I'm playing around with moldings.  I thought I was careful to keep all of
the 2D stuff together and all of the 3D stuff together, but I guess I was
wrong.

1. if I do a hull() on 2D objects, don't I get a 2D object as a result?

2. can a module() return a 2D object?

3. sure would be nice if the error messages gave even a HINT about where
   the problem was.  I doubt that I am the first to whine about this.

Thanks

Jon

$fn = 100;
eps = 0.1;

module RoundedSquare(x, y) {
hull() {
translate([0,    1]) square(1);
translate([x-4, y-4]) circle(4);
translate([x-1,  1]) square(1);
translate([0,  y-1]) square(1);
}
}

module CrossSection1()
difference() {
union() {
square([10, 20]);
translate([10, 3])
circle(2);
}
translate([10, 15])
circle(2);
}

CrossSection1();

translate([0, 30, 0])
CrossSection2();

module CrossSection2()
difference() {
union() {
RoundedSquare(10, 20);
translate([10, 12])
circle(2);
}
translate([10, 5])
circle(2);
}

translate([80, 0, 0])
rotate([0, -90, 0])
linear_extrude(height = 50)
CrossSection1();

translate([80, 30, 0])
rotate([0, -90, 0])
linear_extrude(height = 50)
CrossSection2();

difference() {
translate([-50, 50 + 15, 0])
rotate([0, -90, 90])
linear_extrude(height = 50)
CrossSection2();
translate([-50, 0, -eps])
rotate([0, -90, 0])
linear_extrude(height = 50)
CrossSection2();
}

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Your model has 2 2D objects and 3 3D objects at the top level. This is
clearly visible in F5 preview.

You can't export a mixture of 2D and 3D objects, we don't support any
file formats where this makes sense, and the F6 render fails for this
reason.

If you want to export to STL, you'll need to disable the 2D objects
before doing F6 and Export. Likewise, if you want to export to DXF,
you'll need to disable the 3D objects before doing F6 and Export.

On 25 June 2016 at 17:58, jon <jon@jonbondy.com
mailto:jon@jonbondy.com> wrote:

 I'm playing around with moldings.  I thought I was careful to keep
 all of the 2D stuff together and all of the 3D stuff together, but
 I guess I was wrong.

 1) if I do a hull() on 2D objects, don't I get a 2D object as a
 result?

 2) can a module() return a 2D object?

 3) sure would be nice if the error messages gave even a HINT about
 where the problem was.  I doubt that I am the first to whine about
 this.

 Thanks

 Jon

 ---

 $fn = 100;
 eps = 0.1;

 module RoundedSquare(x, y) {
     hull() {
         translate([0,     1]) square(1);
         translate([x-4, y-4]) circle(4);
         translate([x-1,   1]) square(1);
         translate([0,   y-1]) square(1);
         }
     }

 module CrossSection1()
     difference() {
         union() {
             square([10, 20]);
             translate([10, 3])
                 circle(2);
             }
         translate([10, 15])
             circle(2);
         }

 CrossSection1();

 translate([0, 30, 0])
     CrossSection2();

 module CrossSection2()
     difference() {
         union() {
             RoundedSquare(10, 20);
             translate([10, 12])
                 circle(2);
             }
         translate([10, 5])
             circle(2);
         }

 translate([80, 0, 0])
     rotate([0, -90, 0])
         linear_extrude(height = 50)
             CrossSection1();

 translate([80, 30, 0])
     rotate([0, -90, 0])
         linear_extrude(height = 50)
             CrossSection2();

 difference() {
     translate([-50, 50 + 15, 0])
         rotate([0, -90, 90])
             linear_extrude(height = 50)
                 CrossSection2();
     translate([-50, 0, -eps])
         rotate([0, -90, 0])
             linear_extrude(height = 50)
                 CrossSection2();
     }


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