test from sublimetext2

testApp.cpp

testApp.cpp

#include "testApp.h"

//--------------------------------------------------------------
void testApp::setup(){
    w = ofGetWidth();
    h = ofGetHeight();

    cam.initGrabber(w,h,true);
    pdf = new ofxCairo();
    saving = false;
    size = 4;
    step = 7;

    ofSetFrameRate(30);
    ofBackground(255,255,255);
    ofSetWindowTitle("move mouse for changing detail, press 's' to save");
}

//--------------------------------------------------------------
void testApp::update(){
    cam.update();
}

//--------------------------------------------------------------
void testApp::draw(){
    ofSetColor(255,255,255);

    //if saving mode is on begin PDF writing
    if (saving) {
        filename = ofToString(ofRandomuf()) + ".pdf";
        pdf->begin(filename, w, h, OF_OUTPUT_PDF);
    }

    //distance between circles and their size depends on mouse pos
    size = ofMap(mouseX,0,ofGetWidth(),1,10);
    step = ofMap(mouseY,0,ofGetHeight(),10,3);

    for (int y=0; y<h; y+=step) {
        for (int x=0; x<w; x+=step) {

            //get pixel color from camera
            int i = (y*w+x)*3;
            int r = cam.getPixels()[i+0];
            int g = cam.getPixels()[i+1];
            int b = cam.getPixels()[i+2];

            //calculate brightness
            float bri = (r+g+b) / 765.0;

            //draw black circles
            pdf->setColor(0);
            pdf->circle(x,y,(1-bri)*size);
        }
    }

    //if saving mode was on finish pdf writing and open preview
    if (saving) {
        pdf->end();
        delete pdf;
        pdf = new ofxCairo();
        saving = false;
        system(("open " + ofToDataPath(filename)).c_str());
    }
}

//--------------------------------------------------------------
void testApp::keyPressed(int key){
    //press s to enter saving mode
    if (key=='s') saving=true;
}