TAILIEUCHUNG - CAD tools for aesthetic engineering

Laser hair removal focuses on the endogenous chromophore melanin, which is mainly found in the hair shaft, with a small amount present in the upper third of the follicular epithelium (Figure 1). When an appropriate energy source (such as a laser) is directed at the skin, light is primarily absorbed in the hair shaft melanin. Heat is generated and diffuses to the surrounding follicular epithelium. A similar principle applies to laser treatment of vascular lesions, where the heat generated after absorption by hemoglobin is transferred from the blood to the vascular endothelial cells. . | COMPUTER-AIDED DESIGN ELSEVIER Computer-Aided Design 37 2005 737-750 locate cad CAD tools for aesthetic engineering Carlo H. Sequin EECS Computer Science Division University of California 639 Soda Hall 1776 Berkeley CA 94720-1776 USA Accepted 28 August 2004 Abstract The role of computers and of computer-aided design tools for the creation of geometrical shapes that will be judged primarily by aesthetic considerations is reviewed. Examples are the procedural generation of abstract geometrical sculpture or the shape optimization of constrained curves and surfaces with some global cost functional. Different possibilities for such beauty functionals are discussed. Moreover rapid prototyping tools based on layered manufacturing now add a new dimension to the visualization of emerging designs. Finally true interactivity of the CAD tools allows a more effective exploration of larger parts of the design space and can thereby result in an actual amplification of the creative process. 2004 Elsevier Ltd. All rights reserved. Keywords Shape optimization Geometrical sculpture Sculpture generator Rapid prototyping 1. Introduction In this tutorial we are concerned with computer-aided design tasks in which the final evaluation is mostly based on aesthetic criteria. While most engineers accept the fact that one needs to use computers to design jet engines computer chips or large institutional buildings it is less clear whether computers are also useful in the design of artifacts that are judged mostly by their looks. In a traditional CAD setting the computer primarily serves as a precise drafting and visualization tool permitting the designer to view the emerging geometry from different angles and in different projections. A digital representation also makes it possible to carry out some analytical tasks such as determining volume or surface area of a part. We will show that today the role of the computer goes much further. It actively supports the creation of .

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