modeler

Monorepository holding a React library, and CLI tool for CSG modeling.

The math is provided by the @jscad/csg package, please see it for more details and to understand the features/limitations of the approach. 3D output is intended for WebGL display or for STL export.

modeler-csg

Main library, a custom React reconciler, designed to work with react-three-fiber and Three.js. Uses @jscad/csg under the hood.

Installation

npm install --save modeler-csg

Usage

const React = require("react");
const ReactDOM = require("react-dom");
const { Canvas } = require("react-three-fiber");
const { Model } = require("modeler-csg");

ReactDOM.render(
  <Canvas>
    <ambientLight color={0x888888} />
    <spotLight position={[0, 10, 10]} />

    <Model>
      <subtract>
        <cube />
        <sphere radius={1.3} />
      </subtract>
    </Model>
  </Canvas>,
  document.getElementById("root")
);

API

API follows (for the most part) @jscad/csg docs

Model

• <Model> props:
  • {children} - shapes and operations
  • modelMaterial - THREE material for the model (default MeshStandardMaterial({ roughness: 1.0, metalness: 0.0, color: 0x333333 }))
  • partsMaterial - THREE material for the parts (default MeshBasicMaterial({ wireframe: true, color: 0x888888 }))
  • showModel - true/false - show or hide model itself (default true)
  • showParts - true/false - show or hide parts that made the model (default false)

Shapes

• <sphere/> - props: center, radius, resolution
• <cube/> - props: center, radius
• <roundedCube/> - props: center, radius, roundradius, resolution
• <cylinder/> - props: start, end, radius, resolution
• <roundedCylinder/> - props: start, end, radius, resolution
• <ellipticCylinder/> - props: start, end, radius, radiusStart, radiusEnd, resolution

Each shape also supports a color prop that accepts [0..1, 0..1, 0..1] RGB values.

Operations

• <union>...</union>
• <subtract>...</subtract>
• <intersect>...</intersect>

modeler-cli

Helper utility for quick sketching.

Installation

npm install -g modeler-cli or npm install --save modler-cli for local usage

Usage

1. create a model.js file:

const React = require("react");
const { Model } = require("modeler-csg");

module.exports = () => (
  <Model>
    <subtract>
      <cube />
      <sphere radius={1.3} />
    </subtract>
  </Model>
);

2. run modeler-cli preview -m model.js

This will start local server on port 3000, and file watcher on the model.js file - any changes are live updated in the web app. The web app has a simple camera handler, and provides a grid (main grid lines are by 1cm, secondary grid lines by 1mm).

STL Export

modeler-cli additional can compile provided model file to STL offline: modler-cli export -m model.js -o model.stl.

CLI

• preview:
  • -m, --model - input model file
  • -p, --port - specify port
• export:
  • -m, --model - input model file
  • -o, --out - output STL file