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Revision as of 20:36, 7 November 2009 (edit) AndrewPlumb (Talk | contribs) ← Previous diff		Current revision (20:53, 7 November 2009) (edit) AndrewPlumb (Talk | contribs)
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	== Variable Declarations ==		== Variable Declarations ==
-	Variables are defined using '''<name>''' '''=''' '''<value>'''' ''';''' syntax.	+	Variables are defined using '''<name>''' '''=''' '''<value>''' ''';''' syntax.
-	my_variable = 10;	+	overlap = 10;
		+
		+	== Module Declarations ==
		+
		+	Modules with no arguments:
		+
		+	module peg()
		+	{
		+	union() {
		+	translate([0,0,320-overlap]) cylinder(h=180+overlap, r=245, center=false);
		+	cylinder(h=320, r=245+55, center=false);
		+	}
		+	}
		+	module thread_hole()
		+	{
		+	translate([0,0,-overlap]) cylinder(h=180+320+2*overlap, r=100, center=false);
		+	}
		+
		+
		+	A module with one argument:
		+
		+	module peg_hole(shift_bottom=200)
		+	{
		+	translate([0,0,-overlap]) union() {
		+	cylinder(h=180+320+2*overlap, r=150, center=false);
		+	translate([0,0,overlap-1+shift_bottom])
		+	cylinder(h=250+1, r1=250+1, r2=0, center=false);
		+	cylinder(h=overlap+shift_bottom, r=250, center=false);
		+	}
		+	}
		+
		+	Module declarations can contain sub-module declarations:
		+
		+	module disc_button()
		+	{
		+	module bottom_disc_threadholes(shift_middle=5)
		+	{
		+	union() {
		+	translate([0,0,200+shift_middle]) cylinder(h=130+shift_middle,r=500,center=false);
		+	translate([400,0,0]) thread_hole();
		+	translate([-400,0,0]) thread_hole();
		+	translate([0,400,0]) thread_hole();
		+	translate([0,-400,0]) thread_hole();
		+	}
		+	}
		+	module bottom_disc()
		+	{
		+	difference() {
		+	cylinder(h=320, r=800, center=false);
		+	bottom_disc_threadholes(shift_middle=0);
		+	}
		+	translate([400, 400, 0])
		+	peg();
		+	translate([400, -400, 0])
		+	peg();
		+	translate([-400, -400, 0])
		+	peg();
		+	translate([-400, 400, 0])
		+	peg();
		+	}
		+	module bottom_disc_holes()
		+	{
		+	translate([400, 400, 0])
		+	peg_hole(shift_bottom=180+overlap);
		+	translate([400, -400, 0])
		+	peg_hole(shift_bottom=180+overlap);
		+	translate([-400, -400, 0])
		+	peg_hole(shift_bottom=180+overlap);
		+	translate([-400, 400, 0])
		+	peg_hole(shift_bottom=180+overlap);
		+	}
		+	difference() {
		+	bottom_disc();
		+	bottom_disc_holes();
		+	}
		+	}
		+
		+	Modules are called/instantiated:
		+
		+	disc_button();
		+
		+	== Primitive Shapes ==
		+
		+	=== Cylinders and Cones ===
		+
		+	Simple cylinder; origin at center:
		+
		+	cylinder(h=100, r=10);
		+
		+	Simple cylinder; origin at h=0 end:
		+
		+	cylinder(h=100, r=10, center=false);
		+
		+	Tapered cylinder:
		+
		+	cylinder(h=100, r1=10, r2=20, center=false);
		+
		+	Cone (degenerate tapered cylinder case):
		+
		+	cylinder(h=100, r1=10, r2=0, center=false);

---

Current revision

Contents 1 Using OpenSCAD 2 Syntax 2.1 Comments 2.2 Variable Declarations 2.3 Module Declarations 2.4 Primitive Shapes 2.4.1 Cylinders and Cones

Using OpenSCAD

This page is to hold my notes on using OpenSCAD.

Syntax

Comments

Comments are escaped with the // character prefix.

// This is a comment

Variable Declarations

Variables are defined using <name> = <value> ; syntax.

overlap = 10;

Module Declarations

Modules with no arguments:

module peg()
{
	union() {
		translate([0,0,320-overlap]) cylinder(h=180+overlap, r=245, center=false);
		cylinder(h=320, r=245+55, center=false);
	}
}
module thread_hole()
{
	translate([0,0,-overlap]) cylinder(h=180+320+2*overlap, r=100, center=false);
}

A module with one argument:

module peg_hole(shift_bottom=200)
{
	translate([0,0,-overlap]) union() {
		cylinder(h=180+320+2*overlap, r=150, center=false);
		translate([0,0,overlap-1+shift_bottom])
			cylinder(h=250+1, r1=250+1, r2=0, center=false);
		cylinder(h=overlap+shift_bottom, r=250, center=false);
	}
}

Module declarations can contain sub-module declarations:

module disc_button()
{
	module bottom_disc_threadholes(shift_middle=5)
	{
		union() {
		translate([0,0,200+shift_middle]) cylinder(h=130+shift_middle,r=500,center=false);
		translate([400,0,0]) thread_hole();
		translate([-400,0,0]) thread_hole();
		translate([0,400,0]) thread_hole();
		translate([0,-400,0]) thread_hole();
		}
	}
	module bottom_disc()
	{
		difference() {
			cylinder(h=320, r=800, center=false);
			bottom_disc_threadholes(shift_middle=0);
		}
		translate([400, 400, 0])
			peg();
		translate([400, -400, 0])
			peg();
		translate([-400, -400, 0])
			peg();
		translate([-400, 400, 0])
			peg();
	}
	module bottom_disc_holes()
	{
		translate([400, 400, 0])
			peg_hole(shift_bottom=180+overlap);
		translate([400, -400, 0])
			peg_hole(shift_bottom=180+overlap);
		translate([-400, -400, 0])
			peg_hole(shift_bottom=180+overlap);
		translate([-400, 400, 0])
			peg_hole(shift_bottom=180+overlap);
	}
	difference() {
		bottom_disc();
		bottom_disc_holes();
	}
}

Modules are called/instantiated:

disc_button();

Primitive Shapes

Cylinders and Cones

Simple cylinder; origin at center:

cylinder(h=100, r=10);

Simple cylinder; origin at h=0 end:

cylinder(h=100, r=10, center=false);

Tapered cylinder:

cylinder(h=100, r1=10, r2=20, center=false);

Cone (degenerate tapered cylinder case):

cylinder(h=100, r1=10, r2=0, center=false);