hi carsten,
Thanks.... that mean
setBeacon is like setting a parent translation node of the setPosition.
If ..... setPostion(Pnt3f(1,1,1))...... Then 1,1,1 is relative translation
......with respect to .... setBeacon's(5,5,5).
And now if we set beacon to 6,6,6 then still the position of the light with
respect to beacon will be 1,1,1 but with respect to world coordinate system
light position is changed.
Best Regards
Brajesh Lal
----- Original Message ----
From: Carsten Neumann <[EMAIL PROTECTED]>
To: [email protected]
Sent: Tuesday, June 26, 2007 1:45:45 PM
Subject: Re: [Opensg-users] difference in setPosition and setBeacon based
position control
Hello Brajesh,
Brajesh Lal wrote:
> Hi,
>
> What is difference in "setPosition" and "setBeacon" with respect to Light.
the beacon determines the coordinate system the light is located in, the
position describes the light's position relative to that coordinate system.
> If i set both of the properties
> e.g.
> setPosition(Pnt3f(0,0,0));
> setBeacon(some node);
>
> if some node is a transform node and set to 5,5,5.
> Then at which position the light will be placed in a scene.
I guess you mean it is a transformation with translation component
(5,5,5). Then the light will be at world coordinates (5,5,5) which
corresponds with the beacon's origin.
> How setPosition and setBeacon are inter connected
The beacon's toWorld matrix is applied to the position.
Hope it helps,
Carsten
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