Create a relief surface or mesh by spinning a contour around a selected axis.
Parameters
When the spin command is activated, the Relief Dialogue will activate with additional spin parameters.
Spin Angles
Define the Start Angle and End Angle for the resulting relief or mesh. A complete revolution is 360 degrees and would have a Start Angle of 0 and an End Angle of 360.
A half revolution would use a Start Angle of 0 and an End Angle of 180.
The image shows a mesh object created with a Start Angle of 45 degrees and an End Angle of 135 degrees.
The Start Angle and End Angle can also be changed interactively by clicking and dragging the circle used to define the center of the spin as shown in the above image.
Height Control Curve
Define a contour used to vary the height of the relief as it is spun. This is an optional step in the spin wizard that allows for more complex surfaces to be created. The relief on the left was created with a Height Control Curve. The relief on the right was created using the same profile without the Height Control Curve.
Below are the contours used to create the surface above. The Height Control Curve is the top curve in green. The straight line shown below it is the influence line, which is automatically drawn after the Height Control Curve is selected. Click and drag the influence line to control how much influence the Height Control Curve will have on the spun surface. Dragging the influence line away from the Height Control Curve will decrease the effect it has on the spun surface.
Width Control Curve
The optional Width Control Curve modifies the spun surface the same way as the Height Control Curve, except it modifies the width of the spun surface instead of the height. The relief on the left was created using a Width Control Curve and the relief on the right was created without it.
The optional Height and Width control curves can be used separately or together to create surfaces. The surfaces pictured below were all created with the same profile, but with different options applied.
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| Both Height and Width Control | Only Width Control | Only Height Control | Only the Profile |