box2d – ページ 4 – プログラミング de 落描き

2021年2月17日2021年2月17日

PCD 2021 Desert. Draw by openFrameworks

[ Video ]

[ About ]

For PCD Japan 2021, we organize Daily Coding Week from Feb 13th! We made a "prompt list" as themes of the day, and those works tweeted with #PCD2021 by 23:59 (UTC+9) will be automatically included in our 3D online gallery! Use your favorite tool (not only p5/p5js) for submission! pic.twitter.com/WjcOwu1fnP

— PCD Japan (@PCD_Tokyo) February 11, 2021

[ 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>> circle_list;
	vector<float> radius_list;
	vector<float> life_list;
};

#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>> circle_list;

vector<float> radius_list;

vector<float> life_list;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);

	this->font.loadFont("fonts/Kazesawa-Bold.ttf", 100, true, true, true);

	this->box2d.init();
	this->box2d.setGravity(0, 50);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();
}

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

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

		this->life_list[i] -= 1;

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

			this->circle_list.erase(this->circle_list.begin() + i);
			this->radius_list.erase(this->radius_list.begin() + i);
			this->life_list.erase(this->life_list.begin() + i);
		}
	}

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

		auto radius = ofRandom(1, 3);

		auto circle = make_shared<ofxBox2dCircle>();
		circle->setPhysics(0.5, 0.03, 0.1);
		circle->setup(this->box2d.getWorld(), ofRandom(ofGetWidth() * 0.5 - radius, ofGetWidth() * 0.5 + radius), 100 + radius, radius);
		circle->setRotation(ofRandom(360));
		this->circle_list.push_back(circle);
		this->radius_list.push_back(radius);
		this->life_list.push_back(400);
	}

	this->box2d.update();
}

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

	string word = "PCD 2021";
	this->font.drawStringAsShapes(word, ofGetWidth() * 0.5 + this->font.stringWidth(word) * -0.5, ofGetHeight() * 0.5 + this->font.stringHeight(word) * 0.5);

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

		ofDrawCircle(glm::vec2(this->circle_list[i]->getPosition()), this->radius_list[i]);
	}
}


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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(39);

this->font.loadFont("fonts/Kazesawa-Bold.ttf", 100, true, true, true);

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

}

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

void ofApp::update() {

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

this->life_list[i] -= 1;

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

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

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

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

}

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

auto radius = ofRandom(1, 3);

auto circle = make_shared<ofxBox2dCircle>();

circle->setPhysics(0.5, 0.03, 0.1);

circle->setup(this->box2d.getWorld(), ofRandom(ofGetWidth() * 0.5 - radius, ofGetWidth() * 0.5 + radius), 100 + radius, radius);

circle->setRotation(ofRandom(360));

this->circle_list.push_back(circle);

this->radius_list.push_back(radius);

this->life_list.push_back(400);

}

this->box2d.update();

}

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

void ofApp::draw() {

string word = "PCD 2021";

this->font.drawStringAsShapes(word, ofGetWidth() * 0.5 + this->font.stringWidth(word) * -0.5, ofGetHeight() * 0.5 + this->font.stringHeight(word) * 0.5);

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

ofDrawCircle(glm::vec2(this->circle_list[i]->getPosition()), this->radius_list[i]);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210217

2020年12月29日

Parallel capture. Draw by openFrameworks

[ Video ]

[ About ]
パラレルキャプチャ。

Parallel capture.

[ Source ]

#pragma once
#include "ofMain.h"
#include "opencv2/opencv.hpp"
#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) {};

	cv::VideoCapture cap;
	cv::Size cap_size;
	int number_of_frames;
	vector<cv::Mat> frame_list;

	ofImage image;
	cv::Mat frame;
	ofMesh mesh;

	vector<glm::vec3> draw_location_list;
	vector<int> draw_index_list;

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dRect>> box2d_rect_list;
	vector<int> box2d_frame_index_list;
	vector<float> box2d_life_list;
};

#pragma once

#include "ofMain.h"

#include "opencv2/opencv.hpp"

#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) {};

cv::VideoCapture cap;

cv::Size cap_size;

int number_of_frames;

vector<cv::Mat> frame_list;

ofImage image;

cv::Mat frame;

ofMesh mesh;

vector<glm::vec3> draw_location_list;

vector<int> draw_index_list;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dRect>> box2d_rect_list;

vector<int> box2d_frame_index_list;

vector<float> box2d_life_list;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(255);
	ofSetLineWidth(3);

	this->cap.open("D:\\MP4\\Pexels Videos 2441067.mp4");
	this->cap_size = cv::Size(128, 72);

	this->image.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);
	this->frame = cv::Mat(cv::Size(this->image.getWidth(), this->image.getHeight()), CV_MAKETYPE(CV_8UC3, this->image.getPixels().getNumChannels()), this->image.getPixels().getData(), 0);

	int skip_frame = 24 * 120;
	this->number_of_frames = this->cap.get(cv::CAP_PROP_FRAME_COUNT) - skip_frame;
	this->cap.set(cv::CAP_PROP_POS_FRAMES, skip_frame);
	for (int i = 0; i < this->number_of_frames; i++) {

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

			continue;
		}

		cv::resize(src, tmp, this->cap_size);
		cv::cvtColor(tmp, tmp, cv::COLOR_BGR2RGB);

		this->frame_list.push_back(tmp);
	}

	this->mesh.addVertex(glm::vec3(this->cap_size.width * -0.5, this->cap_size.height * -0.5, 0));
	this->mesh.addVertex(glm::vec3(this->cap_size.width * 0.5,  this->cap_size.height * -0.5, 0));
	this->mesh.addVertex(glm::vec3(this->cap_size.width * 0.5,  this->cap_size.height * 0.5, 0));
	this->mesh.addVertex(glm::vec3(this->cap_size.width * -0.5, this->cap_size.height * 0.5, 0));
	
	this->mesh.addTexCoord(glm::vec3(0, 0, 0));
	this->mesh.addTexCoord(glm::vec3(this->cap_size.width, 0, 0));
	this->mesh.addTexCoord(glm::vec3(this->cap_size.width, this->cap_size.height, 0));
	this->mesh.addTexCoord(glm::vec3(0, this->cap_size.height, 0));

	this->mesh.addIndex(0); mesh.addIndex(1); mesh.addIndex(2);
	this->mesh.addIndex(0); mesh.addIndex(2); mesh.addIndex(3);

	for (int x = 40 + this->cap_size.width * 0.5; x <= ofGetWidth(); x += this->cap_size.width) {

		for (int y = 40 + this->cap_size.height * 0.5; y <= ofGetHeight() * 0.5; y += this->cap_size.height) {

			this->draw_location_list.push_back(glm::vec3(x, y, 0));
			this->draw_index_list.push_back(ofRandom(this->number_of_frames));
		}
	}

	this->box2d.init();
	this->box2d.setGravity(0, 50);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();
}

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

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

		int n = int(ofMap(ofNoise(this->draw_location_list[i].x * 0.5625 * 0.005, this->draw_location_list[i].y * 0.005, ofGetFrameNum() * 0.0005), 0, 1, 0, this->number_of_frames * 3)) % this->number_of_frames;
		this->draw_index_list[i] = n;
	}

	for (int i = this->box2d_rect_list.size() - 1; i > -1; i--) {

		this->box2d_life_list[i] -= 3;
		if (this->box2d_life_list[i] < 0) {

			this->box2d_rect_list.erase(this->box2d_rect_list.begin() + i);
			this->box2d_frame_index_list.erase(this->box2d_frame_index_list.begin() + i);
			this->box2d_life_list.erase(this->box2d_life_list.begin() + i);
		}
	}

	if (ofGetFrameNum() % 12 == 0) {

		int location_index = ofRandom(this->draw_location_list.size());
		int frame_index = this->draw_index_list[location_index];

		auto box2d_rect = make_shared<ofxBox2dRect>();
		box2d_rect->setPhysics(0.5, 0.21, 0.4);
		box2d_rect->setup(this->box2d.getWorld(), this->draw_location_list[location_index].x, this->draw_location_list[location_index].y, this->cap_size.width, this->cap_size.height);

		this->box2d_rect_list.push_back(box2d_rect);
		this->box2d_frame_index_list.push_back(frame_index);
		this->box2d_life_list.push_back(512);
	}

	this->box2d.update();
}

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

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

		this->frame_list[this->draw_index_list[i]].copyTo(this->frame);
		this->image.update();

		ofPushMatrix();
		ofTranslate(this->draw_location_list[i]);

		ofSetColor(255);
		ofFill();
		this->image.bind();
		mesh.draw();
		this->image.unbind();

		ofSetColor(39);
		ofNoFill();
		ofDrawRectangle(this->cap_size.width * -0.5, this->cap_size.height * -0.5, this->cap_size.width, this->cap_size.height);

		ofPopMatrix();
	}

	for (int i = 0; i < this->box2d_rect_list.size(); i++) {

		this->frame_list[this->box2d_frame_index_list[i]].copyTo(this->frame);
		this->image.update();

		ofPushMatrix();
		ofTranslate(this->box2d_rect_list[i]->getPosition());
		ofRotate(this->box2d_rect_list[i]->getRotation());

		auto alpha = this->box2d_life_list[i] > 255 ? 255 : this->box2d_life_list[i];

		ofSetColor(255, alpha);
		ofFill();
		this->image.bind();
		mesh.draw();
		this->image.unbind();

		ofSetColor(39);
		ofNoFill();
		ofDrawRectangle(this->cap_size.width * -0.5, this->cap_size.height * -0.5, this->cap_size.width, this->cap_size.height);

		ofPopMatrix();
	}
}

//--------------------------------------------------------------
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(239);

ofSetColor(255);

ofSetLineWidth(3);

this->cap.open("D:\\MP4\\Pexels Videos 2441067.mp4");

this->cap_size = cv::Size(128, 72);

this->image.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);

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

int skip_frame = 24 * 120;

this->number_of_frames = this->cap.get(cv::CAP_PROP_FRAME_COUNT) - skip_frame;

this->cap.set(cv::CAP_PROP_POS_FRAMES, skip_frame);

for (int i = 0; i < this->number_of_frames; i++) {

cv::Mat src, tmp;

this->cap >> src;

if (src.empty()) {

continue;

}

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

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

this->frame_list.push_back(tmp);

}

this->mesh.addVertex(glm::vec3(this->cap_size.width * -0.5, this->cap_size.height * -0.5, 0));

this->mesh.addVertex(glm::vec3(this->cap_size.width * 0.5, this->cap_size.height * -0.5, 0));

this->mesh.addVertex(glm::vec3(this->cap_size.width * 0.5, this->cap_size.height * 0.5, 0));

this->mesh.addVertex(glm::vec3(this->cap_size.width * -0.5, this->cap_size.height * 0.5, 0));

this->mesh.addTexCoord(glm::vec3(0, 0, 0));

this->mesh.addTexCoord(glm::vec3(this->cap_size.width, 0, 0));

this->mesh.addTexCoord(glm::vec3(this->cap_size.width, this->cap_size.height, 0));

this->mesh.addTexCoord(glm::vec3(0, this->cap_size.height, 0));

this->mesh.addIndex(0); mesh.addIndex(1); mesh.addIndex(2);

this->mesh.addIndex(0); mesh.addIndex(2); mesh.addIndex(3);

for (int x = 40 + this->cap_size.width * 0.5; x <= ofGetWidth(); x += this->cap_size.width) {

for (int y = 40 + this->cap_size.height * 0.5; y <= ofGetHeight() * 0.5; y += this->cap_size.height) {

this->draw_location_list.push_back(glm::vec3(x, y, 0));

this->draw_index_list.push_back(ofRandom(this->number_of_frames));

}

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

}

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

void ofApp::update() {

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

int n = int(ofMap(ofNoise(this->draw_location_list[i].x * 0.5625 * 0.005, this->draw_location_list[i].y * 0.005, ofGetFrameNum() * 0.0005), 0, 1, 0, this->number_of_frames * 3)) % this->number_of_frames;

this->draw_index_list[i] = n;

}

for (int i = this->box2d_rect_list.size() - 1; i > -1; i--) {

this->box2d_life_list[i] -= 3;

if (this->box2d_life_list[i] < 0) {

this->box2d_rect_list.erase(this->box2d_rect_list.begin() + i);

this->box2d_frame_index_list.erase(this->box2d_frame_index_list.begin() + i);

this->box2d_life_list.erase(this->box2d_life_list.begin() + i);

}

if (ofGetFrameNum() % 12 == 0) {

int location_index = ofRandom(this->draw_location_list.size());

int frame_index = this->draw_index_list[location_index];

auto box2d_rect = make_shared<ofxBox2dRect>();

box2d_rect->setPhysics(0.5, 0.21, 0.4);

box2d_rect->setup(this->box2d.getWorld(), this->draw_location_list[location_index].x, this->draw_location_list[location_index].y, this->cap_size.width, this->cap_size.height);

this->box2d_rect_list.push_back(box2d_rect);

this->box2d_frame_index_list.push_back(frame_index);

this->box2d_life_list.push_back(512);

}

this->box2d.update();

}

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

void ofApp::draw() {

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

this->frame_list[this->draw_index_list[i]].copyTo(this->frame);

this->image.update();

ofPushMatrix();

ofTranslate(this->draw_location_list[i]);

ofSetColor(255);

ofFill();

this->image.bind();

mesh.draw();

this->image.unbind();

ofSetColor(39);

ofNoFill();

ofDrawRectangle(this->cap_size.width * -0.5, this->cap_size.height * -0.5, this->cap_size.width, this->cap_size.height);

ofPopMatrix();

}

for (int i = 0; i < this->box2d_rect_list.size(); i++) {

this->frame_list[this->box2d_frame_index_list[i]].copyTo(this->frame);

this->image.update();

ofPushMatrix();

ofTranslate(this->box2d_rect_list[i]->getPosition());

ofRotate(this->box2d_rect_list[i]->getRotation());

auto alpha = this->box2d_life_list[i] > 255 ? 255 : this->box2d_life_list[i];

ofSetColor(255, alpha);

ofFill();

this->image.bind();

mesh.draw();

this->image.unbind();

ofSetColor(39);

ofNoFill();

ofDrawRectangle(this->cap_size.width * -0.5, this->cap_size.height * -0.5, this->cap_size.width, this->cap_size.height);

ofPopMatrix();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20201229/

2020年10月26日2020年10月26日

Color reverse. Draw by openFrameworks

[ Video ]

[ About ]
色反転。

Color reverse.

[ 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) {};

	ofFbo fbo1;
	ofFbo fbo2;
	ofShader shader;

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dCircle>> circle_list;
	vector<float> radius_list;
	vector<float> life_list;
};

#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) {};

ofFbo fbo1;

ofFbo fbo2;

ofShader shader;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circle_list;

vector<float> radius_list;

vector<float> life_list;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(0);
	ofEnableDepthTest();

	this->fbo1.allocate(ofGetWidth(), ofGetHeight());
	this->fbo2.allocate(ofGetWidth(), ofGetHeight());
	this->shader.load("shader/shader.vert", "shader/shader.frag");

	this->box2d.init();
	this->box2d.setGravity(0, 50);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();
}

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

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

		this->life_list[i] -= 0.75;

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

			this->circle_list.erase(this->circle_list.begin() + i);
			this->radius_list.erase(this->radius_list.begin() + i);
			this->life_list.erase(this->life_list.begin() + i);
		}
	}

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

		auto radius = ofRandom(10, 30);

		auto circle = make_shared<ofxBox2dCircle>();
		circle->setPhysics(0.5, 0.83, 0.1);
		circle->setup(this->box2d.getWorld(), ofRandom(ofGetWidth() * 0.5 - radius, ofGetWidth() * 0.5 + radius), radius, radius);
		circle->setRotation(ofRandom(360));
		this->circle_list.push_back(circle);
		this->radius_list.push_back(radius);
		this->life_list.push_back(255);
	}

	this->box2d.update();


	this->fbo1.begin();
	ofClear(0);

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

		ofDrawCircle(glm::vec2(this->circle_list[i]->getPosition()), this->radius_list[i]);
	}

	this->fbo1.end();

	this->fbo2.begin();
	ofClear(0);

	for (int x = 0; x < ofGetWidth(); x += 120) {

		ofDrawRectangle(x, 0, 60, ofGetHeight());
	}

	this->fbo2.end();
}

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

	ofFill();
	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex1", this->fbo1.getTexture(), 1);
	this->shader.setUniformTexture("tex2", this->fbo2.getTexture(), 2);

	ofDrawRectangle(glm::vec2(0, 0), ofGetWidth(), ofGetHeight());

	this->shader.end();
}

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

	ofGLWindowSettings settings;
	settings.setGLVersion(3, 2);
	settings.setSize(720, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(0);

ofEnableDepthTest();

this->fbo1.allocate(ofGetWidth(), ofGetHeight());

this->fbo2.allocate(ofGetWidth(), ofGetHeight());

this->shader.load("shader/shader.vert", "shader/shader.frag");

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

}

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

void ofApp::update() {

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

this->life_list[i] -= 0.75;

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

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

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

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

}

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

auto radius = ofRandom(10, 30);

auto circle = make_shared<ofxBox2dCircle>();

circle->setPhysics(0.5, 0.83, 0.1);

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

circle->setRotation(ofRandom(360));

this->circle_list.push_back(circle);

this->radius_list.push_back(radius);

this->life_list.push_back(255);

}

this->box2d.update();

this->fbo1.begin();

ofClear(0);

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

ofDrawCircle(glm::vec2(this->circle_list[i]->getPosition()), this->radius_list[i]);

}

this->fbo1.end();

this->fbo2.begin();

ofClear(0);

for (int x = 0; x < ofGetWidth(); x += 120) {

ofDrawRectangle(x, 0, 60, ofGetHeight());

}

this->fbo2.end();

}

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

void ofApp::draw() {

ofFill();

this->shader.begin();

this->shader.setUniform1f("time", ofGetElapsedTimef());

this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());

this->shader.setUniformTexture("tex1", this->fbo1.getTexture(), 1);

this->shader.setUniformTexture("tex2", this->fbo2.getTexture(), 2);

ofDrawRectangle(glm::vec2(0, 0), ofGetWidth(), ofGetHeight());

this->shader.end();

}

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

int main() {

ofGLWindowSettings settings;

settings.setGLVersion(3, 2);

settings.setSize(720, 720);

ofCreateWindow(settings);

ofRunApp(new ofApp());

}

#version 150

uniform mat4 modelViewProjectionMatrix;
in vec4 position;
in vec2 texcoord;
out vec2 texCoordVarying;

void main(){

	texCoordVarying = texcoord;
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

in vec2 texcoord;

out vec2 texCoordVarying;

void main(){

texCoordVarying = texcoord;

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex1;
uniform sampler2DRect tex2;

in vec2 texCoordVarying;
out vec4 outputColor;

void main() {

  vec4 t1 = texture(tex1, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));
  vec4 t2 = texture(tex2, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));
  
  vec4 c;
  if(t1 == t2){
  	
  	c = vec4(vec3(0.937), 1.0);
  }else{
  
  	c = vec4(vec3(0.153), 1.0);
  }
  
  outputColor = c;
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex1;

uniform sampler2DRect tex2;

in vec2 texCoordVarying;

out vec4 outputColor;

void main() {

vec4 t1 = texture(tex1, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

vec4 t2 = texture(tex2, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

vec4 c;

if(t1 == t2){

c = vec4(vec3(0.937), 1.0);

}else{

c = vec4(vec3(0.153), 1.0);

}

outputColor = c;

}

[ Link ]
https://github.com/junkiyoshi/Insta20201026/

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