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We present an interface for 3D object manipulation in which standard transformation tools are replaced with transient 3D widgets invoked by sketching context-dependent strokes. The widgets are automatically aligned to axes and planes determined by the user’s stroke. Free-form 3D modeling has made a significant impact on the engineering, design, and entertainment industries. However, free-form modeling tools are not typically regarded as being easy to learn or use. 3D transformation widgets used in other systems. Translation widgets from 3DS Max [Aut07a] (a) and Blender [Ble07] (b), Rotation widget from XSI [Avi07] (c), and combo-widgets from Houdini [Sid07] (d), Modo [Lux07] (e), and Maya [Aut07b] (f,g). While the visual design varies, functionality is largely identical. Design Overview : We have two complementary goals. Primarily, we aim to integrate direct 3D manipulation control into a sketch-based free-form modeling system, using interaction styles compatible with the sketch-based interface philsophy. However, we also desire that our techniques be “competitive” with the 3D manipulation widgets found in existing tools. When re-designing an interface, it is critical to analyze it’s current use. In addition to discussing the problem with working 3D artists, we turned to the voluminous training video material available for 3D modeling software. Relative Manipulation, Three-dimensional manipulations such as translation and rotation are applied relative to some orthogonal coordinate frame centered at a specific point in space - the origin of the frame.

Tags : 3d widgets, object manipulation, interaction styles, transformation tools, complementary goals, design overview, 3d artists, modeling system, entertainment industries, modeling tools, modeling software, video material, houdini, 3ds max, engineering design

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