VEXpression

Attribute From Surface

/* Input1 is 'Geometry to Transfer Attribute to' */
/* Input2 is 'Geometry to Transfer Attribute from' */
string attrib_name = 'attrib_name';
float search_lim = 0.5;

float accum = point(0, attrib_name, @ptnum);
for(int i=0; i<nprimitives(1); i++)
{
    vector bbxmin, bbxmax;
    getbbox(1, itoa(i), bbxmin, bbxmax);

    bbxmin = bbxmin - search_lim*1.5;
    bbxmax = bbxmax + search_lim*1.5;
    int inbounds = (bbxmin.x<@P.x) && (bbxmin.y<@P.y) && (bbxmin.z<@P.z)
                   && (bbxmax.x>@P.x) && (bbxmax.y>@P.y) && (bbxmax.z>@P.z);
    
    if(inbounds)
    {
        int temp_prim;
        vector temp_uv;
        float f = xyzdist(@OpInput2, itoa(i), @P, temp_prim, temp_uv, search_lim);
        f = fit(f, 0.0, search_lim, 1.0, 0.0);
        
        float v = primuv(@OpInput2, attrib_name, temp_prim, temp_uv);
        v *= smooth(0.0, 1.0, f);
        accum = max(accum, v);
    }
}
setpointattrib(0, attrib_name, @ptnum, accum);