High Quality Hatching

Description:

Hatching lines are often used in line illustrations to convey tone and texture of a surface. In this paper we present methods to generate hatching lines from polygonal meshes and render them in high quality either at interactive rates for on-screen display or for reproduction in print. Our approach is based on local curvature information that is integrated to form streamlines on the surface of the mesh. We use a new algorithm that provides an even distribution of these lines. A special processing of these streamlines ensures high quality line rendering for both intended output media later on. While the streamlines are generated in a pre-processing stage, hatching lines are rendered either for vector-based printer output or on-screen display, the latter allowing for interaction in terms of changing the view parameters or manipulating the entire line shading model at run-time using a virtual machine.

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Example vector graphic illustration embedded as an SVG file using only four colors and black.
The hatching creates the illusion of smooth shading.

Paper download:  (4.9 MB)

Demo:

• High Quality Hatching demo v0.01 (Win32, 5.6 MB)
• Models to be used with the demo (2.2 MB)

Additional material:

• slides of the presentation at Eurographics 2004 (PDF, 2.5MB)

Main Reference:

Other References:

This work was done at the Department of Simulation and Graphics at the University of Magdeburg, Germany.