In the design industry, profile drawings are typically sketched from various perspectives and combined in some sort of CAD system to build a digital representation of a 3D model. Limited virtual systems are available for this sketching process, as the current interfaces for manipulating curves typically use a standard point cursor to indirectly adjust curve parameters. Furthermore, limited functionality is available for allowing artists to integrate their profile sketches into a 3D environment, allowing them to survey the model as they design it from multiple viewpoints. In this thesis we will describe the design and implementation of interaction techniques for the creation, manipulation, and integration of curves in 3D environments. The systems which we present have been demonstrated to various users, from colleagues to professional artists, and user feedback is reported.
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