From 7e351e154ddf79b8039c0b63796d2de78895064c Mon Sep 17 00:00:00 2001 From: Elmom Date: Wed, 11 Jan 2012 01:43:04 +0200 Subject: [PATCH] Added lego_compatibility.scad --- lego_compatibility.scad | 157 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 lego_compatibility.scad diff --git a/lego_compatibility.scad b/lego_compatibility.scad new file mode 100644 index 0000000..7b6a4bf --- /dev/null +++ b/lego_compatibility.scad @@ -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-roof_thickness/2],center=true); + rotate(v=[0,0,1],a=90) cube([reinforcing_width,knob_spacing+knob_diameter+wall_thickness/2,height*block_height-roof_thickness/2], 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); + } +} +