ofxBox2d – ページ 7 – プログラミング de 落描き

2018年7月30日2018年7月30日

Particle fireworks. openframeworks

[ Video ]

[ About ]
パーティクル花火2018

particle fireworks 2018.

[ Source ]

#pragma once
#include "ofMain.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;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<float> circles_life;
};

#pragma once

#include "ofMain.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;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<float> circles_life;

};

#include "ofApp.h"

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

	ofBackground(239);
	ofSetLineWidth(3);

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

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

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

		this->circles_life[i] -= 3;
		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->box2d.update();
}

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

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

		ofSetColor(39, this->circles_life[i]);
		ofDrawCircle(this->circles[i].get()->getPosition(), 4);
		for (int j = i + 1; j < this->circles.size(); j++) {

			float distance = this->circles[i].get()->getPosition().distance(this->circles[j].get()->getPosition());
			if (distance < 50) {

				ofDrawLine(this->circles[i].get()->getPosition(), this->circles[j].get()->getPosition());
				ofSetColor(39, this->circles_life[j]);
				ofDrawLine(this->circles[i].get()->getPosition(), this->circles[j].get()->getPosition());
			}
		}
	}
}

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

	int color_base = ofRandom(256);
	float radius = 10;
	for (int i = 0; i < 3; i++) {

		int color_value = (color_base + i * 20) % 255;
		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(), ofGetWidth() * 0.5 + tmp_x, ofGetHeight() * 0.5 + tmp_y, 4);
			this->circles.back().get()->addForce(ofVec2f(tmp_x, tmp_y), 8.0);

			this->circles_life.push_back(255);
		}

		radius += 3;
	}
}

//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("Insta");

ofBackground(239);

ofSetLineWidth(3);

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

}

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

void ofApp::update() {

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

this->circles_life[i] -= 3;

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->box2d.update();

}

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

void ofApp::draw() {

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

ofSetColor(39, this->circles_life[i]);

ofDrawCircle(this->circles[i].get()->getPosition(), 4);

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

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

if (distance < 50) {

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

ofSetColor(39, this->circles_life[j]);

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

}

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

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

int color_base = ofRandom(256);

float radius = 10;

for (int i = 0; i < 3; i++) {

int color_value = (color_base + i * 20) % 255;

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(), ofGetWidth() * 0.5 + tmp_x, ofGetHeight() * 0.5 + tmp_y, 4);

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

this->circles_life.push_back(255);

}

radius += 3;

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180730

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2018年7月29日2018年7月29日

Velocity is alpha channel of color. openframeworks

[ Video ]

[ About ]
パーティクルの速度と色の透明度をリンクさせてみました。

Velocity is linked with color alpha.

[ Source ]

#pragma once
#include "ofMain.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;
	vector<pair<shared_ptr<ofxBox2dCircle>, ofColor>> circles;
	int force_field_radius;
};

#pragma once

#include "ofMain.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;

vector<pair<shared_ptr<ofxBox2dCircle>, ofColor>> circles;

int force_field_radius;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(39);

	// Initialize ofxBox2d
	this->box2d.init();
    this->box2d.setGravity(0, 0);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();

	// Add Circle
	for (int i = 0; i < 256; i++) {

		float radius = 12;
		shared_ptr<ofxBox2dCircle> circle = make_shared<ofxBox2dCircle>();
		circle->setPhysics(1.0, 0.85, 0.5);
		circle->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), radius);

		ofColor color;
		color.setHsb(ofRandom(255), 239, 239);

		this->circles.push_back(make_pair(circle, color));
	}

	this->force_field_radius = 150;
}

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

	// Field of Force on Center
	for (int i = 0; i < this->circles.size(); i++) {

		shared_ptr<ofxBox2dCircle> circle = get<0>(this->circles[i]);
		ofPoint point = get<0>(this->circles[i])->getPosition();

		float distance = point.distance(ofPoint(ofGetWidth() / 2, ofGetHeight() / 2));
		if(distance < this->force_field_radius) {

			ofPoint p = ofPoint(this->force_field_radius * cos(ofGetFrameNum() * DEG_TO_RAD), this->force_field_radius * sin(ofGetFrameNum() * DEG_TO_RAD));
			circle->addForce(p, ofMap(distance, 0, this->force_field_radius, 15, 1));
		}
	}

	// Compute box2d
	this->box2d.update();
}


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

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

	// Draw Filed of Force
	ofNoFill();
	ofSetColor(239);
	ofSetLineWidth(0.5);
	ofBeginShape();
	for (int deg = 0; deg < 360; deg += 1) {

		ofVertex(this->force_field_radius * cos(deg * DEG_TO_RAD), this->force_field_radius * sin(deg * DEG_TO_RAD));
	}
	ofEndShape(true);

	ofFill();
	ofBeginShape();
	for (int deg = ofGetFrameNum(); deg < ofGetFrameNum() + 360; deg += 120) {

		ofVertex(this->force_field_radius * cos(deg * DEG_TO_RAD), this->force_field_radius * sin(deg * DEG_TO_RAD));
	}
	ofEndShape(true);

	ofSetColor(39);
	ofBeginShape();
	for (int deg = ofGetFrameNum(); deg < ofGetFrameNum() + 360; deg += 120) {

		ofVertex(this->force_field_radius * 0.5 * cos(deg * DEG_TO_RAD), this->force_field_radius * 0.5 * sin(deg * DEG_TO_RAD));
	}
	ofEndShape(true);

	ofPopMatrix();

	// Draw Circles
	ofSetLineWidth(3);
	for (int i = 0; i < this->circles.size(); i++) {

		shared_ptr<ofxBox2dCircle> circle = get<0>(this->circles[i]);
		ofColor circle_color = get<1>(this->circles[i]);

		float radius = circle->getRadius();
		ofPoint point = circle->getPosition();

		ofSetColor(circle_color, ofMap(circle->getVelocity().length(), 3, 12, 0, 255));
		ofDrawCircle(point, radius);
		ofDrawLine(point, point - get<0>(this->circles[i])->getVelocity());
	}
}

//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(39);

// Initialize ofxBox2d

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

// Add Circle

for (int i = 0; i < 256; i++) {

float radius = 12;

shared_ptr<ofxBox2dCircle> circle = make_shared<ofxBox2dCircle>();

circle->setPhysics(1.0, 0.85, 0.5);

circle->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), radius);

ofColor color;

color.setHsb(ofRandom(255), 239, 239);

this->circles.push_back(make_pair(circle, color));

}

this->force_field_radius = 150;

}

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

void ofApp::update() {

// Field of Force on Center

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

shared_ptr<ofxBox2dCircle> circle = get<0>(this->circles[i]);

ofPoint point = get<0>(this->circles[i])->getPosition();

float distance = point.distance(ofPoint(ofGetWidth() / 2, ofGetHeight() / 2));

if(distance < this->force_field_radius) {

ofPoint p = ofPoint(this->force_field_radius * cos(ofGetFrameNum() * DEG_TO_RAD), this->force_field_radius * sin(ofGetFrameNum() * DEG_TO_RAD));

circle->addForce(p, ofMap(distance, 0, this->force_field_radius, 15, 1));

}

// Compute box2d

this->box2d.update();

}

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

void ofApp::draw() {

ofPushMatrix();

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

// Draw Filed of Force

ofNoFill();

ofSetColor(239);

ofSetLineWidth(0.5);

ofBeginShape();

for (int deg = 0; deg < 360; deg += 1) {

ofVertex(this->force_field_radius * cos(deg * DEG_TO_RAD), this->force_field_radius * sin(deg * DEG_TO_RAD));

}

ofEndShape(true);

ofFill();

ofBeginShape();

for (int deg = ofGetFrameNum(); deg < ofGetFrameNum() + 360; deg += 120) {

ofVertex(this->force_field_radius * cos(deg * DEG_TO_RAD), this->force_field_radius * sin(deg * DEG_TO_RAD));

}

ofEndShape(true);

ofSetColor(39);

ofBeginShape();

for (int deg = ofGetFrameNum(); deg < ofGetFrameNum() + 360; deg += 120) {

ofVertex(this->force_field_radius * 0.5 * cos(deg * DEG_TO_RAD), this->force_field_radius * 0.5 * sin(deg * DEG_TO_RAD));

}

ofEndShape(true);

ofPopMatrix();

// Draw Circles

ofSetLineWidth(3);

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

shared_ptr<ofxBox2dCircle> circle = get<0>(this->circles[i]);

ofColor circle_color = get<1>(this->circles[i]);

float radius = circle->getRadius();

ofPoint point = circle->getPosition();

ofSetColor(circle_color, ofMap(circle->getVelocity().length(), 3, 12, 0, 255));

ofDrawCircle(point, radius);

ofDrawLine(point, point - get<0>(this->circles[i])->getVelocity());

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180729

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2018年7月26日2018年7月26日

Divided video. openframeworks

[ Video ]

[ About ]
バラバラ動画

Divided video.

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofxBox2d.h"
#include "opencv2/opencv.hpp"

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

	ofFbo fbo;
	bool enable_gravity;

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dRect>> rects;

	cv::VideoCapture cap;
	cv::Size cap_size;

	float rect_size;
	vector<cv::Mat> frames;
	vector<unique_ptr<ofImage>> images;
	vector<cv::Rect> cv_rects;
};

#pragma once

#include "ofMain.h"

#include "ofxBox2d.h"

#include "opencv2/opencv.hpp"

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 windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofFbo fbo;

bool enable_gravity;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dRect>> rects;

cv::VideoCapture cap;

cv::Size cap_size;

float rect_size;

vector<cv::Mat> frames;

vector<unique_ptr<ofImage>> images;

vector<cv::Rect> cv_rects;

};

#include "ofApp.h"

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

	ofBackground(39);
	ofSetWindowTitle("openframeworks");

	this->cap.open("D:\\video\\image.mp4");
	this->cap_size = cv::Size(1280, 720);
	ofSetFrameRate(this->cap.get(CV_CAP_PROP_FPS));

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

	this->rect_size = 30;
	for (int x = 100; x < this->cap_size.width - 100; x += this->rect_size) {

		for (int y = 100; y < this->cap_size.height - 100; y += this->rect_size) {

			ofPoint start_point(x + ofGetWidth() * 0.5 - this->cap_size.width * 0.5, y + ofGetHeight() * 0.5 - this->cap_size.height * 0.5);

			this->rects.push_back(shared_ptr<ofxBox2dRect>(new ofxBox2dRect));
			this->rects.back().get()->setPhysics(1.0, 0.63, 0.1);
			this->rects.back().get()->setup(this->box2d.getWorld(), start_point.x, start_point.y, this->rect_size, this->rect_size);

			unique_ptr<ofImage> image(new ofImage());
			image->allocate(this->rect_size, this->rect_size, OF_IMAGE_COLOR);
			cv::Mat frame = cv::Mat(cv::Size(image->getWidth(), image->getHeight()), CV_MAKETYPE(CV_8UC3, image->getPixels().getNumChannels()), image->getPixels().getData(), 0);
			this->images.push_back(std::move(image));
			this->frames.push_back(frame);

			cv::Rect rect = cv::Rect(x, y, this->rect_size, this->rect_size);
			this->cv_rects.push_back(rect);
		}
	}

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

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

	cv::Mat src, frame;
	this->cap >> src;
	if (src.empty()) {

		cap.set(CV_CAP_PROP_POS_FRAMES, 1);
		return;
	}

	cv::resize(src, frame, this->cap_size);
	cv::cvtColor(frame, frame, CV_BGR2RGB);


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

		cv::Mat tmp_box_image(frame, this->cv_rects[i]);
		tmp_box_image.copyTo(this->frames[i]);
		this->images[i]->update();
	}

	if (this->enable_gravity == false) {

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

			for (int j = i + 1; j < this->rects.size(); j++) {

				float distance = this->rects[i]->getPosition().distance(this->rects[j]->getPosition());
				if (distance < 33) {

					this->rects[i]->addForce(this->rects[i]->getPosition() - this->rects[j]->getPosition(), 0.5);
					this->rects[j]->addForce(this->rects[j]->getPosition() - this->rects[i]->getPosition(), 0.5);
				}
			}
		}
	}

	this->box2d.update();

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

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

		ofPushMatrix();
		ofTranslate(this->rects[i].get()->getPosition().x, this->rects[i].get()->getPosition().y);
		ofRotate(this->rects[i].get()->getRotation());

		this->images[i]->draw(-this->rect_size / 2, -this->rect_size / 2);

		ofPopMatrix();
	}

	this->fbo.end();
}

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

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

//--------------------------------------------------------------
void ofApp::keyPressed(int key)
{
	if (key == 't') {

		this->box2d.setGravity(0, 10);
		this->enable_gravity = true;
	}
	else if (key == 'f') {

		this->box2d.setGravity(0, 0);
		this->enable_gravity = false;
	}

}

//========================================================================
int main() {

	ofSetupOpenGL(1280, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofBackground(39);

ofSetWindowTitle("openframeworks");

this->cap.open("D:\\video\\image.mp4");

this->cap_size = cv::Size(1280, 720);

ofSetFrameRate(this->cap.get(CV_CAP_PROP_FPS));

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(30);

this->box2d.registerGrabbing();

this->rect_size = 30;

for (int x = 100; x < this->cap_size.width - 100; x += this->rect_size) {

for (int y = 100; y < this->cap_size.height - 100; y += this->rect_size) {

ofPoint start_point(x + ofGetWidth() * 0.5 - this->cap_size.width * 0.5, y + ofGetHeight() * 0.5 - this->cap_size.height * 0.5);

this->rects.push_back(shared_ptr<ofxBox2dRect>(new ofxBox2dRect));

this->rects.back().get()->setPhysics(1.0, 0.63, 0.1);

this->rects.back().get()->setup(this->box2d.getWorld(), start_point.x, start_point.y, this->rect_size, this->rect_size);

unique_ptr<ofImage> image(new ofImage());

image->allocate(this->rect_size, this->rect_size, OF_IMAGE_COLOR);

cv::Mat frame = cv::Mat(cv::Size(image->getWidth(), image->getHeight()), CV_MAKETYPE(CV_8UC3, image->getPixels().getNumChannels()), image->getPixels().getData(), 0);

this->images.push_back(std::move(image));

this->frames.push_back(frame);

cv::Rect rect = cv::Rect(x, y, this->rect_size, this->rect_size);

this->cv_rects.push_back(rect);

}

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

}

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

void ofApp::update() {

cv::Mat src, frame;

this->cap >> src;

if (src.empty()) {

cap.set(CV_CAP_PROP_POS_FRAMES, 1);

return;

}

cv::resize(src, frame, this->cap_size);

cv::cvtColor(frame, frame, CV_BGR2RGB);

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

cv::Mat tmp_box_image(frame, this->cv_rects[i]);

tmp_box_image.copyTo(this->frames[i]);

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

}

if (this->enable_gravity == false) {

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

for (int j = i + 1; j < this->rects.size(); j++) {

float distance = this->rects[i]->getPosition().distance(this->rects[j]->getPosition());

if (distance < 33) {

this->rects[i]->addForce(this->rects[i]->getPosition() - this->rects[j]->getPosition(), 0.5);

this->rects[j]->addForce(this->rects[j]->getPosition() - this->rects[i]->getPosition(), 0.5);

}

this->box2d.update();

this->fbo.begin();

ofClear(0);

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

ofPushMatrix();

ofTranslate(this->rects[i].get()->getPosition().x, this->rects[i].get()->getPosition().y);

ofRotate(this->rects[i].get()->getRotation());

this->images[i]->draw(-this->rect_size / 2, -this->rect_size / 2);

ofPopMatrix();

}

this->fbo.end();

}

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

void ofApp::draw() {

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

}

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

void ofApp::keyPressed(int key)

{

if (key == 't') {

this->box2d.setGravity(0, 10);

this->enable_gravity = true;

}

else if (key == 'f') {

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

this->enable_gravity = false;

}

//========================================================================

int main() {

ofSetupOpenGL(1280, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180726

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