TexGen (Material stage keyword)
From modwiki
Description
The texgen stage keyword modifies the texture coordinates of the associated map as required by certain effects, such as skyboxes.
Usage
texGen <type>
Parameters
The type parameter can be any of the following values:
- normal
- Unknown effect.
- skybox
- Set the appropriate texture coordinates for a skybox. The associated stage should be a cameraCubeMap.
- wobblesky <x> <y> <z>
- Same as skybox, but rotate the coordinates according to the axis given. There are some inconsistencies in the usage of the x, y, and z components so please see the notes below.
- reflect
- Use the defined stage map for environment mapping.
Example
The following is a typical skybox map stage.
{
blend add
cameraCubeMap env/someskymap
texgen skybox
}
Notes
Wobblesky
Setting the "z" component to a positive value causes the skybox to rotate continuously around the vertical axis. This is used in Doom 3 in some of the Hell levels.
The "x" and "y" components only apply a transformation once upon initial map load much like the way the rotate keyword works. In order to rotate continuously you need to pass an expression like so ...
texgen wobblesky (time * .15) .00 .00
See also
