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A system for spatial drawing must have a display device that shows stereoscopic images to the user, a controller serving as a brush for drawing, and a function that creates a line and a curved surface and visualizes the virtual space. Herein, a software framework was designed for spatial drawing by analyzing the functions for spatial drawing applications in a virtual environment based on existing studies and produced a virtual reality spatial drawing application with virtual drawing tools. The application employed a traditional painting metaphor. Furthermore, a brush module and a palette module were designed for the spatial drawing interface and linked to the line and surface generator modules to change drawing attributes, e.g., color and texture.

The purposed of this research is to develop multimedia content usage analysis service platform. In the proposed platform, the content gazing behaviors of the users are monitored and profiled in real-time and a set of quantifiable metrics is provided. These