Subtract Implicit Geometry

Carve out implicit bodies ("tools") from another implicit body ("target").

A new implicit body is created that envelopes any volume that falls within any target but not within any tools. It is equivalent to a logical NOT negation.
You will select two sets of implicit bodies, which must intersect.
  • The target is the body being carved.
  • The tools are the bodies doing the carving.

  1. On the Implicit Modeling ribbon, select the Subtract tool.

  2. Optional: For Visualization Quality, select from Low to Very High quality, which corresponds to a low to very high density of elements. A higher quality produces sharper geometry features but is more computationally intensive. When creating a complicated function, it’s recommended to work using a lower quality and then switch to a higher quality after the function is complete.
  3. Select one target body. If you wish to subtract a tool from multiple target bodies, the target bodies should be combined using the Combine tool beforehand.
  4. Select one or more tool bodies. All tool bodies will be automatically combined prior to subtracting them from the target body.
  5. In the guide panel, select a type of Transition:
    • Sharp
    • Fillet: If you selected this option, define the fillet Radius. The fillet radius can be entered directly, controlled using a variable or driven by a field (field-driven design)
    • Chamfer: If you selected this option, define the chamfer Distance. The setback of the chamfer can be entered directly, controlled using a variable or driven by a field (field-driven design).
  6. Click OK.