vase.scad

module cross() {
  square([10,20], center=true);
  square([20,10], center=true);
}

module cross2() {
  minkowski() {
    circle(r=3, $fn=16);
    union() {
      square([10,20], center=true);
      square([20,10], center=true);
    }
  }
}

module slab(h, rot_from, rot_to, scale_from, scale_to) {
  linear_extrude(height=h, twist=rot_to-rot_from, scale=scale_to/scale_from) {
    rotate(-rot_from) scale(scale_from) child();
  }
}

SLABS = 10;
HEIGHT =40;
TWIST = 45;

for (i = [0:SLABS-1]) {
  translate([0,0,i*HEIGHT/SLABS]) slab(HEIGHT/SLABS, i*TWIST/SLABS, (i+1)*TWIST/SLABS, (sin(i*180/SLABS + 50)+2)/2, (sin((i+1)*180/SLABS + 50)+2)/2) cross2();
}