Thijs Koerselman

I'm having problems mapping textures using jit.gl.multiple. I basically want

to use a texture in environment mapping, and need to scale it using

tex_plane_s/t. Nothing seems to work like using regular jit.gl objects.

There is no change to the mapping at all. Here's an example patch. I can't

scale the dozer so that it will fit the screen. Really wanted to use this

for a project, with just one day to go... guess I'm screwed :-(

I'm having problems mapping textures using jit.gl.multiple. I basically want
to use a texture in environment mapping, and need to scale it using
tex_plane_s/t. Nothing seems to work like using regular jit.gl objects.
There is no change to the mapping at all. Here's an example patch. I can't
scale the dozer so that it will fit the screen. Really wanted to use this
for a project, with just one day to go... guess I'm screwed :-(

texture-mapping-not-working-with-jit-gl-multiple

Thanks for pointing out this tex_map/tex_plane_* bug. Please note

though that tex_plane_s/t only work in tex_map modes 1 and 3. For

environment mapping, they have no effect. You can however use a

shader to do this kind of stuff. Reflection mapping is a bit tricky

as you're taking a vector in 3D and doing a 2D texture lookup, so

scaling the thing. Here's a patch that uses a shader called

td.reflect.jxs that I made to replicate @texgen environment as a

shader so that you can have more control over it. If you need

lighting, this also has to be done in the shader. I can make an

example of how to do that if you need it. Below are the patch *and*

******************************PATCH*********************************

******************************************Shader**********************************

    Shader for for modifying image contrast by interpolation

Hi Thijs,
Thanks for pointing out this tex_map/tex_plane_* bug.  Please note
though that tex_plane_s/t only work in tex_map modes 1 and 3.  For
environment mapping, they have no effect.  You can however use a
shader to do this kind of stuff.  Reflection mapping is a bit tricky
as you're taking a vector in 3D and doing a 2D texture lookup, so
scaling the thing.  Here's a patch that uses a shader called
td.reflect.jxs that I made to replicate @texgen environment as a
shader so that you can have more control over it.  If you need
lighting, this also has to be done in the shader.  I can make an
example of how to do that if you need it.  Below are the patch *and*
the shader.

******************************PATCH*********************************


	Shader for for modifying image contrast by interpolation
and extrapolation

And here's a second way of scaling the texture in the shader with a

slightly different effect. Anyway, compare the 2 ways of scaling and

you can get the idea. There are many domains in which to do it in for

And here's a second way of scaling the texture in the shader with a
slightly different effect.  Anyway, compare the 2 ways of scaling and
you can get the idea.  There are many domains in which to do it in for
different kinds of funkiness.

Hi Wes, thanks a lot! I didn't think about using shaders. This will solve

the problem. Thanks to your quick response I might be able to catch up just

> And here's a second way of scaling the texture in the shader with a

> slightly different effect. Anyway, compare the 2 ways of scaling and

> you can get the idea. There are many domains in which to do it in for

> Shader for for modifying image contrast by

Hi Wes, thanks a lot! I didn't think about using shaders. This will solve
the problem. Thanks to your quick response I might be able to catch up just
in time.

On 9/25/06, Wesley Smith  wrote:
>
> And here's a second way of scaling the texture in the shader with a
> slightly different effect.  Anyway, compare the 2 ways of scaling and
> you can get the idea.  There are many domains in which to do it in for
> different kinds of funkiness.
>
> wes
>
>
>         Shader for for modifying image contrast by
> interpolation
> and extrapolation
>
>
>
>
>
>
>
>
>
>
>
>
>


texture mapping not working with jit.gl.multiple