void SetLod(List <int> quadKeys, int lodBias)
{
List <Vector2> quadLODList = new List <Vector2>();
for (int i = 0; i < quadKeys.Count; i++)
{
int quadKey = quadKeys[i];
int mip = MortonUtility.getMip(quadKey) + lodBias;
quadLODList.Add(new Vector2(mip, mip));
quadLODList.Add(new Vector2(mip, mip));
quadLODList.Add(new Vector2(mip, mip));
quadLODList.Add(new Vector2(mip, mip));
}
mQuads.SetUVs(1, quadLODList);
}
public void GeneratePage()
{
if (TilesToGenerate.Count == 0)
{
return;
}
//print("generating page" + Time.frameCount + " " + TilesToGenerate.Count);
List <int> TilesForMesh = new List <int>();
// 优先处理mipmap等级高的tile
TilesToGenerate.Sort((x, y) => { return(MortonUtility.getMip(x).CompareTo(MortonUtility.getMip(y))); });
//一次最多贴5个
for (int i = 0; TilesToGenerate.Count > 0; i++)
{
int quadKey = TilesToGenerate[TilesToGenerate.Count - 1];
TilesToGenerate.RemoveAt(TilesToGenerate.Count - 1);
TilesForMesh.Add(quadKey);
}
SetUpMesh(TilesForMesh);
RenderBuffer[] colorBuffers = new RenderBuffer[1];
for (int textureType = 0; textureType < physicalTexture.NumTextureType; textureType++)
{
colorBuffers[0] = physicalTexture.PhysicalTextures[textureType].colorBuffer;
RenderBuffer depthBuffer = physicalTexture.PhysicalTextures[textureType].depthBuffer;
for (int i = 0; i < 10; i++)
{
SetLod(TilesForMesh, i);
RenderTargetSetup rtsMip = new RenderTargetSetup(colorBuffers, depthBuffer, i, CubemapFace.Unknown);
Graphics.SetRenderTarget(rtsMip);
CommandBuffer tempCB = new CommandBuffer();
tempCB.DrawMesh(mQuads, Matrix4x4.identity, TileGeneratorMat, 0, textureType);
//tempCB.DrawMesh(mQuads, Matrix4x4.identity, TileGeneratorMat);
Graphics.ExecuteCommandBuffer(tempCB);
}
}
OnTileGenerationComplete?.Invoke(TilesForMesh);
}
private void SetUpMesh(List <int> quadKeys)
{
List <Vector3> quadVertexList = new List <Vector3>();
List <int> quadTriangleList = new List <int>();
List <Vector2> quadUVList = new List <Vector2>();
List <Vector2> quadLODList = new List <Vector2>();
int tableSize = pageTable.TableSize;
//有可能出现的最高mip
int maxMip = (int)Math.Log(tableSize, 2);
mQuads = new Mesh();
for (int i = 0; i < quadKeys.Count; i++)
{
int quadKey = quadKeys[i];
int mip = MortonUtility.getMip(quadKey);
Vector2Int pageXY = MortonUtility.getPageXY(quadKey);
//最高mip到当前mip的偏移
int mipBias = maxMip - mip;
float rectBaseLength = 1.0f / (float)tableSize;
float currMipRectLength = 1.0f / (float)Math.Pow(2.0, mipBias);
float paddingLength = currMipRectLength * ((float)physicalTexture.PaddingSize / (float)physicalTexture.TileSize);
Vector2 uv0 = new Vector2((float)pageXY.x * rectBaseLength - paddingLength, (float)pageXY.y * rectBaseLength - paddingLength);
Vector2 uv1 = new Vector2((float)pageXY.x * rectBaseLength + currMipRectLength + paddingLength, (float)pageXY.y * rectBaseLength - paddingLength);
Vector2 uv2 = new Vector2((float)pageXY.x * rectBaseLength + currMipRectLength + paddingLength, (float)pageXY.y * rectBaseLength + currMipRectLength + paddingLength);
Vector2 uv3 = new Vector2((float)pageXY.x * rectBaseLength - paddingLength, (float)pageXY.y * rectBaseLength + currMipRectLength + paddingLength);
quadUVList.Add(uv0);
quadUVList.Add(uv1);
quadUVList.Add(uv2);
quadUVList.Add(uv3);
float Width = (float)physicalTexture.PhysicalTextureSize.x;
float Height = (float)physicalTexture.PhysicalTextureSize.y;
Vector2Int tile = m_TilePool.RequestTile(mip, Time.frameCount);
//SetActive(tile);
//TODO 加tiling offset
Vector3 vertex0;
Vector3 vertex1;
Vector3 vertex2;
Vector3 vertex3;
if (SystemInfo.graphicsDeviceType.ToString().Contains("Direct3D"))
{
vertex0 = new Vector3(tile.x * 2 / Width - 1, (Height - tile.y) * 2 / Height - 1, 0.1f);
vertex1 = new Vector3((tile.x + 1) * 2 / Width - 1, (Height - tile.y) * 2 / Height - 1, 0.1f);
vertex2 = new Vector3((tile.x + 1) * 2 / Width - 1, (Height - tile.y - 1) * 2 / Height - 1, 0.1f);
vertex3 = new Vector3(tile.x * 2 / Width - 1, (Height - tile.y - 1) * 2 / Height - 1, 0.1f);
}
else
{
vertex0 = new Vector3(tile.x * 2 / Width - 1, tile.y * 2 / Height - 1, 0.1f);
vertex1 = new Vector3((tile.x + 1) * 2 / Width - 1, tile.y * 2 / Height - 1, 0.1f);
vertex2 = new Vector3((tile.x + 1) * 2 / Width - 1, (tile.y + 1) * 2 / Height - 1, 0.1f);
vertex3 = new Vector3(tile.x * 2 / Width - 1, (tile.y + 1) * 2 / Height - 1, 0.1f);
}
quadVertexList.Add(vertex0);
quadVertexList.Add(vertex1);
quadVertexList.Add(vertex2);
quadVertexList.Add(vertex3);
quadTriangleList.Add(4 * i);
quadTriangleList.Add(4 * i + 1);
quadTriangleList.Add(4 * i + 2);
quadTriangleList.Add(4 * i + 2);
quadTriangleList.Add(4 * i + 3);
quadTriangleList.Add(4 * i);
//Mapping Processsssss
// morton version
/*pageTable.AddressMapping[quadKey].TileIndex = tile;
*
* int oldQuad;
* if(physicalTexture.TileToQuadMapping.TryGetValue(tile,out oldQuad))
* {
* pageTable.AddressMapping.Remove(oldQuad);
* }*/
//Pointer version
int oldQuad;
if (physicalTexture.TileToQuadMapping.TryGetValue(tile, out oldQuad))
{
pageTable.m_Pages[oldQuad].Payload.tileStatus = TileStatus.Uninitialized;
pageTable.m_Pages.Remove(oldQuad);
}
physicalTexture.TileToQuadMapping[tile] = quadKey;
pageTable.m_Pages[quadKey].Payload.TileIndex = tile;
}
mQuads.SetVertices(quadVertexList);
mQuads.SetUVs(0, quadUVList);
mQuads.SetTriangles(quadTriangleList, 0);
}