J
jpmendes
Sat, Mar 12, 2016 12:35 AM
Hello
I intend to use frequently the module ring() in the code below because it is
much faster than the difference() between cylinders or even ring2(). However
some anomalies happen in preview mode like those in the first picture.
After rendering, the results of test1() and test2() are OK. Using the slower
ring2() all goes well except that I miss the facility of using the option
SidesIn and SidesOut useful to generate nuts and bolts.
My problem is speed because I'm attaching a set of parts with lots of bolts
nuts and washers.
Can someone explain why this happens?
Preview:
http://forum.openscad.org/file/n16425/Capture1.jpg
After rendering:
http://forum.openscad.org/file/n16425/Capture2.jpg
Now the code:
DSides=48;
delta=0.01;
module tsl (x,y=0,z=0) {translate([x,y,z]) children();}
module rot (x,y=0,z=0) {rotate([x,y,z]) children();}
module ring(pos=[0,0,0], angl=[0,0,0], Hgt, Dout, Din, SidesOut, SidesIn)
{
translate(pos) rotate(angl)
linear_extrude(height=Hgt){
difference(){
circle( d=Dout, $fn=SidesOut);
circle( d=Din, $fn=SidesIn);
}
}
}
module ring2(pos=[0,0,0], angl=[0,0,0], Hgt, Dout, Din, Sides, Sector) //
"ring()" is faster
{
translate(pos) rotate(angl)
rotate_extrude(angle=Sector, convexity=2, $fn=DSides )
translate([Din/2,0,0])
square([(Dout-Din)/2,Hgt]);
}
module test1(){
difference(){
union(){
tsl(0, 0, 7.6) cylinder(h=5.9+7.6+7.6, d=14, $fn=DSides);
tsl(0, 0, 5.9+7.6+7.4) cylinder(h=20.6, d=16, $fn=DSides);
}
tsl(0,0,7.5) cylinder(h=19, d1=12, d2=7, $fn=DSides);
tsl(0,0,5.9+7.6+7.4+20.6-11) cylinder(h=11+delta, d=8, $fn=DSides);
tsl(-10, 7, 5.9+7.6+7.4+3.8) cube([20, 3, 8]);
tsl(-10, -7-3, 5.9+7.6+7.4+3.8) cube([20, 3, 8]);
}
}
module test2(){ //using ring()
tsl(30,0,0){
difference(){
union(){
tsl(0, 0, 7.6) cylinder(h=5.9+7.6+7.6, d=14, $fn=DSides);
//ring2([0, 0, 5.9+7.6+7.4], [0,0,0], 20.6, 16, 8, DSides);
ring([0, 0, 5.9+7.6+7.4], [0,0,0], 20.6, 16, 8, DSides, DSides, 80);
}
// All the following lines are problematic with preview
tsl(0,0,7.5) cylinder(h=19, d1=12, d2=7, $fn=DSides);
tsl(0,0,5.9+7.6+7.4+20.6-11) cylinder(h=11+delta, d=8, $fn=DSides);
tsl(-10, 7, 5.9+7.6+7.4+3.8) cube([20, 3, 8]);
tsl(-10, -7-3, 5.9+7.6+7.4+3.8) cube([20, 3, 8]);
}
}
}
test1();
test2();
Thanks
jpmendes
--
View this message in context: http://forum.openscad.org/Can-someone-explain-this-strange-behaviour-with-preview-tp16425.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
Hello
I intend to use frequently the module ring() in the code below because it is
much faster than the difference() between cylinders or even ring2(). However
some anomalies happen in preview mode like those in the first picture.
After rendering, the results of test1() and test2() are OK. Using the slower
ring2() all goes well except that I miss the facility of using the option
SidesIn and SidesOut useful to generate nuts and bolts.
My problem is speed because I'm attaching a set of parts with lots of bolts
nuts and washers.
Can someone explain why this happens?
Preview:
<http://forum.openscad.org/file/n16425/Capture1.jpg>
After rendering:
<http://forum.openscad.org/file/n16425/Capture2.jpg>
Now the code:
DSides=48;
delta=0.01;
module tsl (x,y=0,z=0) {translate([x,y,z]) children();}
module rot (x,y=0,z=0) {rotate([x,y,z]) children();}
module ring(pos=[0,0,0], angl=[0,0,0], Hgt, Dout, Din, SidesOut, SidesIn)
{
translate(pos) rotate(angl)
linear_extrude(height=Hgt){
difference(){
circle( d=Dout, $fn=SidesOut);
circle( d=Din, $fn=SidesIn);
}
}
}
module ring2(pos=[0,0,0], angl=[0,0,0], Hgt, Dout, Din, Sides, Sector) //
"ring()" is faster
{
translate(pos) rotate(angl)
rotate_extrude(angle=Sector, convexity=2, $fn=DSides )
translate([Din/2,0,0])
square([(Dout-Din)/2,Hgt]);
}
module test1(){
difference(){
union(){
tsl(0, 0, 7.6) cylinder(h=5.9+7.6+7.6, d=14, $fn=DSides);
tsl(0, 0, 5.9+7.6+7.4) cylinder(h=20.6, d=16, $fn=DSides);
}
tsl(0,0,7.5) cylinder(h=19, d1=12, d2=7, $fn=DSides);
tsl(0,0,5.9+7.6+7.4+20.6-11) cylinder(h=11+delta, d=8, $fn=DSides);
tsl(-10, 7, 5.9+7.6+7.4+3.8) cube([20, 3, 8]);
tsl(-10, -7-3, 5.9+7.6+7.4+3.8) cube([20, 3, 8]);
}
}
module test2(){ //using ring()
tsl(30,0,0){
difference(){
union(){
tsl(0, 0, 7.6) cylinder(h=5.9+7.6+7.6, d=14, $fn=DSides);
//ring2([0, 0, 5.9+7.6+7.4], [0,0,0], 20.6, 16, 8, DSides);
ring([0, 0, 5.9+7.6+7.4], [0,0,0], 20.6, 16, 8, DSides, DSides, 80);
}
// All the following lines are problematic with preview
tsl(0,0,7.5) cylinder(h=19, d1=12, d2=7, $fn=DSides);
tsl(0,0,5.9+7.6+7.4+20.6-11) cylinder(h=11+delta, d=8, $fn=DSides);
tsl(-10, 7, 5.9+7.6+7.4+3.8) cube([20, 3, 8]);
tsl(-10, -7-3, 5.9+7.6+7.4+3.8) cube([20, 3, 8]);
}
}
}
test1();
test2();
Thanks
jpmendes
--
View this message in context: http://forum.openscad.org/Can-someone-explain-this-strange-behaviour-with-preview-tp16425.html
Sent from the OpenSCAD mailing list archive at Nabble.com.
