examples/canvas_capture_customSize.html

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<div id="infoDark">
    <a href="http://scenejs.org">SceneJS</a> - canvas capture at custom size every 100ms<br><br>
</div>


<!-- Canvas containing our scene -->
<canvas id="mySceneCanvas" width="600px" height="600px"></canvas>

<!-- Image element displaying the captured image -->
<img id="myCapturedImage" width="400px" height="400px"/>

<script>

    // Demonstrates the 'canvas/capture' node, which is implemented by plugin in
    // http://scenejs.org/api/latest/plugins/node/canvas/capture.js
    //
    // This example periodically makes the node capture the scene canvas
    // and copy the captured image data to an image element.
    //
    // We've set up an external canvas for our scene, instead of relying on
    // the scene to provide it's own default canvas, because we want to
    // arrange the canvas and image beside each other in the page.
    //

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

    // Create scene containing our capture node
    var scene = SceneJS.createScene({

        // Link to our canvas element
        canvasId:"mySceneCanvas",

        nodes:[

            // Mouse-orbited camera, implemented by plugin at
            // http://scenejs.org/api/latest/plugins/node/cameras/orbit.js
            {
                type:"cameras/orbit",
                yaw:30,
                pitch:-30,
                zoom:500,
                zoomSensitivity:10.0,
                spin: 0.1, // Slowly spin

                nodes:[

                    // City, implemented by plugin at
                    // http://scenejs.org/api/latest/plugins/node/models/buildings/city.js
                    {
                        type:"models/buildings/city",
                        width:600
                    }
                ]
            },

            // The capture node, implemented by plugin at
            // http://scenejs.org/api/latest/plugins/node/canvas/capture.js
            {
                type:"canvas/capture",
                id:"myCanvasCapture",
                width: 400,
                height: 400
            }
        ]
    });

    //--------------------------------------------------------
    // Periodically capture the canvas to the image element
    //--------------------------------------------------------

    var imageElement = document.getElementById("myCapturedImage");

    // Get the 'canvas/capture' node instance
    scene.getNode("myCanvasCapture",
            function (myCanvasCapture) {

                // Subscribe to the image it captures
                // and copy it to the image element
                myCanvasCapture.on("image",
                        function (data) {
                            imageElement.src = data.src;
                        });

                // Do a screen capture every two seconds
                setInterval(function () {
                    myCanvasCapture.capture({

                        // These capture params can also be set on the node
                        // definition. They will override those when specified here

                        format:"jpeg",  // Default - also supports "png" and "bmp"
                        width:600, // Defaults to current canvas width
                        height:600 // Defaults to current canvas height
                    });
                }, 100);
            });

</script>
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