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Merge branch 'master' of github.com:openscad/MCAD

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Marius Kintel 2012-02-02 23:32:34 +01:00
parent 0a5b38fe7c 2ad18d2a48
commit cde0d5514a
5 changed files with 215 additions and 25 deletions
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157
lego_compatibility.scad Normal file
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@ -0,0 +1,157 @@
// This file is placed under the public domain
// from: http://www.thingiverse.com/thing:9512
// EXAMPLES:
// standard LEGO 2x1 tile has no pin
// block(1,2,1/3,reinforcement=false,flat_top=true);
// standard LEGO 2x1 flat has pin
// block(1,2,1/3,reinforcement=true);
// standard LEGO 2x1 brick has pin
// block(1,2,1,reinforcement=true);
// standard LEGO 2x1 brick without pin
// block(1,2,1,reinforcement=false);
// standard LEGO 2x1x5 brick has no pin and has hollow knobs
// block(1,2,5,reinforcement=false,hollow_knob=true);
knob_diameter=4.8; //knobs on top of blocks
knob_height=2;
knob_spacing=8.0;
wall_thickness=1.45;
roof_thickness=1.05;
block_height=9.5;
pin_diameter=3; //pin for bottom blocks with width or length of 1
post_diameter=6.5;
reinforcing_width=1.5;
axle_spline_width=2.0;
axle_diameter=5;
cylinder_precision=0.5;
/* EXAMPLES:
block(2,1,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=true);
translate([50,-10,0])
block(1,2,1/3,axle_hole=false,circular_hole=true,reinforcement=false,hollow_knob=true,flat_top=true);
translate([10,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=true);
translate([30,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=false,flat_top=false);
translate([50,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=false);
translate([0,20,0])
block(3,2,2/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=false);
translate([20,20,0])
block(3,2,1,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=false,flat_top=false);
translate([40,20,0])
block(3,2,1/3,axle_hole=false,circular_hole=false,reinforcement=false,hollow_knob=false,flat_top=false);
translate([0,-10,0])
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=false,flat_top=false);
translate([0,-20,0])
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=true,flat_top=false);
translate([0,-30,0])
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=true,flat_top=true);
//*/
module block(width,length,height,axle_hole=false,reinforcement=false, hollow_knob=false, flat_top=false, circular_hole=false, solid_bottom=true, center=false) {
overall_length=(length-1)*knob_spacing+knob_diameter+wall_thickness*2;
overall_width=(width-1)*knob_spacing+knob_diameter+wall_thickness*2;
center= center==true ? 1 : 0;
translate(center*[-overall_length/2, -overall_width/2, 0])
union() {
difference() {
union() {
// body:
cube([overall_length,overall_width,height*block_height]);
// knobs:
if (flat_top != true)
translate([knob_diameter/2+wall_thickness,knob_diameter/2+wall_thickness,0])
for (ycount=[0:width-1])
for (xcount=[0:length-1]) {
translate([xcount*knob_spacing,ycount*knob_spacing,0])
difference() {
cylinder(r=knob_diameter/2,h=block_height*height+knob_height,$fs=cylinder_precision);
if (hollow_knob==true)
translate([0,0,-roof_thickness])
cylinder(r=pin_diameter/2,h=block_height*height+knob_height+2*roof_thickness,$fs=cylinder_precision);
}
}
}
// hollow bottom:
if (solid_bottom == false)
translate([wall_thickness,wall_thickness,-roof_thickness]) cube([overall_length-wall_thickness*2,overall_width-wall_thickness*2,block_height*height]);
// flat_top -> groove around bottom
if (flat_top == true) {
translate([-wall_thickness/2,-wall_thickness*2/3,-wall_thickness/2])
cube([overall_length+wall_thickness,wall_thickness,wall_thickness]);
translate([-wall_thickness/2,overall_width-wall_thickness/3,-wall_thickness/2])
cube([overall_length+wall_thickness,wall_thickness,wall_thickness]);
translate([-wall_thickness*2/3,-wall_thickness/2,-wall_thickness/2])
cube([wall_thickness,overall_width+wall_thickness,wall_thickness]);
translate([overall_length-wall_thickness/3,0,-wall_thickness/2])
cube([wall_thickness,overall_width+wall_thickness,wall_thickness]);
}
if (axle_hole==true)
if (width>1 && length>1) for (ycount=[1:width-1])
for (xcount=[1:length-1])
translate([xcount*knob_spacing,ycount*knob_spacing,roof_thickness]) axle(height);
if (circular_hole==true)
if (width>1 && length>1) for (ycount=[1:width-1])
for (xcount=[1:length-1])
translate([xcount*knob_spacing,ycount*knob_spacing,roof_thickness])
cylinder(r=knob_diameter/2, h=height*block_height+roof_thickness/4,$fs=cylinder_precision);
}
if (reinforcement==true && width>1 && length>1)
difference() {
for (ycount=[1:width-1])
for (xcount=[1:length-1])
translate([xcount*knob_spacing,ycount*knob_spacing,0]) reinforcement(height);
for (ycount=[1:width-1])
for (xcount=[1:length-1])
translate([xcount*knob_spacing,ycount*knob_spacing,-roof_thickness/2]) cylinder(r=knob_diameter/2, h=height*block_height+roof_thickness, $fs=cylinder_precision);
}
// posts:
if (solid_bottom == false)
if (width>1 && length>1) for (ycount=[1:width-1])
for (xcount=[1:length-1])
translate([xcount*knob_spacing,ycount*knob_spacing,0]) post(height);
if (reinforcement == true && width==1 && length!=1)
for (xcount=[1:length-1])
translate([xcount*knob_spacing,overall_width/2,0]) cylinder(r=pin_diameter/2,h=block_height*height,$fs=cylinder_precision);
if (reinforcement == true && length==1 && width!=1)
for (ycount=[1:width-1])
translate([overall_length/2,ycount*knob_spacing,0]) cylinder(r=pin_diameter/2,h=block_height*height,$fs=cylinder_precision);
}
}
module post(height) {
difference() {
cylinder(r=post_diameter/2, h=height*block_height-roof_thickness/2,$fs=cylinder_precision);
translate([0,0,-roof_thickness/2])
cylinder(r=knob_diameter/2, h=height*block_height+roof_thickness/4,$fs=cylinder_precision);
}
}
module reinforcement(height) {
union() {
translate([0,0,height*block_height/2]) union() {
cube([reinforcing_width,knob_spacing+knob_diameter+wall_thickness/2,height*block_height],center=true);
rotate(v=[0,0,1],a=90) cube([reinforcing_width,knob_spacing+knob_diameter+wall_thickness/2,height*block_height], center=true);
}
}
}
module axle(height) {
translate([0,0,height*block_height/2]) union() {
cube([axle_diameter,axle_spline_width,height*block_height],center=true);
cube([axle_spline_width,axle_diameter,height*block_height],center=true);
}
}

29
multiply.scad Normal file
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/*
* Multiplication along certain curves
*
* Copyright by Elmo Mäntynen, 2012.
* Licenced under LGPL2 or later
*/
include <units.scad>
use <utilities.scad>
// TODO check that the axis parameter works as intended
// Duplicate everything $no of times around an $axis, for $angle/360 rounds
module spin(no, angle=360, axis=Z){
for (i = [1:no]){
rotate(normalized_axis(axis)*angle*no/i) union(){
for (i = [0 : $children-1]) child(i);
}
}
}
//Doesn't work currently
module duplicate(axis=Z) spin(no=2, axis=axis) child(0);
module linear_multiply(no, separation, axis=Z){
for (i = [0:no-1]){
translate(i*separation*axis) child(0);
}
}

7
regular_shapes.scad
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@ -76,6 +76,13 @@ module dodecagon(radius)
reg_polygon(12,radius);
}
module ring(inside_diameter, thickness){
difference(){
circle(r=(inside_diameter+thickness*2)/2);
circle(r=inside_diameter/2);
}
}
module ellipse(width, height) {
scale([1, height/width, 1]) circle(r=width/2);
}

5
units.scad
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@ -10,8 +10,13 @@ mm = 1;
cm = 10 * mm;
dm = 100 * mm;
m = 1000 * mm;
inch = 25.4 * mm;
X = [1, 0, 0];
Y = [0, 1, 0];
Z = [0, 0, 1];
M3 = 3*mm;
M4 = 4*mm;
M5 = 5*mm;

14
utilities.scad
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@ -15,7 +15,9 @@ function length2(a) = sqrt( a[0]*a[0] + a[1]*a[1] );
function normalized(a) = a / (max(distance([0,0,0], a), 0.00001));
function normalized_axis(a) = a == "x" ? [1, 0, 0]:
a == "y" ? [0, 1, 0]:
a == "z" ? [0, 0, 1]: normalized(a);
function angleOfNormalizedVector(n) = [0, -atan2(n[2], length2([n[0], n[1]])), atan2(n[1], n[0]) ];
@ -23,16 +25,6 @@ function angle(v) = angleOfNormalizedVector(normalized(v));
function angleBetweenTwoPoints(a, b) = angle(normalized(b-a));
// TODO check that the axis parameter works as intended
// Duplicate everything $no of times around an $axis, for $angle/360 rounds
module spin(no, angle=360, axis=[0, 0, 1]){
for (i = [0:no]){
rotate(normalized(axis)*angle*i/no) union(){
for (i = [0 : $children-1]) child(i);
}
}
}
CENTER = 0;
LEFT = -0.5;