ParticleSystem example01 - testApp.cpp

#include "testApp.h"

//--------------------------------------------------------------
void testApp::setup(){
    // 画面基本設定
    ofSetFrameRate(60);
    ofBackground(63);
}

//--------------------------------------------------------------
void testApp::update(){
    for(int i = 0; i < NUM; i++){
        particle[i].resetForce();
        particle[i].addForce(ofVec2f(0, 0.25));
        particle[i].updateForce();
        particle[i].updatePos();
        particle[i].checkBounds(0, -1000, ofGetWidth(), ofGetHeight());
    }
}

//--------------------------------------------------------------
void testApp::draw(){
    // 設定した場所に円を描く
    for(int i = 0; i < NUM; i++){
        particle[i].draw();
    }
}

//--------------------------------------------------------------
void testApp::keyPressed(int key){
    // fキーでフルスクリーンに
    if (key == 'f') {
        ofToggleFullscreen();
    }
}

//--------------------------------------------------------------
void testApp::mouseReleased(int x, int y, int button){
    for(int i = 0; i < NUM; i++){
        ofVec2f pos = ofVec2f(x, y);
        float length = ofRandom(60);
        float angle = ofRandom(PI * 2);
        ofVec2f vel = ofVec2f(cos(angle) * length, sin(angle) * length);
        particle[i].setup(pos, vel);
        particle[i].radius = 4;
        particle[i].friction = 0.01;
    }
}

ParticleSystem example01 - testApp.h

#pragma once

#include "ofMain.h"
#include "Particle.h"

class testApp : public ofBaseApp{
    
public:
    void setup();
    void update();
    void draw();
    
    void keyPressed(int key);
    void keyReleased(int key);
    void mouseMoved(int x, int y );
    void mouseDragged(int x, int y, int button);
    void mousePressed(int x, int y, int button);
    void mouseReleased(int x, int y, int button);
    void windowResized(int w, int h);
    void dragEvent(ofDragInfo dragInfo);
    void gotMessage(ofMessage msg);
    
    static const int NUM = 1000;
    Particle particle[NUM];
};