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