代码：

import processing.opengl.*;

PImage a;
boolean onetime = true;
int[][] aPixels;
int[][] values;
float angle;

void setup()
{
size(550, 400, OPENGL);

aPixels = new int[width][height];
values = new int[width][height];
noFill();

// Load the image into a new array
// Extract the values and store in an array
a = loadImage("geekaa_320.png");
a.loadPixels();
for (int i = 0; i < a.height; i++) {
for (int j = 0; j < a.width; j++) {
aPixels[j][i] = a.pixels[i*a.width + j];
values[j][i] = int(blue(aPixels[j][i]));
}
}
}

void draw()
{
background(255);
translate(width/2, height/2, 0);
scale(2.0);

// Update and constrain the angle
angle += 0.010;
rotateY(angle);

// Display the image mass
for (int i=0; i<a.height; i+=2) {
for (int j=0; j<a.width; j+=2) {
stroke(values[j][i], 200);
line(j-a.width/2, i-a.height/2, -values[j][i], j-a.width/2, i-a.height/2, -values[j][i]-10);
}
}
}

刚做了一个：
http://bbs.geekaa.com/topic/view/2264/1.html

希望will迟点能给我汇铜币。