Ao
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Ao is a programmatic CAD tool where solid models are defined as Scheme scripts using functional representations (f-rep). Unlike traditional CAD tools such as OpenSCAD, Ao exposes the geometry kernel entirely to the user — primitive shapes are just lambda functions, making the system fully transparent and homoiconic. It embeds GNU Guile for scripting, supports a live 3D viewport, and exports to heightmap PNGs and STL meshes using dual contouring for sharp edges. Blog posts cover JIT compilation of shape functions, affine coordinate optimization, and automatic bounding box derivation.
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