Scaling to projected volume

This option resizes surfaces and solids according to their volume as projected on to the active workplane. Closed surfaces scale as you would expect because there is no ambiguity about the volume. However, the volume of open surfaces is ambiguous and can cause unexpected results. For example, the volume of a sphere which has a non-circular curved shape cut from it cannot be defined unless you apply some rules.

To avoid ambiguity PowerShape projects the surface on to the current active plane and then runs the volume calculations. The scale volume algorithm is explained in the next section.

To scale to projected volume:

1. Select a surface.
2. Click Edit tab > Transform panel > Scale.

   The Scale toolbar and the scale origin marker are displayed.

3. Move the scale origin as required.
4. To keep the original object, click .
5. Select Projected volume from the drop-down list on the toolbar. The current projected volume value is displayed.
6. Select the required volume or enter a new value in the drop-down list.

   The surface and solid is scaled when you press Enter. Primitive surfaces are converted to power surfaces and primitive solids to general ones.

7. To lock the scaling factor of any axis to 1, click on the appropriate lock button.
8. Click Apply to accept the changes or Cancel .