Project 5 - Two textures
In this project, you’ll be applying textures to 3D models. The project has two parts and each part is
about a different kind of texture. You’ll apply a 2D spherical environment map to an arbitrary model and
produce an image of a doughnut with a pattern given by a tilable texture.
1 Environment mapping
We are providing a few photographs of the light probe, you need to apply the images as textures so that
the model looks as if it was a mirror object in the corresponding environment. Note that the camera
should be fixed (with respect to the environment) as the model rotates.
2 Tilable texture
Draw a nice brick or wooden doughnut using one of the provided textures.
3 Display of the results
You can either cut and paste code from your 3D viewer, allowing the user to use trackball interface to
rotate the textured model or just rotate the model in an aperiodic fashion (as in the OpenGL sample code
provided for project 2).
4 Keyboard events
Please implement the following keyboard events:
F/f animate faster (say, about 30% faster); don’t handle this event if you use trackball interface
S/s animate slower (again, about 30%); don’t handle this event if you use trackball interface
A/a start rotating; the default should be no animation: when we start your programs, the displayed
model should be stationary; don’t handle this event if you use trackball interface
Z/z stop rotating; don’t handle this event if you use trackball interface
I/i zoom in
O/o zoom out
E/e if selected, the model should show up with environment mapping (of course, using the texture read
from the file whose name is given as the second argument)
D/d If selected, show textured doughnut; use one of the tilable textures
5 Input files
The environment maps and the tilable textures are just binary PPM images with no comment lines (same
as in project 3). Graphics hardware often has problems with textures with resolutions that are not powers
of two, so you can assume all PPM images’ resolutions are powers of two.
Your code should read the following files:
1
