I am having an issue with the difference function. I created a polygon shape and linear_extrude and put a hole in each end. The hole does not show when I turn debug off. The first image shows with debug on. The second image has debug off. With the third image I move the hole up just to show how far it actually goes into the shape. Any idea why the hole would not show with debug off? <http://forum.openscad.org/file/n15327/shape_debug.png> <http://forum.openscad.org/file/n15327/shape_no_debug.png> <http://forum.openscad.org/file/n15327/shape_depth.png> -- View this message in context: http://forum.openscad.org/issue-with-difference-function-tp15327.html Sent from the OpenSCAD mailing list archive at Nabble.com.

Perhaps you have not set convexity appropriately in the linear_extrude, but that is just a guess without seeing the code. On 24 December 2015 at 21:07, fractorr <fractorr@gmail.com> wrote: > I am having an issue with the difference function. I created a polygon > shape > and linear_extrude and put a hole in each end. The hole does not show when > I turn debug off. The first image shows with debug on. The second image > has debug off. With the third image I move the hole up just to show how > far > it actually goes into the shape. Any idea why the hole would not show with > debug off? > > <http://forum.openscad.org/file/n15327/shape_debug.png> > > <http://forum.openscad.org/file/n15327/shape_no_debug.png> > > <http://forum.openscad.org/file/n15327/shape_depth.png> > > > > -- > View this message in context: > http://forum.openscad.org/issue-with-difference-function-tp15327.html > Sent from the OpenSCAD mailing list archive at Nabble.com. > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

	union() {
		// Pin Holes		
		for (pin=[0:rows-1]) {
	        translate([-part_width-(pin_depth),

mirror([1,0,0]) 
	draw_vee_side(degrees, rows, part_width, height);

The only parameter I pass to linear_extrude is height. This is the code that draws the shape. module draw_vee_side(degrees, rows=4, part_width, height=part_height) { difference() { union() { linear_extrude(height=height) polygon(points=[ [0, 0], [part_width, vh], [part_width, vh+(rows*lane_width)], [0, (rows*lane_width)] ], paths=[[0, 1, 2, 3]]); } union() { // Pin Holes for (pin=[0:rows-1]) { translate([-part_width-(pin_depth), vh+(lane_width*pin)+(lane_width_half), height/2]) rotate([0, 90, 0]) draw_pin_hole(); } } } } module draw_vee(degrees=45, rows=4, part_width=i2m(1.5), rows=4, pegs=5, height=part_height) { draw_vee_side(degrees, rows, part_width, height); mirror([1,0,0]) draw_vee_side(degrees, rows, part_width, height); } draw_vee(); -- View this message in context: http://forum.openscad.org/issue-with-difference-function-tp15327p15329.html Sent from the OpenSCAD mailing list archive at Nabble.com.

             union() {
                     // Pin Holes
                     for (pin=[0:rows-1]) {
                     translate([-part_width-(pin_depth),

     mirror([1,0,0])
             draw_vee_side(degrees, rows, part_width, height);

You also need to set the convexity, try convexity = 5. On 24 December 2015 at 22:46, fractorr <fractorr@gmail.com> wrote: > The only parameter I pass to linear_extrude is height. > > This is the code that draws the shape. > > > module draw_vee_side(degrees, rows=4, part_width, height=part_height) { > difference() { > union() { > linear_extrude(height=height) > polygon(points=[ > [0, 0], > [part_width, vh], > [part_width, vh+(rows*lane_width)], > [0, (rows*lane_width)] > ], paths=[[0, 1, 2, 3]]); > } > > union() { > // Pin Holes > for (pin=[0:rows-1]) { > translate([-part_width-(pin_depth), > vh+(lane_width*pin)+(lane_width_half), height/2]) > rotate([0, 90, 0]) > draw_pin_hole(); > } > } > } > } > > > module draw_vee(degrees=45, rows=4, part_width=i2m(1.5), rows=4, pegs=5, > height=part_height) { > draw_vee_side(degrees, rows, part_width, height); > > mirror([1,0,0]) > draw_vee_side(degrees, rows, part_width, height); > } > > > draw_vee(); > > > > -- > View this message in context: > http://forum.openscad.org/issue-with-difference-function-tp15327p15329.html > Sent from the OpenSCAD mailing list archive at Nabble.com. > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

             union() {
                     // Pin Holes
                     for (pin=[0:rows-1]) {
                     translate([-part_width-(pin_depth),

     mirror([1,0,0])
             draw_vee_side(degrees, rows, part_width, height);

Actually, if you draw just one side you will see your bug. The holes are drilled in the opposite side of the V, so have no effect. On 24 December 2015 at 23:50, nop head <nop.head@gmail.com> wrote: > You also need to set the convexity, try convexity = 5. > > On 24 December 2015 at 22:46, fractorr <fractorr@gmail.com> wrote: > >> The only parameter I pass to linear_extrude is height. >> >> This is the code that draws the shape. >> >> >> module draw_vee_side(degrees, rows=4, part_width, height=part_height) { >> difference() { >> union() { >> linear_extrude(height=height) >> polygon(points=[ >> [0, 0], >> [part_width, vh], >> [part_width, >> vh+(rows*lane_width)], >> [0, (rows*lane_width)] >> ], paths=[[0, 1, 2, 3]]); >> } >> >> union() { >> // Pin Holes >> for (pin=[0:rows-1]) { >> translate([-part_width-(pin_depth), >> vh+(lane_width*pin)+(lane_width_half), height/2]) >> rotate([0, 90, 0]) >> draw_pin_hole(); >> } >> } >> } >> } >> >> >> module draw_vee(degrees=45, rows=4, part_width=i2m(1.5), rows=4, pegs=5, >> height=part_height) { >> draw_vee_side(degrees, rows, part_width, height); >> >> mirror([1,0,0]) >> draw_vee_side(degrees, rows, part_width, height); >> } >> >> >> draw_vee(); >> >> >> >> -- >> View this message in context: >> http://forum.openscad.org/issue-with-difference-function-tp15327p15329.html >> Sent from the OpenSCAD mailing list archive at Nabble.com. >> >> _______________________________________________ >> OpenSCAD mailing list >> Discuss@lists.openscad.org >> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >> > >

Thank you, that was the issue. I was drawing the holes on the wrong side, I thought I had checked that but I guess not. I can't believe it was something so silly. I will have to keep that in mind for other shapes. -- View this message in context: http://forum.openscad.org/issue-with-difference-function-tp15327p15334.html Sent from the OpenSCAD mailing list archive at Nabble.com.