light direction

You've found light_position settings in jit.gl.render then, which sets the
light position all objects in your scene. If the last value of the setting
(w) is non zero then the light source is poitional and shines in all
directions with its location set by the x,y and z coordinates. If the w
value is zero, them the light is directional with xyz informing the
direction.
If you want to have more than one light source you need to use the
glcommands of jit.gl.sketch which gives access to the gllight settings. you
can have multiple lights and the commands that specify material colouring,
light position light model etc can be different for each light, with the
light numbers incrementing through gllight0, gllight1 etc. light positions
are affected by transforms you make to the modelview matrix.

You have much more control over lighting using sketch, and yes you can also
have spotlights.

A simple example patch is below, but you should check the red book for more
about lights.

pelado

On Mon, Jun 16, 2008 at 4:19 PM, Brecht wrote:

>
> I was looking through the forum and example patches on the subject of
> lighting.
> What I couldn't find though was how to change the direction of the light?
> It always seems to point at the center of the scene, but what if I'd like to
> make a grid of lights and point them straight down?
>

--
http://www.pelado.co.uk