That Darn Shadow Plotting

Note that this version is natural light, unlike the one we tried in class, which was local. (That not-insignificant distinction was lost to my shite memory.) The placement of the SVP and, straight below it, the STP are both dictated by the direction and length of the shadow of the post. Note that the rightward direction of the cast shadows of 1, 2, and 3 seems to contradict the direction of the shadow of the post! Completely counter-intuitive. Perhaps it is possible to know too much...

Click on it to see it animate. You may have to watch it a few times to grasp it.

JH