Sam Tarakajian

I was wondering if someone could offer some advice on how to render the intersection between a 3D-polygon (possibly concave) and a plane. That is to say, I want to draw the area of the plane that is inside the polygon in a different color from the area outside.

3d-shape-capping

probably easiest way to do this is with textures.

you can capture the shape to a texture, and use that with something like jit.gl.pix, to determine which color to paint the plane.

hey sam.
probably easiest way to do this is with textures.

you can capture the shape to a texture, and use that with something like jit.gl.pix, to determine which color to paint the plane.


if you want to go the geometry route, distance functions might allow you to perform boolean operations.

https://cycling74.com/forums/boolean-effect-in-jitter

if you want to go the geometry route, distance functions might allow you to perform boolean operations.
check out my reply here: https://cycling74.com/forums/boolean-effect-in-jitter


So unfortunately while what you sent me is pretty cool, it's not quite what I'm looking for. I was really hoping for something more like a cross section than simply projecting the object down onto a surface.

This thread seems to describe pretty well what I want to do, along with what looks like a solution. 

http://www.opengl.org/discussion_boards/showthread.php/169569-cap-clipped-complex-geometry

The only downside is that it involves a lot of openGL wizardry that I don't really know how to approach in Max.

This thread seems to describe pretty well what I want to do, along with what looks like a solution. http://www.opengl.org/discussion_boards/showthread.php/169569-cap-clipped-complex-geometry

i will have to defer to andrew b or wes for this one.

ah, yes. significantly more complicated.
i will have to defer to andrew b or wes for this one.
sorry sam!


Did you (or anyone else) get anywhere with this? Very curious to hear what you learned.

3D shape capping