gistfile1.txt

l1=15;
l2=50/4;
h=16;
step=0.3;

module wavey(length, height, thickness, amplitudes, periods, step) {
    edge=1;
    
    amp_bot = amplitudes[0];
    amp_top = amplitudes[1];
    
    sine_coords=[ for (l = [0:step:length])
        let (
            edge_factor = (l<edge || l>(length-edge))
                ? 1-(max(edge-l, l-(length-edge))/edge)
                : 1
            )
        [
            l,
            edge_factor*sin(-(l/length)*((periods*2+1)*180.0))
        ]
    ];
    

    for (i=[0:len(sine_coords)-2]) {
        coord1 = sine_coords[i];
        coord2 = sine_coords[i+1];
        
        translate([i*0.1, 0, 0])
        polyhedron(
            points = [
                // base ↙ ↘ ↗ ↖ 
                [coord1[0], amp_bot*coord1[1], 0],
                [coord2[0], amp_bot*coord2[1], 0],
                [coord2[0], amp_bot*coord2[1]+thickness, 0],
                [coord1[0], amp_bot*coord1[1]+thickness, 0],
                //  top ↙ ↘ ↗ ↖ 
                [coord1[0], amp_top*coord1[1], height],
                [coord2[0], amp_top*coord2[1], height],
                [coord2[0], amp_top*coord2[1]+thickness, height],
                [coord1[0], amp_top*coord1[1]+thickness, height],
            ],
            faces = [
              [0,1,2,3],  // bottom
              [4,5,1,0],  // front
              [7,6,5,4],  // top
              [5,6,2,1],  // right
              [6,7,3,2],  // back
              [7,4,0,3] // left
            ],
            convexity = 10x,
        );
    };
    

}

wavey(0.4, 1, 0.2, [0.2,0], 10, 0.2);
//translate([0, 0, 1]) {
//    wavey(l1, 1, 0.04, 0.05, 10, 0.1);
//}
//*rotate([0,0,90]) wavey(h, 0.1, l1, 0.05, 10, 0.1); V