public static TerrainChunk CreateChunk(MarchingRegion region, MarchingTerrain terrain, Material material, bool generate = true)
{
var chunkGameObject = new GameObject($"chunk({region.X},{region.Y},{region.Z})");
var chunk = chunkGameObject.AddComponent <TerrainChunk>();
chunkGameObject.transform.position = new Vector3(region.X, region.Y, region.Z);
chunk.x = region.X / region.Width;
chunk.y = region.Y / region.Height;
chunk.z = region.Z / region.Length;
chunk.Terrain = terrain;
chunk.region = region;
chunk.marching = new Marching();
chunk.meshFilter = chunk.AddComponentIfNotAdded <MeshFilter>();
chunk.meshRenderer = chunk.AddComponentIfNotAdded <MeshRenderer>();
chunk.meshRenderer.material = material;
if (generate)
{
chunk.Generate();
}
return(chunk);
}
public Mesh Generate(int lodLevel, MarchingRegion region, TerrainMap map)
{
triangle_Index = 0;
vertice_Index = 0;
float[] cubeData = new float[8];
for (int x = region.X; x < region.Right; x += lodLevel)
{
for (int y = region.Y; y < region.Top; y += lodLevel)
{
for (int z = region.Z; z < region.Forward; z += lodLevel)
{
Color color = map.GetColor(x, y, z);
GetHue(color, out float u, out float v);
int flagIndex = 0;
Vector3 point = new Vector3(
x % region.Width,
y % region.Height,
z % region.Length);
for (int i = 0; i < 8; i++)
{
int ix = x + MarchingData.VertexOffset[i].x * lodLevel;
int iy = y + MarchingData.VertexOffset[i].y * lodLevel;
int iz = z + MarchingData.VertexOffset[i].z * lodLevel;
float surface = map.GetSurface(ix, iy, iz);
if (surface <= threshould)
{
flagIndex |= 1 << i;
}
cubeData[i] = surface;
}
March(lodLevel, point, u, v, flagIndex, cubeData);
}
}
}
Mesh mesh = new Mesh();
mesh.SetVertices(vertices, 0, vertice_Index);
mesh.SetTriangles(triangles, 0, triangle_Index, 0);
mesh.SetUVs(0, uvs, 0, vertice_Index);
mesh.RecalculateBounds();
mesh.RecalculateNormals();
return(mesh);
}