[builder] flatten layer fix

Author: stefanmaierhofer

RELEASE_NOTES.md

@@ -1,3 +1,6 @@
+### 0.5.5
+- [builder] flatten layer fix
+
 ### 0.5.4
 - [builder] builder now flattens multiple layer sets into one (at split limit tile size)
   - this fixes a previous sampling problem with layers having masks

src/Aardvark.Geometry.Quadtree/Layer.fs

@@ -519,17 +519,23 @@ module Layer =
                                     ()
                             else
                                 if v <> undefinedValue then
-                                    debugCollisionSamples.Add(i) |> ignore
+                                    //debugCollisionSamples.Add(i) |> ignore
                                     debugCountCollisions <- debugCountCollisions + 1
 
                                     //if verbose then
                                     //    printfn "[Layer.flattenTyped] COLLISION overwriting value %A from layer %d with value %A from layer %d" finalData[i] finalMask[i] v layerIndex
 
+                                    //printfn "[Layer.flattenTyped] .... overwrite sample %A; %A <- %A" c finalData[i] v
+
+                                    finalData[i] <- v
+                                    finalMask[i] <- layerIndex
+                                    
                                 else
                                     ()
 
 
-
+            
+            //printfn "[Layer.flattenTyped] .... overwrite sample count: %d" debugCountCollisions
 
             layerIndex <- layerIndex + 1uy