3D Printing Course for Blind and Visually Impaired Learners

// Parametric Design Template // Demonstrates how to create designs that adapt to different inputs // This pattern allows you to quickly generate variations

// ============================================ // CUSTOMIZABLE PARAMETERS // ============================================

// Box dimensions (change these to regenerate different sizes) box_width = 40; box_depth = 40; box_height = 30;

// Feature sizing (scales with box size) corner_radius = 3; wall_thickness = 2;

// Boolean flags for feature toggling include_lid = true; include_feet = true; hollow_interior = true;

// ============================================ // QUALITY SETTINGS // ============================================ $fn = 30; // Fragment quality

// ============================================ // PARAMETRIC MODULES // ============================================

// Simple box with rounded corners module rounded_box(width, depth, height, radius) { hull() { // Create 8 corner spheres to define the shape translate([radius, radius, radius]) sphere(r = radius); translate([width - radius, radius, radius]) sphere(r = radius); translate([radius, depth - radius, radius]) sphere(r = radius); translate([width - radius, depth - radius, radius]) sphere(r = radius); translate([radius, radius, height - radius]) sphere(r = radius); translate([width - radius, radius, height - radius]) sphere(r = radius); translate([radius, depth - radius, height - radius]) sphere(r = radius); translate([width - radius, depth - radius, height - radius]) sphere(r = radius); } }

// Box with optional hollow interior module box_body(width, depth, height, wall, hollow) { if (hollow) { difference() { rounded_box(width, depth, height, corner_radius);

        translate([wall, wall, wall])
            rounded_box(width - 2*wall, 
                       depth - 2*wall, 
                       height - 2*wall, 
                       corner_radius);
    }
} else {
    rounded_box(width, depth, height, corner_radius);
}

}

// Optional feet/standoff supports module feet(width, depth, foot_height, foot_radius) { foot_spacing_x = width * 0.8; foot_spacing_y = depth * 0.8;

translate([width/2 - foot_spacing_x/2, depth/2 - foot_spacing_y/2, 0])
    cylinder(h = foot_height, r = foot_radius, $fn = 16);
translate([width/2 + foot_spacing_x/2, depth/2 - foot_spacing_y/2, 0])
    cylinder(h = foot_height, r = foot_radius, $fn = 16);
translate([width/2 - foot_spacing_x/2, depth/2 + foot_spacing_y/2, 0])
    cylinder(h = foot_height, r = foot_radius, $fn = 16);
translate([width/2 + foot_spacing_x/2, depth/2 + foot_spacing_y/2, 0])
    cylinder(h = foot_height, r = foot_radius, $fn = 16);

}

// Optional lid/cover that fits on top module lid(width, depth, lid_thickness, clearance) { translate([0, 0, -lid_thickness]) cube([width + 2clearance, depth + 2clearance, lid_thickness], center = true); }

// ============================================ // MAIN ASSEMBLY // ============================================

// Render the main body box_body(box_width, box_depth, box_height, wall_thickness, hollow_interior);

// Add feet if enabled if (include_feet) { feet(box_width, box_depth, 2, 1.5); }

// Add lid if enabled (displayed above for clarity) if (include_lid) { translate([0, 0, box_height + 3]) lid(box_width, box_depth, wall_thickness, 0.5); }

// ============================================ // USAGE TIPS // ============================================ // 1. Change top-level parameters to regenerate designs quickly // 2. Toggle include_lid and include_feet to test variations // 3. Adjust corner_radius for different aesthetic styles // 4. Export at different scales for prototyping // 5. Combine multiple parametric modules for complex designs