box2d – ページ 18 – プログラミング de 落描き

2018年3月20日2018年3月19日

動画 de パズル openFrameworks OpenCV ofxBox2d

[ Video ]

[ About ]
OpenCV(画像処理系)とofxBox2d(2D物理エンジン)を組み合わせて、動画のパズルを作ってみました。

本当はBoxに画像を投影してBoxの向きの概念もある3D版を作って見たかったのですが、マウスで3Dのブロックを積み上げていく適切なユーザーインターフェースが思いつかず…VR/ARが盛んなUnityとかだと良いのがありそうですね。

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofxBox2d.h"
#include "ofFbo.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;
	ofxBox2dEdge edge;

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

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

#pragma once

#include "ofMain.h"

#include "ofxBox2d.h"

#include "ofFbo.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;

ofxBox2dEdge edge;

cv::VideoCapture cap;

cv::Size cap_size;

float rect_size;

vector<cv::Mat> frames;

vector<ofImage*> images;

vector<cv::Rect> cv_rects;

};

#include "ofApp.h"

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

	ofBackground(39);
	ofSetWindowTitle("Insta");

	this->cap.open("D:\\video\\image8.mp4");
	this->cap_size = cv::Size(1280, 720);
	ofSetFrameRate(this->cap.get(CV_CAP_PROP_FPS));

	this->box2d.init();
	this->box2d.setGravity(0, 10);
	this->box2d.createBounds();
	this->box2d.setFPS(30);
	this->box2d.registerGrabbing();

	this->rect_size = 80;
	for (int x = 480; x < ofGetWidth() - 480; x += this->rect_size) {

		for (int y = 160; y <= ofGetHeight() - 160; y += this->rect_size) {

			this->rects.push_back(shared_ptr<ofxBox2dRect>(new ofxBox2dRect));
			this->rects.back().get()->setPhysics(1.0, 0.1, 1.0);
			this->rects.back().get()->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), this->rect_size, this->rect_size);

			ofImage* image = new ofImage();
			image->allocate(this->rect_size, this->rect_size, OF_IMAGE_COLOR);
			this->images.push_back(image);

			cv::Mat frame = cv::Mat(cv::Size(image->getWidth(), image->getHeight()), CV_MAKETYPE(CV_8UC3, image->getPixels().getNumChannels()), image->getPixels().getData(), 0);
			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->edge = ofxBox2dEdge();
	this->edge.addVertex(ofVec2f(300, ofGetHeight() / 3 * 2));
	this->edge.addVertex(ofVec2f(ofGetWidth() - 300, ofGetHeight() / 3 * 2));
	this->edge.create(this->box2d.getWorld());

	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();
	}

	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->edge.draw();

	this->fbo.end();
}

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

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

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofBackground(39);

ofSetWindowTitle("Insta");

this->cap.open("D:\\video\\image8.mp4");

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

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

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(30);

this->box2d.registerGrabbing();

this->rect_size = 80;

for (int x = 480; x < ofGetWidth() - 480; x += this->rect_size) {

for (int y = 160; y <= ofGetHeight() - 160; y += this->rect_size) {

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

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

this->rects.back().get()->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), this->rect_size, this->rect_size);

ofImage* image = new ofImage();

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

this->images.push_back(image);

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

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->edge = ofxBox2dEdge();

this->edge.addVertex(ofVec2f(300, ofGetHeight() / 3 * 2));

this->edge.addVertex(ofVec2f(ofGetWidth() - 300, ofGetHeight() / 3 * 2));

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

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();

}

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->edge.draw();

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/Insta20180319

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2018年2月4日2018年2月3日

動画のフレーム差分でParticleを生成 openFrameworks OpenCV ofxBox2d

[ Video ]

[ About ]
昨日のWebカメラを動画データに置き換えました。重かったので、書き出した画像をつなげて動画にしてあります。

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofFbo.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 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) {};

	ofFbo fbo;
	ofPixels pixels;
	ofImage save_image;

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<float> circles_life;
	vector<ofColor> circles_color;
	
	cv::VideoCapture cap;
	ofVec2f cap_size;
	cv::Mat pre_frame;
	cv::Mat frame;
	ofImage image;
};

#pragma once

#include "ofMain.h"

#include "ofFbo.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 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) {};

ofFbo fbo;

ofPixels pixels;

ofImage save_image;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<float> circles_life;

vector<ofColor> circles_color;

cv::VideoCapture cap;

ofVec2f cap_size;

cv::Mat pre_frame;

cv::Mat frame;

ofImage image;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	ofSetFrameRate(25);
	ofBackground(0);
	ofSetWindowTitle("Insta");

	this->box2d.init();
	this->box2d.setGravity(0, 50);
	this->box2d.createBounds();
	this->box2d.setFPS(25);
	//this->box2d.registerGrabbing();

	this->cap.open("city3.mp4");
	this->cap_size = ofVec2f(this->cap.get(CV_CAP_PROP_FRAME_WIDTH), this->cap.get(CV_CAP_PROP_FRAME_HEIGHT));
	this->cap_size *= 0.33;

	this->image.allocate(this->cap_size.x, this->cap_size.y, OF_IMAGE_COLOR);
	this->frame = cv::Mat(this->image.getHeight(), this->image.getWidth(), CV_MAKETYPE(CV_8UC3, this->image.getPixels().getNumChannels()), this->image.getPixels().getData(), 0);
	
	this->fbo.allocate(ofGetWidth(), ofGetHeight());
}

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

	cv::Mat src;
	this->cap >> src;
	
	if (src.empty()) {
		return;
	}

	cv::flip(src, src, 1);
	cv::cvtColor(src, src, cv::COLOR_BGR2RGB);
	cv::resize(src, this->frame, cv::Size(this->cap_size.x, this->cap_size.y));

	float span = 10;
	if(ofGetFrameNum() > 10) {

		cv::Mat gap = this->pre_frame - this->frame;
		vector<ofVec2f> gap_points;

		for (int y = 0; y < gap.rows; y += span) {

			cv::Vec3b* value = gap.ptr<cv::Vec3b>(y, 0);
			for (int x = 0; x < gap.cols; x += span) {

				cv::Vec3b v = value[x];
				if ((v[0] + v[1] + v[2]) > 32) {
					 
					shared_ptr<ofxBox2dCircle> circle = shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle);
					circle.get()->setPhysics(3.0, 0.5, 0.1);
					circle.get()->setup(this->box2d.getWorld(), x + ofGetWidth() / 2 - this->image.getWidth() / 2 + ofRandom(-span / 2, span / 2), y + 30 + ofRandom(-span / 2, span / 2), span / 4);
					this->circles.push_back(circle);

					this->circles_life.push_back(255);

					ofColor c;
					c.setHsb(ofRandom(255), 220, 220);
					this->circles_color.push_back(c);

				}
			}
		}
	}
	this->frame.copyTo(this->pre_frame);
	this->image.update();

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

	ofSetColor(255);
	this->image.draw(ofGetWidth() / 2 - this->image.getWidth() / 2, 30);

	for (int i = this->circles.size() - 1; i >= 0; i--) {
		
		this->circles_life[i] -= 8;
		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);
		}
		else {

			ofSetColor(this->circles_color[i], this->circles_life[i] + 128);
			ofDrawCircle(this->circles[i].get()->getPosition(), this->circles[i].get()->getRadius());
		}
	}

	this->fbo.end();

	//this->fbo.readToPixels(pixels);
	//this->save_image.setFromPixels(pixels);
	//this->save_image.save(std::to_string(ofGetFrameNum()) + ".png", OF_IMAGE_QUALITY_BEST);

	this->box2d.update();
}

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

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

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(25);

ofBackground(0);

ofSetWindowTitle("Insta");

this->box2d.init();

this->box2d.setGravity(0, 50);

this->box2d.createBounds();

this->box2d.setFPS(25);

//this->box2d.registerGrabbing();

this->cap.open("city3.mp4");

this->cap_size = ofVec2f(this->cap.get(CV_CAP_PROP_FRAME_WIDTH), this->cap.get(CV_CAP_PROP_FRAME_HEIGHT));

this->cap_size *= 0.33;

this->image.allocate(this->cap_size.x, this->cap_size.y, OF_IMAGE_COLOR);

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

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

}

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

void ofApp::update() {

cv::Mat src;

this->cap >> src;

if (src.empty()) {

return;

}

cv::flip(src, src, 1);

cv::cvtColor(src, src, cv::COLOR_BGR2RGB);

cv::resize(src, this->frame, cv::Size(this->cap_size.x, this->cap_size.y));

float span = 10;

if(ofGetFrameNum() > 10) {

cv::Mat gap = this->pre_frame - this->frame;

vector<ofVec2f> gap_points;

for (int y = 0; y < gap.rows; y += span) {

cv::Vec3b* value = gap.ptr<cv::Vec3b>(y, 0);

for (int x = 0; x < gap.cols; x += span) {

cv::Vec3b v = value[x];

if ((v[0] + v[1] + v[2]) > 32) {

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

circle.get()->setPhysics(3.0, 0.5, 0.1);

circle.get()->setup(this->box2d.getWorld(), x + ofGetWidth() / 2 - this->image.getWidth() / 2 + ofRandom(-span / 2, span / 2), y + 30 + ofRandom(-span / 2, span / 2), span / 4);

this->circles.push_back(circle);

this->circles_life.push_back(255);

ofColor c;

c.setHsb(ofRandom(255), 220, 220);

this->circles_color.push_back(c);

}

this->frame.copyTo(this->pre_frame);

this->image.update();

this->fbo.begin();

ofClear(0);

ofBackground(0);

ofSetColor(255);

this->image.draw(ofGetWidth() / 2 - this->image.getWidth() / 2, 30);

for (int i = this->circles.size() - 1; i >= 0; i--) {

this->circles_life[i] -= 8;

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);

}

else {

ofSetColor(this->circles_color[i], this->circles_life[i] + 128);

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

}

this->fbo.end();

//this->fbo.readToPixels(pixels);

//this->save_image.setFromPixels(pixels);

//this->save_image.save(std::to_string(ofGetFrameNum()) + ".png", OF_IMAGE_QUALITY_BEST);

this->box2d.update();

}

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

void ofApp::draw() {

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

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180203

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2018年2月3日2018年2月2日

OpenCVでフレームの差分をとってParticle生成 openFrameworks ofxBox2d OpenCV

[ Video ]

[ About ]
OpenCVでWebカメラの映像を取得、毎フレームの差分を取得して、その情報をもとにParticleを生成しています。画像に動きのある部分からカラフルな玉が発生します。

本当はもうちょっと細かな粒子のようなものや、映像の色を反映した破片のようなオブジェクトを作りたかったのですが、リアルタイムだと処理性能的に厳しかったです。また今度、MPEGファイルから生成するような形で試してみようと思います。

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofFbo.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 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) {};

	ofFbo fbo;

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<ofColor> circles_color;
	
	cv::VideoCapture cap;
	cv::Mat pre_frame;
	cv::Mat frame;
	ofImage image;
};

#pragma once

#include "ofMain.h"

#include "ofFbo.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 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) {};

ofFbo fbo;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<ofColor> circles_color;

cv::VideoCapture cap;

cv::Mat pre_frame;

cv::Mat frame;

ofImage image;

};

#include "ofApp.h"

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

	this->box2d.init();
	this->box2d.setGravity(0, 50);
	//this->box2d.createBounds();
	this->box2d.setFPS(30);
	//this->box2d.registerGrabbing();

	this->cap.open(1);
	this->image.allocate(this->cap.get(CV_CAP_PROP_FRAME_WIDTH), this->cap.get(CV_CAP_PROP_FRAME_HEIGHT), OF_IMAGE_COLOR);
	this->frame = cv::Mat(this->image.getHeight(), this->image.getWidth(), CV_MAKETYPE(CV_8UC3, this->image.getPixels().getNumChannels()), this->image.getPixels().getData(), 0);
	
	this->fbo.allocate(ofGetWidth(), ofGetHeight());
}

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

	cv::Mat src;
	this->cap >> src;
	cv::flip(src, src, 1);
	cv::cvtColor(src, this->frame, cv::COLOR_BGR2RGB);


	float span = 15;
	if (ofGetFrameNum() > 10) {

		cv::Mat gap = this->pre_frame - src;
		vector<ofVec2f> gap_points;

		for (int y = 0; y < gap.rows; y += span) {

			cv::Vec3b* value = gap.ptr<cv::Vec3b>(y, 0);
			for (int x = 0; x < gap.cols; x += span) {

				cv::Vec3b v = value[x];
				if ((v[0] + v[1] + v[2]) > 32) {
					 
					shared_ptr<ofxBox2dCircle> circle = shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle);
					circle.get()->setPhysics(3.0, 0.5, 0.1);
					circle.get()->setup(this->box2d.getWorld(), x + ofGetWidth() / 2 - this->image.getWidth() / 2 + ofRandom(-span / 2, span / 2), y + 30 + ofRandom(-span / 2, span / 2), span / 2);
					this->circles.push_back(circle);

					ofColor c;
					c.setHsb(ofRandom(255), 220, 220);
					this->circles_color.push_back(c);

				}
			}
		}
	}
	this->pre_frame = src;
	this->image.update();

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

	ofSetColor(255);
	this->image.draw(ofGetWidth() / 2 - this->image.getWidth() / 2, 30);

	for (int i = this->circles.size() - 1; i >= 0; i--) {
		
		if (this->circles[i].get()->getPosition().y > ofGetHeight()) {

			this->circles[i].get()->destroy();
			this->circles.erase(this->circles.begin() + i);
			this->circles_color.erase(this->circles_color.begin() + i);
		}
		else {

			ofSetColor(this->circles_color[i]);
			ofDrawCircle(this->circles[i].get()->getPosition(), this->circles[i].get()->getRadius());
		}
	}

	this->fbo.end();

	this->box2d.update();
}

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

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

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofBackground(0);

ofSetWindowTitle("Insta");

this->box2d.init();

this->box2d.setGravity(0, 50);

//this->box2d.createBounds();

this->box2d.setFPS(30);

//this->box2d.registerGrabbing();

this->cap.open(1);

this->image.allocate(this->cap.get(CV_CAP_PROP_FRAME_WIDTH), this->cap.get(CV_CAP_PROP_FRAME_HEIGHT), OF_IMAGE_COLOR);

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

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

}

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

void ofApp::update() {

cv::Mat src;

this->cap >> src;

cv::flip(src, src, 1);

cv::cvtColor(src, this->frame, cv::COLOR_BGR2RGB);

float span = 15;

if (ofGetFrameNum() > 10) {

cv::Mat gap = this->pre_frame - src;

vector<ofVec2f> gap_points;

for (int y = 0; y < gap.rows; y += span) {

cv::Vec3b* value = gap.ptr<cv::Vec3b>(y, 0);

for (int x = 0; x < gap.cols; x += span) {

cv::Vec3b v = value[x];

if ((v[0] + v[1] + v[2]) > 32) {

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

circle.get()->setPhysics(3.0, 0.5, 0.1);

circle.get()->setup(this->box2d.getWorld(), x + ofGetWidth() / 2 - this->image.getWidth() / 2 + ofRandom(-span / 2, span / 2), y + 30 + ofRandom(-span / 2, span / 2), span / 2);

this->circles.push_back(circle);

ofColor c;

c.setHsb(ofRandom(255), 220, 220);

this->circles_color.push_back(c);

}

this->pre_frame = src;

this->image.update();

this->fbo.begin();

ofClear(0);

ofSetColor(255);

this->image.draw(ofGetWidth() / 2 - this->image.getWidth() / 2, 30);

for (int i = this->circles.size() - 1; i >= 0; i--) {

if (this->circles[i].get()->getPosition().y > ofGetHeight()) {

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

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

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

}

else {

ofSetColor(this->circles_color[i]);

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

}

this->fbo.end();

this->box2d.update();

}

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

void ofApp::draw() {

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

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180202

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