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GPU Gems 3 by Hubert Nguyen

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Chapter 34. Signed Distance Fields Using Single-Pass GPU Scan Conversion of Tetrahedra

Kenny Erleben University of Copenhagen

Henrik Dohlmann 3Dfacto R&D

Introduction

In this chapter we address the practicalities in computing a signed distance field. We present a method that accelerates the computation by using graphics hardware. Our method is simple to implement and offers a trade-off between performance and quality.

Overview of Signed Distance Fields

A signed distance field is represented as a grid sampling of the closest distance to the surface of an object represented as a polygonal model. Usually the convention of using negative values inside the object and positive values outside the object is applied. Signed distance fields are very attractive ...

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