3D painting

Alessandro · 2012-07-11T14:55:47

I'd like to have the possibility to 3D-paint an object texture using the mouse as a brush. I've tried ray-casting mouse click, getting the triangles inside the brush area, calculate barycentric coordinates for each point intersection, set the colors on the uv corresponding values, saving and reloading the texture. Too slow. I'd like to have a glsl solution for this. I've google around but couldn't find much. If someone would be so kind to develop a small application that paints a sphere, or a cube, using a glsl approach I'd like to pay for it (I use Paypal). Looking forward to any possible help, thanks.

Graphics and GPU Programming Programming

Started by Alessandro June 23, 2012 01:22 PM

21 comments, last by Alessandro 11 years, 9 months ago

Alessandro

306

Author

July 11, 2012 02:27 PM

The you just need to find a way to calculate the size of the brush (and shape) in UV space.

That is actually the major difficulty I'm facing, since UV space is not proportional to model polygons.

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dpadam450

2,403

July 11, 2012 02:49 PM

Shaders would have made this a lot easier but the overhead for you to learn getting shaders up and understanding the method to do it would be quite a bit. Would be a very similar approach but much faster.

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Alessandro

306

Author

July 11, 2012 02:55 PM

I'm aware of that. I really need to build such feature in my application, so should you ever be interested in writing a small application that does this duty, remember that I'd like to pay for it.

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3D painting

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3D painting

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