Scott Fitzgerald

I have a jit.gl.mesh object with fog turned on. When i move the context's camera, the fog appears to follow the camera, not stay in its position, attached to the mesh.

How can I get the fog to remain in an absolute position in the world?

I have a jit.gl.mesh object with fog turned on.  When i move the context's camera, the fog appears to follow the camera, not stay in its position, attached to the mesh.

how-does-fog-relate-to-the-camera

fog doesn't really have a position like other objects. it is relative to the distance from the objects to the viewer.

you could try mimicking the fog effect with some gridshape planes decreasing in transparency, which would have an absolute position. or perhaps a shader might be the way to go.

I would think a shader would be great at this, and even though I am still very much in the beginning of learning shader programming, I have learned about a few things that can be done with shaders and you can use things like z depth, so I woudl think you could use them relative to the object quite easily.. maybe wes nesa or andrew or some other shader pro can chime in? speaking of which.. what happened to vade? he seems to be totally invested in QC now.. we need to steal him back and get him to translate all the work hes been doing back to jitter!

I would think a shader would be great at this, and even though I am still very much in the beginning of learning shader programming, I have learned about a few things that can be done with shaders and you can use things like z depth, so I woudl think you could use them relative to the object quite easily.. maybe wes nesa or andrew or some other shader pro can chime in?  speaking of which.. what happened to vade?  he seems to be totally invested in QC now.. we need to steal him back and get him to translate all the work hes been doing back to jitter!


Oh yeah duh!!! Im doing an installation right now that does just this!!! and actually the fog that I am doing looks alot cooler.. here is my code for that part.. it uses jit.gl.volume to get a nice textured fog that can move through the room.

Since this is nothing more than a quick n dirty thing, I'll stick with the transparent gridshapes, and leave the shader fun for later (though I think that would ultimately be the way to go).

Thanks for the patch AC, not exactly what I'm looking for, but pretty cool.

Just curious, is this implementation unique to Jitter, or it how OpenGL deals with fog as well?

well if you want it to be streight gradient for distance you just have to change some settings around. blend mode and the bfg thats going into the volume to make it a streight gradient.. or actually you could just send it a matrix of all 1s

well if you want it to be streight gradient for distance you just have to change some settings around.  blend mode and the bfg thats going into the volume to make it a streight gradient.. or actually you could just send it a matrix of all 1s


did you find a solution for this? I think with using volume in some way you will get a good result but just curious if you found a better cpu solution.

did you find a solution for this?  I think with using volume in some way you will get a good result but just curious if you found a better cpu solution.


For this particular application, I gave up on using fog and just prepared my texture differently than I would have otherwise.

I still plan on looking at your patch more, when the time allows.

How does fog relate to the camera?