Compile looks perfect but Render indicates simple no
I've carefully examined all my polygons on "thrown together" and zoomed in as
far as I could to see if there were any gaps or missing polygons, but they
all seem pretty solid and I still can't export the project to STL. As far as
I can tell, only two edges are touching on any given side of a polygon. Is
there a complexity limit?
//KNURL DIMENSIONS (USER-SPECIFIED)
rez = 100;
knurlsides = 1/16;
knurlprotrusion = 1/32;
knurlshigh = 31;
topdiameter = 1.4;
middlediameter =1.275;
bottomdiameter = 1.15;
conelength = 1;
unit=25.4;
//CONVERSION
ks = knurlsidesunit;
kp = knurlprotrusionunit;
kh = knurlshigh * ks;
tr = topdiameterunit/2; //to radius
mr = middlediameterunit/2; //to radius
br = bottomdiameterunit/2; //to radius
cl = conelengthunit;
rad=(ks*rez)/PI/2;
opp1=sin(360/rez)rad;
adj1=cos(360/rez)rad;
opp2=sin(360/rez/2)(rad+kp);
adj2=cos(360/rez/2)(rad+kp);
opp3=sin(360/rez)*tr;
adj3=cos(360/rez)*tr;
opp4=sin(360/rez)*mr;
adj4=cos(360/rez)*mr;
opp5=sin(360/rez)*br;
adj5=cos(360/rez)*br;
//START OF KNURL CODE
module knob(){
//produces 1 pyramid
module knurl(){
polyhedron(
points=[[rad,0,0],[adj1,opp1,0],[adj1,opp1,ks],[rad,0,ks],[adj2,opp2,ks/2]],
faces=[[0,4,1],[1,4,2],[2,4,3],[3,4,0]]);}
//produces a "slice" of the cylinder (good tool for viewing a cross
section)
module oneside(){
for(i=[0:(knurlshigh - 1)]){
translate([0,0,ks*i])knurl();}
polyhedron(
points=[
[rad,0,0],[adj1,opp1,0], //bottom outside
[br,0,0],[adj5,opp5,0], //bottom inside
[mr,0,cl],[adj4,opp4,cl], //middle (narrow)
[tr,0,cl],[adj3,opp3,cl], //middle (wide)
[tr,0,kh],[adj3,opp3,kh], //top inside
[rad,0,kh],[adj1,opp1,kh],], //top outside
faces=[
[0,1,2],[1,3,2], //bottom
[2,3,4],[3,5,4], //bottom inside
[4,5,6],[5,7,6], //middle shelf
[6,7,8],[7,9,8], //top inside
[8,9,10],[9,11,10], //top
]);}
module build(){
for(i=[1:rez]){
rotate([0,0,(360/rez)*i])oneside();}
}
build();
}
knob();
--
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On 12/21/2014 02:38 AM, widgetmaker wrote:
I've carefully examined all my polygons on "thrown together" and zoomed in as
far as I could to see if there were any gaps or missing polygons, but they
all seem pretty solid and I still can't export the project to STL. As far as
I can tell, only two edges are touching on any given side of a polygon. Is
there a complexity limit?
Looking at the STL in blender shows a large amount of non-manifold edges.
I'm not yet sure where those are coming from.
ciao,
Torsten.
I think the reason it doesn't work is the polyhedrons have missing faces,
so are not manifold, so not a valid objects for CSG ops, the implicit union
in this case.
I think if you close them so they are actually polyhedrons it will work.
On 21 December 2014 at 01:47, Torsten Paul Torsten.Paul@gmx.de wrote:
On 12/21/2014 02:38 AM, widgetmaker wrote:
I've carefully examined all my polygons on "thrown together" and zoomed
in as
far as I could to see if there were any gaps or missing polygons, but they
all seem pretty solid and I still can't export the project to STL. As far
as
I can tell, only two edges are touching on any given side of a polygon. Is
there a complexity limit?
Looking at the STL in blender shows a large amount of non-manifold edges.
I'm not yet sure where those are coming from.
ciao,
Torsten.
OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
I closed the pyramid polygon, then completely closed the "pie slice" and that
appears to have fixed the issue. Apparently you can't make a watertight
object from open polyhedrons, no matter how precisely their edges meet.
--
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