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Fix egg module in regular_shapes.scad #18

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Fix egg module in regular_shapes.scad #18

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17 changes: 10 additions & 7 deletions regular_shapes.scad
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,7 @@ module ellipse(width, height) {
scale([1, height/width, 1]) circle(r=width/2);
}

// The ratio of lenght and width is about 1.39 for a real egg
// The ratio of length and width is about 1.39 for a real egg
module egg_outline(width, length){
translate([0, width/2, 0]) union(){
rotate([0, 0, 180]) difference(){
Expand Down Expand Up @@ -235,12 +235,15 @@ module square_pyramid(base_x, base_y,height)
polyhedron(points=[[-w,-h,0],[-w,h,0],[w,h,0],[w,-h,0],[0,0,height]],triangles=[[0,3,2,1], [0,1,4], [1,2,4], [2,3,4], [3,0,4]]);
}

module egg(width, lenght){
rotate_extrude()
difference(){
egg_outline(width, lenght);
translate([-lenght, 0, 0]) cube(2*lenght, center=true);
}
module egg(width, length)
{
rotate_extrude(){
difference(){
egg_outline(width, length);
// Cut off half of egg so all x corrdinates are positive for rotate_extrude()
translate([-width/2-1, 0]) square([width/2+1, max(length, width)+2]); // egg_outline(...) makes a circle of radius width if width > length.
}
}
}

// Tests:
Expand Down