Andreas Siess

Illustrations for my computer graphics lectures

Illustrations and figures for my lectures in 3D computer graphics

In the summer semester of 2019 I was honored to be in charge of the lectures in the field of computer graphics at the Karlsruhe University of Applied Sciences. In order to be able to show my students certain aspects of 3D modelling, I have created a large number of illustrations and graphics. I share these graphics here for free use. Maybe they are helpful for one or the other lecturer.

Important: I will update this page gradually. At the moment this wild repository is still quite a chaos. I hope I will find some time during the summer holidays to clean something up here and there and bring some structure into it.

CSG – Constructive Solid Geometry

Overview over some 3D primitives for CSG
Illustration how CSG modelling works
Different variations of Boole operations in 3D space
Problems with Boole operations: Mesh quality suffers
CSG-Intersections, destroying texture/rendering/viewport

Voxel- and Volume-Modelling

Voxel resolution – effects on polygonal mesh
Volume modelling vs. CSG-Boole (Polygonal modelling)

Polygon-Modelling

Triangles vs. Quads vs. n-Gons

Spline & Bézier based Modelling

linear & cubic spline comparison
Bézier and B-spline comparison
Bézier Modifier – usage for polygon-modelling
from spline to 3D-model: lathe object
complicated meshes via simple splines: loft object
Hyper-NURBs (subdivision surface): comparison of quads vs. triangles

Meta-Balls

Meta-Balls: Combination of spheres and splines
Meta-Balls: easy organic models with geometric primitives

– – – Update 18-06-2019 – – –

Gouraud Shading

Illustration of Gouraud algorithm

Caustics

Caustics demo: Glass and semi-opaque object with Fresnel

Rendering

Comparison Rasterization (biased render) vs. Raytracing (unbiased render)
Mudbox Render vs. Full Rendering: Importance of materials for realistic results
Examples of Sketch and Toon Renderings