Houdini Rope Snippet

Want to share a small VEX code snippet for the hanging wires effect. Maybe it will help in your adventure.

// Catenary curve with gravity control
vector A = point(0, "P", 0);
vector B = point(0, "P", @numpt-1);
float L = 12.8;
float gravity = chf("gravity", 0.5);  // Added gravity control, default 0.5
// Quick validation
float d = distance(A, B);
if (L < d) {
    warning("Rope too short!");
    return;
}
int pt = @ptnum;
if (pt == 0) 
    @P = A;
else if (pt == @numpt-1)
    @P = B;
else {
    float t = float(pt) / float(@numpt-1);
    vector pos = lerp(A, B, t);
    
    // Apply sag with gravity control
    float sag = sin(t * PI) * (L - d) * gravity;
    pos.y -= sag;
    
    @P = pos;
}