Priority Based Expressive Rendering Of 3D Lines

3D line rendering has been widely used in the research field of computer graphics and visualization, for example, the line drawing of 3D models, the rendering of DTI fibers, and the rendering of streamlines, in flow visualization. Comparing with other expression techniques,3D lines can directly express the character of nature things in a simple way. But the traditional 3D graphics rendering APIs, such as OpenGL and Direct3D, only support the basic function of the 3D line rendering. And without the consideration of the line placement in the final result, while rendering a massive 3D line data in a single, the traditional method can cause the visual clutter.In this thesis, we present a novel priority based expressive 3D lines rendering method. Based on the user specified priority of each lines and the interesting region specified by the user, our method can placement the 3D lines and generate a terse and satisfied result. Comparing with the previous work, our priority based expressive rendering method has the following contributions:1. A new placement strategy, which can remove the visual clutter by placement 3D lines after the projection.2. Users can specify their interesting regions in our system, and our method keeps as much lines as. possible in the interesting regions while simplify lines in the uninter-esting regions.3. We introduce Depth-Dependent Halos method to indicate the depth information of 3D lines, and present a fast and accurately line shading algorithm for the DTI fibers. and streamlines.4. Our method can preserve the coherence of the result while the viewpoint changed by users, and can reach the real-time performance of a normal size 3D line dataset. Our method has been applied to some different 3D line datasets, and achieves satisfied results. These results prove the universality of our method.