• simple programmatic 3D solid geometry
• representations for points, polylines, polygons, and meshes
• simple IR for describing operations and is good destination for programming languages

• geode
• gui
• portaudio, portmidi, opencv

• cad.*: cad operations written directly against geode
• geom.*: wrapper around geode reps to be dynamic allow polymorphic construction
• read-eval.*: IR interpreter that read strings into and evals geoms
• app.*: gui front end and viewer

• 1D

cad "[[-5,5],[5,5],[5,-5]]"

cad "[[[-5,5,-5],[-5,-5,0],[5,-5,0],[5,5,0]]]"

cad "[[[-5,-5],[5,-5]],[[5,5],[-5,5]]]"

cad 'letter("A")'

cad 'text("0123456789")'

• 2D

cad "square(2)"

cad "circle(2)"

cad "square(2) \ square(1)"

cad "poly([-2,-2],[-1,0],[-2,2],[0,1],[2,2],[1,0],[2,-2],[0,-1])"

cad "poly([[-2,-2],[-1,0],[-2,2],[0,1],[2,2],[1,0],[2,-2],[0,-1]])"

cad "hull(square(5) | circle(6))"

• 3D

cad "sphere(2.6)"

cad "cube(2)"

cad "xrot(15,cube(2))"

cad "(xrot(15,cube(2)) | yrot(15,cube(2)) | zrot(15,cube(2)) | cube(2)) \ sphere(2.6)"

cad "((sphere(8) | extrude(20,circle(2))) \ sphere(7)) \ extrude(21,circle(1))"

cad "hull(revolve(xmov(4, circle(4))) | extrude(20, square(2)))"

cad "offset(3, cube(1))"

cad "hollow(1, cube(4))"

• 1D -> 2D

cad 'mag1(4,thicken(0.1,letter("A")))'

cad 'mag1(4,offset(0.1,letter("A")))'

• 1D -> 3D

cad "thicken(1,[[-5,5,-5],[-5,-5,0],[5,-5,0],[5,5,0]])"

• 2D -> 3D

cad "extrude(16,square(2) \ square(1))"

cad 'extrude(2,mag1(4,thicken(0.1,letter("A"))))'

cad 'extrude(2,mag1(4,offset(0.1,letter("A"))))'

cad 'extrude(2,mag1(2,thicken(0.05,text("0123456789"))))'

cad 'extrude(2,mag1(2,offset(0.05,text("0123456789"))))'

cad "revolve(xmov(6,poly([-2,-2],[-1,0],[-2,2],[0,1],[2,2],[1,0],[2,-2],[0,-1])))"

cad "revolve(xmov(4,poly([-1,-1],[1,-1],[0,1])))"

cad "revolve(xmov(8,circle(4)))"

cad "revolve(xmov(4,square(2) \ square(1)))"

• 3D -> 2D

cad 'slice(0,sphere(4) \ cube(2))'

cad "slice(0,revolve(xmov(4,square(2) \ square(1))))"

• auto specification of resolution for spheres, offset etc
• SVG reading/writing
• colors
• 3D mesh shadow instead of slice
• 3D->3D revolve/extrude