8. Topology Walk Algorithm

Priority-Based Face Selection

When walking from one face to the next, the algorithm uses priority selection:

1. Priority 1: Matching Wall - Face with NormX matching walk direction
2. Priority 2: Fillet/Arc - Face with entity class 4002 (cylindrical)
3. Priority 3: Any Unvisited - Any adjacent face not yet visited

Walk Termination Conditions

• Thickness Face - Reaches blade front/back (NormY > 0.7)
• Top Area (when i_includeTop=FALSE) - Reaches fillet/floor above midZ
• No Unvisited Neighbors - All adjacent faces already visited
• Wrong Extent (single-sided modes) - Reaches opposite side of blade

Face Classification Logic

'*** Face Classification by Normal Direction
if abs( w_faceNormX ) > 0.7 then
   '*** Wall face (left or right facing)
   if w_faceNormX < -0.7 then
      '*** Left-facing wall
   else
      '*** Right-facing wall
   end if
else if w_faceNormZ < -0.7 then
   '*** Downward-facing = Floor or Top surface
   if w_faceZ < w_midZ then
      '*** Interior floor
   else
      '*** Top face
   end if
else if w_faceNormZ > 0.7 then
   '*** Upward-facing = Base face
else if abs( w_faceNormY ) > 0.7 then
   '*** Thickness face (front/back of blade)
end if