ofApp.cpp

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup(){
    ofBackground(10);
    ofEnableDepthTest();
    
    cam.setup(320, 240);
}

//--------------------------------------------------------------
void ofApp::update(){
    cam.update();
    
    // send camera to optical flow algorithm
    if(cam.isFrameNew())
        fb.calcOpticalFlow(cam);
    
    avgFlow = fb.getAverageFlow();
    
    smoothAvgFlow = onePole(smoothAvgFlow, avgFlow);
    
    movePlayerUsingFlow();
    

}

//--------------------------------------------------------------
void ofApp::draw() {
    ofSetColor(255);
    ofSetLineWidth(1);
    
    ofPushMatrix();
        // draw camera feed in top right corner
        ofTranslate(ofGetWidth()-cam.getWidth(), 0);
        fb.draw(0,0);
        cam.draw(0,0);
    ofPopMatrix();
    
    ofPushMatrix();
        // draw camera feed in top right corner
        ofTranslate(ofGetWidth()/2, ofGetHeight()/2);
    ofDrawLine(0, 0,smoothAvgFlow.x * 100, smoothAvgFlow.y * 100);
    ofPopMatrix();
    
    //printing out location
    ofDrawBitmapString("Player loaction: " +
        to_string(smoothAvgFlow.x) +
        to_string(smoothAvgFlow.y), 20, 50);
    game.run();
}

//--------------------------------------------------------------
void ofApp::keyPressed(int key){
    if(key == OF_KEY_LEFT)  game.move(-2);
    if(key == OF_KEY_RIGHT) game.move(2);
}

ofVec2f ofApp::onePole(ofVec2f current, ofVec2f prev){
    //coefficient
    float a = 0.9;
    return prev + a * (current - prev);
}

void ofApp::movePlayerUsingFlow(){
    float speed = 0.5;
    float threshold = 0.1;
    
    if(smoothAvgFlow.x < -threshold){
        game.move(-speed);
    }
    else if (smoothAvgFlow.x > threshold){
        game.move(speed);
    }
}