include include $fn = 36; rgn1 = [ square(100), move([50,50], p=circle(d=60)), [[35,35],[35,65],[65,65]] ]; rgn2 = [ [[0,0], [100,100], [100,0]], [[27,10], [90,73], [90,10]], move([70,30], p=circle(d=25)) ]; polycolor=[0.5,1,0.5]; outlinecolor="black"; module showit(label, rgn, poly=polycolor, outline=outlinecolor, width=0.5) { move([-50,-50]) { if(outline) color(outline) linear_extrude(height=max(0.1,1-width)) for(path=rgn) stroke(path, width=width, closed=true); if(poly) color(poly) linear_extrude(height=0.1) region(rgn); color("black") right(50) fwd(7) linear_extrude(height=0.1) text(text=label, size=8, halign="center", valign="center"); } } ydistribute(-125) { xdistribute(120) { showit("Region A", rgn1, poly=[1,0,0,0.5]); showit("Region B", rgn2, poly=[0,0,1,0.5]); union() { showit("A and B Overlaid", rgn1, poly=[1,0,0,0.5]); showit("", rgn2, poly=[0,0,1,0.5]); } } xdistribute(120) { showit("Union A+B", union(rgn1, rgn2)); showit("Difference A-B", difference(rgn1, rgn2)); showit("Intersection A&B", intersection(rgn1, rgn2)); showit("Exclusive OR A^B", exclusive_or(rgn1, rgn2)); } } // vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap