$fn=64;

// --- Parameters ---
cup_diameter = 65;         // Inner diameter for the washing cups
cup_depth = 20;            // Depth of the cup holders
wall_thickness = 4;        // Thickness of the outer walls
base_thickness = 3;        // Thickness of the bottom floor

brush_stand_height = 45;   // Height of the back block holding the brushes
brush_stand_depth = 20;    // Depth of the back block
brush_hole_spacing = 14;   // Spacing between brush holes
brush_holes = [6, 8, 10, 10, 8, 6]; // Diameters of the individual brush holes

// --- Calculated Variables ---
cup_outer = cup_diameter + (wall_thickness * 2);
cup_offset = cup_outer / 2 + 2; 
total_height = cup_depth + base_thickness;

// --- Geometry ---
difference() {
    union() {
        // Main Cup Holder Base
        hull() {
            translate([-cup_offset, 0, 0]) 
                cylinder(d=cup_outer, h=total_height);
            translate([cup_offset, 0, 0]) 
                cylinder(d=cup_outer, h=total_height);
        }

        // Raised Brush Stand (Back Edge)
        hull() {
            translate([-cup_offset, cup_outer/2 - brush_stand_depth/2, 0])
                cylinder(d=brush_stand_depth, h=brush_stand_height);
            translate([cup_offset, cup_outer/2 - brush_stand_depth/2, 0])
                cylinder(d=brush_stand_depth, h=brush_stand_height);
        }
    }

    // Left Cup Cutout
    translate([-cup_offset, 0, base_thickness])
        cylinder(d=cup_diameter, h=total_height + 1);
        
    // Right Cup Cutout
    translate([cup_offset, 0, base_thickness])
        cylinder(d=cup_diameter, h=total_height + 1);

    // Brush Holes Cutouts
    for (i = [0 : len(brush_holes) - 1]) {
        translate([
            (i - (len(brush_holes)-1)/2) * brush_hole_spacing,
            cup_outer/2 - brush_stand_depth/2,
            base_thickness
        ])
        cylinder(d=brush_holes[i], h=brush_stand_height + 1);
    }
}