Re: [pygame] Pixel Location in 3D Space?

["Justin Shaw" <wyojustin@xxxxxxxxx>]

You need to look at map projections.  The bottom line is there is more than 
one way to do it.  Probably the easiest is to divide your 2D image into 
length of -180 to 180 degrees of longitude and height -90 to 90 degrees of 
latitude.

x = r * cos(lon) * sin(lat)
y = r * sin(lon) * sin(lat)
z = r * cos(lat)

where:
[x, y, z] are the 3D coords
r = radius of sphere
lat = latitude
lon = longitude

double check me on this, this is just off the top of my head.

Justin

----- Original Message ----- 
From: "HandyGM" <klachemin@xxxxxxxxxxx>
To: <pygame-users@xxxxxxxx>
Sent: Tuesday, December 20, 2005 8:45 PM
Subject: Re: [pygame] Pixel Location in 3D Space?


> Knapp wrote:
> > I think I don't understand you question.
> > Are you maping a 2d pixel map to a 3d triangle surface and want to know 
> > how
> > to do it?
>
> Basically, yes. I have a polygon defined in the texture map (2d), and a 
> polygon defined in the model (3d). For each pixel in the texture map, what 
> would its 3D vertices be?