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Lego fix #100

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7f21aa7
link examples improved , round added
UBaer21 Nov 6, 2021
7cbed99
eliminated z-fighting
UBaer21 Nov 6, 2021
ea5bd5a
fixed multiple
UBaer21 Nov 7, 2021
5c8c329
fix alignment issue bottom
UBaer21 Nov 8, 2021
e4a5468
formatting cleaned
UBaer21 Nov 8, 2021
1c78d00
tab indents cleared
UBaer21 Nov 8, 2021
502a93f
axles centered
UBaer21 Nov 8, 2021
4895598
fixed axle shape + hole
UBaer21 Nov 8, 2021
cdd7e0d
fixed round add examples x add module help
UBaer21 Nov 8, 2021
0ef32fc
switch calculation to existing variable
UBaer21 Nov 9, 2021
b2cd837
Removed name LEGO from examples
UBaer21 Nov 9, 2021
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311 changes: 200 additions & 111 deletions lego_compatibility.scad
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Original file line number Diff line number Diff line change
@@ -1,28 +1,36 @@
// This file is placed under the public domain

// from: http://www.thingiverse.com/thing:9512
// Author: nefercheprure

// Examples:
// standard LEGO 2x1 tile has no pin

// // Examples:
// // standard 4×2×1 brick solid_bottom
// block();
//
// // standard 2x1 brick 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
// // standard 2x1 brick flat has pin
// block(1,2,1/3,reinforcement=false,solid_bottom=true,center=false);
// // standard 2x1 brick has pin
// block(1,2,1,reinforcement=true);
// standard LEGO 2x1 brick without pin
// // standard 2x1 brick without pin
// block(1,2,1,reinforcement=false);
// standard LEGO 2x1x5 brick has no pin and has hollow knobs
// // standard 2x1x5 brick has no pin and has hollow knobs
// block(1,2,5,reinforcement=false,hollow_knob=true);
// // standard 2x2x1/3 brick round no solid bottom
// block(2,2,1/3,reinforcement=true,solid_bottom=false,round=true);
// // standard 1x1x1 brick round no solid bottom
// block(1,1,1,reinforcement=true,solid_bottom=false,round=true,center=1);



knob_diameter=4.8; //knobs on top of blocks
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
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;
Expand All @@ -31,127 +39,208 @@ cylinder_precision=0.5;

/* EXAMPLES:

block(2,1,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=true);
// 1×1
translate([0,-40,0])block(1,1,1,round=true,flat_top=false,hollow_knob=true,solid_bottom=false,center=false);
translate([10,-40,0])block(1,1,1/3,round=true,flat_top=true,hollow_knob=true,solid_bottom=false,center=false);
translate([20,-40,0])block(1,1,1,round=true,flat_top=true,hollow_knob=true,solid_bottom=false,center=false);
translate([30,-40,0])block(1,1,1/3,round=true,flat_top=false,hollow_knob=false,solid_bottom=false,center=false);
translate([40,-40,0])block(1,1,1/3,round=true,flat_top=false,hollow_knob=true,solid_bottom=false,center=false);

block(2,1,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=true, solid_bottom=true);

translate([50,-10,0])
block(1,2,1/3,axle_hole=false,circular_hole=true,reinforcement=false,hollow_knob=true,flat_top=true);
block(1,2,1/3,axle_hole=false,circular_hole=true,reinforcement=false,hollow_knob=true,flat_top=true, solid_bottom=true);


translate([10,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=true);
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=true, solid_bottom=true);
translate([30,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=false,flat_top=false);
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=false,flat_top=false, solid_bottom=true);
translate([50,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=false);
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=false, solid_bottom=true);
translate([70,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=false,reinforcement=true,hollow_knob=false,flat_top=true, solid_bottom=true,round=true);
translate([90,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=false,flat_top=false, solid_bottom=true,round=true);
translate([110,0,0])
block(2,2,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=true,flat_top=false, solid_bottom=false,round=true);

translate([0,20,0])
block(3,2,2/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=false);
block(3,2,2/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=false, solid_bottom=true);
translate([20,20,0])
block(3,2,1,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=false,flat_top=false);
block(3,2,1,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=false,flat_top=false, solid_bottom=true);
translate([40,20,0])
block(3,2,1/3,axle_hole=false,circular_hole=false,reinforcement=false,hollow_knob=false,flat_top=false);
block(3,2,1/3,axle_hole=false,circular_hole=false,reinforcement=false,hollow_knob=false,flat_top=false, solid_bottom=true);

translate([0,-10,0])
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=false,flat_top=false);
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=false,flat_top=false, solid_bottom=true);
translate([0,-20,0])
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=true,flat_top=false);
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=true,flat_top=false, solid_bottom=true);
translate([0,-30,0])
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=true,flat_top=true);
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=true,flat_top=true,solid_bottom=true);
//*/
echo("lego_compatibility.scad useable module: \nblock(width=2,length=4,height=1,\n axle_hole=false,\n reinforcement=false,\n hollow_knob=false,\n flat_top=false,\n circular_hole=false,\n solid_bottom=true,\n center=false,\n round=false\n);\n");
module block(width=2,length=4,height=1,axle_hole=false,reinforcement=false, hollow_knob=false, flat_top=false, circular_hole=false, solid_bottom=true, center=false,round=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: use cylinder if round
if (width == length && round == true ) translate([overall_length/2,overall_width/2])
linear_extrude(height*block_height,convexity=2)
circle(d=overall_length-.01,$fs=cylinder_precision,$fa=5);
else 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)
if(width == length && round == true ){
translate([overall_width/2,overall_length/2,-roof_thickness]) cylinder(block_height*height,d=overall_length-wall_thickness*2,$fs=cylinder_precision,$fa=5);
if(width == 1) translate([overall_width/2,overall_length/2,-roof_thickness]) cylinder(block_height/3,d=(overall_length-wall_thickness*2)/cos(180/8),$fn=8);
// place for knobs if >1
if(width > 1 || length >1) translate([wall_thickness,wall_thickness,-roof_thickness]) cube([overall_length-wall_thickness*2,overall_width-wall_thickness*2,block_height/3]);
}// end round
else translate([wall_thickness,wall_thickness,-roof_thickness]) cube([overall_length-wall_thickness*2,overall_width-wall_thickness*2,block_height*height]);

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);
}

// round 1x1 -> groove around bottom
if(round == true && width == 1 && length ==1 && !(height==1/3&&flat_top))translate([overall_length/2,overall_width/2])
rotate_extrude($fs=cylinder_precision,$fa=5)translate([overall_length/2,0])
square([overall_length-post_diameter,block_height/2-wall_thickness/2],true);

// 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(round)translate([overall_length/2,overall_width/2])
rotate_extrude($fs=cylinder_precision,$fa=5)translate([overall_length/2,0])square([wall_thickness*2/3,wall_thickness],true);
}
if (axle_hole==true)
if (width>1 && length>1)
for (ycount=[0:width-2])
for (xcount=[0:length-2])
translate([
knob_diameter/2+wall_thickness+knob_spacing/2+xcount*knob_spacing,
knob_diameter/2+wall_thickness+knob_spacing/2+ycount*knob_spacing,
solid_bottom?-.1:+block_height/3-roof_thickness
])
axle(height*block_height+roof_thickness/2);
// circular hole
if (circular_hole==true)
if (width>1 && length>1)
for (ycount=[0:width-2])
for (xcount=[0:length-2])
translate([
knob_diameter/2+wall_thickness+knob_spacing/2+xcount*knob_spacing,
knob_diameter/2+wall_thickness+knob_spacing/2+ycount*knob_spacing,
-roof_thickness/8
])
cylinder(r=axle_diameter/2, h=height*block_height+roof_thickness/4,$fs=cylinder_precision);

// cut knobs if round
if(round==true&&width==length)translate([overall_length/2,overall_width/2])rotate_extrude($fs=cylinder_precision,$fa=5)translate([overall_length/2,-1])square([20,height*block_height+10],false);
} // end difference line 81

if (reinforcement==true && width>1 && length>1)
difference() {
for (ycount=[0:width-2])
for (xcount=[0:length-2])
translate([
knob_diameter/2+wall_thickness+knob_spacing/2+xcount*knob_spacing,
knob_diameter/2+wall_thickness+knob_spacing/2+ycount*knob_spacing,
0])
reinforcement(height);
for (ycount=[0:width-2])
for (xcount=[0:length-2])
translate([
knob_diameter/2+wall_thickness+knob_spacing/2+xcount*knob_spacing,
knob_diameter/2+wall_thickness+knob_spacing/2+ycount*knob_spacing,
-roof_thickness/2])
cylinder(r=axle_diameter/2, h=height*block_height+roof_thickness, $fs=cylinder_precision,$fa=5);
}
// posts:
if (solid_bottom == false){
if (width>1 && length>1)
for (ycount=[0:width -2])
for (xcount=[0:length -2])translate([
knob_diameter/2+wall_thickness+knob_spacing/2+xcount*knob_spacing,
knob_diameter/2+wall_thickness+knob_spacing/2+ycount*knob_spacing,
0])
post(height,axle_hole,circular_hole);
}
if (reinforcement == true && width==1 && length!=1)
for (xcount=[0:length -2])
translate([
knob_diameter/2+wall_thickness+knob_spacing/2+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=[0:width -2])
translate([
overall_length/2,
knob_diameter/2+wall_thickness+knob_spacing/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 post(height,axle_hole,circular_hole) {
difference() {
cylinder(r=post_diameter/2, h=height*block_height-roof_thickness/2,$fs=cylinder_precision);
translate([0,0,-roof_thickness/2])
if(!axle_hole)cylinder(r=knob_diameter/2, h=height*block_height+roof_thickness/4,$fs=cylinder_precision);

if(axle_hole){
translate([0,0,-roof_thickness/4])axle(height*block_height+roof_thickness/2);
cylinder(r=axle_diameter/2, h=(block_height/3-roof_thickness)*2,center=true,$fs=cylinder_precision,$fa=5);
}
if(circular_hole)translate([0,0,-roof_thickness/4])cylinder(r=axle_diameter/2, h=height*block_height+roof_thickness/2,$fs=cylinder_precision,$fa=5);
}
}

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);
}
}
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);
}
assert(height);
translate([0,0,height/2-.01])
intersection(){
union(){
cube([axle_diameter,axle_spline_width,height],center=true);
cube([axle_spline_width,axle_diameter,height],center=true);
}
cylinder(r=axle_diameter/2, h=height,center=true,$fa=5,$fs=cylinder_precision);
}
}


//EOF