Allows the ROI of the current data to be viewed as a 3-d surface, together with colour. The view angle may controlled by the user.
Users should not try to view large numbers of pixels with many colours as this can require very large amounts of system memory. Users are recommended to use REGION to restrict the viewing region and REBIN to further reduce the number of pixels. COLOUR TABLE should be used to reduce the number of colour indices by setting MINIMUM INDEX and MAXIMUM INDEX to use a limited range of colour indices. (System memory requirements will be roughly proportional to the number of pixels multiplied by the number of colour indices.)
Based on the starting view position the surface is calculated and drawn from back to front. This means that no hidden surface removal is necessary, yet the surface will appear correctly. Graphical menu ``buttons'' allow the user to change the angle and zoom in and out. However, it is possible to change the viewing angle such that it is outside the range for which the back to front drawing method is correct.
To obtain hard-copy is it necessary to click on the PRINT ``button'' within the menu and specify a file name.
Note: This command is still under development.