Canvas Drawing Application

This is a React-based canvas drawing application that allows users to draw various shapes, such as lines, rectangles, and circles, on a fullscreen canvas. The application also includes features for selecting and erasing shapes, as well as exporting the drawing as an SVG file.

DEMO: https://bertyhell.github.io/openwebcad

Features

• Fullscreen canvas with a black background
• Drawing tools: Line, Rectangle, Circle, measurements
• Zoom and pan
• Eraser tool to delete segments
• Undo and redo
• Choose angle guides
• Draw with snap points for
  • endpoints
  • midpoints
  • intersections
  • circle centers
  • circle quadrants
• Selection tool to highlight and modify shapes
  • Use CTRL to toggle selection
  • Use shift to add to the current selection
  • drag left, to select by intersecting
  • drag right, to select by containing
• Move
• Rotate
• Scale
• Align shapes to each other
• Array copy linear
• Array copy radial
• Import images into the drawing
• Import SVG files
• Export to PDF
• Export drawing as an SVG file
• Export drawing as an PNG file
• Save and load drawings from/to json files
• Select line color and thickness
• Eraser tool to delete segments

Possible future feature ideas (TODO) in order of likelihood

• Eraser tool to delete segments
  • Max distance to delete
• Layers for drawing shapes in different layers that can be toggled on or off
• Mirror
• Offset
• Add text
• Ellipses
• Regular polygons (pentagon, hexagon, etc)
• Combine lines into a polygon
• Explode polygons into lines
• Polygon circumference
• Polygon area
• Chamfer, Round corners
• Draw with snap points for
  • circle tangents
  • nearest point on line
  • prioritize certain snap points over others (eg: midpoint over nearest)
• Edit existing lines and circles by dragging endpoints/middle points
• Hatching and fill areas
• gradient fills
• Import DXF files
• Import DWG files
• Export to DWG
• Export to DXF
• Export drawing to ASCII code

Maintenance

• replace react with webcomponents (Lit)

Technologies Used

• TypeScript
• JavaScript
• React
• NPM
• HTML canvas
• SVG
• SCSS
• Tailwind CSS

Demo

Visit https://bertyhell.github.io/openwebcad

Installation

1. Clone the repository:

   git clone <repository-url>
   cd <repository-directory>

2. Install dependencies:

   npm install

Usage

Start the development server: sh npm dev

Open your browser and navigate to http://localhost:5173

Development

Available Scripts

• npm dev: Runs the app in development mode.
• npm run build: Builds the app for production.
• npm preview: Runs the production build in a local server.

Project Structure

• src/: Contains the source code of the application.
• docs/: Contains the github pages site.
• public/: Contains assets that need to be accessible from the url. Like favicon.

Contributing

Contributions are welcome! Please open an issue or submit a pull request for any changes.

License

This project is licensed under the MIT License.