private BoundingPatch[,] Combine2X2Patches(Patch[,] patchesInput)
{
var newRows = (patchesInput.GetLength(0) + 1) / 2;
var newCols = (patchesInput.GetLength(1) + 1) / 2;
var patchesOutput = new BoundingPatch[newRows, newCols];
for (var y = 0; y < newRows; y++)
{
for (var x = 0; x < newCols; x++)
{
var hierarchicalPatch = new BoundingPatch(Ctx);
for (var k = 0; k <= 1; k++)
{
for (var j = 0; j <= 1; j++)
{
var row = 2 * y + k;
var col = 2 * x + j;
if (row < patchesInput.GetLength(0) && col < patchesInput.GetLength(1))
{
hierarchicalPatch.AddChild(patchesInput[row, col]);
}
else
{
hierarchicalPatch.AddChild(null);
}
}
}
patchesOutput[y, x] = hierarchicalPatch;
}
}
return(patchesOutput);
}
private void CreatePatchHierarchy()
{
var patchHierarchy = Combine2X2Patches(_grassPatches);
while (patchHierarchy.Length > 1)
{
patchHierarchy = Combine2X2Patches(patchHierarchy);
}
_rootPatch = patchHierarchy[0, 0];
}
