pdf-page/gpt-5.6-terra / tier-4-gp2y0d413k

```openscad
// Sharp GP2Y0D413K0F outline model
// Units: mm
// Coordinate system:
//   Body center = origin
//   +Z = up
//   +Y = front / lens side

$fn = 48;

// ---------- Dimensions ----------
body_x = 29.45;
body_y = 13.50;
body_z = 13.05;

lens_case_z = 8.40;
lens_opening_z = 7.20;

front_bezel_y = 2.00;
lens_projection_y = 6.30;

pwb_x = 16.30;
pwb_y = 13.50;
pwb_t = 1.20;

connector_x = 10.10;
connector_y = 5.20;
connector_z = 5.80;

// Lens center positions measured from left body edge
emitter_center_x  = -body_x/2 + 4.50;
detector_center_x = -body_x/2 + 19.70;

// ---------- Colors ----------
case_color      = [0.12, 0.12, 0.12];
bezel_color     = [0.08, 0.08, 0.08];
lens_color      = [0.18, 0.22, 0.26];
pwb_color       = [0.20, 0.34, 0.16];
connector_color = [0.86, 0.86, 0.82];
pin_color       = [0.72, 0.72, 0.68];

// ---------- Helpers ----------
module centered_cube(size_xyz) {
    cube(size_xyz, center = true);
}

module rounded_box(size_xyz, r = 0.4) {
    x = size_xyz[0];
    y = size_xyz[1];
    z = size_xyz[2];

    hull() {
        for (ix = [-1, 1])
            for (iy = [-1, 1])
                for (iz = [-1, 1])
                    translate([
                        ix * (x/2-r),
                        iy * (y/2-r),
                        iz * (z/2-r)
                    ])
                    sphere(r);
    }
}

// ---------- Main Case ----------
module sensor_case() {
    color(case_color)
    rounded_box([body_x, body_y, body_z], 0.45);

    // Slight lower molding step visible around lower front area
    color(case_color)
    translate([0, body_y/2 - 1.0, -body_z/2 + 1.0])
        centered_cube([body_x - 0.6, 1.2, 2.0]);
}

// ---------- Front Lens Case ----------
module front_lens_case() {
    bezel_front_y = body_y/2 + front_bezel_y/2;
    housing_front_y = body_y/2 + front_bezel_y + lens_projection_y/2;

    // Full-width front bezel
    color(bezel_color)
    translate([0, bezel_front_y, 1.1])
        centered_cube([body_x - 0.5, front_bezel_y, lens_case_z]);

    // Left emitter housing
    color(case_color)
    translate([emitter_center_x, housing_front_y, 1.1])
        rounded_box([7.00, lens_projection_y, lens_case_z], 0.25);

    // Right detector housing
    color(case_color)
    translate([detector_center_x + 1.3, housing_front_y, 1.1])
        rounded_box([13.80, lens_projection_y, lens_case_z], 0.25);

    // Emitter lens circular window
    color(lens_color)
    translate([
        emitter_center_x,
        body_y/2 + front_bezel_y + lens_projection_y + 0.03,
        1.1
    ])
    rotate([90, 0, 0])
        cylinder(h = 0.35, d = 5.20, center = false);

    // Emitter inner ring
    color([0.03, 0.03, 0.03])
    translate([
        emitter_center_x,
        body_y/2 + front_bezel_y + lens_projection_y + 0.39,
        1.1
    ])
    rotate([90, 0, 0])
        cylinder(h = 0.12, d = 3.90, center = false);

    // Detector rectangular lens window
    color(lens_color)
    translate([
        detector_center_x + 1.3,
        body_y/2 + front_bezel_y + lens_projection_y + 0.03,
        1.1
    ])
    centered_cube([9.30, 0.35, 5.40]);

    // Detector inner dark optical region
    color([0.04, 0.04, 0.04])
    translate([
        detector_center_x + 1.3,
        body_y/2 + front_bezel_y + lens_projection_y + 0.23,
        1.1
    ])
    centered_cube([7.80, 0.16, 3.80]);
}

// ---------- PWB ----------
module pwb() {
    // PWB is mounted below the sensor case.
    color(pwb_color)
    translate([2.1, 0.4, -body_z/2 - pwb_t/2])
        centered_cube([pwb_x, pwb_y, pwb_t]);

    // Small exposed board edge at front
    color(pwb_color)
    translate([2.1, body_y/2 + 0.35, -body_z/2 - pwb_t/2])
        centered_cube([pwb_x, 0.8, pwb_t]);
}

// ---------- Bottom Connector ----------
module connector() {
    connector_center_x = -4.0;
    connector_center_y = 1.3;
    connector_center_z = -body_z/2 - pwb_t - connector_z/2 + 0.8;

    // Connector housing
    color(connector_color)
    translate([
        connector_center_x,
        connector_center_y,
        connector_center_z
    ])
    rounded_box([connector_x, connector_y, connector_z], 0.25);

    // Recess / front opening
    color([0.12, 0.12, 0.12])
    translate([
        connector_center_x,
        connector_center_y + connector_y/2 + 0.02,
        connector_center_z + 0.7
    ])
    centered_cube([7.4, 0.18, 2.8]);

    // Three connector terminals
    for (i = [-1, 0, 1]) {
        color(pin_color)
        translate([
            connector_center_x + i * 2.25,
            connector_center_y,
            connector_center_z - connector_z/2 - 1.8
        ])
        centered_cube([0.75, 0.65, 3.6]);
    }

    // Terminal identification marks
    for (i = [-1, 0, 1]) {
        color([0.18, 0.18, 0.18])
        translate([
            connector_center_x + i * 2.25,
            connector_center_y + connector_y/2 + 0.12,
            connector_center_z + 0.7
        ])
        rotate([90, 0, 0])
            cylinder(h = 0.12, d = 0.85, center = false);
    }
}

// ---------- Assembly ----------
sensor_case();
front_lens_case();
pwb();
connector();
```