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  #1  
Old 07-22-2011, 09:40 AM
tjwjtj tjwjtj is offline
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Question possibility to set multiple projectors in Vizard 4.0?

Hi,

I have a 3d model loaded in Vizard 4.0. I want to project high-resolution texture images onto the 3D model in order to get more details of the surface.

Vizard 4.0 works fine with only one image projected onto the 3d model using camera yaw, pitch, roll value and camera positions. Is it possible to project multiple images onto the 3d model at the same time? and how to implement?

Thanks in advance!
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  #2  
Old 07-25-2011, 01:36 PM
bennett145 bennett145 is offline
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Mutliple Projectors

I have the same question. We would like to have several projectors running at once. Does anyone have any ideas?
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  #3  
Old 07-25-2011, 04:44 PM
TarkaDahl TarkaDahl is offline
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Hi

I take it you are doing something similar to the example here.

http://docs.worldviz.com/vizard/vizProjector.htm

In which case could you add something like this.

Code:
projectorTwo = projector.add(viz.add('BALL.JPG'))
projectorTwo.setEuler([0,90,0])

projectorTwo.affect(ground,textureNum=2)
projectorTwo.affect(ball,textureNum=2)

projectorTwo.ortho(0.25,0.15)

projectorTwo.setPosition([0,1,3])
projectorTwo.addAction( vizact.spin(0,0,1,90))
Is that what you want to do?

Thanks

TarkaDahl
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  #4  
Old 07-26-2011, 07:26 AM
bennett145 bennett145 is offline
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Prefect!

Thanks! This textureNum argument was what we were missing. Thanks for the help!
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  #5  
Old 07-27-2011, 02:53 PM
tjwjtj tjwjtj is offline
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Hi TarkaDahl,

Thanks for the help. Do you know if there is any limit in the number of texture maps to be projected. I have ~27 textures. It seems I can only project 7 each time. The rest of the textures have error of "before Glyph::subload(): detected OpenGL error: invalid operation" when loaded.
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  #6  
Old 07-28-2011, 11:04 AM
farshizzo farshizzo is offline
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There is a limit to how many textures you can apply to an object in OpenGL using the fixed-function pipeline. It looks like the limit is 8 in your drivers. If you need to use more, then you will have to write a custom fragment shader that computes the effect of all the projectors on each pixel.
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  #7  
Old 07-28-2011, 03:15 PM
tjwjtj tjwjtj is offline
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Hi farshizzo,
You are right. The limit is 8. Is there any sample code I can follow? Do you think it is worth to write a custom fragment shader for projecting all the 27 textures? Or maybe create a single combined texture model will make things easier? Thanks!
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