[osg-users] Material Properties to Change the Normal Intensity

[Rômulo Cerqueira]

Hi Sebastian,


> 
> Are you planning on using the bump-maps alpha channel, or which alpha do you plan to use.
> 


I wanna to pass a reflectance value to be multiplied by the normal map (normNormal in fragment shader) to simulate real situations. For example, a steel cube (e.g. reflectance = 1.12) should reflect more than a plastic cube (e.g. reflectance = 0.6) for a real sonar. In this case, I need to pass this "reflectance" value to shader for each object present in the scene.


> 
> What kind of input geometries do you use? Are the objects with the different reflectances models or can one model have multiple parts with different reflectance values?
> 


Any kind of geometries: cubes, spheres, cones, structures... Initially all parts of the same object will have an unique reflectance model.

... 

Cheers,
Rômulo[/quote]

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=69770#69770