ofxBox2d – ページ 8 – プログラミング de 落描き

2018年7月25日2018年7月25日

Self-healing video. openframeworks

[ Video ]

[ About ]
自己修復する動画を作りました。画像処理にOpenCV、物理エンジンにofxBox2dを使っています。

I made a self-healing video. Using library is OpenCV and ofxBox2d.

[ 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;

	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;
	vector<ofPoint> start_point;
};

#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;

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;

vector<ofPoint> start_point;

};

#include "ofApp.h"

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

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

	this->cap.open("D:\\video\\image.mp4");
	this->cap_size = cv::Size(640, 360);
	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 = 20;
	for (int x = 0; x < this->cap_size.width; x += this->rect_size) {

		for (int y = 0; y < this->cap_size.height; 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, 0.5, 5.0);
			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->start_point.push_back(start_point);
		}
	}

	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++) {

		ofVec2f distance = this->start_point[i] - this->rects[i]->getPosition();
		this->rects[i]->addForce(distance, 0.01);

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

	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);
}

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

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

100

101

#include "ofApp.h"

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

void ofApp::setup() {

ofBackground(39);

ofSetWindowTitle("openframeworks");

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

this->cap_size = cv::Size(640, 360);

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 = 20;

for (int x = 0; x < this->cap_size.width; x += this->rect_size) {

for (int y = 0; y < this->cap_size.height; 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, 0.5, 5.0);

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->start_point.push_back(start_point);

}

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++) {

ofVec2f distance = this->start_point[i] - this->rects[i]->getPosition();

this->rects[i]->addForce(distance, 0.01);

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

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

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

}

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);

}

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

int main() {

ofSetupOpenGL(1280, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180725

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2018年6月27日2018年6月27日

絵文字(ofTrueTypeFont)と物理演算(Box2d) openFrameworks

[ Video ]

[ About ]
絵文字って丸いよね…と思いついて、物理演算(ofxBox2d)とコラボさせてみました😁

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

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<ofColor> circles_color;
	vector<string> words;
	ofxBox2dEdge eage_1, eage_2;
};

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofTrueTypeFont font;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<ofColor> circles_color;

vector<string> words;

ofxBox2dEdge eage_1, eage_2;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("Insta");
	
	ofBackground(239);

	ofTrueTypeFontSettings font_settings("fonts/EmojiSymbols-Regular.ttf", 30);
	font_settings.antialiased = true;
	font_settings.addRanges(ofAlphabet::Emoji);
	this->font.load(font_settings);

	this->box2d.init();
	this->box2d.setGravity(0, 5);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();

	this->eage_1 = ofxBox2dEdge();
	this->eage_1.addVertex(ofGetWidth() / 2 - 150, ofGetHeight() / 2 + 100);
	this->eage_1.addVertex(ofGetWidth() / 2, ofGetHeight() / 2);
	this->eage_1.create(this->box2d.getWorld());

	this->eage_2 = ofxBox2dEdge();
	this->eage_2.addVertex(ofGetWidth() / 2 + 150, ofGetHeight() / 2 + 100);
	this->eage_2.addVertex(ofGetWidth() / 2, ofGetHeight() / 2);
	this->eage_2.create(this->box2d.getWorld());
}

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

	if (ofGetFrameNum() % 10 == 0) {

		float radius = 15;
		auto circle = make_shared<ofxBox2dCircle>();
		circle->setPhysics(1.0, 0.63, 0.1);
		circle->setup(this->box2d.getWorld(), ofRandom(ofGetWidth() * 0.5 - 50, ofGetWidth() * 0.5 + 50), 15, radius);
		this->circles.push_back(circle);

		ofColor circle_color;
		circle_color.setHsb(ofRandom(255), 255, 239);
		this->circles_color.push_back(circle_color);

		vector<string> emojis = { u8"😁", u8"😍", u8"😂", u8"😱", u8"😎" };
		this->words.push_back(emojis[(int)ofRandom(emojis.size())]);
	}

	this->box2d.update();
}	

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

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

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

		ofSetColor(this->circles_color[i]);
		this->font.drawString(this->words[i], -15, 15);

		ofPopMatrix();
	}

	ofSetColor(39);
	this->eage_1.draw();
	this->eage_2.draw();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("Insta");

ofBackground(239);

ofTrueTypeFontSettings font_settings("fonts/EmojiSymbols-Regular.ttf", 30);

font_settings.antialiased = true;

font_settings.addRanges(ofAlphabet::Emoji);

this->font.load(font_settings);

this->box2d.init();

this->box2d.setGravity(0, 5);

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

this->eage_1 = ofxBox2dEdge();

this->eage_1.addVertex(ofGetWidth() / 2 - 150, ofGetHeight() / 2 + 100);

this->eage_1.addVertex(ofGetWidth() / 2, ofGetHeight() / 2);

this->eage_1.create(this->box2d.getWorld());

this->eage_2 = ofxBox2dEdge();

this->eage_2.addVertex(ofGetWidth() / 2 + 150, ofGetHeight() / 2 + 100);

this->eage_2.addVertex(ofGetWidth() / 2, ofGetHeight() / 2);

this->eage_2.create(this->box2d.getWorld());

}

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

void ofApp::update() {

if (ofGetFrameNum() % 10 == 0) {

float radius = 15;

auto circle = make_shared<ofxBox2dCircle>();

circle->setPhysics(1.0, 0.63, 0.1);

circle->setup(this->box2d.getWorld(), ofRandom(ofGetWidth() * 0.5 - 50, ofGetWidth() * 0.5 + 50), 15, radius);

this->circles.push_back(circle);

ofColor circle_color;

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

this->circles_color.push_back(circle_color);

vector<string> emojis = { u8"😁", u8"😍", u8"😂", u8"😱", u8"😎" };

this->words.push_back(emojis[(int)ofRandom(emojis.size())]);

}

this->box2d.update();

}

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

void ofApp::draw() {

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

ofPushMatrix();

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

ofRotate(this->circles[i]->getRotation());

ofSetColor(this->circles_color[i]);

this->font.drawString(this->words[i], -15, 15);

ofPopMatrix();

}

ofSetColor(39);

this->eage_1.draw();

this->eage_2.draw();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180627

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2018年5月13日2018年5月13日

惹かれて離れて openFrameworks ofxBox2d

[ Video ]

[ About ]
一定周期でParticle同士が、お互いに引き合う力・突き放す力が入れ替わります。

[ Source ]

#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) {}

	int direction;

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<ofColor> circles_color;
};

#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) {}

int direction;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<ofColor> circles_color;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofBackground(239);
	ofSetWindowTitle("Insta");

	ofSetColor(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 < 255; i++) {

		float radius = 12;
		auto circle = make_shared<ofxBox2dCircle>();
		circle->setPhysics(1.0, 0.63, 0.1);
		circle->setup(this->box2d.getWorld(), ofRandom(ofGetWidth() / 2), ofRandom(ofGetHeight() / 2), radius);

		this->circles.push_back(circle);

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

		this->circles_color.push_back(circle_color);
	}

	this->direction = 1;
}

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

	// Change Power Direction
	if (ofGetFrameNum() % 300 == 0) {
		
		this->direction *= -1;
	}

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

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

			float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());
			if (distance < 80) {

				this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), 0.75 * this->direction);
				this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), 0.75 * this->direction);
			}
		}
	}

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


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

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

		float radius = this->circles[i]->getRadius();
		ofPoint point = this->circles[i]->getPosition();
		ofPoint velocity = this->circles[i]->getVelocity();
		
		ofSetColor(this->circles_color[i]);

		ofPushMatrix();
		ofTranslate(point);

		if (velocity.length() < radius) {

			ofDrawCircle(ofPoint(), radius);
		}
		else {

			float velocity_deg = atan2f(velocity.y, velocity.x) * RAD_TO_DEG + 180;
			ofBeginShape();
			for (int deg = velocity_deg + 90; deg < velocity_deg + 270; deg++) {

				ofVertex(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));
			}
			ofVertex(-velocity * 2);
			ofEndShape(true);
		}

		ofPopMatrix();
	}
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(239);

ofSetWindowTitle("Insta");

ofSetColor(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 < 255; i++) {

float radius = 12;

auto circle = make_shared<ofxBox2dCircle>();

circle->setPhysics(1.0, 0.63, 0.1);

circle->setup(this->box2d.getWorld(), ofRandom(ofGetWidth() / 2), ofRandom(ofGetHeight() / 2), radius);

this->circles.push_back(circle);

ofColor circle_color;

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

this->circles_color.push_back(circle_color);

}

this->direction = 1;

}

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

void ofApp::update() {

// Change Power Direction

if (ofGetFrameNum() % 300 == 0) {

this->direction *= -1;

}

// Circles Compute Power

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

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

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

if (distance < 80) {

this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), 0.75 * this->direction);

this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), 0.75 * this->direction);

}

// Compute box2d

this->box2d.update();

}

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

void ofApp::draw() {

// Draw Circles

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

float radius = this->circles[i]->getRadius();

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

ofPoint velocity = this->circles[i]->getVelocity();

ofSetColor(this->circles_color[i]);

ofPushMatrix();

ofTranslate(point);

if (velocity.length() < radius) {

ofDrawCircle(ofPoint(), radius);

}

else {

float velocity_deg = atan2f(velocity.y, velocity.x) * RAD_TO_DEG + 180;

ofBeginShape();

for (int deg = velocity_deg + 90; deg < velocity_deg + 270; deg++) {

ofVertex(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));

}

ofVertex(-velocity * 2);

ofEndShape(true);

}

ofPopMatrix();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180513

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