Meet Arnold:

Description

I first learned Java for a graduate course in graphics programming at NYU. At the time, the language was still in alpha, although during the course of that semester, the beta version came out. This applet was the final project for that course. It's not the best Java code on the planet, and not at all optimized for performance, but it works.

Arnold is a three-dimensional, articulated robot figure, drawn in wireframe, who can be positioned interactively by the user. The user can also use the keyboard to interactively reposition the camera to look at Arnold from any angle. Be patient; he draws himself very slowly!

Instructions

1. Select a body part from the menu. Use the scrollbars to set its rotation around the three axes. Note that most of the body parts can only rotate around one axis. As they say, this is not a "bug," but a "feature." I wanted to design the robot to look realistic, and it wouldn't have looked realistic if the body parts intersected in space.
2. The scrollbar at the bottom rotates the body part around the y axis of its attachment point, relative to its default position. The scrollbars at the left and the right have a similar effect, but around the z and x axes, respectively.
3. Note that the Pelvis is the root of the figure, and so rotating the pelvis rotates the entire figure in space.
4. The Camera can be moved around as follows:
   
   

   Modifier	Key	Effect
   none	up arrow	move camera forward
   	down arrow	move camera backward
   	left arrow	turn camera left
   	right arrow	turn camera right
   shift	up arrow	tilt camera upwards
   	down arrow	tilt camera downwards
   	left arrow	slide camera left
   	right arrow	slide camera right
   shift-ctrl	up arrow	slide camera upwards
   	down arrow	slide camera downwards
   	left arrow	roll camera left
   	right arrow	roll camera right

Java Source Files

default package;

RobotApplet.java

package myGraphics.VectorGrafix;

Matrix.java
Matrix2d.java
Matrix3d.java
Transformation2d.java
Transformation3d.java
Vector.java
Vector2d.java
Vector3d.java

package myGraphics.Shape3d;

Path.java
PathTableEntry.java
Shape.java

package myGraphics.Perspective;

Camera.java
Viewport.java

package myGraphics.Kinematics;

Figure.java
Model.java
StackMachine.java