);
for (var i = 0; i < allNodeInfo.Count; i++)
{
var nodeInfo = allNodeInfo[i];
var nodeCenter = new Vector2(nodeInfo.rect.x + nodeInfo.rect.z * 0.5f, nodeInfo.rect.y + nodeInfo.rect.w * 0.5f);
var topNode = pageRoot.GetActiveNode(nodeCenter + new Vector2(0, nodeInfo.rect.w));
var bottomNode = pageRoot.GetActiveNode(nodeCenter + new Vector2(0, -nodeInfo.rect.w));
var leftNode = pageRoot.GetActiveNode(nodeCenter + new Vector2(-nodeInfo.rect.z, 0));
var rightNode = pageRoot.GetActiveNode(nodeCenter + new Vector2(nodeInfo.rect.z, 0));
var nei = new bool4(topNode != null && topNode.mip > nodeInfo.mip,
bottomNode != null && bottomNode.mip > nodeInfo.mip,
leftNode != null && leftNode.mip > nodeInfo.mip,
rightNode != null && rightNode.mip > nodeInfo.mip);
nodeInfo.neighbor = (1 * (nei.x ? 1 : 0)) + ((1 << 1) * (nei.y ? 1 : 0)) + ((1 << 2) * (nei.z ? 1 : 0)) + ((1 << 3) * (nei.w ? 1 : 0));
allNodeInfo[i] = nodeInfo;
}
heightmapTex = terrain.terrainData.heightmapTexture;
normalTex = new Texture2D(heightmapTex.width, heightmapTex.height, TextureFormat.RGBA32, -1, true);
var colors = new Color[heightmapTex.width * heightmapTex.width];
int index = 0;
for (int i = 0; i < heightmapTex.width; i++)
{
for (int j = 0; j < heightmapTex.height; j++)
{
var normal = terrain.terrainData.GetInterpolatedNormal((float)i / heightmapTex.width, (float)j / heightmapTex.height);
colors[index++] = new Color(normal.z * 0.5f + 0.5f, normal.y * 0.5f + 0.5f, normal.x * 0.5f + 0.5f);
}
}
normalTex.SetPixels(colors);
normalTex.Apply();
allInstancesPosWSBuffer = new ComputeBuffer(allNodeInfo.Count, sizeof(float) * 4 + sizeof(int) + sizeof(int));
allInstancesPosWSBuffer.SetData(allNodeInfo.ToArray());
visibleInstancesOnlyPosWSIDBuffer = new ComputeBuffer(allNodeInfo.Count, sizeof(uint), ComputeBufferType.Append);
if (argsBuffer != null)
{
argsBuffer.Release();
}
uint[] args = new uint[5] {
0, 0, 0, 0, 0
};
argsBuffer = new ComputeBuffer(1, args.Length * sizeof(uint), ComputeBufferType.IndirectArguments);
args[0] = (uint)instanceMesh.GetIndexCount(0);
args[1] = (uint)allNodeInfo.Count;
args[2] = (uint)instanceMesh.GetIndexStart(0);
args[3] = (uint)instanceMesh.GetBaseVertex(0);
args[4] = 0;
argsBuffer.SetData(args);
if (shadowBuffer != null)
{
shadowBuffer.Release();
}
shadowBuffer = new ComputeBuffer(1, args.Length * sizeof(uint), ComputeBufferType.IndirectArguments);
shadowBuffer.SetData(args);
cullTerrainKernel = this.cullingComputeShader.FindKernel("CullTerrain");
cullTerrainShadowKernel = this.cullingComputeShader.FindKernel("CullTerrainShadow");
cullingComputeShader.SetBuffer(cullTerrainKernel, "_AllInstancesPosWSBuffer", allInstancesPosWSBuffer);
cullingComputeShader.SetBuffer(cullTerrainKernel, "_VisibleInstancesOnlyPosWSIDBuffer", visibleInstancesOnlyPosWSIDBuffer);
cullingComputeShader.SetTexture(cullTerrainKernel, "_HeightMap", heightmapTex);
cullingComputeShader.SetBuffer(cullTerrainShadowKernel, "_AllInstancesPosWSBuffer", allInstancesPosWSBuffer);
cullingComputeShader.SetBuffer(cullTerrainShadowKernel, "_VisibleInstancesOnlyPosWSIDBuffer", visibleInstancesOnlyPosWSIDBuffer);
cullingComputeShader.SetTexture(cullTerrainShadowKernel, "_HeightMap", heightmapTex);
cullingComputeShader.SetFloat("_TerrainHeightSize", 2 * terrain.terrainData.size.y);
mat.SetBuffer("_AllInstancesTransformBuffer", allInstancesPosWSBuffer);
mat.SetBuffer("_VisibleInstanceOnlyTransformIDBuffer", visibleInstancesOnlyPosWSIDBuffer);
Shader.SetGlobalTexture("_TerrainHeightmapTexture", heightmapTex);
Shader.SetGlobalTexture("_TerrainNormalmapTexture", normalTex);
Shader.SetGlobalVector("terrainParam", terrain.terrainData.size);
debugtex = new RenderTexture(1024, 1024, 0, UnityEngine.Experimental.Rendering.DefaultFormat.LDR);
debugtex.enableRandomWrite = true;
ShadowUtils.CustomRenderShadowSlice += this.RenderShadowmap;
GPUTerrainPass.ExecuteAction += Render;
}
