Starting point code for Week 6

ofApp.cpp

#include "ofApp.h"

#define NUM_PARTICLES 100

float radius = 10;
ofPoint pos[NUM_PARTICLES];
ofPoint vel[NUM_PARTICLES];


//--------------------------------------------------------------
void ofApp::setup(){

    for(int i=0; i<NUM_PARTICLES; i++) {
        pos[i].x = ofRandom( radius, ofGetWidth()-radius );
        pos[i].y = ofRandom( radius, ofGetHeight()-radius );
        
        vel[i].x = ofRandom(-10, 10);
        vel[i].y = ofRandom(-10, 10);
    }
}

//--------------------------------------------------------------
void ofApp::update(){
    for(int i=0; i<NUM_PARTICLES; i++) {
        pos[i] += vel[i];
        
        if(pos[i].x > ofGetWidth()-radius) {
            pos[i].x = ofGetWidth()-radius;
            vel[i].x *= -1;
        }
        if(pos[i].y > ofGetHeight()-radius) {
            pos[i].y = ofGetHeight()-radius;
            vel[i].y *= -1;
        }
        if(pos[i].x < radius) {
            pos[i].x = radius;
            vel[i].x *= -1;
        }
        if(pos[i].y < radius) {
            pos[i].y = radius;
            vel[i].y *= -1;
        }
    }
}

//--------------------------------------------------------------
void ofApp::draw(){
    ofSetColor(0);
    for(int i=0; i<NUM_PARTICLES; i++) {
        ofDrawCircle(pos[i], radius);
    }
}

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

}

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

}

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

}

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

}

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

}

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

}

//--------------------------------------------------------------
void ofApp::mouseEntered(int x, int y){

}

//--------------------------------------------------------------
void ofApp::mouseExited(int x, int y){

}

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

}

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

}

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

}