I have a problem with this http://www.thingiverse.com/thing:140343 project
when rendering in openscad. The logo is extruded out from the surface, but
does not go into the surface to make the negative on the other side of the
hinge. Can someone help me?

Before rendering:
http://forum.openscad.org/file/n14953/ska.png

After rendering:
http://forum.openscad.org/file/n14953/Sk%C3%A6rmbillede_2015-12-05_kl.png

"code"
// preview[view:south, tilt:top]

/* [Global] */

// Load a 100x100 pixel image.(images will be stretched to fit) Simple, high
contrast images work best. Make sure to click the Invert Colors checkbox!
image_file = "cp.dat"; // [image_surface:100x100]

// Where would you like the hinge in relation to your image?
hinge_placement = 1; // [1:top,2:left,3:bottom,4:right]

// What height would you like for the embossed area (mm)?
emboss_height = 1.5;

/* [Hidden] */
$fa = 6;
$fs = 1.5;
image_width = 40;
image_length = 40;
image_padding = 4;

handle_width = image_width + image_padding*2;
handle_length = 70;
handle_height = emboss_height+2.5;
nub = 3; // hinge size
tol = 0.4; // spacing between hinge pieces

assembly();

module assembly() {
stamp_top(90hinge_placement);
stamp_bottom(90hinge_placement);
}

module stamp_top(rot=90) {
translate([1,0,0])
union() {
difference () {
translate([handle_length + nub + tol, -handle_width/2, 0])
rotate([0,0,90]) handle();

translate([handle_length-image_length/2+nub+tol,0,handle_height])
rotate([0,180,rot]) plate();
}

    // hinge
    translate([-1,handle_width/2-2*nub,handle_height]) hinge_m();
    mirror([0,1,0]) translate([-1,handle_width/2-2*nub,handle_height])

hinge_m();
translate([-1,-nub,handle_height]) hinge_m();
mirror([0,1,0]) translate([-1,-nub,handle_height]) hinge_m();
}
}

module stamp_bottom(rot=90) {
translate([-1,0,0])
union() {
translate([-handle_length + image_length/2-nub-tol,0,handle_height])
rotate([0,0,-rot]) plate();
mirror([1,0,0]) translate([handle_length + nub + tol,
-handle_width/2, 0])
rotate([0,0,90]) handle();

    // hinge
    translate([1,-nub-tol,handle_height]) hinge_f();
    mirror([0,1,0]) translate([1,-nub-tol,handle_height]) hinge_f();
}

}

module handle() {
difference() {
hull() {
cube([handle_width, handle_length, handle_height]);
translate([image_padding,0,0]) cylinder(r=image_padding,
h=handle_height);
translate([handle_width-image_padding,0,0])
cylinder(r=image_padding, h=handle_height);
}
guide();
}

}

module guide() {
translate([image_padding,0,-.5])
difference() {
cube([image_width, image_length, 1]);
translate([1,1,-0.5]) cube([image_width-2, image_length-2, 2]);
}
}

module hinge_m() {
difference () {
rotate([0,45,0]) union(){
translate([0,0,-nub]) cube ([nub3,nub2, nub2]);
rotate([90,0,0]) {
translate([0,0,-2nub]) cylinder(r=nub,h=2nub);
cylinder(r1=nub,r2=0,h=nub);
}
}
translate([-nub,-nub/2,-handle_height-nub5]) cube([nub5, nub3,
nub*5]);
}
}

module hinge_f() {
len = handle_width/2 - 3nub - 2tol;

difference() {
    rotate([90,-45,0]) 
    difference() {
        union() {
            cylinder(r=nub, h=len);
            translate([-3*nub,-nub,0]) cube([nub*3,nub*2,len]);
        }
        translate([0,0,-0.1]) cylinder(r1=nub+tol,r2=0,h=nub);
        translate([0,0,len-nub+0.1]) cylinder(r1=0,r2=nub+tol,h=nub);
    }
    translate([-nub*4,-len-nub/2,-handle_height-nub*5]) cube([nub*5,

len+nub, nub*5]);
}
}

module plate() {
scale([(image_width)/100,(image_length)/100,emboss_height])
surface(file=image_file, center=true, convexity=5);
}

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Can you upload the cp.dat file you are using.

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Hi Michael

Here is the file. https://www.dropbox.com/s/umqyfgg2wv63bq3/cp.dat?dl=0

I am also getting the same error with the other .dat's in the project.

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Well some error has slithered into later releases...

I get the same error, but not in 2013.06, I'll try some other versions and
see if I can drill down to the root cause.

http://forum.openscad.org/file/n14983/2013-0_v_2015-10-17.jpg

If your project is urgent you can find 2013.06  here
http://files.openscad.org/

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Unless specifically shown otherwise above, my contribution is in the Public Domain; to the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. Obviously inclusion of works of previous authors is not included in the above.

The TPP is no simple “trade agreement.”  Fight it! http://www.ourfairdeal.org/  time is running out!

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2014.03 is also OK.

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This did the trick Michael, thank you so much for your valuable help! It has
helped me a lot!

Best regards
Anders, Denmark

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Seems to be an issue with scale() and surface().

Issue 1512 raised https://github.com/openscad/openscad/issues/1512

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I found that if you remove the coincident faces the problem goes away.

In the translate() before the two plate() calls, change the z to
handle_height+0.01.

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Unless specifically shown otherwise above, my contribution is in the Public Domain; to the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. Obviously inclusion of works of previous authors is not included in the above.

The TPP is no simple “trade agreement.”  Fight it! http://www.ourfairdeal.org/  time is running out!

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