LoadAnimMesh,EntityPickMode and TerraEd

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martonic

Hi!

When using EntityPickMode=2, CameraPick and LinePick may not return the same handle that was returned by LoadAnimMesh. Instead, you may get the handle of a child of the object, and a direct comparison (of the value returned by LoadAnimMesh, to the value returned by CameraPick) will fail. This is not an issue with LoadMesh, since parent/child info does not get loaded by that method.

This issue (with EntityPickMode=2) comes up in TerraEd, because TerraEd calls LoadAnimMesh for everything.

Here is a solution to the problem.

;Typical use of CameraPick to select an object
MyPickEntity = CameraPick(Cam, GraphicsWidth()/2, GraphicsHeight()/2)
If MyPickEntity <> 0 Then
     For G.Game_Object=Each Game_Object
          If PickTest(G\Entity, MyPickEntity) Then
               ; Do Something
          Endif
     Next
Endif

;Function that makes it work
Function PickTest(TestEntity%, PickEntity%)
     If TestEntity = PickEntity Return True
	
     Children%=CountChildren(TestEntity)
	
     For n = 1 To Children%
          Test%=GetChild(TestEntity,n)
          EndSearch = PickTest(Test,PickEntity)
          If EndSearch Return True	
     Next
	
     Return False
End Function

Feel free to use the above code as needed.

Important: TerraEd has a function to get an object's Entity Handle: Ter_FindTerraObject(Name$). However, to use that function, A) the object must have "Culling" Reset, and (B) you must _first_ call Ter_UpdateTerra(Cam) - once for all objects - which sets the Entity Handles for all non-culled objects in the TerraEd map.

Regards,

Martonic