2D-3D Seamless Design Environment for Creative Work

我们以前开发了一个原型系统称为“哥斯拉”，支持创意设计，特别是汽车外观设计师。Godzilla提供了一个环境，设计师可以在2D pad（带LCD的桌子）上绘制概念图像，当他们将图像保持在半空中时，2D草图的形状被自动识别，并显示为3D pad（立体视觉电视）上显示的3D草图。设计人员可以从二维或三维的不同视点绘制草图、修改和查看图纸。3D图像不是以美丽的CG图像显示，而是以3D草图的形式显示，这些草图由许多3D草书线组成，这些草书线是模仿设计师的笔触而产生的。虽然Godzilla在汽车制造商的试用中获得了成功，但它存在严重的缺点：（1）可设计的形状限于汽车的形状，（2）2D和3D视区分离，以及（3）设备昂贵。我们现在已经扩展了Godzilla以克服这些缺点：（1）使用七个图元的组合可以进行自由形式的设计，（2）在2D和3D空间之间无缝呈现，以及（3）使用现成的设备。我们设计了一种识别技术，使用拓扑矩阵和实现了一个用户界面，用于转换和操纵识别的图元。两个初步的实验证明了该系统的有效性。

We previously developed a prototype system called "Godzilla" that supports creative design, specifically by car-exterior designers. Godzilla provides an environment in which designers can draw concept image on a 2D pad (a table with an LCD), and when they hold the image in midair, the shape of the 2D sketch is automatically recognized and appears as a 3D sketch displayed on a 3D pad (stereovision TVs). Designers can sketch, modify, and view their drawings from different viewpoints in either two or three dimensions. The 3D images are not displayed as beautiful CG images, but as 3D sketches that consist of many 3D cursive lines produced by mimicking the designer's pen touch.Although Godzilla was successfully used on a trial basis at an automobile manufacturer, it has serious drawbacks : (1) the designable shapes are limited to those of cars, (2) the 2D and 3D view areas are separated, and (3) the equipment is expensive. We have now extended Godzilla to overcome these drawback : (1) free form design is possible using a combination of seven primitives, (2) presentation is seamless between the 2D and 3D spaces, and (3) off-the-shelf equipment is used. We devised a recognition technique that uses a topology matrix and implemented a user interface for transforming and manipulating the recognized primitives. Two preliminary experiments demonstrated the effectiveness of the system.