tom w

I am trying out a new technique for me: projecting textures onto jit.gl.model objects. Although I'm planning to use this for lots of different effects, an example of the effect is to be able to do 'projection mapping' inside the openGL window using an .obj of a building and a 'virtual' projector.

I have come across the 'texgen' projected attribute of jit.gl.texture, which seems to work, but what I can't work out is how to alter the parameters of the virtual 'projector' - i.e. where it is in space, lens angle, aspect ratio etc. I'm sure I'm missing something obvious, can anybody help me?

I am trying out a new technique for me: projecting textures onto jit.gl.model objects. Although I'm planning to use this for lots of different effects, an example of the effect is to be able to do 'projection mapping' inside the openGL window using an .obj of a building and a 'virtual' projector. 

texgen-projected

I have discovered that adding a jit.gl.light to the scene seems to allow you to use the light position, rotation and scale properties to control the projected texture. This should do what I need for now - seems like a slightly odd work-around though!

If anybody has any insight into how better to control this setup, I'd be very grateful.

Your virtual projector is jit.gl.camera. Has all the attributes you need plus a lens attribute.

Texgen 'projected'