bool InitializeBrushMeshInstances()
{
var instances = brushMeshAsset ? brushMeshAsset.Instances : null;
// TODO: figure out why this can happen (mess around with spiral stairs)
// TODO: does this have anything to do with spiral stairs not updating all submeshes when being modified?
if (instances != null &&
instances.Length !=
brushMeshAsset.SubMeshCount)
{
brushMeshAsset.UpdateInstances();
instances = brushMeshAsset ? brushMeshAsset.Instances : null;
}
var requiredNodeLength = RequiredNodeLength(instances);
if (Nodes != null && Nodes.Length == requiredNodeLength)
{
if (Nodes.Length == 0)
{
var brush = (CSGTreeBrush)Nodes[0];
brush.BrushMesh = BrushMeshInstance.InvalidInstance;
brush.Operation = CSGOperationType.Additive;
}
else
if (Nodes.Length == 1)
{
var brush = (CSGTreeBrush)TopNode;
brush.BrushMesh = brushMeshAsset.Instances[0];
brush.Operation = brushMeshAsset.SubMeshes[0].Operation;
}
else
{
for (int i = 0; i < instances.Length; i++)
{
var brush = (CSGTreeBrush)Nodes[i + 1];
brush.BrushMesh = brushMeshAsset.Instances[i];
brush.Operation = brushMeshAsset.SubMeshes[i].Operation;
}
}
return(true);
}
else
{
bool needRebuild = Nodes != null && Nodes.Length != requiredNodeLength;
if (Nodes.Length <= 1)
{
var brush = (CSGTreeBrush)TopNode;
if (brush.BrushMesh != BrushMeshInstance.InvalidInstance)
{
brush.BrushMesh = BrushMeshInstance.InvalidInstance;
brush.Operation = CSGOperationType.Additive;
}
}
else
{
for (int i = 1; i < Nodes.Length; i++)
{
var brush = (CSGTreeBrush)Nodes[i];
if (brush.BrushMesh != BrushMeshInstance.InvalidInstance)
{
brush.BrushMesh = BrushMeshInstance.InvalidInstance;
brush.Operation = CSGOperationType.Additive;
}
}
}
if (needRebuild) // if we don't do this, we'll end up creating nodes infinitely, when the node can't make a valid brushMesh
{
CSGNodeHierarchyManager.RebuildTreeNodes(this);
}
return(false);
}
}
