$fn=64;

// --- Parameters ---
body_length = 75;      // Overall length of the squeezer
body_width = 20;       // Overall width
body_thickness = 6;    // Thickness (Z-height when printing)

slot_length = 62;      // Length of the internal squeezing slot
slot_width = 1.2;      // Width of the slot (tight enough to squeeze out paste)
feed_hole_dia = 5.5;   // Larger entry hole to easily insert the edge of the tube

// --- Main Shape ---
module toothpaste_squeezer() {
    difference() {
        // Main solid body
        hull() {
            translate([-body_length/2 + body_width/2, 0, 0])
                cylinder(h=body_thickness, d=body_width, center=true);
            translate([body_length/2 - body_width/2, 0, 0])
                cylinder(h=body_thickness, d=body_width, center=true);
        }
        
        // Squeezing slot
        hull() {
            translate([-slot_length/2 + slot_width/2, 0, 0])
                cylinder(h=body_thickness+2, d=slot_width, center=true);
            translate([slot_length/2 - slot_width/2, 0, 0])
                cylinder(h=body_thickness+2, d=slot_width, center=true);
        }
        
        // Feed hole for easy tube insertion
        translate([slot_length/2 - feed_hole_dia/2 + 1, 0, 0])
            cylinder(h=body_thickness+2, d=feed_hole_dia, center=true);
            
        // Ergonomic grip grooves along the edges
        for(x = [-24 : 6 : 20]) {
            translate([x, body_width/2, 0])
                cylinder(h=body_thickness+2, d=2.5, center=true);
            translate([x, -body_width/2, 0])
                cylinder(h=body_thickness+2, d=2.5, center=true);
        }
    }
}

// --- Render ---
// Positioned flat on the Z=0 plane for easy 3D printing
translate([0, 0, body_thickness/2])
    toothpaste_squeezer();