https://github.com/mikolalysenko/arcball

A simple library-agnostic arcball camera in Javascript
https://github.com/mikolalysenko/arcball

Last synced: about 2 months ago
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A simple library-agnostic arcball camera in Javascript

• Host: GitHub
• URL: https://github.com/mikolalysenko/arcball
• Owner: mikolalysenko
• License: mit
• Created: 2013-01-07T14:54:54.000Z (almost 12 years ago)
• Default Branch: master
• Last Pushed: 2013-05-14T00:11:00.000Z (over 11 years ago)
• Last Synced: 2024-10-20T14:26:51.543Z (2 months ago)
• Language: JavaScript
• Size: 109 KB
• Stars: 7
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
Arcball

=======

A simple library-agnostic arcball camera in Javascript

Installation

============

    npm install arcball

    

Example

=======

    var ArcballCamera = require('arcball').ArcballCamera;

    var camera = new ArcballCamera();

    // ... in mouse event handler

    camera.update(mouse_x, mouse_y, {

      rotate:   mouse_left_clicked,

      pan:      mouse_right_clicked,

      zoom:     mouse_middle_clicked

    });

    

    // ... in rendering loop

    var camera_matrix = camera.matrix();

API

===

## `ArcballCamera()`

The main camera object

### `ArcballCamera.update(mouse_x, mouse_y, flags)`

Updates the camera state using the mouse input.  `mouse_x` and `mouse_y` are the x/y coordinates of the mouse, `flags` is an object containing the boolean flags `rotate`, `pan`, and `zoom` which determine how to rotate the camera.

### `ArcballCamera.matrix()`

Returns a 4x4 homogeneous transformation matrix representing the position of the object relative to the arcball camera.

Acknowledgements

================

(c) 2013 Mikola Lysenko ([email protected]).  MIT License