87 lines
2.2 KiB
OpenSCAD
87 lines
2.2 KiB
OpenSCAD
/*
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* circle
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*
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*
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* Functions:
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* libcircle_quarter and its alias libcircle_14
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* libcircle_half and its alias libcircle_24 and libcircle_12
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* libcircle_threequarter and its alias libcircle_34
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*
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* All functions take either r (radius) or d (diameter) as argument.
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* If both are given (for whatever reason you'd do this), radius is chosen over diameter.
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* Same applies for libcircle_degrees, however you also need to pass this module
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* the "degrees" argument which is pretty self-explanatory.
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*/
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$fn = 36;
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module libcircle_14(r=0, d=0) {
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libcircle_quarter(r, d);
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}
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module libcircle_quarter(r=0, d=0) {
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diameter = __diameter_radius_conversion(r, d);
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intersection() {
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circle(d=diameter);
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square([radius, radius]);
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}
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}
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module libcircle_24(r=0, d=0) {
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libcircle_half(r, d);
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}
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module libcircle_12(r=0, d=0) {
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libcircle_half(r, d);
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}
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module libcircle_half(r=0, d=0) {
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diameter = __diameter_radius_conversion(r, d);
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intersection() {
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circle(d=diameter);
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translate([0, -diameter, 0])
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square([diameter, diameter*2]);
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}
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}
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module libcircle_34(r=0, d=0) {
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libcircle_threequarter(r, d);
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}
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module libcircle_threequarter(r=0, d=0) {
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diameter = __diameter_radius_conversion(r, d);
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difference() {
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circle(d=diameter);
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translate([-diameter, 0, 0])
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square([diameter, diameter]);
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}
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}
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module libcircle_degrees(r=0, d=0, degrees) {
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diameter = __diameter_radius_conversion(r, d);
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degrees = degrees % 360;
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if(degrees > 180) {
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__half_circle_degrees(diameter, 180);
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rotate([0, 0, 180])
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__half_circle_degrees(diameter, degrees-180);
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} else {
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__half_circle_degrees(diameter, degrees);
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}
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}
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module __half_circle_degrees(diameter, degrees) {
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// This is the most dirty hack I've pulled in a while.
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// But... Who cares? #sorrynotsorry ;)
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difference() {
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libcircle_half(d=diameter);
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rotate([0, 0, degrees])
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translate([0, -diameter/2])
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square([diameter/2, diameter]);
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}
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}
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// https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/General#Scope_of_variables
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// let's work our way around this... ;(
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function __diameter_radius_conversion(r=0, d=0) = (r > 0) ? r*2 : d;
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