private TerrainBlock.Type SetBlockTypeAt(TerrainChunk chunk, Index3D blockLocalIndex, TerrainBlock.Type blockNewType)
{
var blockType = chunk.GetBlock(blockLocalIndex).BlockType;
chunk.SetBlockType(blockLocalIndex, blockNewType);
chunkGenerator.BuildMeshFor(chunk);
return(blockType);
}
/// <summary>
/// This was also inspired by Sam's code: https://github.com/samhogan/Minecraft-Unity3D
/// However, I've changed the algorithm to fix an issue with trees too close to the
/// border of the chunk. I calculate the size of the leaves first, then I use this size
/// to constrain where the trunk can be inside the chunk: I avoid placing it too close
/// to the border of the chunk.
/// </summary>
public void Generate(FastNoise noise)
{
var simplex = noise.GetSimplex(chunk.Index.X * 0.8f, chunk.Index.Z * 0.8f);
if (simplex > 0.0f)
{
var numberOfTrees = rand.Next(0, (int)(10.0f * simplex));
for (var i = 0; i < numberOfTrees; ++i)
{
var treeHeight = rand.Next(3, 14);
var leavesWidth = rand.Next(2, 8);
var leavesHalfWidth = leavesWidth / 2;
var trunkX = rand.Next(chunk.MinBlockIndex.X + leavesHalfWidth, chunk.MaxBlockIndex.X - leavesHalfWidth + 1);
var trunkZ = rand.Next(chunk.MinBlockIndex.Z + leavesHalfWidth, chunk.MaxBlockIndex.Z - leavesHalfWidth + 1);
var trunkBlocks = CalculateTreeTrunkIndices(treeHeight, trunkX, trunkZ).ToList();
if (trunkBlocks.Count() > 0)
{
foreach (var index in trunkBlocks)
{
chunk.SetBlockType(index, TerrainBlock.Type.TreeTrunk);
}
var trunkBaseIndex = trunkBlocks.FirstOrDefault();
foreach (var index in CalculateTreeLeavesIndices(trunkBaseIndex, treeHeight, leavesHalfWidth))
{
chunk.SetBlockType(index, TerrainBlock.Type.TreeLeaves);
}
}
}
}
}