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Creating a virtual projector / barcode scanner style laser

October 16, 2011 | 4:00 pm

Hi there.

I’m looking at lighting 3d scenes with virtual lights. I’ve had a look at the new jit.gl.light object in Max 6 but I cant see a way of changing the shape of the spotlight so its long and thin, like a barcode scanner style light. Any pointers?

Also how would I go about projecting a matrix out like a light source? any Ideas of where I should look?

Thanks in advance

Chris G


October 16, 2011 | 9:03 pm

Right.

@tex_map 3 seems to be a good starting place along with tex_plane_s and tex_plane_t but it appears that this is "relative to OpenGL’s eye coordinates".

I’m after a free moving texture mapper similar to the jit.gl.light object.

I’ll keep looking…


October 16, 2011 | 9:28 pm

I’m looking for something similar for an advanced projection mapping project.



t
January 29, 2012 | 4:47 pm

quote: "I’ve had a look at the new jit.gl.light object in Max 6 but I cant see a way of changing the shape of the spotlight so its long and thin, like a barcode scanner style light."

This is exactly what I am looking for also. Is there any way to shape the spotlight?

Is there any easy way to create a shadow? Shadow as a consequence of light going through a long and thin window/slot?

I know that "barcode scanner style light" can be faked by drawing a line in jit.lcd and using the output as a texture. But my problem is that I am stretching the openGL object to such an extend, that one pixel increment looks as a big step. So the movement of "light" is not continuous. I could solve that with large texture matrix and large jit.lcd, but my CPU does not agree with that.

Help pretty please


December 14, 2012 | 3:56 am

I want my Data Matrix barcode to be mapped out like light source..


September 9, 2013 | 1:36 am

hello, why don’t you try this one to help you create a barcode scanner style laser?
in my view, it is helpful, hope you like it,


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