openFrameworks – ページ 393 – プログラミング de 落描き

2021年8月28日

Sprinkle font on. Draw by openFrameworks

[ Video ]

[ About ]
物理計算はofxBox2dで計算する。
速度を持っている間は文字が切り替わって、静止中は切り替わらない。

Physics calculations are done in ofxBox2d.
The character switches while it has speed, and does not switch while at rest.

半角カナを追加するには → https://junkiyoshi.com/openframeworks20210809/
Box2Dを動かすには → https://qiita.com/junkiyoshi/items/68e602568a0c94840bec

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofxBox2d.h"

class dCharacter {

public:

	dCharacter() {};
	void update(vector<string>& words);

	shared_ptr<ofxBox2dRect> rect;
	int index = 0;
};

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) {};

	int font_size;
	ofTrueTypeFont font;
	vector<string> words;

	ofxBox2d box2d;
	vector<dCharacter> drop_char_list;
};

#pragma once

#include "ofMain.h"

#include "ofxBox2d.h"

class dCharacter {

public:

dCharacter() {};

void update(vector<string>& words);

shared_ptr<ofxBox2dRect> rect;

int index = 0;

};

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) {};

int font_size;

ofTrueTypeFont font;

vector<string> words;

ofxBox2d box2d;

vector<dCharacter> drop_char_list;

};

#include "ofApp.h"

//--------------------------------------------------------------
void dCharacter::update(vector<string>& words) {

	if (ofGetFrameNum() % 5 && this->rect->getVelocity().length() > 1.5) {

		this->index = ofRandom(words.size());
	}
}

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

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

	ofBackground(239);
	ofSetColor(39);

	this->font_size = 20;
	ofTrueTypeFontSettings font_settings("fonts/msgothic.ttc", this->font_size);
	font_settings.antialiased = true;
	font_settings.addRanges(ofAlphabet::Japanese);
	this->font.load(font_settings);

	this->words = {

		//u8"!", u8"#", u8"$", u8"%", u8"&",
		//u8"'", u8"(", u8")", u8"*", u8"+",
		//u8",", u8"-", u8".", u8"/", u8"0",
		//u8"1", u8"2", u8"3", u8"4", u8"5",
		//u8"6", u8"7", u8"8", u8"9", u8"0",
		//u8":", u8";", u8"<", u8"=", u8">",
		//u8"?", u8"@",

		//u8"A", u8"B", u8"C", u8"D", u8"E",
		//u8"F", u8"G", u8"H", u8"I", u8"J",
		//u8"K", u8"L", u8"M", u8"N", u8"O",
		//u8"P", u8"Q", u8"R", u8"S", u8"T",
		//u8"U", u8"V", u8"W", u8"X", u8"Y", u8"Z",

		//u8"a", u8"b", u8"c", u8"d", u8"e",
		//u8"f", u8"g", u8"h", u8"i", u8"j",
		//u8"k", u8"l", u8"m", u8"n", u8"o",
		//u8"p", u8"q", u8"r", u8"s", u8"t",
		//u8"u", u8"v", u8"w", u8"x", u8"y", u8"z",

		u8"ｱ", u8"ｲ", u8"ｳ", u8"ｴ", u8"ｵ",
		u8"ｶ", u8"ｷ", u8"ｸ", u8"ｹ", u8"ｺ",
		u8"ｻ", u8"ｼ", u8"ｽ", u8"ｾ", u8"ｿ",
		u8"ﾀ", u8"ﾁ", u8"ﾂ", u8"ﾃ", u8"ﾄ",
		u8"ﾅ", u8"ﾆ", u8"ﾇ", u8"ﾈ", u8"ﾉ",
		u8"ﾊ", u8"ﾋ", u8"ﾌ", u8"ﾍ", u8"ﾎ",
		u8"ﾏ", u8"ﾐ", u8"ﾑ", u8"ﾒ", u8"ﾓ",
		u8"ﾔ", u8"ﾕ", u8"ﾖ",
		u8"ﾗ", u8"ﾘ", u8"ﾙ", u8"ﾚ", u8"ﾛ",
		u8"ﾜ", u8"ｦ", u8"ﾝ",
	};

	this->box2d.init();
	this->box2d.setGravity(0, 15);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();
}

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

	if (ofRandom(100) < 35) {

		auto rect = make_shared<ofxBox2dRect>();
		rect->setPhysics(1.0, 0.3, 0.3);
		rect->setup(this->box2d.getWorld(), ofRandom(ofGetWidth() * 0.5 - 25, ofGetWidth() * 0.5 + 25), 25, this->font_size, this->font_size);

		auto drop_char = dCharacter();
		drop_char.rect = rect;
		drop_char.index = ofRandom(this->words.size());

		this->drop_char_list.push_back(drop_char);
	}

	for (auto& drop_char : this->drop_char_list) {

		drop_char.update(this->words);
	}

	this->box2d.update();
}

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

	for (auto& drop_char : this->drop_char_list) {

		ofPushMatrix();
		ofTranslate(drop_char.rect->getPosition().x, drop_char.rect->getPosition().y);
		ofRotate(drop_char.rect->getRotation());

		this->font.drawString(this->words[drop_char.index], -5, 10);

		ofPopMatrix();
	}
}

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

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

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#include "ofApp.h"

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

void dCharacter::update(vector<string>& words) {

if (ofGetFrameNum() % 5 && this->rect->getVelocity().length() > 1.5) {

this->index = ofRandom(words.size());

}

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetColor(39);

this->font_size = 20;

ofTrueTypeFontSettings font_settings("fonts/msgothic.ttc", this->font_size);

font_settings.antialiased = true;

font_settings.addRanges(ofAlphabet::Japanese);

this->font.load(font_settings);

this->words = {

//u8"!", u8"#", u8"$", u8"%", u8"&",

//u8"'", u8"(", u8")", u8"*", u8"+",

//u8",", u8"-", u8".", u8"/", u8"0",

//u8"1", u8"2", u8"3", u8"4", u8"5",

//u8"6", u8"7", u8"8", u8"9", u8"0",

//u8":", u8";", u8"<", u8"=", u8">",

//u8"?", u8"@",

//u8"A", u8"B", u8"C", u8"D", u8"E",

//u8"F", u8"G", u8"H", u8"I", u8"J",

//u8"K", u8"L", u8"M", u8"N", u8"O",

//u8"P", u8"Q", u8"R", u8"S", u8"T",

//u8"U", u8"V", u8"W", u8"X", u8"Y", u8"Z",

//u8"a", u8"b", u8"c", u8"d", u8"e",

//u8"f", u8"g", u8"h", u8"i", u8"j",

//u8"k", u8"l", u8"m", u8"n", u8"o",

//u8"p", u8"q", u8"r", u8"s", u8"t",

//u8"u", u8"v", u8"w", u8"x", u8"y", u8"z",

u8"ｱ", u8"ｲ", u8"ｳ", u8"ｴ", u8"ｵ",

u8"ｶ", u8"ｷ", u8"ｸ", u8"ｹ", u8"ｺ",

u8"ｻ", u8"ｼ", u8"ｽ", u8"ｾ", u8"ｿ",

u8"ﾀ", u8"ﾁ", u8"ﾂ", u8"ﾃ", u8"ﾄ",

u8"ﾅ", u8"ﾆ", u8"ﾇ", u8"ﾈ", u8"ﾉ",

u8"ﾊ", u8"ﾋ", u8"ﾌ", u8"ﾍ", u8"ﾎ",

u8"ﾏ", u8"ﾐ", u8"ﾑ", u8"ﾒ", u8"ﾓ",

u8"ﾔ", u8"ﾕ", u8"ﾖ",

u8"ﾗ", u8"ﾘ", u8"ﾙ", u8"ﾚ", u8"ﾛ",

u8"ﾜ", u8"ｦ", u8"ﾝ",

};

this->box2d.init();

this->box2d.setGravity(0, 15);

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

}

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

void ofApp::update() {

if (ofRandom(100) < 35) {

auto rect = make_shared<ofxBox2dRect>();

rect->setPhysics(1.0, 0.3, 0.3);

rect->setup(this->box2d.getWorld(), ofRandom(ofGetWidth() * 0.5 - 25, ofGetWidth() * 0.5 + 25), 25, this->font_size, this->font_size);

auto drop_char = dCharacter();

drop_char.rect = rect;

drop_char.index = ofRandom(this->words.size());

this->drop_char_list.push_back(drop_char);

}

for (auto& drop_char : this->drop_char_list) {

drop_char.update(this->words);

}

this->box2d.update();

}

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

void ofApp::draw() {

for (auto& drop_char : this->drop_char_list) {

ofPushMatrix();

ofTranslate(drop_char.rect->getPosition().x, drop_char.rect->getPosition().y);

ofRotate(drop_char.rect->getRotation());

this->font.drawString(this->words[drop_char.index], -5, 10);

ofPopMatrix();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210828

[ Kinako ]

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2021年8月27日2021年8月27日

Open an OpenSea account. Draw by openFrameworks

[ Video ]

[ About ]
OpenSeaアカウントを開設しました。
NFTの販売も開始しています。

We have opened an OpenSea account and have started selling NFTs.

https://opensea.io/junkiyoshi

[ Source ]

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

	ofEasyCam cam;

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

	ofImage image;
	cv::Mat frame;
	vector<cv::Mat> frame_list;
	int number_of_frames;

	vector<ofMesh> mesh_list;

	ofTrueTypeFont font;
};

#pragma once

#include "ofMain.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) {};

ofEasyCam cam;

cv::VideoCapture cap;

cv::Size cap_size;

ofImage image;

cv::Mat frame;

vector<cv::Mat> frame_list;

int number_of_frames;

vector<ofMesh> mesh_list;

ofTrueTypeFont font;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();

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

	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);

	this->cap.open("D:\\MP4\\opensea.mp4");
	this->number_of_frames = this->cap.get(cv::CAP_PROP_FRAME_COUNT);
	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->font.loadFont("fonts/Kazesawa-Bold.ttf", 50, true, true, true);
}

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

	int frame_index = ofGetFrameNum() % this->number_of_frames;
	this->frame_list[frame_index].copyTo(this->frame);
	this->image.update();

	this->mesh_list.clear();

	float radius = 200;
	int deg_span = 3;
	int x_span = 4;
	for (int x = 0; x < this->cap_size.width; x += x_span) {

		ofMesh mesh, frame;
		frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
		int deg_start = ofMap(ofNoise(x * 0.00025, ofGetFrameNum() * 0.005), 0, 1, -360, 360);
		for (int deg = deg_start; deg < deg_start + 180; deg += deg_span) {

			int index = mesh.getNumVertices();

			vector<glm::vec3> vertices;
			vertices.push_back(glm::vec3(x - this->cap_size.width * 0.5, radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));
			vertices.push_back(glm::vec3(x - this->cap_size.width * 0.5, radius * cos((deg + deg_span) * DEG_TO_RAD), radius * sin((deg + deg_span) * DEG_TO_RAD)));
			vertices.push_back(glm::vec3(x + x_span - this->cap_size.width * 0.5, radius* cos((deg + deg_span) * DEG_TO_RAD), radius * sin((deg + deg_span) * DEG_TO_RAD)));
			vertices.push_back(glm::vec3(x + x_span - this->cap_size.width * 0.5, radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));

			mesh.addVertices(vertices);
			frame.addVertices(vertices);

			int y = ofMap(deg - deg_start, 0, 180, 0, this->cap_size.height);
			int next_y = ofMap(deg + deg_span - deg_start, 0, 180, 0, this->cap_size.height);

			mesh.addTexCoord(glm::vec3(x, y, 0));
			mesh.addTexCoord(glm::vec3(x, next_y, 0));
			mesh.addTexCoord(glm::vec3(x + x_span, next_y, 0));
			mesh.addTexCoord(glm::vec3(x + x_span, y, 0));

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

		this->mesh_list.push_back(mesh);
	}
}

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

	this->cam.begin();

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

		float z = (this->mesh_list[i].getVertex(0).z + this->mesh_list[i].getVertex(2).z) / 2;

		this->image.bind();
		ofSetColor(255);
		this->mesh_list[i].draw();
		this->image.unbind();
	}

	ofRotateX(180);

	auto word = "https://opensea.io/junkiyoshi";
	auto base_location = glm::vec2(this->font.stringWidth(word) * -0.5, this->font.stringHeight(word) * 0.5);
	auto param = ofGetFrameNum();

	vector<ofPath> word_path = this->font.getStringAsPoints(word, true, false);
	for (int word_index = 0; word_index < word_path.size(); word_index++) {

		vector<ofPolyline> outline = word_path[word_index].getOutline();

		ofFill();
		ofSetColor(39);
		ofBeginShape();
		for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

			if (outline_index != 0) { ofNextContour(true); }

			vector<glm::vec3> vertices = outline[outline_index].getVertices();
			for (auto& vertex : vertices) { vertex += glm::vec3(base_location, 0); }

			ofVertices(vertices);
		}
		ofEndShape();
	}

	this->cam.end();
}

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

ofEnableDepthTest();

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

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);

this->cap.open("D:\\MP4\\opensea.mp4");

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

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->font.loadFont("fonts/Kazesawa-Bold.ttf", 50, true, true, true);

}

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

void ofApp::update() {

int frame_index = ofGetFrameNum() % this->number_of_frames;

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

this->image.update();

this->mesh_list.clear();

float radius = 200;

int deg_span = 3;

int x_span = 4;

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

ofMesh mesh, frame;

frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

int deg_start = ofMap(ofNoise(x * 0.00025, ofGetFrameNum() * 0.005), 0, 1, -360, 360);

for (int deg = deg_start; deg < deg_start + 180; deg += deg_span) {

int index = mesh.getNumVertices();

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(x - this->cap_size.width * 0.5, radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));

vertices.push_back(glm::vec3(x - this->cap_size.width * 0.5, radius * cos((deg + deg_span) * DEG_TO_RAD), radius * sin((deg + deg_span) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(x + x_span - this->cap_size.width * 0.5, radius* cos((deg + deg_span) * DEG_TO_RAD), radius * sin((deg + deg_span) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(x + x_span - this->cap_size.width * 0.5, radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));

mesh.addVertices(vertices);

frame.addVertices(vertices);

int y = ofMap(deg - deg_start, 0, 180, 0, this->cap_size.height);

int next_y = ofMap(deg + deg_span - deg_start, 0, 180, 0, this->cap_size.height);

mesh.addTexCoord(glm::vec3(x, y, 0));

mesh.addTexCoord(glm::vec3(x, next_y, 0));

mesh.addTexCoord(glm::vec3(x + x_span, next_y, 0));

mesh.addTexCoord(glm::vec3(x + x_span, y, 0));

mesh.addIndex(index + 0); mesh.addIndex(index + 1); mesh.addIndex(index + 2);

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

}

this->mesh_list.push_back(mesh);

}

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

void ofApp::draw() {

this->cam.begin();

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

float z = (this->mesh_list[i].getVertex(0).z + this->mesh_list[i].getVertex(2).z) / 2;

this->image.bind();

ofSetColor(255);

this->mesh_list[i].draw();

this->image.unbind();

}

ofRotateX(180);

auto word = "https://opensea.io/junkiyoshi";

auto base_location = glm::vec2(this->font.stringWidth(word) * -0.5, this->font.stringHeight(word) * 0.5);

auto param = ofGetFrameNum();

vector<ofPath> word_path = this->font.getStringAsPoints(word, true, false);

for (int word_index = 0; word_index < word_path.size(); word_index++) {

vector<ofPolyline> outline = word_path[word_index].getOutline();

ofFill();

ofSetColor(39);

ofBeginShape();

for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

if (outline_index != 0) { ofNextContour(true); }

vector<glm::vec3> vertices = outline[outline_index].getVertices();

for (auto& vertex : vertices) { vertex += glm::vec3(base_location, 0); }

ofVertices(vertices);

}

ofEndShape();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210827

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2021年8月26日

Gradient Ribbons. Draw by openFrameworsk

[ Video ]

[ About ]
色指定のHSBのHueをFrameCountで増やす。

Increase HSB Hue of color specification by FrameCount.

[ 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) {};

	ofEasyCam cam;

	vector<ofMesh> mesh_list;
	vector<ofMesh> frame_list;
	vector<glm::vec3> direction_list;
	vector<glm::vec3> noise_seed_list;
	vector<float> hue_list;
	vector<float> noise_step_list;
};

#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) {};

ofEasyCam cam;

vector<ofMesh> mesh_list;

vector<ofMesh> frame_list;

vector<glm::vec3> direction_list;

vector<glm::vec3> noise_seed_list;

vector<float> hue_list;

vector<float> noise_step_list;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();

	for (int i = 0; i < 150; i++) {

		ofMesh mesh, frame;
		frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
		glm::vec3 base = glm::vec3(ofRandom(-100, 100), ofRandom(-100, 100), ofRandom(-100, 100));
		switch ((int)ofRandom(3)) {
		case 0:
			mesh.addVertex(base + glm::vec3(5, 0, 0));
			mesh.addVertex(base + glm::vec3(-5, 0, 0));
			frame.addVertex(base + glm::vec3(5, 0, 0));
			frame.addVertex(base + glm::vec3(-5, 0, 0));
			break;
		case 1:
			mesh.addVertex(base + glm::vec3(0, 5, 0));
			mesh.addVertex(base + glm::vec3(0, -5, 0));
			frame.addVertex(base + glm::vec3(0, 5, 0));
			frame.addVertex(base + glm::vec3(0, -5, 0));
			break;
		case 2:
			mesh.addVertex(base + glm::vec3(0, 0, 5));
			mesh.addVertex(base + glm::vec3(0, 0, -5));
			frame.addVertex(base + glm::vec3(0, 0, 5));
			frame.addVertex(base + glm::vec3(0, 0, -5));
			break;
		}

		int hue = ofRandom(255);
		this->hue_list.push_back(hue);
		ofColor mesh_color;
		mesh_color.setHsb(hue, 255, 255);

		mesh.addColor(mesh_color);
		mesh.addColor(mesh_color);

		frame.addColor(ofColor(239)); 
		frame.addColor(ofColor(239));

		frame.addIndex(0);
		frame.addIndex(1);

		this->mesh_list.push_back(mesh);
		this->frame_list.push_back(frame);

		auto direction = glm::vec3(ofRandom(-1, 1), ofRandom(-1, 1), ofRandom(-1, 1));
		direction = glm::normalize(direction) * 5;
		this->direction_list.push_back(direction);

		auto noise_seed = glm::vec3(glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000)));
		this->noise_seed_list.push_back(noise_seed);

		this->noise_step_list.push_back(0.f);
	}
}

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

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

		while (true) {

			this->noise_step_list[i] += 0.01;

			auto angle_x = ofMap(ofNoise(this->noise_seed_list[i].x, this->noise_step_list[i]), 0, 1, -PI, PI);
			auto angle_y = ofMap(ofNoise(this->noise_seed_list[i].y, this->noise_step_list[i]), 0, 1, -PI, PI);
			auto angle_z = ofMap(ofNoise(this->noise_seed_list[i].z, this->noise_step_list[i]), 0, 1, -PI, PI);

			auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0));
			auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0));
			auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

			glm::vec3 rotate_direction = glm::vec4(this->direction_list[i], 0) * rotation_z * rotation_y * rotation_x;

			auto right = this->mesh_list[i].getVertex(this->mesh_list[i].getNumVertices() - 2);
			auto left = this->mesh_list[i].getVertex(this->mesh_list[i].getNumVertices() - 1);
			auto center = (right + left) / 2;

			auto feature = center + rotate_direction;
			if (glm::length(feature) < 300) {

				this->mesh_list[i].addVertex(right + rotate_direction);
				this->mesh_list[i].addVertex(left + rotate_direction);

				this->frame_list[i].addVertex(right + rotate_direction);
				this->frame_list[i].addVertex(left + rotate_direction);

				this->hue_list[i] = (int)(this->hue_list[i] + 6) % 255;

				ofColor mesh_color;
				mesh_color.setHsb(this->hue_list[i], 255, 255);

				this->mesh_list[i].addColor(mesh_color);
				this->mesh_list[i].addColor(mesh_color);

				this->frame_list[i].addColor(ofColor(239));
				this->frame_list[i].addColor(ofColor(239));

				break;
			}
		}

		if (this->mesh_list[i].getNumVertices() > 150) {

			this->mesh_list[i].removeVertex(0);
			this->mesh_list[i].removeVertex(1);

			this->mesh_list[i].removeColor(0);
			this->mesh_list[i].removeColor(1);
		}
		else {

			int index = this->mesh_list[i].getNumVertices() - 1;
			this->mesh_list[i].addIndex(index); this->mesh_list[i].addIndex(index - 2); this->mesh_list[i].addIndex(index - 3);
			this->mesh_list[i].addIndex(index); this->mesh_list[i].addIndex(index - 1); this->mesh_list[i].addIndex(index - 3);
		}

		if (this->frame_list[i].getNumVertices() > 100) {

			this->frame_list[i].removeVertex(0);
			this->frame_list[i].removeVertex(1);

			this->frame_list[i].removeColor(0);
			this->frame_list[i].removeColor(1);
		}
		else {

			int index = this->frame_list[i].getNumVertices() - 1;
			this->frame_list[i].addIndex(index); this->frame_list[i].addIndex(index - 2);
			this->frame_list[i].addIndex(index - 1); this->frame_list[i].addIndex(index - 3);

			if (index == 99) {

				this->frame_list[i].addIndex(98);
				this->frame_list[i].addIndex(99);
			}
		}
	}
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 0.25);

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

		this->mesh_list[i].draw();
		this->frame_list[i].drawWireframe();
	}

	this->cam.end();
}

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

ofEnableDepthTest();

for (int i = 0; i < 150; i++) {

ofMesh mesh, frame;

frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

glm::vec3 base = glm::vec3(ofRandom(-100, 100), ofRandom(-100, 100), ofRandom(-100, 100));

switch ((int)ofRandom(3)) {

case 0:

mesh.addVertex(base + glm::vec3(5, 0, 0));

mesh.addVertex(base + glm::vec3(-5, 0, 0));

frame.addVertex(base + glm::vec3(5, 0, 0));

frame.addVertex(base + glm::vec3(-5, 0, 0));

break;

case 1:

mesh.addVertex(base + glm::vec3(0, 5, 0));

mesh.addVertex(base + glm::vec3(0, -5, 0));

frame.addVertex(base + glm::vec3(0, 5, 0));

frame.addVertex(base + glm::vec3(0, -5, 0));

break;

case 2:

mesh.addVertex(base + glm::vec3(0, 0, 5));

mesh.addVertex(base + glm::vec3(0, 0, -5));

frame.addVertex(base + glm::vec3(0, 0, 5));

frame.addVertex(base + glm::vec3(0, 0, -5));

break;

}

int hue = ofRandom(255);

this->hue_list.push_back(hue);

ofColor mesh_color;

mesh_color.setHsb(hue, 255, 255);

mesh.addColor(mesh_color);

frame.addColor(ofColor(239));

frame.addIndex(0);

frame.addIndex(1);

this->mesh_list.push_back(mesh);

this->frame_list.push_back(frame);

auto direction = glm::vec3(ofRandom(-1, 1), ofRandom(-1, 1), ofRandom(-1, 1));

direction = glm::normalize(direction) * 5;

this->direction_list.push_back(direction);

auto noise_seed = glm::vec3(glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000)));

this->noise_seed_list.push_back(noise_seed);

this->noise_step_list.push_back(0.f);

}

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

void ofApp::update() {

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

while (true) {

this->noise_step_list[i] += 0.01;

auto angle_x = ofMap(ofNoise(this->noise_seed_list[i].x, this->noise_step_list[i]), 0, 1, -PI, PI);

auto angle_y = ofMap(ofNoise(this->noise_seed_list[i].y, this->noise_step_list[i]), 0, 1, -PI, PI);

auto angle_z = ofMap(ofNoise(this->noise_seed_list[i].z, this->noise_step_list[i]), 0, 1, -PI, PI);

auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0));

auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0));

auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

glm::vec3 rotate_direction = glm::vec4(this->direction_list[i], 0) * rotation_z * rotation_y * rotation_x;

auto right = this->mesh_list[i].getVertex(this->mesh_list[i].getNumVertices() - 2);

auto left = this->mesh_list[i].getVertex(this->mesh_list[i].getNumVertices() - 1);

auto center = (right + left) / 2;

auto feature = center + rotate_direction;

if (glm::length(feature) < 300) {

this->mesh_list[i].addVertex(right + rotate_direction);

this->mesh_list[i].addVertex(left + rotate_direction);

this->frame_list[i].addVertex(right + rotate_direction);

this->frame_list[i].addVertex(left + rotate_direction);

this->hue_list[i] = (int)(this->hue_list[i] + 6) % 255;

ofColor mesh_color;

mesh_color.setHsb(this->hue_list[i], 255, 255);

this->mesh_list[i].addColor(mesh_color);

this->frame_list[i].addColor(ofColor(239));

break;

}

if (this->mesh_list[i].getNumVertices() > 150) {

this->mesh_list[i].removeVertex(0);

this->mesh_list[i].removeVertex(1);

this->mesh_list[i].removeColor(0);

this->mesh_list[i].removeColor(1);

}

else {

int index = this->mesh_list[i].getNumVertices() - 1;

this->mesh_list[i].addIndex(index); this->mesh_list[i].addIndex(index - 2); this->mesh_list[i].addIndex(index - 3);

this->mesh_list[i].addIndex(index); this->mesh_list[i].addIndex(index - 1); this->mesh_list[i].addIndex(index - 3);

}

if (this->frame_list[i].getNumVertices() > 100) {

this->frame_list[i].removeVertex(0);

this->frame_list[i].removeVertex(1);

this->frame_list[i].removeColor(0);

this->frame_list[i].removeColor(1);

}

else {

int index = this->frame_list[i].getNumVertices() - 1;

this->frame_list[i].addIndex(index); this->frame_list[i].addIndex(index - 2);

this->frame_list[i].addIndex(index - 1); this->frame_list[i].addIndex(index - 3);

if (index == 99) {

this->frame_list[i].addIndex(98);

this->frame_list[i].addIndex(99);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 0.25);

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

this->mesh_list[i].draw();

this->frame_list[i].drawWireframe();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/openframeworks20210826

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