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Viewpoint Selection by Painting

Complex 3D models are very time-consuming to render, and it is difficult to achieve the desired viewpoint for them using interactive methods such as virtual trackballs. This paper presents an intuitive method for computing good camera positions through a simple painting interface. Given a 3D scene, the user simply paints the region of interest (ROI) on the 2D screen, and the camera is repositioned to pan in on it. Since the computation uses depth buffers, it is independent of the complexity of the model; this makes it efficient for viewing complicated 3D models. Here, we also demonstrate several applications in 3D painting, sketching and light placement.