Using Attributes As Stylesheet Values?

[Atom]

Hi All,

 

I have a crowd system with an attribute that I want to route to a value in the principle shader.

I have added a stylesheet text box and I have the following code.

{
    "styles":
    [
        {
            "target":{"pointGroup" : "@agentgroup=redagents"},
            "overrides":{"materialParameters":{"basecolor":[0, @sf_agent_tint, 0]}}
        },
        {
            "target":{"pointGroup" : "@agentgroup=greenagents"},
            "overrides":{"materialParameters":{"basecolor_texture":"$HIP/cc0_Forest_monster/texture/rock_golem_diffuse_green.png"}}
        },

        {
            "target":{"pointGroup" : "@agentgroup=greenagents"},
            "overrides":{"materialParameters":{"basecolor_texture":"$HIP/cc0_Forest_monster/texture/rock_golem_diffuse_green.png"}}
        }
    ]
}

The line with the attribute @sf_agent_tint is failing.

 

How can I relay attribute values directly to shader values?

Edited October 30, 2015 by Atom

[marcin]

You can bind attribute and use cvex scirpt to export it. See attached example file.

stylesheet.hip

Edited October 31, 2015 by marcin

[Atom]

Thanks for the example, but I don't see how the "tint" variable gets mapped to the diffuse color in the clay shader?

What connects those two? The stylesheet maps t:tint then the material overrides clay with tint, but tint does not exist as a parameter on clay...?

 

Also is there a way to just do it in stylesheet code, I don't really want to lay down CVEX nodes?

[marcin]

Tint exist as a parameter on clay shader. It's visibile at the bottom of Mantra Surface parameters. Take a look inside diffColor subnet. There is red network box where tint parameter is multiplied by diffuse color.

[marcin]

Here is an an example of attribute binding without using cvex script.

stylesheet_attribute_binding.hip

[Atom]

Thanks again for the example file.

 

I am having trouble configuring your example to work with the new PrincipledShader in H15.

 

Using your example I added a principledshader to shopnet1 and set the diffuse color to pure white.

 

I modified the stylesheet code to use basecolorr as the target parameter instead of tint found on clay.

{
        "styles":[
                {
                        "label":"Style",
                        "target":{
                                "label":"Target",
                                "pointGroup":"blueagents"
                        },
                        "overrides":{
                                "material":{
                                        "name":"`opfullpath('shopnet1/principledshader')`"
                                },
                                "materialParameters":{
                                        "basecolorr":{
                                                "script":{
                                                        "binding":"agent_tint"
                                                }
                                        }
                                }
                        }
                }
        ]
}

When I render I get all white agents,however. The intention is to actually replace the value of basecolorr with the attribute value agent_tint. This should produce agents with a varying degree of RED missing from the white base color.

 

Is there some other syntax I need to change to make this work as intended?

[marcin]

Take a look at enclosed file. I used a tint parameter to set basecolorr.

stylesheet_principledshader.hip

[Atom]

Ok, I see. You modified the principled material to conform to the stylesheet.

 

One thing I discovered is that I was able to modify basecolor itself. So I am wondering if agent_tint were actually a vector instead of a float I could modify the X channel of the vector to influence the RED value of the base color.