lostcart / cardboardcanvas

Simple test of drawing 2D items in a 3D space for the Google Cardboard

Cardboard Canvas

Simple test of drawing 2D items in a 3D space for the Google Cardboard.

This project makes use of the canvas by drawing the same image on the left and right side of the screen slightly adjusted to give a 3D effect when used with the Google Cardboard.

Usage

To setup the Cardboard canvas you want to do something like this. The method takes in an integer for setting how much of a 3D effect is applied.

mCardboardCanvas = new CardboardCanvas(CardboardCanvas.DEPTH_SCALE_MOST);

And then in your draw method you want to refresh the cardboard canvas, add images and then draw the scene. When you add a bitmap you can set the depth value with a float, 0 is a close as possible, and 1 is the furthest possible

    @Override
    public void draw(Canvas canvas) {
   	    ...

   	    // Setup the cardboard canvas the first time draw is called
   	 	if (!mSetup) {
            mCardboardCanvas.setupCanvas(canvas);
            mSetup = true;
        }

        // Refresh the canvas each frame
        mCardboardCanvas.refreshCanvas(canvas);

        // Add the images to the cardboard canvas
        mCardboardCanvas.addBitmap(backBitmap, 0, 0, 1);
        mCardboardCanvas.addBitmap(closeBitmap, 0, 0, 0);

        // Draw the constructed scene
        mCardboardCanvas.draw();
        ...
    }