You may work in pairs or alone on this lab assignment.
The LEGO utility class from last week has proper surface normals and material properties set so that lighting may be used. Also, glFrontFace is used so that culling may be enabled if desired.
Required
Begin with last week’s application and…
- Add ambient light.
- Add a directional or positional light.
- Set-up perspective viewing with the proper aspect ratio.
- Make use of the depth buffer (from last week).
- Augment the file format to allow blocks to be rotated 90 degrees about the y-axis and add support for this feature to your program.
- Create a data file representing at least 10 bricks in various colors in a configuration of your own design. Several (or all) of the bricks should be “snapped together”. Some of the bricks should be rotated. Be sure to include your data file and a screen image with your report.
Required / Optional
At least two (four if working in a group of two) of the following features are required. In your report, be sure to clearly state which features you implemented. I welcome suggestions of additional features to be added to this list.
- Provide an interface for changing light parameters (position, etc.)
- Allow the user to select whether the light position is bound to the viewer, the scene, or the model
- Allow the user to change the viewing distance
- Allow the user to zoom in/out (note: this is different than the above option)
- Add other brick sizes besides 4×2×1
- Support culling
- Use display lists for efficiency
- Use vertex lists for efficiency
Feel free to add other features. Check with the instructor if you have any questions.
References
You may find the OpenGL FAQs for Developers helpful.
The OpenGL Technical FAQ’s section on lights is an excellent supplement to your textbook and provides suggestions on some of the above features.
Demonstration
Demonstrate your working program to the professor (25% of grade) during or before the week 5 lab.
Group Report (due by 11 P.M. Friday of week 5)
Your lab report need not be self-contained. This means that it is not necessary to restate the entire specification in your report.
- Prepare your report in PDF, Word, or XML (cctHW.xsl, or other approved XSL) format
- Include…
- a summary of what you did for this lab;
- details of any problems you encountered;
- suggestions for how the lab could be improved;
- things you could not figure out how to do;
- a list of extra features that you implemented, if any;
- A summary (dates, times, durations, and interruption
durations) of your activity log indicating how much time you spent
on the assignment. Use the following categories:
- Design
- Coding
- Debug (before you think it’s working)
- Test (after you think it’s working)
- Documentation
- Other
- Documented source code
- Code documentation with appropriate diagrams as produced by doxygen, javadoc, or a similar in-source documentation tool.
- Follow the report submission requirements.
- Email this file to the instructor with a subject and message body indicating that this is your CS-421 Lab 4 submission.