Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Hi Raymond, Determining visibility of points in a terrain plot is a bit tricky, and I don't think picking logic will help much. You could use the Java3D Transform to transform the data coordinates of your points into 3-D (x, y, z) screen coordiantes, then for each point see if there is a point at the same approximate x with smaller z (i.e., closer) and larger y (i.e., higher and thus obscuring). The x test has to be approximate since your points won't fall on neat rows and columns once transformed into 3-D screen coords. Note that a point might also be technically visible (from underneath the terrain surface) if all the points in front of it in z have larger y. Good luck, Bill ---------------------------------------------------------- Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706 hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738 http://www.ssec.wisc.edu/~billh/vis.html
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