Graphics show dark when roatating molecular structure

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Profile Greg_BE
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Message 44206 - Posted: 25 Jul 2007, 16:34:47 UTC
Last modified: 25 Jul 2007, 16:35:56 UTC

when you have the molecular version of the graphics on screen in BOINC 5.10.x and you rotate it to look at the "backside" it goes more and more dark the more you rotate it. Why is this? Does the artificial "light" not reach the backside or something? Just curios.
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Message 44207 - Posted: 25 Jul 2007, 16:47:26 UTC

Great minds think alike! I had the same question. Basically yes you are looking at the "dark side". I suggested they keep the orientation of the virtual sun fixed so that it is always the same in all the boxes.

See my post over on Ralph.
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Message 44213 - Posted: 25 Jul 2007, 18:39:03 UTC - in response to Message 44207.  

Great minds think alike! I had the same question. Basically yes you are looking at the "dark side". I suggested they keep the orientation of the virtual sun fixed so that it is always the same in all the boxes.

See my post over on Ralph.


interesting post, just one thing though, if there is a virtual sun in the upper right from the viewers stand point, when you rotate the protein towards you shouldn't it become lit by the "sun"?

i noticed the same thing with the jumping sequence when in ball mode, it goes to the upper left in both the search box and the accepted box, but settles down when it goes into refine mode.
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Message 44215 - Posted: 25 Jul 2007, 19:07:58 UTC

I suggested they keep the orientation of the virtual sun fixed so that it is always the same in all the boxes.

I agree.

What about showing this light source in the other display modes too? It would probably slow down the graphics a bit, but I think it would look really nice.
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Message 44227 - Posted: 25 Jul 2007, 20:31:58 UTC

I guess what I was trying to say was that initially the graphic shows the light source to the viewer's upper right. And rotating the protein essentially orbits the user around to the backside where everything is shaded. The suggestion is just to rotate the protein chain under the fixed light source rather then orbiting the viewer's orientation in one box, while still having the initial orientation in the others.
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Message 44235 - Posted: 25 Jul 2007, 21:31:16 UTC

ok, but what i don't get is this: if you rotate the protein you are rotating the structure and not the light source. If you were to leave the protein fixed and then change your view to rotate around the protein then you would see the dark side when you rotate your view around to the back of the fixed protein. but you are not doing that, you are rotating the protein around to the light source, so you should not have any dark areas as there is light to show them.
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Message 44240 - Posted: 25 Jul 2007, 21:44:14 UTC - in response to Message 44235.  

...then you would see the dark side... but you are not doing that... you should not have any dark areas as there is light to show them.


...yet we DO see dark areas! So how do you conclude we're NOT doing that?

I think we're all along the same lines of thinking here. There should not be dark areas. I was just trying to describe it. It is as though the sun is bolted to the protein and when I rotate the protein, the sun rotates with it. But if instead the sun is considered fixed, over the viewer's right shoulder, then the light will always be cast at the same angle, regardless of how the protein is rotated. And further, it will be easier to compare to the images in the other boxes because they will all be illuminated in the same way.
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Message 44259 - Posted: 25 Jul 2007, 23:39:53 UTC - in response to Message 44240.  

...then you would see the dark side... but you are not doing that... you should not have any dark areas as there is light to show them.


...yet we DO see dark areas! So how do you conclude we're NOT doing that?

I think we're all along the same lines of thinking here. There should not be dark areas. I was just trying to describe it. It is as though the sun is bolted to the protein and when I rotate the protein, the sun rotates with it. But if instead the sun is considered fixed, over the viewer's right shoulder, then the light will always be cast at the same angle, regardless of how the protein is rotated. And further, it will be easier to compare to the images in the other boxes because they will all be illuminated in the same way.


well ok, dark areas as in shadows, but total to near darkness doesn't seem quite right if you rotate the protein to the light source.
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Message boards : Rosetta@home Science : Graphics show dark when roatating molecular structure



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