CMP 160 -- Programming Assignment 3

Learn and apply 3D transformations. Also learn a little bit more about xforms (or your favorite GUI).

Write a program that reads in 3D object files and displays them in wireframe (skeleton drawing). The following directory on the cats/sun machines has examples of 3D data files that you can use: /afs/cats.ucsc.edu/class/cmps160.f99/data. Note that you may also include file readers or importers of other 3D file formats. If you do, be sure to include a sample data set with your submission. The minimum requirement for data format is the one in the above directory. Object must be displayed centered on the viewport. Hint: you'll need to adjust the parameters to glOrtho depending upon the size of the object.
After reading in an object file, allow the user to manipulate it (i.e. translate, rotate, and scale). This can be carried out by mouse movements, or withs sliders and/or dials from a GUI. Manipulation should be relative to the centroid of the object. Minimum requirement is translation, and rotation/scaling about the object's centroid (in world space). +3 bonus for object rotation in screen space (similar effect to java3D example below).
Include either the 3 world axes or 3 coordinate planes as a frame of reference. Allow the display to be toggled on/off.
Beyond the basic requirements above, you may also want to allow multiple objects to be loaded in and positioned in your world. If so, take advantage of the picking routine from prog2.
Like your earlier programs, it's always nice to have things behave properly even after your "window" has been moved and/or resized.

The data files in the class directory are: "coor-poly" files. Each object is defined with 2 files: the "coor" file specifies the coordinates of the object, and the "poly" file specifies the connectivity or the polygons of the object. The following code snippet shows how to read in this data format: readdata.c .
key.c illustrates how to detect and handle key stroke events. Accompanying files are: graphics.h , gui.h , gui.fd , gui.c and makefile .
Object rotation is illustrated by the following java3d online example . This does not seem to work properly on nt and suns yet, maybe later..
Submission must be done using the submit or xsubmit utility from CATS. Run "quickhelp submit" on a CATS machine to find out more info. Create and submit a subdirectory called "prog3". It should contain all the files you have in make your program compile/run. This includes folks using Windows/NT/MAC environments.
Grading guide