Advanced Digital Cinematography

Arts College 755
Call No 02463-2
Req: 752
OSC 1224 Kinnear
Fishbowl (rm205)
TR 2-348
Winter 2008
05 credits

Instructor:
Matthew Lewis

NOTES

Links, examples, odds, and ends from various lectures can be found here as the quarter progresses...

Lecture 18

Real-time procedural shading

Lecture 16

NPR...

Another amazing survey by Craig Reynolds

Odds+Ends:

Cell shader on displaced sphere (textbook 12.8):

Note cracking prob with cel on displaced sphere. Seems to be related to filterwidth and filterstep. It's not a displacement bound or shading rate prob. Suggestions welcomed.

Lecture 15


Lecture 14

Occlusion, IBI, HDR, Global Illumination

Lecture 12

Solid shaders:

Hypertextures and Isosurfaces

hypertexture.sl

Lecture 08

1. Displacement in RmanNotes

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2. Simple displacement pattern layer example
(rib file)

- RmanNotes hetergeneous illumination example

-layered displacement illumination example:

-displacement "Lab assignment":

Lecture 06

Perlin Noise Talk

1. Color/Shape noise pattern example:

-----------------------------------

2. Incremental noise layer example:

Lecture 04

Here's a brief example/hint/snippet for polar coord usage:

  topolar2d(s-.5, t-.5, r, th);
  r = repeat(r, 8);
  th = repeat(th, 4);
  layer_opac = 
     intersection(pulse(0.3, .7, fuzz, r), 
	          pulse(0.25, 0.75, fuzz, th));

Also a few things about this little example:

Lecture 02

In class labs:

1. Background

Read and do Section 2 of assignment one, down through the first five "experiments", to get a quick handle on compiling and viewing shaders.

2. Ground/Sky Shader

Create a shader called "ground_sky". The shader should have one parameter called "location" of type string which specifies the type of image desired. Use the spline() function (see assignment one, experiment 21) to generate simple vertical washes which have a color scheme based on the location parameter. For example, if the location is "desert" the color might go from sienna, to tan, to light blue, to deeper blue from the bottom of the surface to the top. Your shader should handle the following locations: "desert," "arctic," and "sunset." You may add others if you like. Your shader should have some well-defined action if an invalid location is specified by the user and you are not required to perform any illumination calculations in this shader. To get you started, the shader declaration should look like: 
surface ground_sky(string location = "desert")
{
  /* your code here */
}

Note: RenderMan uses "==" for string comparison, and C-style if {;} else if {;} else {;} expressions.

Also, set parameter values in your rib file as follows:
Surface "myShaderName" "stringParam" "strValue" "numParam" [0.5] "colorP" [0 1 0]

3. Mix Corners

Write a shader called mix_corners which has the following declaration: 

surface mix_corners(color upleft = color (1,0,0), 
                    upright = color(0,0,1), 
                    lowleft = color (1,1,0), 
                    lowright = color(0,1,0))
Your shader should interpolate (linearly) between the colors at all four corners to compute the color at the current point. You can change the default values to your liking. Big hint: use the mix() function 3 times (see experiment 19.)

4. Color Scheme Shader

Extra-hard challenge bonus problem:

Modify the ground_sky shader above to accept three arguments: a base color, a range parameter [0,1], and a string with the value "monochromatic", "analogous", or "complementary". Generate an appropriate color scheme for your ground/sky/horizon based on the parameters specified.

Syllabus
Assignments
Notes

Student Work

Resources:
RManNotes
RMRepository
RenderMan FAQ
Highend3d
Deathfall
Textbook
Pixar
3Delight
Aqsis