ofLecture 2

testApp.cpp

#include "testApp.h"

//--------------------------------------------------------------
void testApp::setup(){
    ofBackground(0, 0, 0);
    ofEnableAlphaBlending();
    ofEnableSmoothing();
    ofSetFrameRate(30);
    ofSetVerticalSync(true);
    
    camWidth = 480;
    camHeight = 360;
    
    video.setVerbose(true);
    video.initGrabber(camWidth, camHeight);
}

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

//--------------------------------------------------------------
void testApp::draw(){
    ofSetColor(255, 255, 255);
    video.draw(0, 0);
    
    unsigned char* px = video.getPixels();
    
    for (int i = 0; i < camWidth; i += 10) {
        for (int j = 0; j < camHeight; j += 10) {
            unsigned char r = px[j*3*camWidth+i*3];
            unsigned char g = px[j*3*camWidth+i*3+1];
            unsigned char b = px[j*3*camWidth+i*3+2];
            
//            r = 255 - r;
//            g = 255 - g;
//            b = 255 - b;
            
            float f = (255 - (r + g + b)) / 3 * 0.005;
            
            ofSetColor(r, g, b, 128);
            ofCircle(camWidth + i, j, 10.0 * f, 10.0 * f);
        }
    }
    
}

//--------------------------------------------------------------
void testApp::keyPressed(int key){

}

//--------------------------------------------------------------
void testApp::keyReleased(int key){

}

//--------------------------------------------------------------
void testApp::mouseMoved(int x, int y ){

}

//--------------------------------------------------------------
void testApp::mouseDragged(int x, int y, int button){

}

//--------------------------------------------------------------
void testApp::mousePressed(int x, int y, int button){

}

//--------------------------------------------------------------
void testApp::mouseReleased(int x, int y, int button){

}

//--------------------------------------------------------------
void testApp::windowResized(int w, int h){

}

//--------------------------------------------------------------
void testApp::gotMessage(ofMessage msg){

}

//--------------------------------------------------------------
void testApp::dragEvent(ofDragInfo dragInfo){ 

}