#houdini #vex #wrangle

vex example.cc

// point wrangle using 'lage' attribute generated from L-System SOP
// looping over points is like doing a promote max sop

// get the max by looping over the points
float lage_max = 0;

// get point count
int pc = npoints(0);

// loop over points
for(int i=0; i < pc; i++) {
    int result;
    float pl = pointattrib(0, 'lage', i, result);
    
    // update lage_max variable if current value is larger
    if (pl > lage_max) {
        lage_max = pl;
    }
}

// make attribute
f@lage_max = lage_max;

// normalise the initial attr
float normlaised_lage = fit(@lage, 0, lage_max, 0,1);

// do stuff
float falloff = chramp('lage_falloff', normlaised_lage);
vector n = fit01(noise((v@P * ch('n_scale'))), -1,1) * chv('n_amp');
vector push_base = chv('push_base');
vector push = (push_base + n) * falloff;
v@P += push;