// Parachute Canopy Model in OpenSCAD
// Made up of 16 alternating red and white "leaves" (gores)
// Assuming 22.5° per leaf, leading to 360/22.5 = 16 leaves

$fn = 100; // Resolution for smooth curves

radius = 50; // Radius of the spherical cap
thickness = 1; // Thickness of the canopy material
num_leaves = 16; // Number of leaves (gores)
angle = 360 / num_leaves; // Angle per leaf in degrees

// Union all leaves and optionally add a vent or strings if desired
union() {
    for (i = [0 : num_leaves - 1]) {
        color(i % 2 == 0 ? "red" : "white")
        rotate([0, 0, i * angle])
        difference() {
            rotate_extrude(angle = angle, convexity = 10)
            intersection() {
                circle(radius);
                square([radius, radius]);
            }
            // Inner shell for thickness
            rotate_extrude(angle = angle + 0.1, convexity = 10) // Slight overlap to ensure clean cut
            intersection() {
                circle(radius - thickness);
                square([radius - thickness, radius - thickness]);
            }
        }
    }
}

// Optional: Add a small vent at the top by differencing a cylinder
// difference() {
//     <above union>
//     translate([0, 0, radius - 5]) cylinder(h = 10, r = 5); // Vent hole
// }

// Optional: Add shroud lines (strings)
// For simplicity, not included, but you can add cylinders from bottom edges to a central point below.