TU Wien:Computergraphik VO (Wimmer)/Prüfungsfragen SS23

Prüfung 1

I did the strategy where I just explained a lot once the professor asked a question. Hence everything has an "Explain" bullet point.

• Scene graph
  • Explain
  • Tree/graph of things in the scene, such as models, lights and cameras
  • Each model has a mesh and a shader
• Sampling
  • Explain
  • Convolution, convolution theorem $f*g=invFT(FT(f)\cdot FT(g))$, with * being the convolution
  • Mention that the convolution theorem works independently of the spatial and frequency domains
• Aliasing
  • Explain
  • Band limiting
• Texture Mapping
  • Explain
  • And also mention aliasing
• Bezier Curves
  • Explain
  • Properties
  • The Castle Algorithm (definitely what it's called)
• Subdivision surfaces (Catmull Clark)
  • Smooths meshes by adding vertices at the edges, forming new triangles. And then recompute the already existing vertices.
  • Disadvantage being that hard edges are gone afterwards.

Prüfung 2

Mostly explain the different concepts while highlighting their advantages and disadvantages.

• Procedural Modelling
  • L-Systems
  • Shape Grammars
  • Terrain
    • Three ways for generating terrain meshes (random, world-data, simulation)
• Data structures (for each: idea, operations, advantages, disadvantages)
  • Wire-frame Model
  • B-Rep
  • Winged Edge
• Textures
  • Why Textures
  • Parametrization
  • Perspective Correctness
  • Bump Mapping
  • Parallax Mapping