RandomWalk – ページ 7 – プログラミング de 落描き

2023年7月17日

Squares transit. Draw by openFrameworks

[ Video ]

[ About ]
マス目運動。

[ 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 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) {};

	float len;
	vector<glm::vec2> start_location_list;
	vector<vector<glm::vec2>> location_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 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) {};

float len;

vector<glm::vec2> start_location_list;

vector<vector<glm::vec2>> location_list;

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openframeworks");

	ofBackground(239);
	ofSetLineWidth(1.5);

	this->len = 30;
	for (float x = 0; x < ofGetWidth(); x += this->len) {

		for (float y = 0; y < ofGetHeight(); y += this->len) {

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

	for (int i = 0; i < 16; i++) {

		int r = ofRandom(this->start_location_list.size());

		auto log_list = vector<glm::vec2>();
		log_list.push_back(this->start_location_list[r]);
		this->location_list.push_back(log_list);
	}
}

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

	if (ofGetFrameNum() % 2 == 0) {

		for (auto& log_list : this->location_list) {

			int r = ofRandom(4);
			int deg_start = r * 90;
			for (int deg = deg_start; deg < deg_start + 360; deg += 90) {

				auto tmp_location = log_list.back() + glm::vec2(this->len * cos(deg * DEG_TO_RAD), this->len * sin(deg * DEG_TO_RAD));
				if (tmp_location.x < 0 || tmp_location.x > ofGetWidth() - this->len || tmp_location.y < 0 || tmp_location.y > ofGetHeight() - this->len) {

					continue;
				}

				bool flag = false;
				for (int i = 0; i < log_list.size(); i++) {

					if (tmp_location == log_list[i] && deg_start != deg && deg_start % 360 == deg % 360){

						flag = true;
						break;
					}
				}
				if (flag) { continue; }

				log_list.push_back(tmp_location);
				break;
			}

			while (log_list.size() > 5) {

				log_list.erase(log_list.begin());
			}
		}
	}
}

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

	int color_index = 0;
	for (auto& log_list : this->location_list) {

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

			ofFill();
			ofSetColor(ofColor(0, ofMap(i, 0, log_list.size(), 32, 200)));
			ofDrawRectangle(log_list[i], this->len, this->len);

			ofNoFill();
			ofSetColor(0);
			ofDrawRectangle(log_list[i], this->len, this->len);
		}
	}

	ofSetColor(0, 32);
	ofNoFill();
	for (float x = 0; x < ofGetWidth(); x += this->len) {

		for (float y = 0; y < ofGetHeight(); y += this->len) {

			ofDrawRectangle(glm::vec3(x, y, 0), this->len, this->len);
		}
	}
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetLineWidth(1.5);

this->len = 30;

for (float x = 0; x < ofGetWidth(); x += this->len) {

for (float y = 0; y < ofGetHeight(); y += this->len) {

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

}

for (int i = 0; i < 16; i++) {

int r = ofRandom(this->start_location_list.size());

auto log_list = vector<glm::vec2>();

log_list.push_back(this->start_location_list[r]);

this->location_list.push_back(log_list);

}

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

void ofApp::update() {

if (ofGetFrameNum() % 2 == 0) {

for (auto& log_list : this->location_list) {

int r = ofRandom(4);

int deg_start = r * 90;

for (int deg = deg_start; deg < deg_start + 360; deg += 90) {

auto tmp_location = log_list.back() + glm::vec2(this->len * cos(deg * DEG_TO_RAD), this->len * sin(deg * DEG_TO_RAD));

if (tmp_location.x < 0 || tmp_location.x > ofGetWidth() - this->len || tmp_location.y < 0 || tmp_location.y > ofGetHeight() - this->len) {

continue;

}

bool flag = false;

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

if (tmp_location == log_list[i] && deg_start != deg && deg_start % 360 == deg % 360){

flag = true;

break;

}

if (flag) { continue; }

log_list.push_back(tmp_location);

break;

}

while (log_list.size() > 5) {

log_list.erase(log_list.begin());

}

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

void ofApp::draw() {

int color_index = 0;

for (auto& log_list : this->location_list) {

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

ofFill();

ofSetColor(ofColor(0, ofMap(i, 0, log_list.size(), 32, 200)));

ofDrawRectangle(log_list[i], this->len, this->len);

ofNoFill();

ofSetColor(0);

ofDrawRectangle(log_list[i], this->len, this->len);

}

ofSetColor(0, 32);

ofNoFill();

for (float x = 0; x < ofGetWidth(); x += this->len) {

for (float y = 0; y < ofGetHeight(); y += this->len) {

ofDrawRectangle(glm::vec3(x, y, 0), this->len, this->len);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230717

2023年7月16日

Random walks in cube. Draw by openFrameworks

[ Video ]

[ About ]
キューブの中のランダムウォーク

[ Source ]

#pragma once
#include "ofMain.h"

class Actor {
public:
	Actor(vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list);
	void update(const int& frame_span, vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list);
	void draw();
	glm::vec3 getLocation();
	deque<glm::vec3> getLog();
	void setColor(ofColor color);
	ofColor getColor();

private:

	int select_index;
	int next_index;

	glm::vec3 location;
	deque<glm::vec3> log;
	ofColor color;

	ofMesh mesh;
};

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) {};

	glm::vec3 make_point(float R, float r, float u, float v);

	vector<glm::vec3> location_list;
	vector<vector<int>> next_index_list;
	vector<int> destination_list;

	vector<unique_ptr<Actor>> actor_list;

	ofEasyCam cam;
};

#pragma once

#include "ofMain.h"

class Actor {

public:

Actor(vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list);

void update(const int& frame_span, vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list);

void draw();

glm::vec3 getLocation();

deque<glm::vec3> getLog();

void setColor(ofColor color);

ofColor getColor();

private:

int select_index;

int next_index;

glm::vec3 location;

deque<glm::vec3> log;

ofColor color;

ofMesh mesh;

};

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) {};

glm::vec3 make_point(float R, float r, float u, float v);

vector<glm::vec3> location_list;

vector<vector<int>> next_index_list;

vector<int> destination_list;

vector<unique_ptr<Actor>> actor_list;

ofEasyCam cam;

};

#include "ofApp.h"	

//--------------------------------------------------------------
Actor::Actor(vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list) {

	this->select_index = ofRandom(location_list.size());
	while (true) {

		auto itr = find(destination_list.begin(), destination_list.end(), this->select_index);
		if (itr == destination_list.end()) {

			destination_list.push_back(this->select_index);
			break;
		}

		this->select_index = (this->select_index + 1) % location_list.size();
	}

	this->next_index = this->select_index;

	this->mesh.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
}

//--------------------------------------------------------------
void Actor::update(const int& frame_span, vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list) {

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

		auto tmp_index = this->select_index;
		this->select_index = this->next_index;
		int retry = next_index_list[this->select_index].size();
		this->next_index = next_index_list[this->select_index][(int)ofRandom(next_index_list[this->select_index].size())];
		while (--retry > 0) {

			auto destination_itr = find(destination_list.begin(), destination_list.end(), this->next_index);
			if (destination_itr == destination_list.end()) {

				if (tmp_index != this->next_index) {

					destination_list.push_back(this->next_index);
					break;
				}
			}

			this->next_index = next_index_list[this->select_index][(this->next_index + 1) % next_index_list[this->select_index].size()];
		}
		if (retry <= 0) {

			destination_list.push_back(this->select_index);
			this->next_index = this->select_index;
		}
	}

	auto param = ofGetFrameNum() % frame_span;
	auto distance = location_list[this->next_index] - location_list[this->select_index];
	this->location = location_list[this->select_index] + distance / frame_span * param;

	this->log.push_front(this->location);
	while (this->log.size() > frame_span * 6) { this->log.pop_back(); }

	this->mesh.clear();
	for (int i = 0; i < this->log.size() - 1; i++) {

		this->mesh.addVertex(this->log[i]);
		this->mesh.addColor(ofColor(this->color, ofMap(i, 0, this->log.size(), 255, 0)));
		if (i > 0) {

			this->mesh.addIndex(i);
			this->mesh.addIndex(i - 1);
		}
	}
}

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

	this->mesh.draw();
}

//--------------------------------------------------------------
glm::vec3 Actor::getLocation() {

	return this->location;
}

//--------------------------------------------------------------
deque<glm::vec3> Actor::getLog() {

	return this->log;
}

//--------------------------------------------------------------
void Actor::setColor(ofColor color) {

	this->color = color;
}

//--------------------------------------------------------------
ofColor Actor::getColor() {

	return this->color;
}

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openFrameworks");

	ofBackground(0);
	ofSetLineWidth(1);
	ofEnableDepthTest();

	int span = 10;
	for (int x = -150; x <= 150; x += span) {

		for (int y = -150; y <= 150; y += span) {

			for (int z = -150; z <= 150; z += span) {

				bool x_flag = x < -100 || x > 100;
				bool y_flag = y < -100 || y > 100;
				bool z_flag = z < -100 || z > 100;

				if (((x_flag || y_flag) && z_flag) || ((y_flag || z_flag) && x_flag)) {

					this->location_list.push_back(glm::vec3(x, y, z));
				}
			}
		}
	}

	for (auto& location : this->location_list) {

		vector<int> next_index = vector<int>();
		int index = -1;
		for (auto& other : this->location_list) {

			index++;
			if (location == other) { continue; }

			float distance = glm::distance(location, other);
			if (distance <= 10) {

				next_index.push_back(index);
			}
		}

		this->next_index_list.push_back(next_index);
	}

	ofColor color;
	for (int i = 0; i < 650; i++) {

		this->actor_list.push_back(make_unique<Actor>(this->location_list, this->next_index_list, this->destination_list));

		color.setHsb(ofMap(i, 0, 500, 0, 255), 255, 255);
		this->actor_list.back()->setColor(color);
	}
}

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

	int frame_span = 5;
	int prev_index_size = 0;

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

		prev_index_size = this->destination_list.size();
	}

	for (auto& actor : this->actor_list) {

		actor->update(frame_span, this->location_list, this->next_index_list, this->destination_list);
	}

	if (prev_index_size != 0) {

		this->destination_list.erase(this->destination_list.begin(), this->destination_list.begin() + prev_index_size);
	}
}

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

	this->cam.begin();
	ofTranslate(-5, -5, 0);
	this->cam.setPosition(glm::vec3(0, 0, 500));
	ofRotateY(ofGetFrameNum());

	for (auto& actor : this->actor_list) {

		actor->draw();
	}

	this->cam.end();
}

//--------------------------------------------------------------
glm::vec3 ofApp::make_point(float R, float r, float u, float v) {

	// 数学デッサン教室 描いて楽しむ数学たち　P.31

	u *= DEG_TO_RAD;
	v *= DEG_TO_RAD;

	auto x = (R + r * cos(u)) * cos(v);
	auto y = (R + r * cos(u)) * sin(v);
	auto z = r * sin(u);

	return glm::vec3(x, y, z);
}


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

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

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#include "ofApp.h"

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

Actor::Actor(vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list) {

this->select_index = ofRandom(location_list.size());

while (true) {

auto itr = find(destination_list.begin(), destination_list.end(), this->select_index);

if (itr == destination_list.end()) {

destination_list.push_back(this->select_index);

break;

}

this->select_index = (this->select_index + 1) % location_list.size();

}

this->next_index = this->select_index;

this->mesh.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

}

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

void Actor::update(const int& frame_span, vector<glm::vec3>& location_list, vector<vector<int>>& next_index_list, vector<int>& destination_list) {

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

auto tmp_index = this->select_index;

this->select_index = this->next_index;

int retry = next_index_list[this->select_index].size();

this->next_index = next_index_list[this->select_index][(int)ofRandom(next_index_list[this->select_index].size())];

while (--retry > 0) {

auto destination_itr = find(destination_list.begin(), destination_list.end(), this->next_index);

if (destination_itr == destination_list.end()) {

if (tmp_index != this->next_index) {

destination_list.push_back(this->next_index);

break;

}

this->next_index = next_index_list[this->select_index][(this->next_index + 1) % next_index_list[this->select_index].size()];

}

if (retry <= 0) {

destination_list.push_back(this->select_index);

this->next_index = this->select_index;

}

auto param = ofGetFrameNum() % frame_span;

auto distance = location_list[this->next_index] - location_list[this->select_index];

this->location = location_list[this->select_index] + distance / frame_span * param;

this->log.push_front(this->location);

while (this->log.size() > frame_span * 6) { this->log.pop_back(); }

this->mesh.clear();

for (int i = 0; i < this->log.size() - 1; i++) {

this->mesh.addVertex(this->log[i]);

this->mesh.addColor(ofColor(this->color, ofMap(i, 0, this->log.size(), 255, 0)));

if (i > 0) {

this->mesh.addIndex(i);

this->mesh.addIndex(i - 1);

}

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

void Actor::draw() {

this->mesh.draw();

}

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

glm::vec3 Actor::getLocation() {

return this->location;

}

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

deque<glm::vec3> Actor::getLog() {

return this->log;

}

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

void Actor::setColor(ofColor color) {

this->color = color;

}

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

ofColor Actor::getColor() {

return this->color;

}

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofSetLineWidth(1);

ofEnableDepthTest();

int span = 10;

for (int x = -150; x <= 150; x += span) {

for (int y = -150; y <= 150; y += span) {

for (int z = -150; z <= 150; z += span) {

bool x_flag = x < -100 || x > 100;

bool y_flag = y < -100 || y > 100;

bool z_flag = z < -100 || z > 100;

if (((x_flag || y_flag) && z_flag) || ((y_flag || z_flag) && x_flag)) {

this->location_list.push_back(glm::vec3(x, y, z));

}

for (auto& location : this->location_list) {

vector<int> next_index = vector<int>();

int index = -1;

for (auto& other : this->location_list) {

index++;

if (location == other) { continue; }

float distance = glm::distance(location, other);

if (distance <= 10) {

next_index.push_back(index);

}

this->next_index_list.push_back(next_index);

}

ofColor color;

for (int i = 0; i < 650; i++) {

this->actor_list.push_back(make_unique<Actor>(this->location_list, this->next_index_list, this->destination_list));

color.setHsb(ofMap(i, 0, 500, 0, 255), 255, 255);

this->actor_list.back()->setColor(color);

}

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

void ofApp::update() {

int frame_span = 5;

int prev_index_size = 0;

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

prev_index_size = this->destination_list.size();

}

for (auto& actor : this->actor_list) {

actor->update(frame_span, this->location_list, this->next_index_list, this->destination_list);

}

if (prev_index_size != 0) {

this->destination_list.erase(this->destination_list.begin(), this->destination_list.begin() + prev_index_size);

}

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

void ofApp::draw() {

this->cam.begin();

ofTranslate(-5, -5, 0);

this->cam.setPosition(glm::vec3(0, 0, 500));

ofRotateY(ofGetFrameNum());

for (auto& actor : this->actor_list) {

actor->draw();

}

this->cam.end();

}

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

glm::vec3 ofApp::make_point(float R, float r, float u, float v) {

// 数学デッサン教室描いて楽しむ数学たち　P.31

u *= DEG_TO_RAD;

v *= DEG_TO_RAD;

auto x = (R + r * cos(u)) * cos(v);

auto y = (R + r * cos(u)) * sin(v);

auto z = r * sin(u);

return glm::vec3(x, y, z);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230716

2023年7月13日

right-angle shift. Draw by openFrameworks

[ Video ]

[ About ]
直角シフト。

[ 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) {};

	glm::vec2 make_point(int len, int param);
};

#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) {};

glm::vec2 make_point(int len, int param);

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openframeworks");

	ofBackground(39);
	ofSetLineWidth(3);
}

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

	ofSeedRandom(39);
}

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

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

	auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));
	for (int k = 0; k < 1; k++) {

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

		glm::vec3 last_location;
		float last_theta;

		for (int i = 0; i < 24; i++) {

			auto len = ofMap(ofNoise((ofGetFrameNum() + i + k * 10) * 0.04), 0, 1, 200, 500);
			auto next_len = ofMap(ofNoise((ofGetFrameNum() + i + 1 + k * 10) * 0.04), 0, 1, 200, 500);

			auto param = ofGetFrameNum() + i;
			auto next_param = ofGetFrameNum() + i + 1;

			auto location = glm::vec3(this->make_point(len, param), 0);
			auto next = glm::vec3(this->make_point(len, next_param), 0);

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

			right.push_back(location + glm::vec3(ofMap(i, 0, 24, 0, 4) * cos(theta + PI * 0.5), ofMap(i, 0, 24, 0, 4) * sin(theta + PI * 0.5), 0));
			left.push_back(location + glm::vec3(ofMap(i, 0, 24, 0, 4) * cos(theta - PI * 0.5), ofMap(i, 0, 24, 0, 4) * 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);
		}

		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(4 * cos(theta), 4 * sin(theta), 0));
			frame.push_back(last_location + glm::vec3(4 * cos(theta), 4 * sin(theta), 0));
		}

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

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

		reverse(right.begin(), right.end());
		ofColor color;
		for (int i = 0; i < 10; i++) {

			ofRotate(36);

			color.setHsb(ofMap(i, 0, 10, 0, 255), 150, 255);
			ofSetColor(color);

			ofNoFill();
			ofBeginShape();
			ofVertices(frame);
			
			ofVertices(right);
			ofVertices(left);
			ofEndShape(false);
		}

		for (int i = 0; i < 10; i++) {

			ofRotate(36);

			ofSetColor(39);
			mesh.draw();
		}
	}
}

//--------------------------------------------------------------
glm::vec2 ofApp::make_point(int len, int param) {

	param = param % 100;
	if (param < 25) {

		return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5);
	}
	else if (param < 50) {

		return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5));
	}
	else if (param < 75) {

		return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5);
	}
	else {

		return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5));
	}
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(39);

ofSetLineWidth(3);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

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

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

for (int k = 0; k < 1; k++) {

ofMesh mesh;

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

glm::vec3 last_location;

float last_theta;

for (int i = 0; i < 24; i++) {

auto len = ofMap(ofNoise((ofGetFrameNum() + i + k * 10) * 0.04), 0, 1, 200, 500);

auto next_len = ofMap(ofNoise((ofGetFrameNum() + i + 1 + k * 10) * 0.04), 0, 1, 200, 500);

auto param = ofGetFrameNum() + i;

auto next_param = ofGetFrameNum() + i + 1;

auto location = glm::vec3(this->make_point(len, param), 0);

auto next = glm::vec3(this->make_point(len, next_param), 0);

auto direction = next - location;

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

right.push_back(location + glm::vec3(ofMap(i, 0, 24, 0, 4) * cos(theta + PI * 0.5), ofMap(i, 0, 24, 0, 4) * sin(theta + PI * 0.5), 0));

left.push_back(location + glm::vec3(ofMap(i, 0, 24, 0, 4) * cos(theta - PI * 0.5), ofMap(i, 0, 24, 0, 4) * 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);

}

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(4 * cos(theta), 4 * sin(theta), 0));

frame.push_back(last_location + glm::vec3(4 * cos(theta), 4 * sin(theta), 0));

}

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

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

}

reverse(right.begin(), right.end());

ofColor color;

for (int i = 0; i < 10; i++) {

ofRotate(36);

color.setHsb(ofMap(i, 0, 10, 0, 255), 150, 255);

ofSetColor(color);

ofNoFill();

ofBeginShape();

ofVertices(frame);

ofVertices(right);

ofVertices(left);

ofEndShape(false);

}

for (int i = 0; i < 10; i++) {

ofRotate(36);

ofSetColor(39);

mesh.draw();

}

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

glm::vec2 ofApp::make_point(int len, int param) {

param = param % 100;

if (param < 25) {

return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5);

}

else if (param < 50) {

return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5));

}

else if (param < 75) {

return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5);

}

else {

return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5));

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230713

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