Applet: Level surface of a function of three variables
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A level surface $f(x,y,z) = 10 e^{-9x^2-4y^2-z^2}=c$ is shown. You can drag the blue point on the slider with the mouse to change $c$, and hence the level surface being displayed.
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General information about three.js applets
The applet was made using three.js and requires Javascript as well as a browser that supports WebGL. For most three.js applets, you can drag with the mouse to rotate the view, drag with the right button to pan, and zoom in/out with the mouse wheel. Many applets contain points that you can drag to change values of variables.