examples/cameras_trackball_orbit.html

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<div id="infoDark">
    <a href="http://scenejs.org">SceneJS</a> - orbiting camera using a <a
        href="../api/latest/plugins/node/cameras/trackball.js" target="_other">cameras/trackball</a> node<br>
    drag mouse to orbit
    <br>
    mouse wheel to zoom in and out
</div>

<script>

    //-----------------------------------------------------------------------------------------------------------------
    // Demo of the "cameras/trackball" node type, which uses quaternions to orbit the eye about a point of interest
    //-----------------------------------------------------------------------------------------------------------------

    // Point SceneJS to the bundled plugins
    SceneJS.setConfigs({
        pluginPath: "../api/latest/plugins"
    });

    // Create scene
    var scene = SceneJS.createScene({
        nodes: [

            // Mouse-quaternion-orbited camera using
            // implemented by plugin at http://scenejs.org/api/latest/plugins/node/cameras/trackball.js
            {
                type: "cameras/trackball",

                // Unique ID so we can access this node (see below)
                id: "myCamera",

                // Initial position
                eye: { x: 1000.0, y: 0.0, z: -1000.0 },
                look: { x: 0.0, y: 0.0, z: 0.0 },
                up: { y: 1.0 },

                // Initial zoom (default == 1.0)
                zoom: 0.7,

                // Sensitivity of mouse wheel zoom control
                zoomSensitivity: 0.01,

                // Orbiting the 'look' position (default)
                // otherwise we are orbiting the 'look' point.
                orbit: true,

                nodes: [

                    // Blue material
                    {
                        type: "material",
                        color: { r: 0.3, g: 0.3, b: 1.0 },

                        nodes: [

                            // City,implemented by plugin at:
                            // http://scenejs.org/api/latest/plugins/node/models/buildings/city.js
                            {
                                type: "models/buildings/city"
                            }
                        ]
                    }
                ]
            }
        ]
    });

    scene.getNode("myCamera",
            function (trackball) {

//                    trackball.setZoom(0.5);
//                    trackball.addPan([0.0, 0.0, 1.0]);
//                    trackball.addRotate([0.0, 1.0, 0.0, 0.5]);

            });

</script>
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