To create an isophote curve on a surface, proceed as follows. First of all load file "GSMH.e3".
The Isophotes option of the
Light Contour Curve command enables you to create isophote curves, which is curves along which illumination is constant. Isophotes can be temporarily drawn on a surface in order to get a simplified representation of it and estimate its shape. If isophotes "look good" the shape of the surface can be considered acceptable, otherwise you may want to change it.
To create an isophote curve on a surface, proceed as follows. First of all load file "GSMH.e3".
| 1 | Start the command and select Isophotes in the
Type drop-down list. |
| 2 | Select the surfaces you want to create the isophote curves on. |
| 3 | Select the Interactive direction check box. The 3D-handle is displayed. |
| 4 | In the Direction drop-down list you can select the direction to be used to define the isophotes (see "
How to define an axis or a line" for details). To go on with this task, set the direction to
Z. |
| 5 | Click on the handle in between axes X and Y in the handle. The Angle mini-dialog box shows up. Set the value to -35 and select the preview button (  ) so as to display a preview of the silhouette curves you can obtain with the current settings, |
| 6 | Click  or  to confirm your selections and create the Isophote curve. |