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Re: QC fustrum angle

Sorry if I was unclear:

How to translate an (x, y, z) point into (x, y) screen coordinates --

For example, you have a rotating globe and want to know the screen coordinates of a certain city on the globe.


Best regards
Sune Watts


---


On Tue, Nov 3, 2009 at 11:02 AM, Chris Wood <email@hidden> wrote:
QC supports 3D space already. There's 2 ways to show a 2D image:
Billboard (this is best for overlays and the like, and is 2D based)
and Sprite (this is similar to billboard, but exists in full 3D space
so you can move it on Z, and rotate on all 3 axis.

Most likely, sprite will cover your needs.

Chris


2009/11/3 Sune Watts <email@hidden>:
> Hello all;
>
> I need to pin a 2D billboard onto a (moving) point in 3D space.
>
> I haven't been able to find any info on the z-axis scaling QC employs.
>
> Has anybody got a handle on mathematically converting a point in 3D space to
> 2D screen space?
>
>
> All the best
> -SW
>
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References: 
 >QC fustrum angle (From: Sune Watts <email@hidden>)
 >Re: QC fustrum angle (From: Chris Wood <email@hidden>)



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