The centre of the child meshes, could in fact be the centre of the parent mesh. You may have to move the centre of the mesh, using the fitmesh command. Best thing to do if that's the case is:
Find the centre of the child mesh, using vertex co-ords commands. I have put together these functions for doing this.
Use them like this:
centre_x = find_centre_x(mesh)
centre_y = find_centre_y(mesh)
centre_z = find_centre_z(mesh)
These are the functions you will need.
Function find_lowest_vertex#(mesh)
lowest# = 999999.0
no_surfaces = CountSurfaces(mesh)
For sloop = 1 To no_surfaces
Surface_Handle = GetSurface(mesh, sloop)
For loop = 0 To CountVertices(surface_handle)-1
TFormPoint VertexX(surface_handle,loop),VertexY(surface_handle,loop),VertexZ(surface_handle,loop),mesh,0
If TFormedY#() < lowest Then
lowest = TFormedY#()
End If
Next
Next
Return lowest
End Function
Function find_highest_vertex#(mesh)
highest# = -999999.0
no_surfaces = CountSurfaces(mesh)
For sloop = 1 To no_surfaces
Surface_Handle = GetSurface(mesh, sloop)
For loop = 0 To CountVertices(surface_handle)-1
TFormPoint VertexX(surface_handle,loop),VertexY(surface_handle,loop),VertexZ(surface_handle,loop),mesh,0
If TFormedY#() > highest Then
highest = TFormedY#()
End If
Next
Next
Return highest
End Function
Function find_leftmost_vertex#(mesh)
leftmost# = 999999.0
no_surfaces = CountSurfaces(mesh)
For sloop = 1 To no_surfaces
Surface_Handle = GetSurface(mesh, sloop)
For loop = 0 To CountVertices(surface_handle)-1
TFormPoint VertexX(surface_handle,loop),VertexY(surface_handle,loop),VertexZ(surface_handle,loop),mesh,0
If TFormedX#() < leftmost Then
leftmost = TFormedX#()
End If
Next
Next
Return leftmost
End Function
Function find_rightmost_vertex#(mesh)
rightmost# = -999999.0
no_surfaces = CountSurfaces(mesh)
For sloop = 1 To no_surfaces
Surface_Handle = GetSurface(mesh, sloop)
For loop = 0 To CountVertices(surface_handle)-1
TFormPoint VertexX(surface_handle,loop),VertexY(surface_handle,loop),VertexZ(surface_handle,loop),mesh,0
If TFormedX#() > rightmost Then
rightmost = TFormedX#()
End If
Next
Next
Return rightmost
End Function
Function find_zmost_vertex#(mesh) ; the furthest away on the Z axis
zmost# = -999999.0
no_surfaces = CountSurfaces(mesh)
For sloop = 1 To no_surfaces
Surface_Handle = GetSurface(mesh, sloop)
For loop = 0 To CountVertices(surface_handle)-1
TFormPoint VertexX(surface_handle,loop),VertexY(surface_handle,loop),VertexZ(surface_handle,loop),mesh,0
If TFormedZ#() > zmost Then
zmost = TFormedZ#()
End If
Next
Next
Return zmost
End Function
Function find_zleast_vertex#(mesh) ; the closest on the Z axis
zleast# = 999999.0
no_surfaces = CountSurfaces(mesh)
For sloop = 1 To no_surfaces
Surface_Handle = GetSurface(mesh, sloop)
For loop = 0 To CountVertices(surface_handle)-1
TFormPoint VertexX(surface_handle,loop),VertexY(surface_handle,loop),VertexZ(surface_handle,loop),mesh,0
If TFormedZ#() < zleast Then
zleast = TFormedZ#()
End If
Next
Next
Return zleast
End Function
Function find_centre_y#(entity)
hv# = find_highest_vertex#(entity)
lv# = find_lowest_vertex#(entity)
centre_y# = lv + ((hv - lv)/2)
Return centre_y
End Function
Function find_centre_x#(entity)
rm# = find_rightmost_vertex#(entity)
lm# = find_leftmost_vertex#(entity)
centre_x# = lm + ((rm-lm)/2)
DebugLog(" mesh width = "+ (rm-lm))
Return centre_x
End Function
Function find_centre_z#(entity)
zm# = find_zmost_vertex#(entity)
zl# = find_zleast_vertex#(entity)
centre_z# = zl + ((zm - zl)/2)
Return centre_z
End Function
NOW, you need to fitmesh around (0,0,0) by doing:
FitMesh mesh,-MeshWidth(mesh)/2,-MeshHeight(mesh)/2,-MeshDepth(mesh)/2,MeshWidth(mesh),MeshHeight(mesh),MeshDepth(mesh)
Then, you place the mesh back at it's centre point, using the centre co-ords you obtained earlier.
PositionEntity mesh,centre_x,centre_y,centre_z,TRUE
That should centre the mesh around 0,0,0 mesh axis, and move the entity to it's previous co-ords. The entity shouldn't actually position though. Hope that helps :o)
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