Creating a probability node

[RTHMan]

How can I create a node for probability masking like the screenshot?

[hannes603]

attrib paint ?

[Librarian]

@RTHMan find those Code's in Fee Lib
 

#if 0
    #include <mathdeep.vfl>
#else
    function
    int sample_pdf(
        float pdf[];
        float uniform_rand;
        ) {
        float cdf[]= create_cdf(pdf);
        return sample_cdf(cdf, uniform_rand);
    }
    
    function
    float random_uniform(
        float seed;
        int offset;
        int core;
        ) {
        if ( core == -1 ) {
            return offset;
        } else if ( core == 0 ) {
            return random(seed, offset);
        } else if ( core == 1 ) {
            return random_brj(seed, offset);
        } else if ( core == 2 ) {
            return random_sobol(seed, offset);
        } else {
            return -1;
        }
    }
#endif

int classes = (chi("../autoClasses") ? chi("numclasses") : chi("../classes")) - 1;

float pdf[];
resize(pdf, classes);

for (int i = classes; i > -1; --i) {
    pdf[i] = chf("../possibility" + itoa(i+1));
}
i@varient = sample_pdf(pdf, select(chi("../randtype"), random_uniform(chf('../seed'), @ptnum, chi("../randtype")-1), @ptnum/(@numpt-0.99999)));

//float cdf[]= create_cdf(pdf);
//create_pdf_fee();
//i@varient = sample_pdf(pdf, chf('a'));

 

[RTHMan]

In VEX?

[Librarian]

@RTHMan Yes
find FeELib-for-Houdini on github
you have example How to use on variant by id 
 

[RTHMan]

I'm having a hard time finding the code in FeELib-for-Houdini.