• Parametric Design
• 3D
• Operations

Operations

Align

After creating multiple objects, align allows you to align an array of objects:

const shapes = [
  cube({center: [0, 0, 10]}),
  cube({center: [0, 10, 20]}),
  cube({center: [10, 0, 30]})
];

const alignedShapes = align(
  {
    modes: ['center', 'max', 'none'], // align along axis: center, min, max, none
    realtiveTo: [0,0,0]
  },
  shapes
);

Boolean Operations

const {union, subtract, intersect, scission} = jscad.booleans;

Union

Combines an array of geometries into one new geometry:

const shapes = [
  cube({size: 4}),
  sphere({radius: 2, center: [2, 2, 2]})
];
const unionShape = union(shapes);
return unionShape;

Subtract

Cut out shapes from the first shape in the list:

const shapes = [
  cube({size: 4}),
  sphere({radius: 2, center: [2, 2, 2]})
];
const subtractShape = subtract(shapes);
return subtractShape;

Intersect

The overlapping areas of the object in the array:

const shapes = [
  cube({size: 4}),
  sphere({radius: 2, center: [2, 2, 2]})
];
const intersectShape = intersect(shapes);
return intersectShape;

Scission

Scission can cut elements apart that are not connected anymore. This requires that there is at least a little gap inbetween two elements. If one for example would use subtract on two shapes in both directions and afterwards union. The cut would be so perfect, that the edges would still touch. Here is an example where the shapes are translated before union is applied, thereby, creating a big gap:

const cubeShape = cube({size: 4});
const sphereShape = sphere({radius: 2, center: [2, 2, 2]});

const cut1 = subtract([cubeShape, sphereShape]);
const cut2 = subtract([sphereShape, cubeShape]);
const unionShape = union([
  translate([0,0,0], cut1),
  translate([0,0,5], cut2)
]);

const scissionShapes = scission(unionShape);

The above scission returns an array with two elements, which are the object that went into the union command.

Inspiration: Raspberry Pi Case

Based on the mechanical drawings of the Raspberry Pi, particularly the screw holes, this case is constructed. Using variables the size can be easily modified.

Open "Raspi Case"

View on GitHub/lectures/3d/case

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