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# Advanced Computer Graphics

## What you Need to Pass

• Attend lessons. One missed +0 points. 2 missed 0 points, 3 missed 0 points, 4 and more is Fx.
• Project and exercise (mandatory, 10+50 points).
• Solve all homework problems (mandatory each one >=30%, 10 points)
• Pass final term (mandatory, 20 points) You will need to solve several problems discussed during lessons.
• Pass oral/written exam: (mandatory, +20 points)
• Summary
• Attendance = 0 or -100 (Fx)
• Exercise = +50..0
• Bonus = +10..0 (optional)
• Homework = +10..4 or +4..0 (Fx)
• Final term = +20..0
• Oral/written exam = +20..0
```   A = 92-100
B = 84-91
C = 76-83
D = 68-75
E = 60-67
Fx = 0-59
```
• VIEW RESULTS
• Final Term by Mooddle Electronic test 18.5.2015 8:10 in M-I)
• Before the test exam you can try to solve many tests from the graphics page, is you can pass the example test then you have big chance to pass the test exam.
• Schedule
• Mon (8:10) - Room M-XI (lecture)
• Str (9:30) - Room I-H3 (seminar)

### Lecture00 "Introduction to Computer Graphics"

• Computer Graphics Applications

### Lecture01 "Graphics Pipeline"

• What is The Graphics Pipeline
• Primitive Assembly
• Geometry Postprocessing and Rasterization
• Frame Buffer Operations
• http://www.lighthouse3d.com/tutorials/glsl-core-tutorial/pipeline33/
• Lecture notes: lesson00.pdf [1]
• Štátnicová téma: Zobrazovací kanál. Grafická pipeline moderného hardvéru, framebuffer, buffer objekty, používané súradnicové priestory, druhy shader programov, druhy optimalizačných techník (view frustum, occlusion, backface culling), príklad shader programov.

### Lecture04 "Ray Tracing 3."

• Ray Tracing Acceleration
• Data structure: grids, BVH, Kd-tree, Directional Partitioning
• Dynamic Scenes
• Beam and Cone Tracing
• Packet Tracing
• Lecture notes: lesson02.pdf
• Poznámky v Slovenčine k téme Dátové Štruktúry a Kd-tree.
• Štátnicová téma: Kanál metódy sledovania lúča a porovnanie s Radiosity metódou. (definícia lúča, definícia tieňového lúča, popis metódy sledovania lúča, generovanie lúča, pochod po lúči (ray traversal), prienik lúča s trojuholníkom, stromová štruktúra lúčov (ray tree) a jej použitie na výpočet lokálnej farby, problém presnosti priesečníkov). Metóda sledovania lúča na GPU, urýchľovacie techniky.

### Lecture05 "Light Trasport."

• Physics behind ray tracing
• Physical light quantities
• Visual perception of light
• Light sources
• Light transport simulation: Rendering Equation
• Lecture notes: lesson05.pdf
• Štátnicová téma: Fyzikálny osvetlovací model a výpočet farieb renderovacou rovnicou. (definícia radiancie, definícia BRDF a jej vlastnosti, fyzikálne BRDF Cook-Tarrance, definícia priestorového uhlu, napíšte renderovaciu rovnicu a vysvetlite jej členy).

• Diffuse reflectance function
• Radiative equilibrium between emission and absorption, escape
• System of linear equations
• Iterative solution Neuman series
• Lecture notes: lesson05.pdf

### Lecture07 "BRDF."

• Bidirectional Reflectance Distribution Function (BRDF)
• Reflection models
• Projection onto spherical basis functions
• Shading Phong model, Blin-Phong model
• Lecture notes: lesson07.pdf
• Homework:
• 1. Prove that the specular BRDF from slides less07 fulfills the BRDF properties: reciprocity, energy conservation, definit space, value space of BRDF
• 2. Derive the equation for reflected direction Omega_r from shading document.
• Physical BRDF
• Ward Reflection Model
• Cook-Torrance model
• Lecture notes: lesson07Phys.pdf

### Lecture08, Lecture09 "Shadows."

• Lecture notes: lesson08.pdf
• Štátnicová téma: Tiene, typy tieňov (mäkké, tvrdé, statické, dynamické), typy a popis algoritmov (projekčné, tieňové objemy, tieňové mapy (shadow mapping)), spôsoby implementácie jednotlivých algoritmov, artefakty a ich odstraňovanie, príklad shader programov pre tieňové mapy. Artefakty spôsobené diskretizáciou. Tiene vo Phongovom modeli.

### Lecture10 "Texturing 1, 2."

• Texture parameterization
• Procedural methods
• Procedural textures
• Fractal landscapes
• Lecture notes: lesson09.pdf
• Book chapter (Surface reality techniques): lessonBoook09.pdf
• Štátnicová téma: Lokálne osvetľovacie modely. (tieňovanie, Phongov a Blinn-Phongov osvetlovací model, zložky (ambientna, difúzna, zrkadlová), textúrovanie a druhy textúr, mapovanie a filtrácia textúr, popísať princípy environment, bump, normal mapovania, textúrovací a tangenciálny priestor, príklad shader programov na GPU.

### Lecture11 "Image Based Rendering 1."

• Plenopticfunction
• Panoramas
• Concentric Mosaics
• Light Field Rendering
• The Lumigraph
• Lecture notes: lesson10.pdf
• Homework: Blinn-Phong enumeration.

### Lecture12 "Image Based Rendering 2."

• Layered Depth Images
• View-dependent Texture Mapping
• Surface Light Fields
• View Morphing
• Lecture notes: lesson10.pdf

### Lecture13 "Ask me anything."

• Test problem introduction

# Seminars on Advanced Computer Graphics

## Rules / Info

• On every seminar we will implement selected problems/algorithms related to lessons. We will usually - not necessary start with a prearranged template downloadable from this site.
• For programming we will use language C# and Visual C# 2010 as a development environment. Alternatively, you can use MonoDevelop (Linux / Mac OSX) on your own machine.
• Attendance at seminars is optional but recommended.
• Seminars are conducted by
• Schedule of seminars is
• Monday (16:30) - Room F1-248

## Homeworks

• You can get max 100% per homework. Submission after a deadline is for 0%.
• There is a min 60% of your final evaluation required for admission to final term.
• Additional activity can be awarded by max 10% of your final evaluation.
• Don't cheat - create instead. Any kind of cheating is punished by withholding 30% of your final evaluation for all involved students.
• For a homework, you will finish the tasks started on the exercises. Assignment and template will be downloadable from this site. See exercises.

## Exercises

### Exercise00 "Vectors and Matrices"

Asignment: Create a simple application for vectors(4x1) and matrices(4x4). Use struct properties, function and/or operators. Create a calculator, check your equations and results. Add implementation to theese files in folder ./Mathematics/ : Vector4.cs, MathEx.cs (if you have a courage, try also Matrix44.cs)

For help, view this reminder on linear algebra

Here will be deadline! But not this time... this exercise is not evaluated.

### Exercise01 "Ray Casting"

Asignment: Implement a camera class suitable for the ray casting method. As usual, you should use a similar functionality as in the sample application. The application should specifically be able to:

• Render the scene (objects are movable).
• Move the camera in a 3D space.
• Change the camera's field of view (larger angle = more space to render), see Blender camera.

Try to change the color of the intersected object due to the distance from the camera

Bonus [+2%]: Create a camera which will rotate around defined point P (target) among a sphere with r = 1. You can use ideas from the Blender camera system and/or two-angle camera in OpenGL. The camera should use some sort of interactivity (2 angles) and targeted point P should be movable. Bonus camera can be created in a separated solution or you can change the structure in the template to implement two different cameras.

### Exercise02 "Primitives"

Asignment: Improve your tracer by adding a few primitives (ring, sphere, AABB box, triangle) [2] [3] [4] to the sample application.

Bonus [+1%]: Create also a cylinder and a cone primitives

Deadline: 12. 3. - 16:30

Asignment: Improve your tracer by implementing checker and Phong shaders, directional light, and hard shadows. Compute normals to each primitive in the point of intersection. As usual, you should use a similar functionality as in the sample application.

Deadline: 19. 3. - 16:30

### Exercise04 "Lights & Shadows"

Asignment: Improve your tracer by adding a point light, spot light [5] and an area light. In the case of point and spotlight, define the light as a point with hard shadows and linear/quadratic light attenuation [6]. Area light could be defined by Lights x Lights point lights. Area light should also be able to produce soft shadows.

[1 bonus %]: Write equation for illumination computed by sample code from seminar slides

Deadline: 26. 3. - 16:30

### ExerciseLab "Laboratory Experiment"

Could we imitate materials from the real world? Carpaint, Translucent, Yes, we can, and we will!

Asignment: Choose a sample of car paint and:

• Measure its gloss value in different conditions, and color in Lab converted to RGB using Easy RGB (use illuminant D50)
• Write your results in the Measurement Report
• Submit your results as a regular submission by mail

Deadline: 9. 4. - 16:30

### Exercise05 "More Shaders"

Asignment: Improve your tracer by adding a few more shaders: Toon / Cell, Cook-Torrance, Oren-Nayar, Gradient. As usual you should use a similar functionality as in the sample application.

[2 bonus %]: Implement Ward Shader [ Example ].

• You should generate tangent space for each point on the sphere
• Remember to keep the same orientation of tangent space at each point
• You can replace Phong sphere with a Ward sphere

Deadline: 9. 4. - 16:30

### Exercise06 "Reflection And Refraction"

Improve your tracer by adding reflections and refractions for rendering mirror and glass objects. As usual, you should use a similar functionality as in the sample application.

[1 bonus %]: Implement fresnel effect.

Deadline: 16. 4. - 16:30