openFrameworks – ページ 822 – プログラミング de 落描き

2017年12月19日2017年12月18日

Insta20171218

[ Video ]

[ About ]
速度の可視化。
我ながら超綺麗。
Speed visualization.

[ Source ]

#pragma once

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

class ofApp : public ofBaseApp {

public:
	~ofApp();

	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 mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	vector<Particle*> particles;
	vector<Cleator*> cleators;
};

#pragma once

#include "ofMain.h"

#include "Particle.h"

#include "Cleator.h"

class ofApp : public ofBaseApp {

public:

~ofApp();

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 mouseEntered(int x, int y) {};

void mouseExited(int x, int y) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

vector<Particle*> particles;

vector<Cleator*> cleators;

};

#include "ofApp.h"

//--------------------------------------------------------------
ofApp::~ofApp() {
	for (int i = this->particles.size() - 1; i > -1; i--) {
		delete this->particles[i];
		this->particles.erase(this->particles.begin() + i);
	}

	for (int i = this->cleators.size() - 1; i > -1; i--) {
		delete this->cleators[i];
		this->cleators.erase(this->cleators.begin() + i);
	}
}

//--------------------------------------------------------------
void ofApp::setup() {
	ofSetFrameRate(60);
	ofBackground(0);
	ofSetWindowTitle("Insta");

	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

	for (int i = 0; i < 5; i++) {
		this->cleators.push_back(new Cleator());
	}
}

//--------------------------------------------------------------
void ofApp::update() {
	for (int i = 0; i < this->cleators.size(); i++) {

		ofVec2f location = this->cleators[i]->get_location();
		ofVec2f velocity = this->cleators[i]->get_velocity();

		if (velocity.length() > 5) {
			this->particles.push_back(new Particle(location, velocity * 0.3));
		}
	}

	for (int i = this->particles.size() - 1; i > -1; i--) {
		this->particles[i]->update();

		if (this->particles[i]->isDead()) {
			delete this->particles[i];
			this->particles.erase(this->particles.begin() + i);
		}
	}

	for (int i = 0; i < this->cleators.size(); i++) {
		this->cleators[i]->update();
	}
}

//--------------------------------------------------------------
void ofApp::draw() {
	
	ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2);

	float distance;
	for (int i = 0; i < this->particles.size(); i++) {
		this->particles[i]->draw();
		for (int j = i; j < this->particles.size(); j++) {
			distance = this->particles[i]->get_location().distance(this->particles[j]->get_location());
			if (distance < 100) {
				ofDrawLine(this->particles[i]->get_location(), this->particles[j]->get_location());
			}
		}
	}

	for (int i = 0; i < this->cleators.size(); i++) {
		this->cleators[i]->draw();
	}
}

//--------------------------------------------------------------
int main() {
	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

//--------------------------------------------------------------

ofApp::~ofApp() {

for (int i = this->particles.size() - 1; i > -1; i--) {

delete this->particles[i];

this->particles.erase(this->particles.begin() + i);

}

for (int i = this->cleators.size() - 1; i > -1; i--) {

delete this->cleators[i];

this->cleators.erase(this->cleators.begin() + i);

}

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(0);

ofSetWindowTitle("Insta");

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

for (int i = 0; i < 5; i++) {

this->cleators.push_back(new Cleator());

}

//--------------------------------------------------------------

void ofApp::update() {

for (int i = 0; i < this->cleators.size(); i++) {

ofVec2f location = this->cleators[i]->get_location();

ofVec2f velocity = this->cleators[i]->get_velocity();

if (velocity.length() > 5) {

this->particles.push_back(new Particle(location, velocity * 0.3));

}

for (int i = this->particles.size() - 1; i > -1; i--) {

this->particles[i]->update();

if (this->particles[i]->isDead()) {

delete this->particles[i];

this->particles.erase(this->particles.begin() + i);

}

for (int i = 0; i < this->cleators.size(); i++) {

this->cleators[i]->update();

}

//--------------------------------------------------------------

void ofApp::draw() {

ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2);

float distance;

for (int i = 0; i < this->particles.size(); i++) {

this->particles[i]->draw();

for (int j = i; j < this->particles.size(); j++) {

distance = this->particles[i]->get_location().distance(this->particles[j]->get_location());

if (distance < 100) {

ofDrawLine(this->particles[i]->get_location(), this->particles[j]->get_location());

}

for (int i = 0; i < this->cleators.size(); i++) {

this->cleators[i]->draw();

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

#pragma once
#include "ofMain.h"

class Particle {
public:
	Particle();
	Particle(ofVec2f location, ofVec2f velocity);
	~Particle();

	void update();
	void draw();

	ofVec2f get_location();
	bool isDead();
private:
	ofVec2f location;
	ofVec2f velocity;

	float	body_size;
	ofColor body_color;
	int		alpha;
};

#pragma once

#include "ofMain.h"

class Particle {

public:

Particle();

Particle(ofVec2f location, ofVec2f velocity);

~Particle();

void update();

void draw();

ofVec2f get_location();

bool isDead();

private:

ofVec2f location;

ofVec2f velocity;

float body_size;

ofColor body_color;

int alpha;

};

#include "Particle.h"

Particle::Particle() : Particle(ofVec2f(0, 0), ofVec2f(0, 0)) { }

Particle::Particle(ofVec2f location, ofVec2f velocity)
{
	this->location = location;
	this->velocity = velocity;
	this->alpha = 255;
	this->body_size = velocity.length();
	this->body_color.setHsb(ofRandom(255), 255, 255);
}

Particle::~Particle() { }

void Particle::update()
{
	this->location += this->velocity;
	this->alpha -= 3;
}

void Particle::draw()
{
	ofSetColor(this->body_color, this->alpha);
	ofDrawEllipse(this->location, this->body_size, this->body_size);
}

ofVec2f Particle::get_location() {
	return this->location;
}

bool Particle::isDead()
{
	return this->alpha < 0;
}

#include "Particle.h"

Particle::Particle() : Particle(ofVec2f(0, 0), ofVec2f(0, 0)) { }

Particle::Particle(ofVec2f location, ofVec2f velocity)

{

this->location = location;

this->velocity = velocity;

this->alpha = 255;

this->body_size = velocity.length();

this->body_color.setHsb(ofRandom(255), 255, 255);

}

Particle::~Particle() { }

void Particle::update()

{

this->location += this->velocity;

this->alpha -= 3;

}

void Particle::draw()

{

ofSetColor(this->body_color, this->alpha);

ofDrawEllipse(this->location, this->body_size, this->body_size);

}

ofVec2f Particle::get_location() {

return this->location;

}

bool Particle::isDead()

{

return this->alpha < 0;

}

#pragma once
#include "ofMain.h"

class Cleator
{
public:
	Cleator();
	~Cleator();

	void applyForce(ofVec2f force);
	void seek(ofVec2f target);

	void update();
	void draw();

	ofVec2f get_location();
	ofVec2f get_velocity();

private:
	ofVec2f location;
	ofVec2f velocity;
	ofVec2f acceleration;
	ofVec2f future;
	ofVec2f target;
	float max_speed;
	float max_force;
	float radius;
	float angle;
};

#pragma once

#include "ofMain.h"

class Cleator

{

public:

Cleator();

~Cleator();

void applyForce(ofVec2f force);

void seek(ofVec2f target);

void update();

void draw();

ofVec2f get_location();

ofVec2f get_velocity();

private:

ofVec2f location;

ofVec2f velocity;

ofVec2f acceleration;

ofVec2f future;

ofVec2f target;

float max_speed;

float max_force;

float radius;

float angle;

};

#include "Cleator.h"

Cleator::Cleator()
{
	this->location = ofVec2f(ofRandom(-1, 1), ofRandom(-1, 1));
	this->velocity = ofVec2f(0, 0);
	this->acceleration = ofVec2f(0, 0);

	this->max_speed = 10;
	this->max_force = 3;
	this->radius = 30;
	this->angle = ofRandom(360);
}

Cleator::~Cleator()
{

}

void Cleator::applyForce(ofVec2f force)
{
	this->acceleration += force;
}

void Cleator::seek(ofVec2f target)
{
	ofVec2f desired = this->location - target;
	float distance = desired.length();
	desired.normalize();
	if (distance < this->radius)
	{
		float m = ofMap(distance, 0, this->radius, 0, this->max_speed);
		desired *= m;
	}
	else
	{
		desired *= this->max_speed;
	}

	ofVec2f steer = this->velocity - desired;
	steer.limit(this->max_force);
	applyForce(steer);
}

void Cleator::update()
{
	this->future.set(this->velocity);
	this->future.normalize();
	this->future *= 60;
	this->future += this->location;

	this->angle = ofRandom(0, 360);
	float x = 60 * cos(this->angle * DEG_TO_RAD) + future.x;
	float y = 60 * sin(this->angle * DEG_TO_RAD) + future.y;
	this->target = ofVec2f(x, y);

	this->seek(this->target);

	this->velocity += this->acceleration;
	this->velocity.limit(max_speed);
	this->location += this->velocity;

	if (this->location.x < -ofGetWidth() / 2) {
		this->location.x = -ofGetWidth() / 2;
		this->velocity.x *= -1;
	}
	else if (this->location.x > ofGetWidth() / 2) {
		this->location.x = ofGetWidth() / 2;
		this->velocity.x *= -1;
	}

	if (this->location.y < -ofGetHeight() / 2) {
		this->location.y = -ofGetHeight() / 2;
		this->velocity.y *= -1;
	}
	else if (this->location.y > ofGetHeight() / 2) {
		this->location.y = ofGetHeight() / 2;
		this->velocity.y *= -1;
	}

	this->acceleration *= 0;
	this->velocity *= 0.98;

}

void Cleator::draw()
{

}

ofVec2f Cleator::get_location() {
	return this->location;
}

ofVec2f Cleator::get_velocity() {
	return this->velocity;
}

#include "Cleator.h"

Cleator::Cleator()

{

this->location = ofVec2f(ofRandom(-1, 1), ofRandom(-1, 1));

this->velocity = ofVec2f(0, 0);

this->acceleration = ofVec2f(0, 0);

this->max_speed = 10;

this->max_force = 3;

this->radius = 30;

this->angle = ofRandom(360);

}

Cleator::~Cleator()

{

}

void Cleator::applyForce(ofVec2f force)

{

this->acceleration += force;

}

void Cleator::seek(ofVec2f target)

{

ofVec2f desired = this->location - target;

float distance = desired.length();

desired.normalize();

if (distance < this->radius)

{

float m = ofMap(distance, 0, this->radius, 0, this->max_speed);

desired *= m;

}

else

{

desired *= this->max_speed;

}

ofVec2f steer = this->velocity - desired;

steer.limit(this->max_force);

applyForce(steer);

}

void Cleator::update()

{

this->future.set(this->velocity);

this->future.normalize();

this->future *= 60;

this->future += this->location;

this->angle = ofRandom(0, 360);

float x = 60 * cos(this->angle * DEG_TO_RAD) + future.x;

float y = 60 * sin(this->angle * DEG_TO_RAD) + future.y;

this->target = ofVec2f(x, y);

this->seek(this->target);

this->velocity += this->acceleration;

this->velocity.limit(max_speed);

this->location += this->velocity;

if (this->location.x < -ofGetWidth() / 2) {

this->location.x = -ofGetWidth() / 2;

this->velocity.x *= -1;

}

else if (this->location.x > ofGetWidth() / 2) {

this->location.x = ofGetWidth() / 2;

this->velocity.x *= -1;

}

if (this->location.y < -ofGetHeight() / 2) {

this->location.y = -ofGetHeight() / 2;

this->velocity.y *= -1;

}

else if (this->location.y > ofGetHeight() / 2) {

this->location.y = ofGetHeight() / 2;

this->velocity.y *= -1;

}

this->acceleration *= 0;

this->velocity *= 0.98;

}

void Cleator::draw()

{

}

ofVec2f Cleator::get_location() {

return this->location;

}

ofVec2f Cleator::get_velocity() {

return this->velocity;

}

[ Link ]
https://github.com/junkiyoshi/Insta20171218

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2017年12月18日2017年12月15日

Insta20171217

[ Video ]

[ About ]
昨日の花火を近いParticle同士で図形を作るようにしました。
Glass fireworks.

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofFbo.h"
#include "ofxBox2d.h"

class ofApp : 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 mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	ofxBox2d box2d;

	ofFbo fbo;

	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<float> circles_size;
	vector<ofColor> circles_color;
	vector<float> circles_life;

};

#pragma once

#include "ofMain.h"

#include "ofFbo.h"

#include "ofxBox2d.h"

class ofApp : 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 mouseEntered(int x, int y) {};

void mouseExited(int x, int y) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofxBox2d box2d;

ofFbo fbo;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<float> circles_size;

vector<ofColor> circles_color;

vector<float> circles_life;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	ofSetFrameRate(30);
	ofBackground(0);
	ofSetWindowTitle("Insta");

	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

	this->box2d.init();
	this->box2d.setGravity(0, 15);
	this->box2d.createBounds();
	this->box2d.setFPS(30);
	this->box2d.registerGrabbing();

	this->fbo.allocate(ofGetWidth(), ofGetHeight());

}

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

	for (int i = this->circles.size() - 1; i > -1; i--) {
		this->circles_life[i] -= 3.5;

		if (this->circles_life[i] < 0) {
			this->circles[i].get()->destroy();
			this->circles.erase(this->circles.begin() + i);
			this->circles_life.erase(this->circles_life.begin() + i);
			this->circles_color.erase(this->circles_color.begin() + i);
		}
	}

	this->box2d.update();

	this->fbo.begin();
	ofClear(0);

	for (int i = 0; i < this->circles.size(); i++) {
		vector<ofVec2f> near_point;

		for (int j = i; j < this->circles.size(); j++) {
			float distance = this->circles[i].get()->getPosition().distanceSquared(this->circles[j].get()->getPosition());
			if (distance < 50 * 50) {
				near_point.push_back(this->circles[j].get()->getPosition());
			}
		}

		ofSetColor(this->circles_color[i], 192);
		if (near_point.size() > 2) {
			ofBeginShape();
			for (int i = 0; i < near_point.size(); i++) {
				ofVertex(near_point[i].x, near_point[i].y);
			}
			ofEndShape(true);
		}
		else {
			continue;
		}

	}

	this->fbo.end();
}

//--------------------------------------------------------------
void ofApp::draw() {
	this->fbo.draw(0, 0);
}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button) {
	float radius = 10;
	for (int i = 0; i < 5; i++) {
		float color_value = ofRandom(256);
		for (int deg = 0; deg < 360; deg += 10) {
			float tmp_x = radius * cos(deg * DEG_TO_RAD);
			float tmp_y = radius * sin(deg * DEG_TO_RAD);

			this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));
			this->circles.back().get()->setPhysics(3.0, 0.5, 0.1);
			this->circles.back().get()->setup(this->box2d.getWorld(), x + tmp_x, y + tmp_y, 4);
			this->circles.back().get()->addForce(ofVec2f(tmp_x, tmp_y), 6.0);

			ofColor circle_color;
			circle_color.setHsb(color_value, 255, 255);
			this->circles_color.push_back(circle_color);

			this->circles_life.push_back(255);
		}

		radius += 3;
	}
}

//--------------------------------------------------------------
int main() {
	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

100

101

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(30);

ofBackground(0);

ofSetWindowTitle("Insta");

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

this->box2d.init();

this->box2d.setGravity(0, 15);

this->box2d.createBounds();

this->box2d.setFPS(30);

this->box2d.registerGrabbing();

this->fbo.allocate(ofGetWidth(), ofGetHeight());

}

//--------------------------------------------------------------

void ofApp::update() {

for (int i = this->circles.size() - 1; i > -1; i--) {

this->circles_life[i] -= 3.5;

if (this->circles_life[i] < 0) {

this->circles[i].get()->destroy();

this->circles.erase(this->circles.begin() + i);

this->circles_life.erase(this->circles_life.begin() + i);

this->circles_color.erase(this->circles_color.begin() + i);

}

this->box2d.update();

this->fbo.begin();

ofClear(0);

for (int i = 0; i < this->circles.size(); i++) {

vector<ofVec2f> near_point;

for (int j = i; j < this->circles.size(); j++) {

float distance = this->circles[i].get()->getPosition().distanceSquared(this->circles[j].get()->getPosition());

if (distance < 50 * 50) {

near_point.push_back(this->circles[j].get()->getPosition());

}

ofSetColor(this->circles_color[i], 192);

if (near_point.size() > 2) {

ofBeginShape();

for (int i = 0; i < near_point.size(); i++) {

ofVertex(near_point[i].x, near_point[i].y);

}

ofEndShape(true);

}

else {

continue;

}

this->fbo.end();

}

//--------------------------------------------------------------

void ofApp::draw() {

this->fbo.draw(0, 0);

}

//--------------------------------------------------------------

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

float radius = 10;

for (int i = 0; i < 5; i++) {

float color_value = ofRandom(256);

for (int deg = 0; deg < 360; deg += 10) {

float tmp_x = radius * cos(deg * DEG_TO_RAD);

float tmp_y = radius * sin(deg * DEG_TO_RAD);

this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));

this->circles.back().get()->setPhysics(3.0, 0.5, 0.1);

this->circles.back().get()->setup(this->box2d.getWorld(), x + tmp_x, y + tmp_y, 4);

this->circles.back().get()->addForce(ofVec2f(tmp_x, tmp_y), 6.0);

ofColor circle_color;

circle_color.setHsb(color_value, 255, 255);

this->circles_color.push_back(circle_color);

this->circles_life.push_back(255);

}

radius += 3;

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20171217

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2017年12月17日2017年12月15日

Insta20171216

[ Video ]

[ About ]
花火。
HA NA BI.

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofFbo.h"
#include "ofxBox2d.h"

class ofApp : 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 mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	ofxBox2d box2d;

	ofFbo fbo;

	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<float> circles_size;
	vector<ofColor> circles_color;
	vector<float> circles_life;

};

#pragma once

#include "ofMain.h"

#include "ofFbo.h"

#include "ofxBox2d.h"

class ofApp : 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 mouseEntered(int x, int y) {};

void mouseExited(int x, int y) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofxBox2d box2d;

ofFbo fbo;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<float> circles_size;

vector<ofColor> circles_color;

vector<float> circles_life;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	ofSetFrameRate(60);
	ofBackground(0);
	ofSetWindowTitle("Insta");

	ofSetColor(255);
	ofSetLineWidth(3);

	this->box2d.init();
	this->box2d.setGravity(0, 15);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();

	this->fbo.allocate(ofGetWidth(), ofGetHeight());

}

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

	for (int i = this->circles.size() - 1; i > -1; i--) {
		this->circles_life[i] -= 1.5;

		if (this->circles_life[i] < 0) {
			this->circles[i].get()->destroy();
			this->circles.erase(this->circles.begin() + i);
			this->circles_life.erase(this->circles_life.begin() + i);
			this->circles_color.erase(this->circles_color.begin() + i);
		}
	}

	this->box2d.update();

	this->fbo.begin();
	ofFill();
	ofClear(0);

	for (int i = 0; i < this->circles.size(); i++) {
		ofSetColor(this->circles_color[i]);
		//ofDrawCircle(this->circles[i].get()->getPosition(), this->circles_size[i]);
		ofDrawLine(this->circles[i].get()->getPosition(), this->circles[i].get()->getPosition() - this->circles[i].get()->getVelocity());

	}

	this->fbo.end();
}

//--------------------------------------------------------------
void ofApp::draw() {
	this->fbo.draw(0, 0);
}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button) {
	float radius = 10;
	for (int i = 0; i < 5; i++) {
		float color_value = ofRandom(256);
		for (int deg = 0; deg < 360; deg += 10) {
			float tmp_x = radius * cos(deg * DEG_TO_RAD);
			float tmp_y = radius * sin(deg * DEG_TO_RAD);

			this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));
			this->circles.back().get()->setPhysics(3.0, 0.5, 0.1);
			this->circles.back().get()->setup(this->box2d.getWorld(), x + tmp_x, y + tmp_y, 4);
			this->circles.back().get()->addForce(ofVec2f(tmp_x, tmp_y), 8.0);

			ofColor circle_color;
			circle_color.setHsb(color_value, 255, 255);
			this->circles_color.push_back(circle_color);

			this->circles_life.push_back(255);
		}

		radius += 10;
	}
}

//--------------------------------------------------------------
int main() {
	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(0);

ofSetWindowTitle("Insta");

ofSetColor(255);

ofSetLineWidth(3);

this->box2d.init();

this->box2d.setGravity(0, 15);

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

this->fbo.allocate(ofGetWidth(), ofGetHeight());

}

//--------------------------------------------------------------

void ofApp::update() {

for (int i = this->circles.size() - 1; i > -1; i--) {

this->circles_life[i] -= 1.5;

if (this->circles_life[i] < 0) {

this->circles[i].get()->destroy();

this->circles.erase(this->circles.begin() + i);

this->circles_life.erase(this->circles_life.begin() + i);

this->circles_color.erase(this->circles_color.begin() + i);

}

this->box2d.update();

this->fbo.begin();

ofFill();

ofClear(0);

for (int i = 0; i < this->circles.size(); i++) {

ofSetColor(this->circles_color[i]);

//ofDrawCircle(this->circles[i].get()->getPosition(), this->circles_size[i]);

ofDrawLine(this->circles[i].get()->getPosition(), this->circles[i].get()->getPosition() - this->circles[i].get()->getVelocity());

}

this->fbo.end();

}

//--------------------------------------------------------------

void ofApp::draw() {

this->fbo.draw(0, 0);

}

//--------------------------------------------------------------

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

float radius = 10;

for (int i = 0; i < 5; i++) {

float color_value = ofRandom(256);

for (int deg = 0; deg < 360; deg += 10) {

float tmp_x = radius * cos(deg * DEG_TO_RAD);

float tmp_y = radius * sin(deg * DEG_TO_RAD);

this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));

this->circles.back().get()->setPhysics(3.0, 0.5, 0.1);

this->circles.back().get()->setup(this->box2d.getWorld(), x + tmp_x, y + tmp_y, 4);

this->circles.back().get()->addForce(ofVec2f(tmp_x, tmp_y), 8.0);

ofColor circle_color;

circle_color.setHsb(color_value, 255, 255);

this->circles_color.push_back(circle_color);

this->circles_life.push_back(255);

}

radius += 10;

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20171216

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