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Index › Programming Questions & Help › OpenGL and 3D Libraries › mapping video on 3D mesh
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mapping video on 3D mesh (Read 990 times)
smallfly
mapping video on 3D mesh
May 15th, 2006, 4:38pm  
Hi,

I'm trying to map video on 3D mesh.
With P3D the video texture mapping work, but with OPENGL the mesh is mapped with black. Is there something that should be change to make it work with OPENGL ?

The code is from a previous post by mark_h - http://processing.org/discourse/yabb_beta/YaBB.cgi?board=Contribution_3DOpenGL;action=display;num=1136327599)

I can not post the code, it's too long.
So the code is the same as the one posted by mark_h, I just changed:

size(1024,768, P3D);
for
size(1024,768, OPENGL);

added

Capture cam;
PImage texmap;

void captureEvent(Capture cam)
{
 cam.read();
 texmap.copy(cam, 0, 0, cam.width, cam.height, 0, 0, texmap.width, texmap.height);
}


thanks,
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flight404
Re: mapping video on 3D mesh
Reply #1 - May 15th, 2006, 8:09pm  
I was able to get it to work.  Lets see...

For one, if you make the cam the same size as the texmap, you can use arraycopy to get a faster duplicate.  So the code would be:

Code:

if (cam.available()){
  cam.read();
  arraycopy(cam.pixels, texmap.pixels);
  texmap.updatePixels();
}


I guess there is no 'for two'.  Give it a shot and see if that helps.

-robert
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Robert Hodgin {flight404}&&
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smallfly
Re: mapping video on 3D mesh
Reply #2 - May 15th, 2006, 8:42pm  
it works !!!

so I was missing the texmap.updatePixels();
and thanks for the advice about arraycopy.

btw, I have mini DV tape to watch, my friend recorded your talk at FITC when I was next door attending to Occulart's talk.

//hugues
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