Hit Samples… button and choose ContoursAndCaption.net and open it.

This program shows a Caption and a set of contour lines based on data in the object that is being visualized.

It's the same water molecule data we saw in AutoColor.net.

This time, you see more "gizmos" on the Control Panel. One is a Selector menu that you can pull down and make a choice from. The other is a ScalarList module into which you can enter a list of scalar data values and add or delete values at any time. If you choose "uniformly spaced from min to max" from the Selector menu, you may be underwhelmed since for this particular slice through the data, all the contour lines are blue and crowded together at the corners of the slice.

Selector menu item wording is created by the programmer who builds the DX net (you, for example). We'll see how to do this later.

How do we change the position of the slice (here, generated with a MapToPlane module)? In this program, the programmer connected the MapToPlane module's position parameter to the Sequencer. The Sequencer is a tool for making quick and simple animations and looks like the controls of a VCR. You see these controls in the small window called "Sequence Control". Go ahead and hit the Play (">") button and watch the results. To see the sequence again, hit Play, or first hit the Loop button (circular arrow in top left), then Play. Note that the second and succeeding times through the loop, DX plays the images faster, because DX caches in memory all previously solved values and images, up to certain internal limits. This speeds up the interaction with the human user since you don't have to wait each time for everything to be recalculated from scratch.

Hit the square Stop button to stop the sequence.

Optional: View this Technical Aside if you want more detail on this subject; the information is not required to understand the upcoming material.

Quit this program.