Computer Science 22C:196, Section 1, Spring 2006

Class Time: Tuesdays & Thursdays 9:30-10:45am, 217 MacLean Hall

(Originally scheduled for: TTh 10:55am-12:10pm, 221 MacLean Hall)

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Professor: Chris Wyman E-mail: cwyman@cs.uiowa.edu (Preferred contact method) Office: 101J MacLean Hall Phone: (319) 353-2549 (Please use e-mail when possible) Office Hours: TTh 10:45 am - 12:15 pm, Office Hours: or by appointment	Teaching Assistant: Zhihong Wang E-mail: zhihwang@cs.uiowa.edu Office: 311 MacLean Hall Office Hours: By appointment only (Note that most questions should be directed to the instructor)

Announcements:

• (4/24/06) -- If you would like to get your score for HW #4, please stop by my office or send me an e-mail. Scores: 25, 40, 40, 40, 42, 46, 50, 50.
  • The person with the low score should know why already.
  • Hopefully, you already know why you got points taken off. If you're unsure what you might have done wrong, I (think I) addressed all the problems people had in the description of HW #5, Problem 1.
• (4/21/06) -- Homework 5 has been posted.
• (4/21/06) -- There will be no class on May 2nd, due to an all-day meeting I must attend.
• (4/19/06) -- If you would like to get your score for HW #3, please stop by my office or send me an e-mail. Scores: 43, 45, 46, 46, 47, 48, 48, 50.
  • Most errors occurred on the Sobel filter (where many people included the 0.5 normalization inside the square root) and on the Median filter (where repeated applications would often cause the image to get brighter, or to shift position onscreen).
• (3/22/06) -- If you would like to get your score for HW #2, please stop by my office or send me an e-mail. Scores: 36, 45, 45, 46, 47, 48, 50, 50.
• (3/06/06) -- The third assignment has been posted.
• (3/02/06) -- If you would like to get your score for HW #1, please send me an e-mail. Scores: 30, 42, 42, 44, 48, 49, 50, 50.
• (2/10/06) -- The second assignment has been posted! Models and other resources will follow shortly.
• (1/23/06) -- The first assignment has been posted! Please see below.
• (1/17/06) -- Please note the time and room changes, as posted above.
• (12/28/05) -- Please note that the scheduled class time is tentative and almost certainly will change (a couple of students cannot meet at the scheduled time). Please come to the first day of class with a schedule of when you are NOT available. If we are unable to find another time acceptable to everyone, we will meet at the University-scheduled time. However, I don't forsee that this will be a problem.
• (12/28/05) -- All of you should consider being a SIGGRAPH student volunteer! By volunteering to help out at SIGGRAPH, you get free admission to the world's premiere graphics conference, a shared hotel room during the weeklong conference, some (typically small) travel assistance, and the chance to hob-knob with 20,000-30,000 other graphics geeks. The conference will be in Boston in 2006, during the last/first week of July/August.

Notes About Graphics Hardware Requirements:

As a course on advanced GPU features, this course will require relatively current graphics hardware. Graphics accelerators sufficient to run last semester's shader assignment should work for nearly all of this semester's work. If you needed to use the lab machines in 301 MLH for that assignment, plan to spend time in the lab this semester. Also note that one assignment may use the EXT_framebuffer_object extension, which is supported on nVidia 6xxx and 7xxx series cards, ATI X1xxx series cards, and possibly nVidia 58xx and 59xx cards. This assignment may require sharing of machines in the MLH 317 lab, unless your home machine has a supported card.

• The best way to check your current graphics card's capabilities is to: Download GLEW. Run the included binary "glewinfo" and search the output for "framebuffer_object". If the output says "OK," you should be good to go for the entire class. If not, update your graphics drivers and try again. If your card still fails, you may have to use lab machines for some assignments.

Assignments:

Please submit assignments into the directory for 22C:196 ( "c19601" ), and the correct homework subdirectory (i.e., "hw1", "hw2", "hw3", etc. ).

• Homework 5 (Due May 11th)
  • This will improve and extend upon Homework 4, and allow you to another chance to get things from HW 4 working.
  • I took an image from the Praun et al. Real-time Hatching paper that you can use to texture your objects if you choose to implement their work.
    • Note you will have to crop out the relevent bits yourself.
    • Also note you will have to resize the cropped pieces to powers-of-2.
    • An alternative is to create a dot pattern yourself, which should be relatively straightforward.
  • As I mentioned in class today (4/27), you may implement gloss maps (AdvOGL Book, p. 332) for Problem #2 for 5 points.
  • You may also implement ambient occlusion for 10 points in your assignment. Note:
    • To do this, you must have multiple complex objects in your scene.
    • You should compute ambient occlusion on all objects.
    • You should come talk to me (about which objects should occlude each other).
  
  
• Homework 4 (Due Apr 18th) (Reflection, Refraction)
  • Sample code shown in class for stencil-based planar reflection and render-to-texture planar reflection
    • Note, these are incomplete. You need to fill in a number of functions.
  • Some (Windows-based) demo programs I showed in class, with varying GPU requirements:
    • Complex mirror scene (from 1st day of class)
      • This has some interesting textures you can use for your walls/floor.
    • Double-sided refraction demo (from 3/28)
    • Demo of stenci-based planar reflections (3/21), as per above code snippet.
    • Demo of render-to-texture planar reflections (3/23), as per above code snippet.
  
  
• Homework 3 (Due Mar 28th) (Cg Shaders, Render to Texture, Image Processing)
  • NOTE: This assignment can be done one of two ways: using glReadPixels() or using render-to-texture. I suggest using the later, but it requires a graphics card supporting the OpenGL extension GL_EXT_framebuffer_object. See the note above. Please talk to me if you do not have access to a machine with this functionality (the 301 MLH lab does NOT), and I will get you access to machines that do.
  • Download Cg. Available for Windows, Linux, and Mac OS X.
    • Under Windows, the Cg installer will put headers, libraries, and DLLs in the correct locations.
  • More information about the OpenGL extension GL_EXT_framebuffer_object.
  • Code snippets you may use:
    • Code for loading and binding Cg programs: header file, C file.
    • Sample program using cg_init.c.
      • A Visual Studio.NET project, but should compile under Linux.
      • Requires GLEW and GLUT libraries, as well as (obviously) Cg libraries.
    • Code for a simple "framebuffer" class using the extension GL_EXT_framebuffer_object: header file , C++ file.
  • Interesting images:
    • A rose, at 1024^2 or at 512^2.
    • The rose with displacement noise and with salt-and-pepper noise.
    • Lady in hat, at 256^2.
    • New Zealand, at 1024^2 or at 512^2.
  
  
• Homework 2 (Due Mar 2nd) (Line Drawing, Fog, OpenGL Picking)
  • Models to use: Al Capone, Soccer Ball, F-16.
  
  
• Homework 1 (Due Feb 9th) (Display Lists, Vertex Arrays, and Simple Blending)
  • Models to use: dragon with 10k triangles, dragon with 250k triangles, dragon with 871k triangles, Buddha with 50k triangles, Buddha with 250k triangles, Buddha with 1087k triangles, a simple cube
  • Images to use: earth.rgb, checker pattern
  • Code to use: snippet for drawing text onscreen, code for reading PPMs, BMPs, and RGBs

Handouts, Slides, Code Snippets:

• January 19th: Notes about performance, display lists, and a code snippet demonstrating display lists.

Student Web Pages:

1. Bryan Andrews
2. Scott Davis
3. Scott Kavanagh
4. Michael Merickel
5. Qi Mo
6. Greg Nichols
7. Dustin Schwebach

Helpful Links:

• Compiling on the 301 MLH Linux Lab machines.
• Setup Visual Studio to compile GLEW/GLUT/OpenGL programs
• Sixteen Common OpenGL Pitfalls

• The OpenGL Homepage (Documentation, specifications, and downloads)
• Nate Robins' Win32 GLUT Page (Binaries and source, which should compile for non-Windows platforms too)
• The GLEW Homepage (You will need GLEW for this course! Easy, platform-independent access to OpenGL extensions)
• Cg Homepage (Information & downloads for nVidia's Cg)
• OpenGL Technical FAQ
• OpenGL Extension Registry (Specs for all the OpenGL extensions)

• XV -- a simple, useful image manipulation tool that reads PPM files.
• GIMP -- a more feature complete (bigger) image manipulation tool that reads PPMs.
• Cygwin -- run all your favorite UNIX programs on Windows (including X, gcc, emacs, etc.)

• PPM file format description
• GLUT 3 Specification (PDF)
• OpenGL 1.1 State Machine Diagram (PDF)
• Cg Documentation (further down the page)

• SIGGRAPH -- The ACM's special interest group on graphics.

• On Academic Dishonesty and Cheating (more info here)
• On Missing/Rescheduling Exams
• On Arrangments for Disabled Students
• On Complaints (and who to complain to)

Last Modified: Wednesday, December 28, 2005

Chris Wyman (cwyman@cs.uiowa.edu)