June 28, 2007: Trash shadow

[Happy Monkey]

Originally Posted by xoxoxoBruce

Then you are as fucked up as he is. You can't project on a cross section. Duh

That's a pretty obtuse way to interpret it. You project on the surface, and the [plane, cross section, 2D projection, whatever you want to call it] is "what the pattern looks like from that angle". Like if you look at a cube from on angle, it's a square. From another, it's a rectangle. From another, it's a hexagon. If you project a pattern onto that cube, and move around it, the 2D projection of that pattern that you see will change shape. And if it's a more complicated shape than a cube, you can get more complicated patterns.

"Projected image is not shadows, it's an image.

A projected image is a shadow. A shadow is a projected image. The shadow of a colored translucent film can be more interesting than the shadow of an opaque object, but it's all the same in this context.

1st diagram ~ In order to get the shadow of profile A alone, profile B has to be smaller. If Profile B is smaller, then you can't see it from "viewer".

Profile B is "what the viewer sees when looking at the object from the indicated position". If the object is visible, then the viewer can see Profile B. Whether it's bigger or smaller than Profile A is irrelevant.

This all seems to be based on some misunderstanding you have of Flint's terminology and diagram conventions. It all works.