Project 4 - 3D Graphics Pipeline

6.837 Project 4

3D graphics pipeline
Bruce Po - 11.23.98

source files:	Project4.java Matrix3D.java Triangle.java Vertex3D.java Raster.java ZRaster.java Drawable.java Point3D.java Light.java Surface.java
compiled class files:	EdgeEqn.class Light.class Matrix3D.class Matrix3x3.class Point3D.class Project4$SymMouse.class Project4$SymMouseMotion.class Project4.class Raster.class Surface.class Triangle.class Vertex3D.class ZRaster.class

The Java program reads a list of vertices, surfaces, and lights from the file cow.obj and renders into a raster. For this project the graphics pipline implements:

correct normals transformation
calculation of normals at each vertex
This is useful for more sophisticated illumination techniques which I didn't have the time to implement.
backface culling
directional and an ambient light sources
per triangle shading with support for ambient and diffuse reflection
polygon clipping in x, y, and z
Unforunately I haven't been able to fix all the bugs so I disabled this feature. An applet with the feature enabled can be found here.
z-buffering

For z-buffering and triangle rasterization I used code that was given out in class. The matrix class is my own, taken from Project 3.

Java 1.1 and higher is required in order to run this applet. If you are on MIT's Athena you can still run the applet by running:

add imagery4 java
cd /mit/imagery4/6.837/F98/igan/Project4.2
appletviewer index.html &

To move the model or camera around click and hold on the image, and in time only the vertices will be visible, allowing more interactive control.

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igan@mit.edu ... last modified 11.23.98