Stefan Maierhofer

CG

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Computer Graphics

International Conference on Shape Modelling and Applications 2002
Banff, Alberta, Canada
17-22 May 2002
A Multiresolution Mesh Generation Approach for Procedural Definition of Complex Geometry

Abstract

As a general approach to procedural mesh definition we propose two mechanisms for mesh modification: generalized subdivision and rule based mesh growing. In standard subdivision, a specific subdivision rule is applied to a mesh to get a succession of meshes converging to a limit surface. A generalized approach allows different subdivision rules at each level of the subdivision process. By limiting the variations introduced at each level, convergence can be ensured; however in a number of cases it may be of advantage to exploit the expressivity of different subdivision steps at each level, without imposing any limits. Rule based mesh growing is an extension of L-systems to not only work on symbols, but connected symbols, representing faces in a mesh. This mechanism allows the controlled introduction of more complex geometry in places where it is needed to model fine details. Using both these mechanisms in combination we demonstrate, that a great variety of complex objects can be easily modeled and compactly represented.

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Images


ridges on a forking branch


different kinds of cacti

 


branch with a dense foliage


wrought iron candle holder with rust stains

Dissertation, 2002
Rule-Based Mesh Growing and Generalized Subdivision Meshes

Abstract

As a general approach to procedural mesh definition, two mechanisms for mesh modification are proposed: generalized subdivision meshes and rule-based mesh growing ...

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Talk, October 2001
Rule-Based Mesh Growing

Description

Presented at the Institute of Computer Graphics in Vienna.

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HTML

Software
ART - Advanced Rendering Toolkit

Description

ART is a modular, portable, open-source rendering package being developed at the Institute of Computer Graphics in Vienna.
All images on this site (unless otherwise noted) have been rendered using ART.

Links

www.artoolkit.org

Technical Report, 2001
Creation of Realistic Plants Using Semi-Automatic Parameter Extraction From Photographs

Abstract

A new semi-automatic method for determining parameters for L-based plant modeling systems is introduced. It is shown that many of the parameters necessary to create realistic plants can be extracted semi-automatically from photographs of real plants. By replacing numerical parameters with a more intuitive set of graphical modeling primitives, it is possible to significantly speed up the design process of complex three-dimensional shapes, such as plants. We also explain how to add small scale detail and natural transitions to skeletal models of plants to further improve the design process.

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pdf

Images


photograph


rendered image


photograph


rendered image

Unrealistic shadows in the rendered image stem from using point light sources as opposed to the photographed image where THE ultimate global illumination algorithm has been applied ;-)

CESCG 2000
A Flexible Framework for Volume Tracing

Links

paper (html)
CESCG 2000

Masters Thesis, 1999
A Flexible Framework for Volume Tracing

Abstract

This work discusses the simulation of light interacting with participating media and presents a flexible framework which allows for the incorporation of a wide variety of different volume rendering methods.

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pdf

Images


participating media


region boundary surfaces

This page is maintained by Stefan Maierhofer. It was last updated on June 14, 2002.