private HashSet <HeightMapNode> GetNonDiagonalNeighbours(HeightMapNode node)
{
return(new HashSet <HeightMapNode> (new[]
{
GetNode(node.GetX() + 1, node.GetY()),
GetNode(node.GetX() - 1, node.GetY()),
GetNode(node.GetX(), node.GetY() + 1),
GetNode(node.GetX(), node.GetY() - 1),
}.Where(pos => InBounds(pos.GetX(), pos.GetY()))
));
}
private Vector3 HeightmapNodeToWorldSpace(HeightMapNode node)
{
var terrainData = _terrain.terrainData;
var terrainSize = terrainData.size;
var heightmapResolution = terrainData.heightmapResolution;
return(new Vector3(
node.GetX() * terrainSize.x / heightmapResolution,
node.height * terrainSize.y,
node.GetY() * terrainSize.z / heightmapResolution
));
}
private bool IsNeighbour(HeightMapNode a, HeightMapNode b)
{
return(Mathf.Abs(a.GetX() - b.GetX()) <= 1 && Mathf.Abs(a.GetY() - b.GetY()) <= 1); //X and Y are always positive
}