RE: [Algorithms] Scene graphs

[Rachid El G. <ra...@mi...>]

and how would u do that?

if ur tree is holding transforms.. u could have ur light attached as a child
of an object, while affecting a whole other part of the tree..

using light scope nodes or something like that can help, but it depends on
ur pipeline.

Rush
'No bird soars too high..
When it soars with its own wings.'
                  - William Blake

-----Original Message-----
From: gda...@li...
[mailto:gda...@li...]On Behalf Of Jamie
Fowlston
Sent: Friday, August 03, 2001 8:50 AM
To: 'gda...@li...'
Subject: RE: [Algorithms] Scene graphs


Gotcha :)

You can if you make sure you come across the light before anything that is
affected by it.

Jamie


-----Original Message-----
From: Rachid El Guerrab [mailto:ra...@mi...]
Sent: 03 August 2001 16:37
To: gda...@li...
Subject: RE: [Algorithms] Scene graphs


oops sorry my mispelling :)

I meant updated.

Rush
'No bird soars too high..
When it soars with its own wings.'
                  - William Blake

-----Original Message-----
From: gda...@li...
[mailto:gda...@li...]On Behalf Of Jamie
Fowlston
Sent: Friday, August 03, 2001 1:55 AM
To: 'gda...@li...'
Subject: RE: [Algorithms] Scene graphs


Sorry, don't understand what you're saying here.

Adapted in what way?

You certainly can do it this way :)

Jamie


-----Original Message-----
From: Rachid El Guerrab [mailto:ra...@mi...]
Sent: 02 August 2001 19:46
To: gda...@li...
Subject: RE: [Algorithms] Scene graphs


the thing is.. moving lights (and other special objects) should be apdated
before u start using them... so u can't render the whole scene in a single
scene-graph tarversal.

'No bird soars too high..
When it soars with its own wings.'
                  - William Blake

-----Original Message-----
From: gda...@li...
[mailto:gda...@li...]On Behalf Of Jamie
Fowlston
Sent: Thursday, August 02, 2001 2:02 AM
To: 'gda...@li...'
Subject: RE: [Algorithms] Scene graphs


My plan: the light has a bounding volume attached to it, so put it in the
appropriate node for an object with that bounding volume....

Jamie


-----Original Message-----
From: Chris Brodie [mailto:Chr...@ma...]
Sent: 02 August 2001 02:07
To: 'gda...@li...'
Subject: RE: [Algorithms] Scene graphs


> From: Rachid El Guerrab [mailto:ra...@mi...]

> (rush) I've used a LightScope node to get around that.. I've
> seen it on some
> other scene graphs.
> it's a node that u attache to all objects that might be affected by a
> certain light (or list of lights). But u activate lights in a
> previous frame
> and use 'em in the current frame for a simple solution,
> otherwise u'll be
> doing all kind of strange tarversals (using priorities,
> backward tarversal,
> single path, etc..)

My hack to make it work:

The way I ended up solving this was with linked light nodes. The 'torch'
node handles transforms, the 'light' node contains the light properties and
is placed in a location in the octree where it'll get rendered before any of
the contained geometry. Of course moving the light by moving he torh would
not see effects until the following frame as by the time you get to the
torch the light is already being used to light geometry.

Again this method is not ideal. It'll fail I guess when the geometry is
bigger than the lights bounds...

Whats the proper (or at least a working) way of doing this?


_______________________________________________
GDAlgorithms-list mailing list
GDA...@li...
http://lists.sourceforge.net/lists/listinfo/gdalgorithms-list
-Virus scanned and cleared ok

_______________________________________________
GDAlgorithms-list mailing list
GDA...@li...
http://lists.sourceforge.net/lists/listinfo/gdalgorithms-list


_______________________________________________
GDAlgorithms-list mailing list
GDA...@li...
http://lists.sourceforge.net/lists/listinfo/gdalgorithms-list
-Virus scanned and cleared ok

_______________________________________________
GDAlgorithms-list mailing list
GDA...@li...
http://lists.sourceforge.net/lists/listinfo/gdalgorithms-list


_______________________________________________
GDAlgorithms-list mailing list
GDA...@li...
http://lists.sourceforge.net/lists/listinfo/gdalgorithms-list
-Virus scanned and cleared ok

_______________________________________________
GDAlgorithms-list mailing list
GDA...@li...
http://lists.sourceforge.net/lists/listinfo/gdalgorithms-list