[X3D-Public] Can I create a colored shape without any light effects?

[Tomas Mikula]

John, thank you for a quick reply.

I have upgraded to FreeWRL 1.22.4, but all the described problems
remain. This is how your example renders on my computer, after
rotating a bit:
http://www.freeimagehosting.net/uploads/a92b9f21d9.png

Tomas

On Tue, Aug 4, 2009 at 5:03 AM, John A. Stewart<astewart at crc.ca> wrote:
> Tomas;
>
> I have slightly modified your file, and have put it here:
>
> http://freewrl.sourceforge.net/tomasMikulaExample.x3dv
>
> (my mail reader has trouble with cutting and pasting many lines, so I put it
> up on the server)
>
>
>> Problem 1: The light source is rotating with the scene, so if I use my
>> mouse to rotate the scene 90 degrees up, I see caps, if I rotate by
>> 180 degrees, I see nothing.
>
> This should be ok now.
>
>
>>
>> Problem 2: I don't notice any change if I delete these two lines:
>> DEF MYPROX ProximitySensor {size 100 100 100}
>> ROUTE MYPROX.position_changed TO MYLIGHT.set_translation
>
> This should be ok now.
>
>
>> Problem 3: The decreased alpha "sometimes" renders as black instead of
>> transparent. I observed that this "sometimes" depends on the order in
>> which the spheres are defined in the x3dv file. ...
>> correctly. Is this a bug in FreeWRL? I use FreeWRL 1.22.3 under Linux.
>
> Yes, this bug was fixed in 1.22.4 of FreeWRL, which has been released for
> most platforms. Your observations are correct - good debugging work!
>
> Note the changed fragment shader; if the fragment is 100% transparent, it
> calls "discard" rather than drawing the fragment.
>
> This little example uses Spheres, you might want your boxes; play around
> with it. As I'm sure you understand, it only draws the fragments that "kind
> of" face the user; that simple algorithm can be tweaked to make it fit your
> requirements better.
>
> JohnS.
>
>
>
>
>
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