CS559 Course News
Are you looking for the Basic
Course Information page?
News Pages: [ 1 | 2 | 3 | 4 ] next ->>
Fri, 23 Dec 2005
Either later today or Wednesday I will email everyone with their
Project 3 grade, their final exam score and grade, and their
unofficial final grade. (I am not allowed to tell you your
official final grade, only the registrar can do that).
I want to get them sent out today, but I'm not sure I will get them
Yu-Chi has the exams and the Project 3 score sheets, so if you have
questions about them, please ask me after January 8th (since I will be
traveling and he will be traveling).
Final Exam Key and Results
The answer key to the final exam is posted
Mean score = 64.3 Median score = 61
I tried two grading systems: one was the "it was a hard semester, give
everyone a Holiday Gift" scale
A > 78, AB > 64, B > 55, BC > 48, low scores gvein C
The other was the "how it really should be graded" scale:
A >= 90, AB >= 80(*), B >= 65, BC >=55, C >= 51, CD >= 43,
D >= 40
In all 32 exams, only 1 person was "on the fence" so I gave them the
extra point (*).
What's amazing about this is that switching between these two grading
systems give very different final exam scores, but did not change
anyone's grades. (Actually, its not so amazing, the final
doesn't count for much. And we were very generous with the grades
for the Assignments - 2/3s of the students got As.)
So I've chosen to use the harsher scale. That way, I can feel like the
exam was graded fairly. Your exam grade indicates how well you really
did on the final. And no one's permanent record is affected.
Overall, the class grades were very good. The mean and median grade is
an AB! (I don't mind the final grades being so high - this is a hard
class, and you've all put in a lot of effort.)
Tue, 20 Dec 2005
A reminder: The final exam will be at 12:25pm on Thursday, December
22th, in room 1325 CS.
The exam is cumulative - it will cover topics from the entire course,
although there will be an emphasis on topics discussed in class after
A Sample Solution for HW4
Is posted here.
Note: there are some cases where I gave "more correct" answers than
the student did. For the purposes of the homework, the answers given
And thanks to Mohamed for writing up his answers so nicely and
allowing me to share them.
Thu, 15 Dec 2005
Some of you have had some problems using "new" OpenGL features on the
CSL machines. Multi-texturing is one example.
The OpenGL libraries on the Storm machines should be up to date
(although, some people have had some problems that we are looking in
to). However, the header files defining the new functions are missing.
For now, you can try including the "glext.h" header in your
project. We have put a copy at
http://www.cs.wisc.edu/graphics/Courses/559-f2005/SampleCode/glext.h. There is a
chance that this might not work.
Just using a better header doesn't help. The correct solution is to
use an extension manager that determines what the driver is capable of
and provides access accordingly. If at this late of a date you're
still trying to figure this out, you're probably in trouble.
Tue, 13 Dec 2005
P3 Demo Signups
The signup sheet is posted outside of Yu-Chi's door. I will also bring
it to class on Thursday.
Articulation and P3
Just to be clear: an articulation is when two pieces of an object move
relative to one another - like a hinge. To move an articulation means
to make one piece move relative to the other. So, a windmill is an
articulated figure and having it spin around would be moving the
Mon, 12 Dec 2005
Another Bug in the P3 Sample Code
There is a subtle bug in the P3 Sample code: If a car starts out in an
intersection, it gets confused (since the direction it leaves an
intersection depends on the direction it came from, so if it didn't
have a from direction...).
By an amazing random chance (I think its about 1 in a million), this
never happened because the random placement of cars in the example
program never put one in the intersection. If you added more cars, or
if you re-seeded the random number generator, you won't be so lucky.
The easiest solution is to avoid placing cars in intersections. I did
this by changing my "main" routine to include the following (this is
inside the loop that makes the cars):
// we need to pick a road to start on...
Road* startRoad = 0;
startRoad = theRoads[rand() % theRoads.size()];
} while (startRoad->is_intersection);
new RandomDrive(c,startRoad,.2f,rand() % 2);
Late Policy for Project 3
Because of the tight timeline (projects must be graded by the end of
the semester), there will be no opportunity for "very late" projects.
All projects are due at 1pm on Friday the 16th.
For the 19 students who have turned in their previous projects on
time, there is of course no late penalty for this project (as you have
saved your one free late project for this one).
For the rest of you, we would prefer that you focused on making a good
project rather than turning it in on Tuesday morning. We will not
assess the full half-grade penalty for projects turned in between
Tuesday 9:30 (the original due date) and 1pm Friday.
In fairness to the people who have turned their previous assignments
in on time, we will take lateness into consideration into our
evaluation of Project 3. Because every Project 3 is different it is
difficult to to assign a specific number, but the penalties will
always be less than half of a letter grade.
If you prefer to turn your Project 3 in "on time" (e.g. by 9:30am
Tuesday) so it is not considered late you may. Please notify Yu-Chi as
soon as possible that you are choosing this option. Also, note that
the late penalty will be smaller than a half letter grade, so it is
probably worthwhile for you to take the extra time.
Previous grades are not be affected by this adjustment: it applies
only to Project 3.
Project 3 Grading
Will occur Friday afternoon, December 16th between 1 and 5 (more
specific details to be given later). Note: this means that no projects
can be accepted after 1pm on December 16th.
Mon, 05 Dec 2005
We'll do course evals in class next Tuesday (the 13th).
The lecture will be first (on computer animation) and we'll leave
some time for you to grade me.
Wed, 30 Nov 2005
Undergraduate Project Opportunities
There may be some opportunities to do graphics/visual computing projects
both within the graphics group and with other groups around campus. If
you're interested, please let us know.
Bug in GrTown Sample Code
There is a bug in the GrTown sample code. You might notice that once
the lights go on, all drawing gets messed up.
The problem is that in cars.cpp, blending is turned on to draw the headlights
but never turned off. If you insert the line of code:
after the "glClearColor" line in Cars.cpp in the method Car::drawAfter, things will
A second GrTown bug
The second bug causes the street lights not to draw, and will also
preclude any use of drawAfter in a hierarchical model. To fix it,
replace the for loop around line 108 of TownViewWidget.cpp with the
You can also remove the declaration of the variable g (since it will
no longer be used).
Sun, 27 Nov 2005
Wed, 23 Nov 2005
Final Exam Time and Place
The final exam will be on December 22nd at 12:25pm in Room 1325 Comp Sci.
This should be a lot easier to find than the midterm room.
Mon, 21 Nov 2005
Links to some of the sample code (particularly for Texture Mapping) were
broken. They have been fixed.
An Issue with the GraphicsTown sample code
Note: the graphics town code is organized into subdirectories.
When you unzip it, make sure to unzip the whole archive (so you get
the proper directory structure).
Rendering Slides Available
Shaohua's slides from the rendering lecturer are available on the Lecture Notes page.
Tue, 15 Nov 2005
Project 2 Demos
Project 2 Demos will be spread out around Thanksgiving. There will be
slots: Monday the 21st (3-4:30), Tuesday the 22nd (4-5:30) and Tuesday
the 29th (4-5:30). A signup sheet will be posted by Yu-Chi's office.
Please try to sign up for one of the slots.
News Pages: [ 1 | 2 | 3 | 4 ] next ->>