// Parametric L-Bracket based on engineering drawing
// All dimensions in millimeters (mm)

/* [Key Parameters] */
// Plate thickness for both legs
plate_thickness = 4.0;   // [1.0:0.5:12.0]

// Diameter of the 4 through-holes
hole_diameter = 6.0;     // [2.0:0.5:12.0]

/* [Bracket Dimensions] */
// Total horizontal length (outer face to edge)
bracket_length = 60.0;   // [30:1:120]

// Total vertical height (outer face to edge)
bracket_height = 40.0;   // [20:1:100]

// Total bracket width (depth)
bracket_width = 40.0;    // [20:1:100]

/* [Hole Positions] */
// Centerline of horizontal leg holes from outer vertical face
hole_offset_x = 40.0;    // [10:1:80]

// Centerline of vertical leg holes from outer bottom face
hole_offset_z = 25.0;    // [10:1:60]

// First hole center along width
hole_offset_y1 = 10.0;   // [4:1:30]

// Second hole center along width
hole_offset_y2 = 30.0;   // [10:1:60]

/* [Appearance] */
bracket_color = "LightSlateGray";

// Smoothness of circular cuts
$fn = 64;

module l_bracket() {
    eps = 0.05;

    difference() {
        // Main L-bracket solid body
        union() {
            // Horizontal base leg
            cube([bracket_length, bracket_width, plate_thickness]);

            // Vertical upright leg
            cube([plate_thickness, bracket_width, bracket_height]);
        }

        // Holes in horizontal leg (drilled through Z)
        translate([hole_offset_x, hole_offset_y1, -eps])
            cylinder(d = hole_diameter, h = plate_thickness + 2 * eps);

        translate([hole_offset_x, hole_offset_y2, -eps])
            cylinder(d = hole_diameter, h = plate_thickness + 2 * eps);

        // Holes in vertical leg (drilled through X)
        translate([-eps, hole_offset_y1, hole_offset_z])
            rotate([0, 90, 0])
            cylinder(d = hole_diameter, h = plate_thickness + 2 * eps);

        translate([-eps, hole_offset_y2, hole_offset_z])
            rotate([0, 90, 0])
            cylinder(d = hole_diameter, h = plate_thickness + 2 * eps);
    }
}

color(bracket_color)
l_bracket();