Horde3D

Hi all,

I'm porting across to Horde from a DirectX fixed function renderer where previously we've had access to ambient, diffuse, emissive and specular colour values on a per material (group) basis.

I'm looking to emulate these material settings in Horde by modifying model.shader and am wondering how I go about passing variables into that particular shader?

From the documentation it mentions:

...but I'm having a little trouble joining the dots.

Can anyone help me out with an example? Am I on the right track?

I guess you are searching for h3dSetMaterialUniform?

Do you want to have a single color value or a texture for the different lighting components (e.g. for specular)?

I'm just wanting to be able to set a single colour value for each of ambient, diffuse, etc.

To use h3dSetMaterialUniform do I need to define anything in the XML or can I just create the uniform variables in the shader?

Take a look at the specParams uniform in the model shader. It shows how uniform parameters can be used. You just need to declare a uniform in the shader FX section and then you can use it in the shader code. The uniform value can be set either either with h3dSetMaterialUniform or directly in a material file (see material format documentation).