public void RequestWorldChunkMeshData(WorldChunk chunk, WorldChunkSideBorders sideBorder, WorldChunkSettings setting, Action <MeshData> callback)
{
ThreadStart threadStart = delegate {
// Loading
MeshData meshData = MeshGenerator.GenerateWorldChunkMesh(chunk, sideBorder, setting);
lock (chunkMeshThreadInQueue) {
chunkMeshThreadInQueue.Enqueue(new MeshDataThreadInfo <MeshData>(callback, meshData));
}
// End Loading..
};
new Thread(threadStart).Start();
}
public static MeshData GenerateWorldChunkMesh(WorldChunk chunk, WorldChunkSideBorders borders, WorldChunkSettings setting)
{
int size = setting.scaledSize;
int meshSize = size + 1; // One line on top/left to create the triangles between chunks
int borderedSize = meshSize + 2; // One line on every direction to calculate normals of triangle on the border of mesh
float offset = (meshSize - 1) / -2f;
MeshData meshData = new MeshData(meshSize);
// To handle normals, the mesh have to generate vertices for 1line on each 8chunks bordered
int[,] vertexIndicesMap = CreateVertexIndicesMap(borderedSize);
for (int y = 0; y < borderedSize; y++)
{
for (int x = 0; x < borderedSize; x++)
{
Coord chunkCoord = new Coord(x - 1, y - 1, setting); // It's start with [-1;-1]
int vertexIndex = vertexIndicesMap [x, y];
float height = chunk.GetHeightValue(chunkCoord, setting);
Vector2 uv = new Vector2((x - 1) / (float)(borderedSize - 2), (y - 1) / (float)(borderedSize - 2));
Vector3 vertexPosition = new Vector3(
offset + uv.x * meshSize,
height,
offset + uv.y * meshSize
);
meshData.AddOrUpdateVertex(vertexPosition, uv, vertexIndex);
if (x <= borderedSize - 2 && y <= borderedSize - 2)
{
int a = vertexIndicesMap[x, y];
int b = vertexIndicesMap[x + 1, y];
int c = vertexIndicesMap[x, y + 1];
int d = vertexIndicesMap[x + 1, y + 1];
// Clockwise
// meshData.AddTriangle (a, d, c);
// meshData.AddTriangle (d, a, b);
// Counter Clockwise
meshData.AddTriangle(c, d, a);
meshData.AddTriangle(b, a, d);
}
}
}
return(meshData);
}
public void OnChunkMerged()
{
WorldChunkSettings setting = MapEngine.instance.worldChunkSetting;
this.state = ChunkStates.Merged;
if (this.requireState < ChunkStates.Merged) // If all the chunk is merged but wasn't required for (ex: side chunk with not border)
{
this.requireState = ChunkStates.Merged;
}
MapDisplay.instance.UpdateChunkDisplay(this);
this.isMeshing = true;
// Create the first time the chunk borders values
this.chunkBorders = new WorldChunkSideBorders(this, setting);
// Request Mesh data
MapThreading.instance.RequestWorldChunkMeshData(this, this.chunkBorders, setting, OnWorldChunkMeshReceived);
}
