Overwatch
Yosemite Valley as a recon display. The GPU works out, from wherever the cursor rests, which ground is in sight: a line-of-sight test on every point of a million-cell terrain, redone each time the mast moves. Coverage floods over ridges and drains out of side canyons as you move. Click to pin up to four masts.
terrain, 3D, WebGL, analysis, Mapterhorn