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Description
Sleeping on it is usually a good idea. I decided to skip the algebra/geometry calculation and let the video card do it for me. So I'm using a mesh-- a whole mesh-- to limit the fog. Which is cool, because I can use any convex mesh to mask it. (It's possible to do with concavity as well, but more complicated than it's worth, and maybe a little beyond my current abilities.)

Here, the fog is being masked by a big cylinder. You can kind of see the shape of the cylinder. I still have some bugs to work out however. Like how to get it drawing correctly when the back of the fog mask object is behind the camera.

Other plans: going to skip the physics. I've been trying to implement physics with single frame sampling of physics-- no memory of what happened last frame-- and it just never looks good. The problem with physics is that to get anything good, you have to remember things like velocities. To remember things, you basically need to write a texture every frame. It's kind of complicated.

Description
Sleeping on it is usually a good idea. I decided to skip the algebra/geometry calculation and let the video card do it for me. So I'm using a mesh-- a whole mesh-- to limit the fog. Which is cool, because I can use any convex mesh to mask it. (It's possible to do with concavity as well, but more complicated than it's worth, and maybe a little beyond my current abilities.)

Here, the fog is being masked by a big cylinder. You can kind of see the shape of the cylinder. I still have some bugs to work out however. Like how to get it drawing correctly when the back of the fog mask object is behind the camera.

Other plans: going to skip the physics. I've been trying to implement physics with single frame sampling of physics-- no memory of what happened last frame-- and it just never looks good. The problem with physics is that to get anything good, you have to remember things like velocities. To remember things, you basically need to write a texture every frame. It's kind of complicated.