Home » Archived » GEF3D » Lighting
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| Re: Lighting [message #4280 is a reply to message #4067] |
Wed, 03 June 2009 00:45   |
 Miles Parker
Messages: 1341
Registered: July 2009 |
Senior Member |
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On 2009-06-02 16:20:01 -0700, Kristian Duske
<kristian.duske@fernuni-hagen.de> said:
> Hi Miles,
>
>> In my continuing exploration I'm trying to figure out how to get
>> lightening to work to add apparant depth to the solid cubes.. I've
>> found some gl examples such as..
>>
>> http://www.videotutorialsrock.com/opengl_tutorial/lighting/t ext.php
>>
>> But the glLightfv method doesn't appear to be part of Graphics3D. Is
>> thi possilbe to do right now?
>
> No, not right now. We haven't added any support for lighting whatsoever
> because we didn't see how it was neccessary for diagram editors, which
> is our main concern ;-).
Right, understood. Still, even with diagrams, you may have shapes such
as handles or complex solids that could benefit from a greater sense of
depth.
>
> If it's just a matter of adding methods to Graphics3D, I don't see why
> we couldn't do it though. Jens, what do you think?
>
> By the way: Miles, if I understand correctly what you're trying to do,
> you're not interested in editing support for your diagrams, right? This
> is only for visualization of agent systems?
That's quite true in general. However, I use GEF extensivly (as well as
Draw2D) because it does such a good job of managing the update of agent
hierarchies and it doesn't appear to have a heavy performance hit.
(Probably more memory than needed though.) I could imagine using
editing support at some point but that would be almost incidental. But
typically I'm wanting to update everything at once with as little
performance hit as possible, and (again, typically) the quickest option
would often be rerendering everything. In contrast to Draw2D my sense
is that all of the figures are rebuilt if they move anyway..
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| Re: Lighting [message #4562 is a reply to message #4067] |
Wed, 03 June 2009 09:32 |
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Hi all,
On 2009-06-03 01:20:01 +0200, Kristian Duske
<kristian.duske@fernuni-hagen.de> said:
> No, not right now. We haven't added any support for lighting whatsoever
> because we didn't see how it was neccessary for diagram editors, which
> is our main concern ;-).
>
> If it's just a matter of adding methods to Graphics3D, I don't see why
> we couldn't do it though. Jens, what do you think?
Of course we could add some methods for lighting support. :-) If there
is a volunteer who would like to add them ;-) Note that the Graphics3D
interface is implemented at least by two classes, one for LWJGL, the
other one for X3D!
Generally spoken, we have only implemented so far what we need and what
we think 95% of the users would probably need. If there are other
things, please add a bug report (enhancement request). In most cases,
we didn't implement things because we do not like them, but simply
because we didn't have the time.
One note on lights: While OpenGL supports lights, it doesn't support
shadows. So even if we add lights, maybe the effect won't be as
impressive as expected.
Cheers,
Jens
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| Re: Lighting [message #561912 is a reply to message #4067] |
Wed, 03 June 2009 00:45 |
Miles Parker
Messages: 1341
Registered: July 2009 |
Senior Member |
|
|
On 2009-06-02 16:20:01 -0700, Kristian Duske
<kristian.duske@fernuni-hagen.de> said:
> Hi Miles,
>
>> In my continuing exploration I'm trying to figure out how to get
>> lightening to work to add apparant depth to the solid cubes.. I've
>> found some gl examples such as..
>>
>> http://www.videotutorialsrock.com/opengl_tutorial/lighting/t ext.php
>>
>> But the glLightfv method doesn't appear to be part of Graphics3D. Is
>> thi possilbe to do right now?
>
> No, not right now. We haven't added any support for lighting whatsoever
> because we didn't see how it was neccessary for diagram editors, which
> is our main concern ;-).
Right, understood. Still, even with diagrams, you may have shapes such
as handles or complex solids that could benefit from a greater sense of
depth.
>
> If it's just a matter of adding methods to Graphics3D, I don't see why
> we couldn't do it though. Jens, what do you think?
>
> By the way: Miles, if I understand correctly what you're trying to do,
> you're not interested in editing support for your diagrams, right? This
> is only for visualization of agent systems?
That's quite true in general. However, I use GEF extensivly (as well as
Draw2D) because it does such a good job of managing the update of agent
hierarchies and it doesn't appear to have a heavy performance hit.
(Probably more memory than needed though.) I could imagine using
editing support at some point but that would be almost incidental. But
typically I'm wanting to update everything at once with as little
performance hit as possible, and (again, typically) the quickest option
would often be rerendering everything. In contrast to Draw2D my sense
is that all of the figures are rebuilt if they move anyway..
|
|
|
| Re: Lighting [message #561992 is a reply to message #4067] |
Wed, 03 June 2009 09:32 |
|
Hi all,
On 2009-06-03 01:20:01 +0200, Kristian Duske
<kristian.duske@fernuni-hagen.de> said:
> No, not right now. We haven't added any support for lighting whatsoever
> because we didn't see how it was neccessary for diagram editors, which
> is our main concern ;-).
>
> If it's just a matter of adding methods to Graphics3D, I don't see why
> we couldn't do it though. Jens, what do you think?
Of course we could add some methods for lighting support. :-) If there
is a volunteer who would like to add them ;-) Note that the Graphics3D
interface is implemented at least by two classes, one for LWJGL, the
other one for X3D!
Generally spoken, we have only implemented so far what we need and what
we think 95% of the users would probably need. If there are other
things, please add a bug report (enhancement request). In most cases,
we didn't implement things because we do not like them, but simply
because we didn't have the time.
One note on lights: While OpenGL supports lights, it doesn't support
shadows. So even if we add lights, maybe the effect won't be as
impressive as expected.
Cheers,
Jens
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