Project 1

600.358/600.458 Project 1

Handed out: Feb 2
Due: Mar 1, 4pm. (Submission procedure: Mail a zip file to the TA (jab at cs.jhu.edu)

Documented source and a README file must be included. If you use unix, include a Makefile. If you use windows, include a visual studio project.

Note1: 20% of your grade will be depend on the design, readability and documentation of your program.

In this project you will render a "soft" quadrilateral.

Display program

Generate a 3D texture using Perlin's hypertexture noise functions Refer to Hypertexture, K. Perlin and E. Hoffert, SIGGRAPH '89, pp 253--262.
Construct a display list with a single quad in it. 2D texture coordinates of the vertices are (0,0), (0,1), (1,1), and (1,0).
Call the display list k times per frame, where k is a function of the quad's orientation.
k = 16 |N.V| + 16, where N is the quad normal and V is the vector from the eye to center of the quad
Each instance of the quad is offset from its original position using a vertex program towards the viewer. The offsets are linear in a normalized "offset space". Thus, if 16 quads are used the offset coordinates are 0 to 1 in steps of 1/16. The object space offset is a multiple of the normalized offset and the multiplier is user specified (e.g., 1/128 of the quad size.). This third texture coordinate of the vertex is simply the offset in the normalized space.

User Interface

If the user clicks within 10 pixels of the corner rotate the quad about an axis passing through its center
If the user clicks within 10 pixels of the center, translate on screen in the direction of the mouse movement
Otherwise, scale the quad -- mouse movement towards screen edges scales up, and away from screen edges scales down

Challenge

Implement fur texture generation in a fragment program

General Tips

Implement the user interface first, using a single lit quad. Then map a manually generated 3D texture onto it. Finally, replace the texture with the Perlin Fur texture.

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