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2021年6月17日2021年6月17日

Rainy mask. Draw by openFrameworks

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Rainy mask.

[ 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;
	float radius;
	vector<shared_ptr<ofxBox2dCircle>> circle_list;
	vector<vector<glm::vec2>> log_list;
	vector<float> life_list;
	vector<ofColor> color_list;

	ofImage image;
	ofFbo fbo;
};

#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;

float radius;

vector<shared_ptr<ofxBox2dCircle>> circle_list;

vector<vector<glm::vec2>> log_list;

vector<float> life_list;

vector<ofColor> color_list;

ofImage image;

ofFbo fbo;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);

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

	this->radius = 15;

	this->image.loadImage("images/lenna.png");
	this->image.resize(720, 720);
	this->fbo.allocate(720, 720);
}

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

	vector<ofColor> base_color = { ofColor(255, 255, 0), ofColor(255, 0, 255), ofColor(0, 255, 255) };

	if (ofGetFrameNum() % 1 == 0) {

		auto circle = make_shared<ofxBox2dCircle>();
		circle->setPhysics(0.5, 0.83, 0.05);
		circle->setup(this->box2d.getWorld(), ofRandom(150, ofGetWidth() - 150), this->radius, this->radius);
		this->circle_list.push_back(circle);

		vector<glm::vec2> log;
		this->log_list.push_back(log);
		this->life_list.push_back(80);
		this->color_list.push_back(base_color[(int)ofRandom(base_color.size())]);
	}

	this->box2d.update();

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

		this->log_list[i].push_back(glm::vec2(this->circle_list[i]->getPosition().x, this->circle_list[i]->getPosition().y));
		while (this->log_list[i].size() > 20) {

			this->log_list[i].erase(this->log_list[i].begin());
		}

		this->life_list[i] -= 1;
		if (this->life_list[i] < 0) {

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

	this->fbo.begin();
	ofClear(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

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

		if (this->log_list[i].size() < 2) continue;

		if (this->life_list[i] < 15) {
			
			ofSetColor(this->color_list[i], ofMap(this->life_list[i], 0, 15, 0, 255));
		}
		else {

			ofSetColor(this->color_list[i]);
		}

		ofMesh mesh;
		vector<glm::vec3> right, left, frame;
		glm::vec3 last_location;
		float last_theta;

		for (int k = 0; k < this->log_list[i].size() - 1; k++) {

			auto location = glm::vec3(this->log_list[i][k], 0);
			auto next = glm::vec3(this->log_list[i][k + 1], 0);

			auto direction = next - location;
			auto theta = atan2(direction.y, direction.x);

			right.push_back(location + glm::vec3(ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * cos(theta + PI * 0.5), ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * sin(theta + PI * 0.5), 0));
			left.push_back(location + glm::vec3(ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * cos(theta - PI * 0.5), ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * sin(theta - PI * 0.5), 0));

			last_location = location;
			last_theta = theta;
		}

		for (int k = 0; k < right.size(); k++) {

			mesh.addVertex(left[k]);
			mesh.addVertex(right[k]);
		}

		for (int k = 0; k < mesh.getNumVertices() - 2; k += 2) {

			mesh.addIndex(k + 0); mesh.addIndex(k + 1); mesh.addIndex(k + 3);
			mesh.addIndex(k + 0); mesh.addIndex(k + 2); mesh.addIndex(k + 3);
		}

		auto tmp_head_size = ofMap(log_list[i].size() - 2, 0, log_list[i].size(), 0.1, head_size);
		mesh.addVertex(last_location);

		int index = mesh.getNumVertices();
		for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

			mesh.addVertex(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0));
		}

		for (int i = index; i < mesh.getNumVertices() - 1; i++) {

			mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1);
		}

		mesh.draw();
	}

	ofDisableBlendMode();
	this->fbo.end();
	
	this->image.getTextureReference().setAlphaMask(this->fbo.getTexture());
	this->image.update();
}

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

	ofSetColor(255);
	this->image.draw(0, 0);
}

//--------------------------------------------------------------
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(39);

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

this->radius = 15;

this->image.loadImage("images/lenna.png");

this->image.resize(720, 720);

this->fbo.allocate(720, 720);

}

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

void ofApp::update() {

vector<ofColor> base_color = { ofColor(255, 255, 0), ofColor(255, 0, 255), ofColor(0, 255, 255) };

if (ofGetFrameNum() % 1 == 0) {

auto circle = make_shared<ofxBox2dCircle>();

circle->setPhysics(0.5, 0.83, 0.05);

circle->setup(this->box2d.getWorld(), ofRandom(150, ofGetWidth() - 150), this->radius, this->radius);

this->circle_list.push_back(circle);

vector<glm::vec2> log;

this->log_list.push_back(log);

this->life_list.push_back(80);

this->color_list.push_back(base_color[(int)ofRandom(base_color.size())]);

}

this->box2d.update();

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

this->log_list[i].push_back(glm::vec2(this->circle_list[i]->getPosition().x, this->circle_list[i]->getPosition().y));

while (this->log_list[i].size() > 20) {

this->log_list[i].erase(this->log_list[i].begin());

}

this->life_list[i] -= 1;

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

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

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

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

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

}

this->fbo.begin();

ofClear(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

int head_size = this->radius;

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

if (this->log_list[i].size() < 2) continue;

if (this->life_list[i] < 15) {

ofSetColor(this->color_list[i], ofMap(this->life_list[i], 0, 15, 0, 255));

}

else {

ofSetColor(this->color_list[i]);

}

ofMesh mesh;

vector<glm::vec3> right, left, frame;

glm::vec3 last_location;

float last_theta;

for (int k = 0; k < this->log_list[i].size() - 1; k++) {

auto location = glm::vec3(this->log_list[i][k], 0);

auto next = glm::vec3(this->log_list[i][k + 1], 0);

auto direction = next - location;

auto theta = atan2(direction.y, direction.x);

right.push_back(location + glm::vec3(ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * cos(theta + PI * 0.5), ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * sin(theta + PI * 0.5), 0));

left.push_back(location + glm::vec3(ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * cos(theta - PI * 0.5), ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * sin(theta - PI * 0.5), 0));

last_location = location;

last_theta = theta;

}

for (int k = 0; k < right.size(); k++) {

mesh.addVertex(left[k]);

mesh.addVertex(right[k]);

}

for (int k = 0; k < mesh.getNumVertices() - 2; k += 2) {

mesh.addIndex(k + 0); mesh.addIndex(k + 1); mesh.addIndex(k + 3);

mesh.addIndex(k + 0); mesh.addIndex(k + 2); mesh.addIndex(k + 3);

}

auto tmp_head_size = ofMap(log_list[i].size() - 2, 0, log_list[i].size(), 0.1, head_size);

mesh.addVertex(last_location);

int index = mesh.getNumVertices();

for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

mesh.addVertex(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0));

}

for (int i = index; i < mesh.getNumVertices() - 1; i++) {

mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1);

}

mesh.draw();

}

ofDisableBlendMode();

this->fbo.end();

this->image.getTextureReference().setAlphaMask(this->fbo.getTexture());

this->image.update();

}

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

void ofApp::draw() {

ofSetColor(255);

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

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210617

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2021年6月16日2021年6月16日

RGB mask. Draw by openFrameworks

[ Video ]

[ About ]
RGB mask.

[ Source ]

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

	ofImage image;
	ofFbo fbo;
};

#pragma once

#include "ofMain.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) {};

ofImage image;

ofFbo fbo;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openframeworks");

	ofBackground(239);
	ofSetColor(255);
	ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER);

	this->image.loadImage("images/lenna.png");
	this->image.resize(720, 720);
	this->fbo.allocate(720, 720);
}

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

	ofSeedRandom(39);

	this->fbo.begin();
	ofClear(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

	ofTranslate(this->fbo.getWidth() * 0.5, this->fbo.getHeight() * 0.5);

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

		switch (k % 3) {

		case 0:
			ofSetColor(255, 255, 0);
			break;
		case 1:
			ofSetColor(0, 255, 255);
			break;
		case 2:
			ofSetColor(255, 0, 255);
			break;
		}
		
		auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

		ofMesh mesh;
		vector<glm::vec3> right, left;

		glm::vec3 last_location;
		float last_theta;
		int len = 100;
		int head_size = 45;

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

			auto location = glm::vec3(ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i) * 0.008), 0, 1, -280, 280), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i) * 0.008), 0, 1, -280, 280), 0);
			auto next = glm::vec3(ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i + 1) * 0.008), 0, 1, -280, 280), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i + 1) * 0.008), 0, 1, -280, 280), 0);

			auto direction = next - location;
			auto theta = atan2(direction.y, direction.x);

			right.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta + PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta + PI * 0.5), 0));
			left.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta - PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta - PI * 0.5), 0));

			last_location = location;
			last_theta = theta;
		}

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

			mesh.addVertex(left[i]);
			mesh.addVertex(right[i]);
		}

		for (int i = 0; i < mesh.getNumVertices() - 2; i += 2) {

			mesh.addIndex(i + 0); mesh.addIndex(i + 1); mesh.addIndex(i + 3);
			mesh.addIndex(i + 0); mesh.addIndex(i + 2); mesh.addIndex(i + 3);
		}

		auto tmp_head_size = ofMap(len - 2, 0, len, 0, head_size);
		mesh.addVertex(last_location);

		int index = mesh.getNumVertices();
		for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

			mesh.addVertex(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0));
		}

		for (int i = index; i < mesh.getNumVertices() - 1; i++) {

			mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1);
		}

		mesh.draw();
	}

	ofDisableBlendMode();
	this->fbo.end();

	this->image.getTextureReference().setAlphaMask(this->fbo.getTexture());
	this->image.update();
}

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

	ofSetColor(255);
	this->image.draw(ofGetWindowSize() * 0.5);
}

//--------------------------------------------------------------
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);

ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER);

this->image.loadImage("images/lenna.png");

this->image.resize(720, 720);

this->fbo.allocate(720, 720);

}

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

void ofApp::update() {

ofSeedRandom(39);

this->fbo.begin();

ofClear(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

ofTranslate(this->fbo.getWidth() * 0.5, this->fbo.getHeight() * 0.5);

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

switch (k % 3) {

case 0:

ofSetColor(255, 255, 0);

break;

case 1:

ofSetColor(0, 255, 255);

break;

case 2:

ofSetColor(255, 0, 255);

break;

}

auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

ofMesh mesh;

vector<glm::vec3> right, left;

glm::vec3 last_location;

float last_theta;

int len = 100;

int head_size = 45;

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

auto location = glm::vec3(ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i) * 0.008), 0, 1, -280, 280), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i) * 0.008), 0, 1, -280, 280), 0);

auto next = glm::vec3(ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i + 1) * 0.008), 0, 1, -280, 280), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i + 1) * 0.008), 0, 1, -280, 280), 0);

auto direction = next - location;

auto theta = atan2(direction.y, direction.x);

right.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta + PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta + PI * 0.5), 0));

left.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta - PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta - PI * 0.5), 0));

last_location = location;

last_theta = theta;

}

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

mesh.addVertex(left[i]);

mesh.addVertex(right[i]);

}

for (int i = 0; i < mesh.getNumVertices() - 2; i += 2) {

mesh.addIndex(i + 0); mesh.addIndex(i + 1); mesh.addIndex(i + 3);

mesh.addIndex(i + 0); mesh.addIndex(i + 2); mesh.addIndex(i + 3);

}

auto tmp_head_size = ofMap(len - 2, 0, len, 0, head_size);

mesh.addVertex(last_location);

int index = mesh.getNumVertices();

for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

mesh.addVertex(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0));

}

for (int i = index; i < mesh.getNumVertices() - 1; i++) {

mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1);

}

mesh.draw();

}

ofDisableBlendMode();

this->fbo.end();

this->image.getTextureReference().setAlphaMask(this->fbo.getTexture());

this->image.update();

}

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

void ofApp::draw() {

ofSetColor(255);

this->image.draw(ofGetWindowSize() * 0.5);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210616

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2021年6月15日2021年6月15日

Fill in gaps. Draw by openFrameworks

[ Video ]

[ About ]
Fill in gaps.

[ Source ]

#pragma once
#include "ofMain.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 fbo;
	ofPixels pix;

	vector<tuple<ofColor, glm::vec2, float>> circles;
	int count;
};

#pragma once

#include "ofMain.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 fbo;

ofPixels pix;

vector<tuple<ofColor, glm::vec2, float>> circles;

int count;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openframeworks");

	ofBackground(239);

	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	this->count = 300;
}

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

	ofSeedRandom(39);

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

	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);

	for (int k = 0; k < 8; k++) {

		auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

		ofMesh mesh;
		vector<glm::vec3> right, left;

		glm::vec3 last_location;
		float last_theta;
		int len = 30;
		int head_size = 25;

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

			auto location = glm::vec3(ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i) * 0.005), 0, 1, -325, 325), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i) * 0.005), 0, 1, -350, 350), 0);
			auto next = glm::vec3(ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -325, 325), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -350, 350), 0);

			auto direction = next - location;
			auto theta = atan2(direction.y, direction.x);

			right.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta + PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta + PI * 0.5), 0));
			left.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta - PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta - PI * 0.5), 0));

			last_location = location;
			last_theta = theta;
		}

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

			mesh.addVertex(left[i]);
			mesh.addVertex(right[i]);
		}

		for (int i = 0; i < mesh.getNumVertices() - 2; i += 2) {

			mesh.addIndex(i + 0); mesh.addIndex(i + 1); mesh.addIndex(i + 3);
			mesh.addIndex(i + 0); mesh.addIndex(i + 2); mesh.addIndex(i + 3);
		}

		auto tmp_head_size = ofMap(len - 2, 0, len, 0, head_size);
		mesh.addVertex(last_location);

		int index = mesh.getNumVertices();
		for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

			mesh.addVertex(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0));
		}

		for (int i = index; i < mesh.getNumVertices() - 1; i++) {

			mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1);
		}

		mesh.draw();
	}

	this->fbo.end();
	this->fbo.readToPixels(this->pix);
}

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

	this->circles.clear();

	while (circles.size() < this->count) {

		int x = ofRandom(ofGetWidth());
		int y = ofRandom(ofGetHeight());

		ofColor pix_color = this->pix.getColor(x, y);
		if (pix_color != ofColor(0)) {

			continue;
		}

		ofColor color;
		color.setHsb(ofRandom(255), 255, 255);
		glm::vec2 point = glm::vec2(x, y);
		float radius = ofRandom(2, 8);

		bool flag = true;
		for (int i = 0; i < circles.size(); i++) {

			if (glm::distance(point, get<1>(circles[i])) < get<2>(circles[i]) + radius) {

				flag = false;
				break;
			}
		}

		if (flag) {

			circles.push_back(make_tuple(color, point, radius));
		}
	}

	for (int circles_index = 0; circles_index < circles.size(); circles_index++) {

		ofColor color = get<0>(circles[circles_index]);
		glm::vec2 point = get<1>(circles[circles_index]);
		float radius = get<2>(circles[circles_index]);

		ofSetColor(color);
		ofDrawCircle(point, radius);
	}

	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);

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

this->count = 300;

}

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

void ofApp::update() {

ofSeedRandom(39);

this->fbo.begin();

ofClear(0);

ofSetColor(0);

ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);

for (int k = 0; k < 8; k++) {

auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

ofMesh mesh;

vector<glm::vec3> right, left;

glm::vec3 last_location;

float last_theta;

int len = 30;

int head_size = 25;

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

auto location = glm::vec3(ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i) * 0.005), 0, 1, -325, 325), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i) * 0.005), 0, 1, -350, 350), 0);

auto next = glm::vec3(ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -325, 325), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -350, 350), 0);

auto direction = next - location;

auto theta = atan2(direction.y, direction.x);

right.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta + PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta + PI * 0.5), 0));

left.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta - PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta - PI * 0.5), 0));

last_location = location;

last_theta = theta;

}

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

mesh.addVertex(left[i]);

mesh.addVertex(right[i]);

}

for (int i = 0; i < mesh.getNumVertices() - 2; i += 2) {

mesh.addIndex(i + 0); mesh.addIndex(i + 1); mesh.addIndex(i + 3);

mesh.addIndex(i + 0); mesh.addIndex(i + 2); mesh.addIndex(i + 3);

}

auto tmp_head_size = ofMap(len - 2, 0, len, 0, head_size);

mesh.addVertex(last_location);

int index = mesh.getNumVertices();

for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

mesh.addVertex(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0));

}

for (int i = index; i < mesh.getNumVertices() - 1; i++) {

mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1);

}

mesh.draw();

}

this->fbo.end();

this->fbo.readToPixels(this->pix);

}

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

void ofApp::draw() {

this->circles.clear();

while (circles.size() < this->count) {

int x = ofRandom(ofGetWidth());

int y = ofRandom(ofGetHeight());

ofColor pix_color = this->pix.getColor(x, y);

if (pix_color != ofColor(0)) {

continue;

}

ofColor color;

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

glm::vec2 point = glm::vec2(x, y);

float radius = ofRandom(2, 8);

bool flag = true;

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

if (glm::distance(point, get<1>(circles[i])) < get<2>(circles[i]) + radius) {

flag = false;

break;

}

if (flag) {

circles.push_back(make_tuple(color, point, radius));

}

for (int circles_index = 0; circles_index < circles.size(); circles_index++) {

ofColor color = get<0>(circles[circles_index]);

glm::vec2 point = get<1>(circles[circles_index]);

float radius = get<2>(circles[circles_index]);

ofSetColor(color);

ofDrawCircle(point, radius);

}

ofPopMatrix();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210615

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