I3D '92 Proceedings of the 1992 symposium on Interactive 3D graphics
ARCBALL: a user interface for specifying three-dimensional orientation using a mouse
Proceedings of the conference on Graphics interface '92
Communications of the ACM
Fluid integration of rotation and translation
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Rotation and Translation Mechanisms for Tabletop Interaction
TABLETOP '06 Proceedings of the First IEEE International Workshop on Horizontal Interactive Human-Computer Systems
Shallow-depth 3d interaction: design and evaluation of one-, two- and three-touch techniques
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
User-defined gestures for surface computing
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Proceedings of Graphics Interface 2009
Separability of spatial manipulations in multi-touch interfaces
Proceedings of Graphics Interface 2009
A screen-space formulation for 2D and 3D direct manipulation
Proceedings of the 22nd annual ACM symposium on User interface software and technology
Simulating grasping behavior on an imaging interactive surface
Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces
Sticky tools: full 6DOF force-based interaction for multi-touch tables
Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces
The effect of DOF separation in 3D manipulation tasks with multi-touch displays
Proceedings of the 17th ACM Symposium on Virtual Reality Software and Technology
tBox: a 3d transformation widget designed for touch-screens
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
The design and evaluation of 3D positioning techniques for multi-touch displays
3DUI '10 Proceedings of the 2010 IEEE Symposium on 3D User Interfaces
Using sketches and retrieval to create LEGO models
SBM'08 Proceedings of the Fifth Eurographics conference on Sketch-Based Interfaces and Modeling
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Presently, multi-touch interactive surfaces have widespread adoption as entertainment devices. Taking advantage of such devices, we present an interactive LEGO application, developed accordingly to an adaptation of building block metaphors and direct multi-touch manipulation. Our solution (LTouchIt) allows users to create 3D models on a tabletop surface. To prove the validity of our approach, we compared LTouchIt with two LEGO applications, conducting a user study with 20 participants. The results suggest that our touch-based application can compete with existing mouse-based applications. It provides users with a hands-on experience, which we believe to be more adequate for entertainment purposes.