プログラミング de 落描き – ページ 217 – クリエイティブ・コーディングによる生成物とソース

2022年7月16日2022年7月14日

Connect point of torus. Draw by openFrameworks

[ Video ]

[ About ]
トーラスの中にある座標を結ぶ。

Connect point of torus.

[ 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) {};

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

	ofEasyCam cam;

	ofMesh mesh;
};

#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) {};

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

ofEasyCam cam;

ofMesh mesh;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

	vector<glm::vec3> location_list;
	vector<float> min_distance_list;
	vector<vector<int>> pair_list;

	for (int i = 0; i < 2000; i++) {

		auto R = 300;
		auto r = ofRandom(30, 80);
		auto u = ofRandom(360) + ofGetFrameNum() * ofRandom(0.25, 1.0) * (ofRandom(1) < 1 ? 1 : -1);
		auto v = ofRandom(360) + ofGetFrameNum() * ofRandom(0.25, 1.0) * (ofRandom(1) < 1 ? 1 : -1);

		location_list.push_back(this->make_point(R, r, u, v));
		min_distance_list.push_back(20);
		vector<int> pair;
		pair_list.push_back(pair);
	}

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

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

			if (i == k) { continue; }

			auto distance = glm::distance(location_list[i], location_list[k]);

			if (distance < 20) {

				pair_list[i].push_back(k);
				if (min_distance_list[i] > distance) {

					min_distance_list[i] = distance;
				}
			}
		}
	}

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

		this->mesh.addColor(ofColor(255, ofMap(min_distance_list[i], 0, 20, 255, 0)));
		for (int k = 0; k < pair_list[i].size(); k++) {

			this->mesh.addIndex(i);
			this->mesh.addIndex(pair_list[i][k]);
		}
	}
}

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

	this->cam.begin();
	
	this->mesh.drawWireframe();

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

		ofSetColor(this->mesh.getColor(i));
		ofDrawSphere(this->mesh.getVertex(i), 3);
	}
	
	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"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(0);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

vector<glm::vec3> location_list;

vector<float> min_distance_list;

vector<vector<int>> pair_list;

for (int i = 0; i < 2000; i++) {

auto R = 300;

auto r = ofRandom(30, 80);

auto u = ofRandom(360) + ofGetFrameNum() * ofRandom(0.25, 1.0) * (ofRandom(1) < 1 ? 1 : -1);

auto v = ofRandom(360) + ofGetFrameNum() * ofRandom(0.25, 1.0) * (ofRandom(1) < 1 ? 1 : -1);

location_list.push_back(this->make_point(R, r, u, v));

min_distance_list.push_back(20);

vector<int> pair;

pair_list.push_back(pair);

}

this->mesh.clear();

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

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

if (i == k) { continue; }

auto distance = glm::distance(location_list[i], location_list[k]);

if (distance < 20) {

pair_list[i].push_back(k);

if (min_distance_list[i] > distance) {

min_distance_list[i] = distance;

}

this->mesh.addVertices(location_list);

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

this->mesh.addColor(ofColor(255, ofMap(min_distance_list[i], 0, 20, 255, 0)));

for (int k = 0; k < pair_list[i].size(); k++) {

this->mesh.addIndex(i);

this->mesh.addIndex(pair_list[i][k]);

}

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

void ofApp::draw() {

this->cam.begin();

this->mesh.drawWireframe();

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

ofSetColor(this->mesh.getColor(i));

ofDrawSphere(this->mesh.getVertex(i), 3);

}

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/Insta20220716

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2022年7月15日2022年7月14日

Twisting boxes. Draw by openFrameworks

[ Video ]

[ About ]
ねじり箱。

Twisting boxes.

[ 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) {};

	void setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float size);
	void setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float height, float width, float depth);

	ofEasyCam cam;
	ofMesh face, line;
};

#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) {};

void setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float size);

void setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float height, float width, float depth);

ofEasyCam cam;

ofMesh face, line;

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofEnableDepthTest();

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

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

	this->face.clear();
	this->line.clear();

	for (int x = -300; x <= 300; x += 30) {

		for (int y = -300; y <= 300; y += 30) {

			this->setBoxToMesh(this->face, this->line, glm::vec3(x, y, 0), 20);
		}
	}
	
}

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

	this->cam.begin();

	ofSetColor(0);
	this->face.draw();

	ofSetColor(255);
	this->line.drawWireframe();

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float size) {

	this->setBoxToMesh(face_target, frame_target, location, size, size, size);
}

//--------------------------------------------------------------
void ofApp::setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float height, float width, float depth) {

	int face_index = face_target.getNumVertices();
	int frame_index = frame_target.getNumVertices();

	vector<glm::vec3> vertices;
	vertices.push_back(glm::vec3(width * -0.5 * 0.99, height * 0.5 * 0.99, depth * -0.5 * 0.99));
	vertices.push_back(glm::vec3(width * 0.5 * 0.99, height * 0.5 * 0.99, depth * -0.5 * 0.99));
	vertices.push_back(glm::vec3(width * 0.5 * 0.99, height * 0.5 * 0.99, depth * 0.5 * 0.99));
	vertices.push_back(glm::vec3(width * -0.5 * 0.99, height * 0.5 * 0.99, depth * 0.5 * 0.99));
	vertices.push_back(glm::vec3(width * -0.5 * 0.99, height * -0.5 * 0.99, depth * -0.5 * 0.99));
	vertices.push_back(glm::vec3(width * 0.5 * 0.99, height * -0.5 * 0.99, depth * -0.5 * 0.99));
	vertices.push_back(glm::vec3(width * 0.5 * 0.99, height * -0.5 * 0.99, depth * 0.5 * 0.99));
	vertices.push_back(glm::vec3(width * -0.5 * 0.99, height * -0.5 * 0.99, depth * 0.5 * 0.99));

	for (auto& vertex : vertices) {

		auto noise_deg = glm::vec3(
			ofMap(ofNoise(glm::vec4((location + vertex) * 0.0035, ofGetFrameNum() * 0.005)), 0, 1, -360, 360),
			ofMap(ofNoise(glm::vec4((location + vertex) * 0.0035, ofGetFrameNum() * 0.005)), 0, 1, -360, 360),
			ofMap(ofNoise(glm::vec4((location + vertex) * 0.0035, ofGetFrameNum() * 0.005)), 0, 1, -360, 360));

		auto rotation_x = glm::rotate(glm::mat4(), noise_deg.x * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));
		auto rotation_y = glm::rotate(glm::mat4(), noise_deg.y * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));
		auto rotation_z = glm::rotate(glm::mat4(), noise_deg.z * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));

		face_target.addVertex(location + glm::vec4(vertex, 0) * rotation_z * rotation_y * rotation_z);
		frame_target.addVertex(location + glm::vec4(vertex, 0) * rotation_z * rotation_y * rotation_z);
	}

	face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 1); face_target.addIndex(face_index + 2);
	face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 2); face_target.addIndex(face_index + 3);

	face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 5); face_target.addIndex(face_index + 6);
	face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 6); face_target.addIndex(face_index + 7);

	face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 1);
	face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 5); face_target.addIndex(face_index + 1);

	face_target.addIndex(face_index + 1); face_target.addIndex(face_index + 5); face_target.addIndex(face_index + 6);
	face_target.addIndex(face_index + 6); face_target.addIndex(face_index + 2); face_target.addIndex(face_index + 1);

	face_target.addIndex(face_index + 2); face_target.addIndex(face_index + 6); face_target.addIndex(face_index + 7);
	face_target.addIndex(face_index + 7); face_target.addIndex(face_index + 3); face_target.addIndex(face_index + 2);

	face_target.addIndex(face_index + 3); face_target.addIndex(face_index + 7); face_target.addIndex(face_index + 4);
	face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 3);

	frame_target.addIndex(frame_index + 0); frame_target.addIndex(frame_index + 1);
	frame_target.addIndex(frame_index + 1); frame_target.addIndex(frame_index + 2);
	frame_target.addIndex(frame_index + 2); frame_target.addIndex(frame_index + 3);
	frame_target.addIndex(frame_index + 3); frame_target.addIndex(frame_index + 0);

	frame_target.addIndex(frame_index + 4); frame_target.addIndex(frame_index + 5);
	frame_target.addIndex(frame_index + 5); frame_target.addIndex(frame_index + 6);
	frame_target.addIndex(frame_index + 6); frame_target.addIndex(frame_index + 7);
	frame_target.addIndex(frame_index + 7); frame_target.addIndex(frame_index + 4);

	frame_target.addIndex(frame_index + 0); frame_target.addIndex(frame_index + 4);
	frame_target.addIndex(frame_index + 1); frame_target.addIndex(frame_index + 5);
	frame_target.addIndex(frame_index + 2); frame_target.addIndex(frame_index + 6);
	frame_target.addIndex(frame_index + 3); frame_target.addIndex(frame_index + 7);
}

//--------------------------------------------------------------
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(255);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

this->face.clear();

this->line.clear();

for (int x = -300; x <= 300; x += 30) {

for (int y = -300; y <= 300; y += 30) {

this->setBoxToMesh(this->face, this->line, glm::vec3(x, y, 0), 20);

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(0);

this->face.draw();

ofSetColor(255);

this->line.drawWireframe();

this->cam.end();

}

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

void ofApp::setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float size) {

this->setBoxToMesh(face_target, frame_target, location, size, size, size);

}

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

void ofApp::setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float height, float width, float depth) {

int face_index = face_target.getNumVertices();

int frame_index = frame_target.getNumVertices();

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(width * -0.5 * 0.99, height * 0.5 * 0.99, depth * -0.5 * 0.99));

vertices.push_back(glm::vec3(width * 0.5 * 0.99, height * 0.5 * 0.99, depth * -0.5 * 0.99));

vertices.push_back(glm::vec3(width * 0.5 * 0.99, height * 0.5 * 0.99, depth * 0.5 * 0.99));

vertices.push_back(glm::vec3(width * -0.5 * 0.99, height * 0.5 * 0.99, depth * 0.5 * 0.99));

vertices.push_back(glm::vec3(width * -0.5 * 0.99, height * -0.5 * 0.99, depth * -0.5 * 0.99));

vertices.push_back(glm::vec3(width * 0.5 * 0.99, height * -0.5 * 0.99, depth * -0.5 * 0.99));

vertices.push_back(glm::vec3(width * 0.5 * 0.99, height * -0.5 * 0.99, depth * 0.5 * 0.99));

vertices.push_back(glm::vec3(width * -0.5 * 0.99, height * -0.5 * 0.99, depth * 0.5 * 0.99));

for (auto& vertex : vertices) {

auto noise_deg = glm::vec3(

ofMap(ofNoise(glm::vec4((location + vertex) * 0.0035, ofGetFrameNum() * 0.005)), 0, 1, -360, 360),

ofMap(ofNoise(glm::vec4((location + vertex) * 0.0035, ofGetFrameNum() * 0.005)), 0, 1, -360, 360));

auto rotation_x = glm::rotate(glm::mat4(), noise_deg.x * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));

auto rotation_y = glm::rotate(glm::mat4(), noise_deg.y * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));

auto rotation_z = glm::rotate(glm::mat4(), noise_deg.z * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));

face_target.addVertex(location + glm::vec4(vertex, 0) * rotation_z * rotation_y * rotation_z);

frame_target.addVertex(location + glm::vec4(vertex, 0) * rotation_z * rotation_y * rotation_z);

}

face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 1); face_target.addIndex(face_index + 2);

face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 2); face_target.addIndex(face_index + 3);

face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 5); face_target.addIndex(face_index + 6);

face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 6); face_target.addIndex(face_index + 7);

face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 1);

face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 5); face_target.addIndex(face_index + 1);

face_target.addIndex(face_index + 1); face_target.addIndex(face_index + 5); face_target.addIndex(face_index + 6);

face_target.addIndex(face_index + 6); face_target.addIndex(face_index + 2); face_target.addIndex(face_index + 1);

face_target.addIndex(face_index + 2); face_target.addIndex(face_index + 6); face_target.addIndex(face_index + 7);

face_target.addIndex(face_index + 7); face_target.addIndex(face_index + 3); face_target.addIndex(face_index + 2);

face_target.addIndex(face_index + 3); face_target.addIndex(face_index + 7); face_target.addIndex(face_index + 4);

face_target.addIndex(face_index + 4); face_target.addIndex(face_index + 0); face_target.addIndex(face_index + 3);

frame_target.addIndex(frame_index + 0); frame_target.addIndex(frame_index + 1);

frame_target.addIndex(frame_index + 1); frame_target.addIndex(frame_index + 2);

frame_target.addIndex(frame_index + 2); frame_target.addIndex(frame_index + 3);

frame_target.addIndex(frame_index + 3); frame_target.addIndex(frame_index + 0);

frame_target.addIndex(frame_index + 4); frame_target.addIndex(frame_index + 5);

frame_target.addIndex(frame_index + 5); frame_target.addIndex(frame_index + 6);

frame_target.addIndex(frame_index + 6); frame_target.addIndex(frame_index + 7);

frame_target.addIndex(frame_index + 7); frame_target.addIndex(frame_index + 4);

frame_target.addIndex(frame_index + 0); frame_target.addIndex(frame_index + 4);

frame_target.addIndex(frame_index + 1); frame_target.addIndex(frame_index + 5);

frame_target.addIndex(frame_index + 2); frame_target.addIndex(frame_index + 6);

frame_target.addIndex(frame_index + 3); frame_target.addIndex(frame_index + 7);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220715

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2022年7月14日2022年7月14日

Symmetry. Draw by openFrameworks

[ Video ]

[ About ]
2色の対称性の動き。

Symmetry.

[ 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) {};
};

#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) {};

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofSetLineWidth(2);
	ofSetCircleResolution(60);
	ofEnableDepthTest();
}

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

	ofSeedRandom(39);
}

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

	ofTranslate(ofGetWindowSize() * 0.5);

	ofSetColor(239, 39, 39);
	ofFill();
	ofDrawCircle(glm::vec3(0, 0, -1), 320);

	ofSetColor(39);
	ofNoFill();
	ofDrawCircle(glm::vec3(0, 0, -1), 320);

	auto head_size = 19;

	for (int k = 0; k < 2; k++) {

		ofMesh mesh;
		vector<glm::vec3> right, left, frame;
		auto noise_seed_deg = ofRandom(1000);
		auto noise_seed_radius = ofRandom(1000);

		glm::vec3 last_location;
		float last_theta, last_radius;

		for (int i = 0; i < 25; i++) {

			auto noise_deg = ofMap(ofNoise(noise_seed_deg, (ofGetFrameNum() + i) * 0.005), 0, 1, -360, 360);
			auto noise_radius = ofMap(ofNoise(noise_seed_radius, (ofGetFrameNum() + i) * 0.01), 0, 1, -350, 350);
			auto next_noise_deg = ofMap(ofNoise(noise_seed_deg, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -360, 360);
			auto next_noise_radius = ofMap(ofNoise(noise_seed_radius, (ofGetFrameNum() + i + 1) * 0.01), 0, 1, -350, 350);

			auto location = glm::vec3(noise_radius * cos(noise_deg * DEG_TO_RAD), noise_radius * sin(noise_deg * DEG_TO_RAD), 0);
			auto next = glm::vec3(next_noise_radius * cos(next_noise_deg * DEG_TO_RAD), next_noise_radius * sin(next_noise_deg * DEG_TO_RAD), 0);

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

			right.push_back(location + glm::vec3(ofMap(i, 0, 25, 0, head_size) * cos(theta + PI * 0.5), ofMap(i, 0, 25, 0, head_size) * sin(theta + PI * 0.5), 0));
			left.push_back(location + glm::vec3(ofMap(i, 0, 25, 0, head_size) * cos(theta - PI * 0.5), ofMap(i, 0, 25, 0, head_size) * sin(theta - PI * 0.5), 0));

			last_location = location;
			last_theta = theta;
			last_radius = noise_radius;
		}

		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(mesh.getNumVertices() - 2, 0, mesh.getNumVertices(), 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));
			frame.push_back(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);
		}

		k == 0 ? ofSetColor(255) : ofSetColor(0);

		int span = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.003), 0, 1, 1, 7);
		int deg_span = 360 / span;
		for (int deg = 0; deg < 360; deg += 30) {

			ofRotate(deg_span);
			mesh.draw();
		}

		ofNoFill();
		ofDrawCircle(glm::vec3(), last_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(255);

ofSetLineWidth(2);

ofSetCircleResolution(60);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

ofSetColor(239, 39, 39);

ofFill();

ofDrawCircle(glm::vec3(0, 0, -1), 320);

ofSetColor(39);

ofNoFill();

ofDrawCircle(glm::vec3(0, 0, -1), 320);

auto head_size = 19;

for (int k = 0; k < 2; k++) {

ofMesh mesh;

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

auto noise_seed_deg = ofRandom(1000);

auto noise_seed_radius = ofRandom(1000);

glm::vec3 last_location;

float last_theta, last_radius;

for (int i = 0; i < 25; i++) {

auto noise_deg = ofMap(ofNoise(noise_seed_deg, (ofGetFrameNum() + i) * 0.005), 0, 1, -360, 360);

auto noise_radius = ofMap(ofNoise(noise_seed_radius, (ofGetFrameNum() + i) * 0.01), 0, 1, -350, 350);

auto next_noise_deg = ofMap(ofNoise(noise_seed_deg, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -360, 360);

auto next_noise_radius = ofMap(ofNoise(noise_seed_radius, (ofGetFrameNum() + i + 1) * 0.01), 0, 1, -350, 350);

auto location = glm::vec3(noise_radius * cos(noise_deg * DEG_TO_RAD), noise_radius * sin(noise_deg * DEG_TO_RAD), 0);

auto next = glm::vec3(next_noise_radius * cos(next_noise_deg * DEG_TO_RAD), next_noise_radius * sin(next_noise_deg * DEG_TO_RAD), 0);

auto direction = next - location;

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

right.push_back(location + glm::vec3(ofMap(i, 0, 25, 0, head_size) * cos(theta + PI * 0.5), ofMap(i, 0, 25, 0, head_size) * sin(theta + PI * 0.5), 0));

left.push_back(location + glm::vec3(ofMap(i, 0, 25, 0, head_size) * cos(theta - PI * 0.5), ofMap(i, 0, 25, 0, head_size) * sin(theta - PI * 0.5), 0));

last_location = location;

last_theta = theta;

last_radius = noise_radius;

}

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(mesh.getNumVertices() - 2, 0, mesh.getNumVertices(), 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));

frame.push_back(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);

}

k == 0 ? ofSetColor(255) : ofSetColor(0);

int span = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.003), 0, 1, 1, 7);

int deg_span = 360 / span;

for (int deg = 0; deg < 360; deg += 30) {

ofRotate(deg_span);

mesh.draw();

}

ofNoFill();

ofDrawCircle(glm::vec3(), last_radius);

ofPopMatrix();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220714

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