SIGGRAPH '86 Proceedings of the 13th annual conference on Computer graphics and interactive techniques
Briar: a constraint-based drawing program
CHI '92 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
SKETCH: an interface for sketching 3D scenes
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Interactive beautification: a technique for rapid geometric design
Proceedings of the 10th annual ACM symposium on User interface software and technology
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
Integrated manipulation: context-aware manipulation of 2D diagrams
Proceedings of the 12th annual ACM symposium on User interface software and technology
HCC '01 Proceedings of the IEEE 2001 Symposia on Human Centric Computing Languages and Environments (HCC'01)
Lineogrammer: creating diagrams by drawing
Proceedings of the 21st annual ACM symposium on User interface software and technology
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Indirect and unintuitive commands like mode-switching are difficult operations for many users. In this paper, we describe a new simple interface for a 2D drawing system to lessen user's confusion. Firstly, we propose a direct manipulation interface based on a set of geometric primitives and their geometric relationships. Secondly, we present a seamless drawing interface that users do not need to switch modes by clicking the toolbar. Through user tests using our prototypes and a standard commercial application, we confirmed that our system can complete certain drawing tasks with shorter completion time and less number of commands.