// Diameter of the inside cylinder
diameter = 62;
// Height of the inside cyliner
height = 40;
// Number of cuts / ridges around the planter
cuts = 20;
// Depth of the cuts / ridges around the planter
cut_depth = 3;
// Thickness of the wall of the planter
thickness = 3;
// Roundness of the bottom, where 0 is a straight flat bottom, and 100 is a sphere bottom
bottom_roundness_percent = 85;
// Optional wall mount plate, 0 is no plate and 100 makes the planter a half-circle
wall_mount_percent = 30;

module _end_of_customizer() {}

$fn = $preview ? 20 : 60;

// The bottom half of a sphere
module half_sphere(d) {
    difference() {
        sphere(d = d);

        translate([-d/2 - 1, -d/2 - 1, 0])
        cube([d + 2, d + 2, d + 1]);
    }
}

module chop_off(x, thickness) {
    assert($children == 1);

    difference() {
        children(0);

        translate([-500 - x, -500, -500])
        cube([500, 1000, 1000]);
    }

    hull()
    intersection() {
        children(0);

        translate([-x, -500, -500])
        cube([thickness, 1000, 1000]);
    }
}

// The body, a full cylinder with ridges
//
// Its diameter is calculated from `diameter` (for the hollow inside), `thickness`, and `cut_depth`.
module body(h, fn = 20) {
    outer_diameter = diameter + thickness * 2;

    function diam(x) = 1 + cut_depth / outer_diameter * 2 * sin(x * 180) ^ 3;

    for(cut = [0:cuts - 1]) {
        for(i = [0:fn - 1]) {
            angle1 = 360 / cuts / fn * (cut * fn + i);
            angle2 = 360 / cuts / fn * (cut * fn + i + 1);

            vary1 = diam(i / fn);
            vary2 = diam((i + 1) / fn);

            linear_extrude(h)
            polygon([
                [0, 0],
                [vary1 * outer_diameter / 2 * cos(angle1),
                 vary1 * outer_diameter / 2 * sin(angle1)],
                [vary2 * outer_diameter / 2 * cos(angle2),
                 vary2 * outer_diameter / 2 * sin(angle2)],
            ]);
        }
    }
}

// The bottom part of the vase, which is sphere-like with ridges and a flat bottom
//
// The bottom is controlled by `bottom_roundness_percent` (0 = no roundness at all, 100 = no flat bottom at all)
module bottom() {
    full_diameter = (diameter + thickness * 2) + cut_depth * 2;

    intersection() {
        translate([0, 0, -full_diameter / 2 * bottom_roundness_percent / 100])
        body(full_diameter / 2 * bottom_roundness_percent / 100);

        half_sphere(d = full_diameter);
    }
}

// The planter
//
// body with cylinder cut out (`diameter`) and bottom part
module planter() {
    difference() {
        body(height);

        translate([0, 0, -1])
        cylinder(d = diameter, h = height + 2);

        scale([1, 1, 0.2])
        half_sphere(d = diameter);
    }

    bottom();
}

// Planter with optional wall mount plate
//
// If `wall_mount_percent` is 0, no plate, if 100, the planter is a half circle
if(wall_mount_percent > 0) {
    full_diameter = (diameter + thickness * 2) + cut_depth * 2;

    wall_x = full_diameter / 2 * (1 - wall_mount_percent / 100);

    wall_depth = full_diameter * sqrt(1 - (1 - wall_mount_percent / 100)^2);

    chop_off(wall_x, thickness) {
        planter();
    }
} else {
    planter();
}