Prof Avery's weblog
the splintery porch swing of despair

<spool@kenytt.net>

Geek News

del.icio.us bookmarks

Minimal Ray Tracer
Some code to accompany tonight's lecture: a version of Paul Heckbert's Minimal Ray Tracer from Graphics Gems IV.

I've updated the code to do the following:

• compile with GNU C
• output plain PPM
• generate a 1024 by 1024 image instead of the tiny 32-pixel original

If you want to experiment with changing the scene defined in ray.h, you'll probably want to download NetPbm for Windows.

/var/spool/courses/csuf/2006/spring/cpsc465 #

Assignment 10
If you didn't finish Assignment 10, you can download assignment10.c as a starting point for Assignment 11.

/var/spool/courses/csuf/2006/spring/cpsc465 #

Demos for tonight's lecture
There are two demonstration program for tonight's lecture:

• shading.c
• texture.c

/var/spool/courses/csuf/2006/spring/cpsc465 #

Pixar's On-line Library
I happened across this the other day: Pixar has made available an On-line library of technical papers. Many of them are probably a bit advanced, but worth a look if you're considering further study.

/var/spool/courses/csuf/2006/spring/cpsc465 #

Is this normal behavior?
Have you noticed that the lighting calculations don't seem to be affecting your windshield the same way they affect the rest of the car?

I wonder which part of the illumination equation isn't being evaluated normally.

/var/spool/courses/csuf/2006/spring/cpsc465 #

Material Colors
Here's a function to set the current drawing color, whether or not lighting is enabled:

    void color(double r, double g, double b)
    {
        float color[4] = { r, g, b, 1.0 };

        if (glIsEnabled(GL_LIGHTING)) {
            glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, color);
        } else {
            glColor3f(r, g, b);
        }
    }

Alternatively, you could try reading about GL_COLOR_MATERIAL.

/var/spool/courses/csuf/2006/spring/cpsc465 #

Chapter mismatch between HTML and PDF versions of the Red Book
HTML and PDF versions of the Red Book -- they're different editions, with different Chapter divisions. The Chapter 12 you want is "Selection and Feedback", not "Evaluators and NURBS." The next chapter, "Lighting", has the same problem.

/var/spool/courses/csuf/2006/spring/cpsc465 #

January 2019
Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31

RSS

Topics

• administrivia (2)
• courses (138)
• . csuf (138)
• . . @2005 (103)
• . . . @spring (103)
• . . . . @cpsc423 (25)
• . . . . @cpsc433 (24)
• . . . . . @misc (14)
• . . . . @cpsc461 (20)
• . . . . @cpsc465 (26)
• . . @2006 (35)
• . . . @spring (35)
• . . . . @cpsc465 (34)
• . . . . . @misc (4)
• graphics (2)
• last (12)
• reviews (2)
• science (2)
• . math (1)
• . psychology (1)
• tools (3)
• . editors (1)
• . graphics (1)
• . security (1)

Archives

• July 2006 (1)
• June 2006 (2)
• May 2006 (7)
• April 2006 (4)
• March 2006 (9)
• February 2006 (16)
• January 2006 (2)
• July 2005 (3)
• May 2005 (15)
• April 2005 (20)
• March 2005 (31)
• February 2005 (34)
• January 2005 (4)
• June 2003 (1)
• May 2002 (3)
• April 2002 (7)
• March 2002 (2)