How to Set Shader in DazScript?

bluelake_2cfb0bd048

I've cobbled together some informal DazScript to find the shader name for each surface selected (see attached). Now, how do I set the shader to a new value for the selected surfaces? For instance, how do I change the shader from "Iray Uber" to "DAZ Studio Default" or vice versa? Thanks in advance for any help!
--John

        sel = Scene.getPrimarySelection()
        var oObj = sel.getObject();
        var oShape = oObj.getCurrentShape();
        var aMaterials = oShape.getAllSelectedMaterials();
        if( aMaterials.length < 1 ){
            aMaterials = oShape.getAllMaterials();
        }
        alen= aMaterials.length;
        for( i=0 ; i<alen ; i++ ){
            mat = aMaterials[i];
            debug( "mat:", i, "--", mat.getName(), "--", mat.getMaterialName() )
        }

 

Richard Haseltine

Have you seen this sample https://docs.daz3d.com/public/software/dazstudio/4/referenceguide/scripting/api_reference/samples/material/deep_copy/start ?

bluelake_2cfb0bd048

Thank you, Richard -- promising example. I'll update once I've played with the script some.

 

bluelake_2cfb0bd048

Thank you for the assistance, Richard. The script didn't directly fit what I needed, but playing with it did lead me to a solution, that I'll share here in case it helps anyone searching the forum later.

The reason I wanted to set the shader myself in code was so I could do a better job handling opacity maps, especially when doing image masks to identify which pixels of the output image came from which figures/surfaces in the scene. 

So two use cases: 

• 1. using the dzDefault shader (content:/Shader Presets/DS Defaults/dzDefault) often loses opacity maps when applied (I'm guessing because iray mats use a different property name for opacity);
• 2. and I often use geomshells when constructing masks, and it can be useful to copy over opacity maps to the mask

Below are 2 informal DAZ script functions and a third debugging function while I tested them.

    getDictOpa = function getDictOpa(){
        sel = Scene.getPrimarySelection()
        var oObj = sel.getObject();
        var oShape = oObj.getCurrentShape();
        var aMaterials = oShape.getAllSelectedMaterials();
            if( aMaterials.length < 1 ){ aMaterials = oShape.getAllMaterials(); }
        var dictOpa = [];
        alen= aMaterials.length;
        for( i=0 ; i<alen ; i++ ){
            mat = aMaterials[i];
            key= mat.getName()
            opa= mat.getOpacityMap();
            dictOpa[ key ] = opa;
        }
        return dictOpa
    }

    -----
    
    setDictOpa = function setDictOpa( dictOpa ){
        sel = Scene.getPrimarySelection()
        var oObj = sel.getObject();
        var oShape = oObj.getCurrentShape();
        var aMaterials = oShape.getAllSelectedMaterials();
            if( aMaterials.length < 1 ){ aMaterials = oShape.getAllMaterials(); }
        alen= aMaterials.length;
        for( i=0 ; i<alen ; i++ ){
            mat = aMaterials[i];
            key = mat.getName();
            mat.setOpacityMap( dictOpa[key] );
        }
    }

    -----

    dumpDictOpa = function dumpDictOpa( dictOpa ){
        for( var key in dictOpa ){ 
            if( key=="pushIfNotExists" ) continue;  // hack
            if( key=="find" ) continue;  // hack
            if( key=="findValue" ) continue;  // hack
            debug( "dumpdict:", key, "--", dictOpa[key] );
        }
    }

    -----
    Usage:
        - select figure and optionally surfaces (if no surfaces selected, all are used)
        - run this in Script IDE window:
            tempopa = getDictOpa()
        - select the figure you want to copy the opacity maps to
        - run this in the Script IDE window:
            setDictOpa( tempopa );
        - it applies the copied opacity maps by surface name

 

These don't directly set the shader like I originally asked (it looked a little hairy assembling a full shader from scratch to apply), but they are workarounds that get the job done -- which is generally good enough 

 

Richard Haseltine

I thought the name used  to match, but certainly in DS 6 it now shows as name = Cutout Opacity. I may have been thinking of something else, or it may have been modified (which seems fairly unlikely).