$fn=64;

// --- Parameters ---
tray_outer_diameter = 240;      // Overall width of the tray
tray_inner_diameter = 230;      // Width of the water collection area
tray_height = 35;               // Total height of the tray
base_thickness = 8;             // Thickness of the bottom floor
footing_height = 3;             // Height of the raised bottom gap (feet)
footing_width = 12;             // Width of the outer stable foot ring
center_foot_diameter = 40;      // Diameter of the central support foot
groove_depth = 3;               // Depth of the drainage grooves
groove_width = 8;               // Width of the drainage grooves
num_radial_grooves = 16;        // Number of grooves radiating from center
num_concentric_grooves = 4;     // Number of circular grooves

// --- Module Definition ---
module collection_tray() {
    difference() {
        // Main solid body
        cylinder(d=tray_outer_diameter, h=tray_height);

        // Main inner basin (water collection area)
        translate([0, 0, base_thickness])
            cylinder(d=tray_inner_diameter, h=tray_height);

        // Hollow underneath to create stable outer ring and center foot
        translate([0, 0, -1])
            difference() {
                cylinder(d=tray_outer_diameter - 2*footing_width, h=footing_height + 1);
                // Keep a solid center foot for stability
                translate([0, 0, -1])
                    cylinder(d=center_foot_diameter, h=footing_height + 3);
            }

        // Radial drainage grooves
        for(i = [0 : num_radial_grooves-1]) {
            rotate([0, 0, i * (360 / num_radial_grooves)])
                translate([0, -groove_width/2, base_thickness - groove_depth])
                    cube([tray_inner_diameter/2, groove_width, groove_depth + 1]);
        }

        // Concentric drainage grooves
        for(j = [1 : num_concentric_grooves]) {
            // Calculate radius for each concentric ring
            ring_radius = j * (tray_inner_diameter / 2 / (num_concentric_grooves + 1));
            translate([0, 0, base_thickness - groove_depth])
                difference() {
                    cylinder(r=ring_radius + groove_width/2, h=groove_depth + 1);
                    translate([0, 0, -1])
                        cylinder(r=ring_radius - groove_width/2, h=groove_depth + 3);
                }
        }
    }
}

// --- Render ---
collection_tray();