/// <summary>
/// Generate the mesh for a chunk
/// </summary>
/// <param name="chunk"></param>
/// <param name="lodLevel"></param>
/// <param name="forceReGenerate"></param>
public void GenerateChunkMesh(float lodLevel = 10, bool forceReGenerate = false)
{
if (!forceReGenerate && MathUtility.CompareLodLevel(LODLevel, lodLevel))
{
return;
}
MeshData meshData = TerrainGeneration.AllMeshData[lodLevel];
Vector3[] vertices = meshData.Vertices;
Color[] colors = meshData.Colours;
for (int x = 0; x < vertices.Length; x++)
{
float xCoord = (vertices[x].x + Position.x / Scale.x);
float zCoord = (vertices[x].z + Position.z / Scale.z);
vertices[x].y = TerrainGeneration.SampleHeightMapLocal(xCoord, zCoord);
if (vertices[x].y < TerrainGeneration.instance.WaterLayer.position.y)
{
colors[x] = TerrainGeneration.instance.UnderWaterColour;
}
else
{
float colourHeight = Mathf.InverseLerp(_minColourHeight, _maxColourHeight, vertices[x].y);
colors[x] = TerrainGeneration.instance.TerrainColours.Evaluate(colourHeight);
}
// Fix the seams between different size meshes
if (TerrainGeneration.instance.IsFixingTerrainSeams && lodLevel < TerrainGeneration.instance.FarLodSize)
{
float widthSize = (TerrainGeneration.ChunkScale.x + lodLevel) / lodLevel;
float previousHeight;
float nextHeight;
float result;
if (ChunkNeighbours[3].LODLevel > LODLevel && Math.Abs(x % (widthSize * 2)) < _widthSizeTolerance && x != 0)
{
previousHeight = vertices[x - (int)(widthSize * 2)].y;
nextHeight = vertices[x].y;
result = (previousHeight + nextHeight) / 2;
vertices[x - (int)widthSize].y = result;
}
if (ChunkNeighbours[1].LODLevel > LODLevel && x < widthSize && x % 2 == 0 && x != 0)
{
previousHeight = vertices[x - 2].y;
nextHeight = vertices[x].y;
result = (previousHeight + nextHeight) / 2;
vertices[x - 1].y = result;
}
if (ChunkNeighbours[0].LODLevel > LODLevel && x > vertices.Length - widthSize && x % 2 == 0 && x != 0)
{
previousHeight = vertices[x - 2].y;
nextHeight = vertices[x].y;
result = (previousHeight + nextHeight) / 2;
vertices[x - 1].y = result;
}
// x % (widthSize * 2) == (widthSize * 2) - 1
if (ChunkNeighbours[2].LODLevel > LODLevel && Math.Abs(x % (widthSize * 2) - ((widthSize * 2) - 1)) < _widthSizeTolerance && x != 0)
{
previousHeight = vertices[x - (int)(widthSize)].y;
nextHeight = TerrainGeneration.SampleHeightMapLocal(vertices[x + (int)(widthSize)].x + Position.x / Scale.x, vertices[x + (int)(widthSize)].z + Position.z / Scale.z);
result = (nextHeight + previousHeight) / 2;
vertices[x].y = result;
}
}
}
_vertices = vertices;
_uvs = meshData.Uvs;
_tris = meshData.Tris;
_colors = colors;
//chunk.LODLevel = lodLevel;
}
