Fncad: Cad editor, like openscad but sdf

Basic Syntax

• var x = 42;
• module name() {}
• if (x > 0) {}
• for(var i = [1:10]) {}
• [1, 2, 3]

Operators

• + - * /
• < <= > >= == !=
• && || !
• vector[number]

Basic Shapes

• sphere(radius);
• cube(size);
• smooth_cube(size, radius=0.1);
• cylinder(radius, height);
• cone(radius, height);

SDF Operators

Specify a signed distance function manually:

• sdf(face(
    sqrt(sqr(x) + sqr(y) + sqr(z)) - 2,
  0.1))

Expressions:

• x, y, z - coordinates of current point
• a + b, a - b, a * b, a / b, -a, sqrt(a), sqr(a), abs(a), sin(a), cos(a), exp(a), log(a), min(a, b), max(a, b), atan2(a, b), smooth_union(a, b, r)
• face(expr, size) - Continuous surface for expr, minimum tri size size. Every discontinuity in the SDF surface should be marked by a face.

Transformations

• translate([x,y,z]) {}
• rotate([x,y,z]) {}
• scale([x,y,z]) {}

Boolean Operations

• union() {}
• intersection() {}
• difference() {}
• smooth_union(r, detail=200%) {}
• smooth_intersection(r, detail=200%) {}
• smooth_difference(r, detail=200%) {}
• detail(size=0.1) {} - Set minimum feature size
• shell(thickness) {} - Create a hollow shell

Keyboard Shortcuts

• Tab - Indent code
• Shift+Tab - Unindent code
• Esc then Tab - Move focus out of editor (for screenreaders)
• Ctrl+5 - Generate mesh
• Esc - Return to preview

Example