pdf-page/gpt-5.6-luna / tier-4-gp2y0a21yk

```openscad
// GP2Y0A21YK0F outline model
// Units: mm
// Coordinate system: X = left/right, Y = front (+Y), Z = up

$fn = 64;

// Main dimensions
main_w       = 29.5;
main_d       = 8.4;
main_h       = 8.4;

lens_spacing = 20.0;
lens_x       = lens_spacing / 2;
lens_d       = 6.3;
lens_h       = 3.0;

bar_w        = 10.1;
bar_len      = 14.75;
bar_t        = 1.2;

mount_x      = 3.75;
mount_y      = -9.0;
mount_hole_d = 2.0;

ear_x        = 18.5;
ear_r        = 3.75;
ear_t        = 2.0;
ear_hole_d   = 3.2;

cable_r      = 1.0;
cable_len    = 18.0;


// Rounded rectangular prism
module rounded_box(size, r = 1.0, center = false) {
    x = size[0];
    y = size[1];
    z = size[2];

    translate(center ? [-x/2, -y/2, -z/2] : [0, 0, 0])
    hull() {
        for (ix = [r, x-r])
            for (iy = [r, y-r])
                translate([ix, iy, 0])
                    cylinder(r = r, h = z);
    }
}


// Main lens case
module lens_case() {
    difference() {
        union() {
            // Main case
            translate([-main_w/2, -main_d/2, 0])
                cube([main_w, main_d, main_h]);

            // Slight upper lens-frame shoulder
            translate([-13.5, -3.6, main_h - 0.8])
                cube([27.0, 7.2, 0.8]);
        }

        // Shallow rectangular optical recesses
        for (x = [-lens_x, lens_x]) {
            translate([x - 3.0, -3.15, main_h - 0.35])
                cube([6.0, 6.3, 0.5]);
        }
    }
}


// Optical lenses
module optical_lenses() {
    for (x = [-lens_x, lens_x]) {
        // Cylindrical lens housing
        color("black")
            translate([x, 0, main_h - 0.1])
                cylinder(d = lens_d, h = lens_h);

        // Slightly raised optical window
        color("dimgray")
            translate([x, 0, main_h + lens_h - 0.25])
                cylinder(d = 4.8, h = 0.35);
    }
}


// Side mounting ears with through holes
module mounting_ears() {
    for (x = [-ear_x, ear_x]) {
        difference() {
            union() {
                color("black")
                    translate([x, 0, 0])
                        cylinder(r = ear_r, h = ear_t);

                // Narrow attachment neck to the main case
                translate([
                    min(x, x + (x > 0 ? -ear_r : ear_r)),
                    -2.0,
                    0
                ])
                cube([
                    abs(x) - main_w/2 + ear_r,
                    4.0,
                    ear_t
                ]);
            }

            translate([x, 0, -0.1])
                cylinder(d = ear_hole_d, h = ear_t + 0.2);
        }
    }
}


// Thin connecting bar / lower extension
module connecting_bar() {
    difference() {
        union() {
            // Main thin plate extending toward -Y
            translate([-bar_w/2, -4.2 - bar_len, 0])
                cube([bar_w, bar_len, bar_t]);

            // Short overlap beneath the lens case
            translate([-bar_w/2, -4.8, 0])
                cube([bar_w, 1.2, 2.0]);

            // Raised side ribs near the case
            translate([-bar_w/2, -5.0, 0])
                cube([1.2, 5.0, 2.5]);

            translate([bar_w/2 - 1.2, -5.0, 0])
                cube([1.2, 5.0, 2.5]);
        }

        // Two mounting holes in the connecting bar
        for (x = [-mount_x, mount_x]) {
            translate([x, mount_y, -0.1])
                cylinder(d = mount_hole_d, h = bar_t + 0.2);
        }

        // Cable exit notch at the rear edge
        translate([-2.0, -4.2 - bar_len - 0.1, -0.1])
            cube([4.0, 3.0, bar_t + 0.2]);
    }
}


// Simplified round cable
module cable() {
    // Cable exits from the rear (-Y) edge
    color("black")
        translate([0, -4.2 - bar_len - 1.0, 0.6])
            rotate([90, 0, 0])
                cylinder(r = cable_r, h = cable_len);

    // Gentle strain-relief section
    color("black")
        translate([0, -4.2 - bar_len + 0.2, 0.6])
            rotate([90, 0, 0])
                cylinder(r = 1.35, h = 2.5);
}


// Small lower PCB/connector support silhouette
module lower_support() {
    translate([-5.05, -6.0, 0])
        cube([10.1, 1.8, 1.2]);

    translate([-4.4, -7.3, 0])
        cube([8.8, 1.3, 0.8]);
}


// Complete sensor
module GP2Y0A21YK0F() {
    color("black")
        lens_case();

    color("black")
        mounting_ears();

    color("black")
        connecting_bar();

    color("black")
        lower_support();

    optical_lenses();
    cable();
}

GP2Y0A21YK0F();
```