use <./entry.scad> $vpt = [120,-30,63]; $vpr = [74,0,25]; $vpd = 550; $vpf = 22.50; animateAngleBrackets(at=$t); module animateAngleBrackets(at=$t) { x = 150; y = 70; dx = abs(lerp(a=-20, b=20, t=at)); dy = abs(lerp(a=-50, b=50, t=at)); u = abs(at - 0.5) > 0.25 ? 3 : 4; angleBrackets(visualize=true, boxWidth=x+dx, boxDepth=y+dy, u=u); }