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Isocontouring widget

Describes the histogram and how to display an isocontour.


This tutorial introduces 3D Grid/Volume Rendering widget and explains how to use it.
Page 2 of 4.
When user clicks on Isocontour button, a histogram for the currently selected grids is plotted, showing the distribution of the scalar field defined on the gird. The X-axis of the histogram goes from the minimum to the maximum of the scalar field and the Y-axis shows the frequency (i.e., the number of counts for each bin). Shift-click inside the widget to add isocontour. This should create isocontour corresponding to the isovalue on the X-axis. Move the bar to change the isovalue. Right-click on the bar to open a menu shown on the right. This menu lets you change the properties of selected isocontour such as the isovalue, color and transparency. You can also delete or show/hide selected isocontour. Set 3D Surface Properties option opens DejaVu GUI where you can make the surface wireframe (click on Front and select line under Material properties), among many other things. Note that you can add as many surfaces as needed and they all be saved when you use FileSave Settings menu.

by Sargis Dallakyan last modified 2007-02-17 08:55 Molecular Graphics Laboratory, TSRI

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