l2l-2013_10_07.cpp

#include "ofMain.h"

class ofApp : public ofBaseApp
{
public:
	void setup();
	void update();
	void draw();
	
	void keyPressed(int key);
	
	ofImage img;
};


void ofApp::setup()
{
	ofSetFrameRate(3);
	ofSetVerticalSync(true);
	
	ofSetWindowShape(500, 500);
	
	img.allocate(500, 500, OF_IMAGE_GRAYSCALE);
	img.update();
}

void ofApp::update()
{
	unsigned char * pixels = img.getPixels();
	
	// 1D loop
	for (int i=0; i<img.width * img.height; i++)
	{
		// pixels[i] = 120;
		pixels[i] = ofRandom(ofMap(ofGetMouseX(), 0, ofGetWidth(), 0, 255));
	}
	
	
	// 2D loop
//	for (int x=0; x<img.width; x++)
//	{
//		for (int y=0; y<img.height; y++)
//		{
//			
//			float dist = ofDist(mouseX, mouseY, x, y);
//			//pixels[y * img.width + x] = dist;
//			//pixels[y * img.width + x] = ofRandom(ofMap(ofGetMouseX(), 0, ofGetWidth(), 0, 255));
//			//pixels[y * img.width + x] = sin(ofGetElapsedTimef()) * 100 * x;
//			//pixels[y * img.width + x] = tan(ofGetElapsedTimef() * x * y) * 10;
//		}
//	}
	
	img.update();
}

void ofApp::draw()
{
	img.draw(0,0);
}

void ofApp::keyPressed(int key)
{
	
}


//========================================================================
int main(){
	ofSetupOpenGL(1024,768, OF_WINDOW);
	ofRunApp( new ofApp());
}