クラスの使用

2014年11月17日 (月) 03:06時点における版

• Ballクラスを作成
  • Ball.h　Ballクラスの宣言。変数とメソッド（関数）
  • Ball.cpp　コンストラクターBall()とメソッドの定義

Ball.h

#pragma once
#include "ofMain.h"

class Ball {
public:
	ofPoint pos;
	ofPoint vel;
	ofPoint acc;
	float radius;
	ofColor bcolor;
public:
	Ball();
	void draw();
	void update();
};

Ball.cpp

#include "Ball.h"

Ball::Ball(){
	pos = ofPoint(ofGetWidth()/2, ofGetHeight()/2);
	vel = ofPoint(ofRandom(-5,5),ofRandom(-3,3));
	acc = ofPoint(ofRandom(-0.5,0.5),ofRandom(-0.3,0.3));
	radius = ofRandom(35,50);
	bcolor = ofColor(ofRandom(200,255), ofRandom(0,255), ofRandom(0,255), 100);
}

void Ball::update(){
	acc = ofPoint(ofRandom(-0.5,0.5),ofRandom(-0.3,0.3));
	vel.x += acc.x;
	vel.y += acc.y;
	pos.x += vel.x;
	pos.y += vel.y;

	if( pos.x > ofGetWidth() || pos.x < 0 ){
		vel.x *= -1;
	}
	if( pos.y > ofGetHeight() || pos.y < 0 ){
		vel.y *= -1;
	}
}

void Ball::draw(){
	ofSetColor(bcolor);
	ofCircle(pos.x, pos.y, radius);
}

ofApp.h

#pragma once

#include "ofMain.h"
#include "Ball.h"

class ofApp : public ofBaseApp{
public:
	bool mouse_pressed;
	
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);
		
	Ball myball;
};

ofApp.cpp

#include "ofApp.h"

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

	ofBackground(0, 0, 0); //背景色の設定
	ofSetColor(255, 255, 0); //描画色の設定
	ofSetBackgroundAuto(false);
	ofSetFrameRate(30);
	ofEnableAlphaBlending();  //アルファチャンネルを有効にする
	ofSetCircleResolution(64);

	mouse_pressed = false;
}

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

	if(mouse_pressed ){
		myball.vel.x = ( mouseX - myball.pos.x ) * 0.01;
		myball.vel.y = ( mouseY - myball.pos.y ) * 0.01;
	}
	myball.update();
}

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

	//全画面を半透明の黒でフェード
	ofSetColor(0, 0, 0, 10);
	ofRect(0, 0, ofGetWidth(), ofGetHeight());

	myball.draw();
}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button){
	mouse_pressed = true;
}

//--------------------------------------------------------------
void ofApp::mouseReleased(int x, int y, int button){
	mouse_pressed = false;
}

参考

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