gistfile1.txt

package cooccurrencematrix;

import processing.core.PApplet;
import controlP5.*;

public class CooccurrenceMatrix extends PApplet {
  
	static final long serialVersionUID = 1;
	
	int items = 50;
	int itemSize = 10;
	float matrix[][];
	float threshold = 0.7f;
	int margin = 10;
	
	ControlP5 controls;
	Slider slider;
	
	public void setup() {
		int w = (items*itemSize) + (margin*2) + 200;
		int h = (items*itemSize) + (margin*2);
		size(w, h);
		
		controls = new ControlP5(this);
		slider = controls.addSlider("threshold")
				.setPosition((items*itemSize)+margin*2, margin)
				.setWidth(190)
				.setRange(0,1);
		
		generateMatrix();
		
	}

	public void draw() {
		colorMode(RGB);
		background(255, 255, 255);		
		drawMatrix();
	}
	
	public void drawMatrix() {
		colorMode(HSB, 1.0f);
		noStroke();
		
		pushMatrix();
		translate(10, 10);
		
		for(int y=0; y<items; y++) {
			for(int x=0; x<items; x++) { 
				if (matrix[y][x] < threshold) {
					fill(255);
				} else {
					fill(0, 0, 1 - matrix[y][x]);
				}
				rect(y*itemSize, x*itemSize, itemSize, itemSize);
			}
		}
		
		popMatrix();
		
		// Draw a border around it
		noFill();
		stroke(0);
		rect(margin, margin, items * itemSize, items * itemSize);
	}

	
	public void generateMatrix() {
		matrix = new float[items][items];
		int rowIndex = 0;;
		
		// init by blackout
		for(int y=0; y<items; y++) {
			for(int x=0; x<items; x++) { 
				matrix[y][x] = 0.0f;
			}
		}
		
		for(int y=0; y<items; y++) {
			for(int x=rowIndex; x<items; x++) { 
				if (x == y) {
					matrix[x][y] = 1.0f;
				} else {
					float tmp = (float)random(0,1);
					matrix[x][y] = tmp;
					//matrix[y][x] = tmp;
				}
			}
			rowIndex++;
		}
	}
	
	public void keyPressed() {
		generateMatrix();
	}
}