openframeworks – ページ 314 – プログラミング de 落描き

2021年1月17日2021年1月17日

round slices. Draw by openFrameworks

[ Video ]

[ About ]
round slices.

[ 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 setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float width, float height, int deg_start, int deg_end);

	ofEasyCam cam;
	ofMesh face, frame;
};

#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 setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float width, float height, int deg_start, int deg_end);

ofEasyCam cam;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(2);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

	this->face.clear();
	this->frame.clear();
	int deg_span = 10;
	for (int radius = 50; radius <= 200; radius += 50) {

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

			this->setRingToMesh(this->face, this->frame, glm::vec3(), radius, 35, 15, deg - deg_span * 0.5, deg + deg_span * 0.5);
		}
	}
}

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

	this->cam.begin();
	ofRotateX(90);

	ofSetColor(239);
	this->face.draw();

	ofSetColor(39);
	this->frame.drawWireframe();

	auto noise_value = ofNoise(glm::vec3(0, 0, ofGetFrameNum() * 0.015 * -1));
	auto z = ofMap(noise_value, 0, 1, -100, 100);

	ofDrawSphere(glm::vec3(0, 0, z), 10);

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float width, float height, int deg_start, int deg_end) {

	if (deg_start == deg_end) { return; }

	int index = face_target.getNumVertices();

	for (int deg = deg_start; deg < deg_end; deg += 1) {

		auto noise_value_1 = ofNoise(glm::vec3(cos(deg * DEG_TO_RAD) * 0.15, sin(deg * DEG_TO_RAD) * 0.15, radius * 0.005 + ofGetFrameNum() * 0.015 * -1));
		auto z = ofMap(noise_value_1, 0, 1, -100, 100);

		auto next_noise_value = ofNoise(glm::vec3(cos((deg + 1) * DEG_TO_RAD) * 0.15, sin((deg + 1) * DEG_TO_RAD) * 0.15, radius * 0.005 + ofGetFrameNum() * 0.015 * -1));
		auto next_z = ofMap(next_noise_value, 0, 1, -100, 100);

		auto face_index = face_target.getNumVertices();

		vector<glm::vec3> vertices;
		vertices.push_back(glm::vec3((radius + width * 0.5) * cos(deg * DEG_TO_RAD), (radius + width * 0.5) * sin(deg * DEG_TO_RAD), height * -0.5 + z));
		vertices.push_back(glm::vec3((radius + width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius + width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * -0.5 + next_z));
		vertices.push_back(glm::vec3((radius + width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius + width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * 0.5 + next_z));
		vertices.push_back(glm::vec3((radius + width * 0.5) * cos(deg * DEG_TO_RAD), (radius + width * 0.5) * sin(deg * DEG_TO_RAD), height * 0.5 + z));

		vertices.push_back(glm::vec3((radius - width * 0.5) * cos(deg * DEG_TO_RAD), (radius - width * 0.5) * sin(deg * DEG_TO_RAD), height * -0.5 + z));
		vertices.push_back(glm::vec3((radius - width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius - width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * -0.5 + next_z));
		vertices.push_back(glm::vec3((radius - width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius - width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * 0.5 + next_z));
		vertices.push_back(glm::vec3((radius - width * 0.5) * cos(deg * DEG_TO_RAD), (radius - width * 0.5) * sin(deg * DEG_TO_RAD), height * 0.5 + z));

		for (auto& vertex : vertices) {

			vertex += location;
		}

		face_target.addVertices(vertices);

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

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

		auto frame_index = frame_target.getNumVertices();

		frame_target.addVertices(vertices);

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

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

	frame_target.addIndex(index + 0); frame_target.addIndex(index + 3);
	frame_target.addIndex(index + 0); frame_target.addIndex(index + 4);
	frame_target.addIndex(index + 7); frame_target.addIndex(index + 3);
	frame_target.addIndex(index + 7); frame_target.addIndex(index + 4);

	index = frame_target.getNumVertices() - 8;

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

	frame_target.addIndex(index + 1); frame_target.addIndex(index + 2);
	frame_target.addIndex(index + 1); frame_target.addIndex(index + 5);
	frame_target.addIndex(index + 6); frame_target.addIndex(index + 2);
	frame_target.addIndex(index + 6); frame_target.addIndex(index + 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);

ofSetLineWidth(2);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

int deg_span = 10;

for (int radius = 50; radius <= 200; radius += 50) {

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

this->setRingToMesh(this->face, this->frame, glm::vec3(), radius, 35, 15, deg - deg_span * 0.5, deg + deg_span * 0.5);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(90);

ofSetColor(239);

this->face.draw();

ofSetColor(39);

this->frame.drawWireframe();

auto noise_value = ofNoise(glm::vec3(0, 0, ofGetFrameNum() * 0.015 * -1));

auto z = ofMap(noise_value, 0, 1, -100, 100);

ofDrawSphere(glm::vec3(0, 0, z), 10);

this->cam.end();

}

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

void ofApp::setRingToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float radius, float width, float height, int deg_start, int deg_end) {

if (deg_start == deg_end) { return; }

int index = face_target.getNumVertices();

for (int deg = deg_start; deg < deg_end; deg += 1) {

auto noise_value_1 = ofNoise(glm::vec3(cos(deg * DEG_TO_RAD) * 0.15, sin(deg * DEG_TO_RAD) * 0.15, radius * 0.005 + ofGetFrameNum() * 0.015 * -1));

auto z = ofMap(noise_value_1, 0, 1, -100, 100);

auto next_noise_value = ofNoise(glm::vec3(cos((deg + 1) * DEG_TO_RAD) * 0.15, sin((deg + 1) * DEG_TO_RAD) * 0.15, radius * 0.005 + ofGetFrameNum() * 0.015 * -1));

auto next_z = ofMap(next_noise_value, 0, 1, -100, 100);

auto face_index = face_target.getNumVertices();

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3((radius + width * 0.5) * cos(deg * DEG_TO_RAD), (radius + width * 0.5) * sin(deg * DEG_TO_RAD), height * -0.5 + z));

vertices.push_back(glm::vec3((radius + width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius + width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * -0.5 + next_z));

vertices.push_back(glm::vec3((radius + width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius + width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * 0.5 + next_z));

vertices.push_back(glm::vec3((radius + width * 0.5) * cos(deg * DEG_TO_RAD), (radius + width * 0.5) * sin(deg * DEG_TO_RAD), height * 0.5 + z));

vertices.push_back(glm::vec3((radius - width * 0.5) * cos(deg * DEG_TO_RAD), (radius - width * 0.5) * sin(deg * DEG_TO_RAD), height * -0.5 + z));

vertices.push_back(glm::vec3((radius - width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius - width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * -0.5 + next_z));

vertices.push_back(glm::vec3((radius - width * 0.5) * cos((deg + 1) * DEG_TO_RAD), (radius - width * 0.5) * sin((deg + 1) * DEG_TO_RAD), height * 0.5 + next_z));

vertices.push_back(glm::vec3((radius - width * 0.5) * cos(deg * DEG_TO_RAD), (radius - width * 0.5) * sin(deg * DEG_TO_RAD), height * 0.5 + z));

for (auto& vertex : vertices) {

vertex += location;

}

face_target.addVertices(vertices);

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 + 5);

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

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

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

auto frame_index = frame_target.getNumVertices();

frame_target.addVertices(vertices);

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

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

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

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

}

face_target.addIndex(index + 0); face_target.addIndex(index + 3); face_target.addIndex(index + 7);

face_target.addIndex(index + 0); face_target.addIndex(index + 7); face_target.addIndex(index + 4);

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

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

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

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

index = frame_target.getNumVertices() - 8;

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

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

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

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

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

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

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210117

2021年1月16日

Connecting circle to circle. Draw by openFrameworks

[ Movie ]

[ About ]
Connectiong circle to circle.

[ 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) {};

	ofMesh 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) {};

ofMesh line;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);
	ofEnableDepthTest();

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

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

	int radius = 50;
	int outer_deg = 0;
	ofSeedRandom(39);

	this->line.clear();

	for (int x = 72; x <= ofGetWidth(); x += 144) {

		for (int y = 72; y <= ofGetWidth(); y += 144) {

			glm::vec3 noise_seed(ofRandom(1000), ofRandom(1000), ofRandom(1000));
			outer_deg += 90;
			for (int deg = 0; deg < 360; deg += 5) {

				this->line.addVertex(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), 0));
				this->line.addVertex(glm::vec3(radius * 0.5 * cos(deg * DEG_TO_RAD), radius * 0.5 * sin(deg * DEG_TO_RAD), 0));

				auto angle_x = ofMap(ofNoise(noise_seed.x, ofGetFrameNum() * 0.005), 0, 1, -PI, PI);
				auto angle_y = ofMap(ofNoise(noise_seed.y, ofGetFrameNum() * 0.005), 0, 1, -PI, PI);
				auto angle_z = ofMap(ofNoise(noise_seed.z, ofGetFrameNum() * 0.005), 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));

				float outer_angle_x = outer_deg * DEG_TO_RAD;
				auto outer_rotationx_x = glm::rotate(glm::mat4(), outer_angle_x, glm::vec3(1, 0, 0));

				this->line.setVertex(this->line.getNumVertices() - 2,
					glm::vec3(x, y, 0) + glm::vec4(this->line.getVertex(this->line.getNumVertices() - 2), 0) * outer_rotationx_x);
				this->line.setVertex(this->line.getNumVertices() - 1,
					glm::vec3(x, y, 0) + glm::vec4(this->line.getVertex(this->line.getNumVertices() - 1), 0) * rotation_z * rotation_y * rotation_x);

				this->line.addIndex(this->line.getNumVertices() - 2);
				this->line.addIndex(this->line.getNumVertices() - 1);
			}
		}
	}
}

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

	this->line.draw();

	for (auto& vertex : this->line.getVertices()) {

		ofDrawSphere(vertex, 1);
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetColor(39);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

int radius = 50;

int outer_deg = 0;

ofSeedRandom(39);

this->line.clear();

for (int x = 72; x <= ofGetWidth(); x += 144) {

for (int y = 72; y <= ofGetWidth(); y += 144) {

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

outer_deg += 90;

for (int deg = 0; deg < 360; deg += 5) {

this->line.addVertex(glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), 0));

this->line.addVertex(glm::vec3(radius * 0.5 * cos(deg * DEG_TO_RAD), radius * 0.5 * sin(deg * DEG_TO_RAD), 0));

auto angle_x = ofMap(ofNoise(noise_seed.x, ofGetFrameNum() * 0.005), 0, 1, -PI, PI);

auto angle_y = ofMap(ofNoise(noise_seed.y, ofGetFrameNum() * 0.005), 0, 1, -PI, PI);

auto angle_z = ofMap(ofNoise(noise_seed.z, ofGetFrameNum() * 0.005), 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));

float outer_angle_x = outer_deg * DEG_TO_RAD;

auto outer_rotationx_x = glm::rotate(glm::mat4(), outer_angle_x, glm::vec3(1, 0, 0));

this->line.setVertex(this->line.getNumVertices() - 2,

glm::vec3(x, y, 0) + glm::vec4(this->line.getVertex(this->line.getNumVertices() - 2), 0) * outer_rotationx_x);

this->line.setVertex(this->line.getNumVertices() - 1,

glm::vec3(x, y, 0) + glm::vec4(this->line.getVertex(this->line.getNumVertices() - 1), 0) * rotation_z * rotation_y * rotation_x);

this->line.addIndex(this->line.getNumVertices() - 2);

this->line.addIndex(this->line.getNumVertices() - 1);

}

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

void ofApp::draw() {

this->line.draw();

for (auto& vertex : this->line.getVertices()) {

ofDrawSphere(vertex, 1);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210116

2021年1月15日2021年1月15日

The Prismatic Sun. Draw by openFrameworks

[ Video ]

[ About ]
The Prismatic Sun.

[ 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) {};

	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) {};

ofMesh mesh;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetCircleResolution(60);
}

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

	this->mesh.clear();
	
	int deg_span = 6;
	ofColor color;
	for (int deg = 0; deg < 360; deg += deg_span * 2) {

		for (int radius = 50; radius < 720; radius += 15) {

			int hue = ((int)ofMap(deg, 0, 360, 0, 255) + radius / 2 - ofGetFrameNum()) % 255;
			color.setHsb(hue, 255, 255);

			this->mesh.addVertex(glm::vec3(radius * cos((deg + deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg + deg_span * 0.5) * DEG_TO_RAD), 0));
			this->mesh.addVertex(glm::vec3(radius * cos((deg - deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg - deg_span * 0.5) * DEG_TO_RAD), 0));
			this->mesh.addColor(color);
			this->mesh.addColor(color);

			if (radius > 50) {

				this->mesh.addIndex(this->mesh.getNumVertices() - 1); this->mesh.addIndex(this->mesh.getNumVertices() - 3); this->mesh.addIndex(this->mesh.getNumVertices() - 4);
				this->mesh.addIndex(this->mesh.getNumVertices() - 1); this->mesh.addIndex(this->mesh.getNumVertices() - 2); this->mesh.addIndex(this->mesh.getNumVertices() - 4);
			}

		}
	}


	this->mesh.addVertex(glm::vec3());
	this->mesh.addColor(ofColor(255));
	int center_index = this->mesh.getNumVertices() - 1;
	for (int deg = 0; deg < 360; deg += deg_span) {

		int hue = ((int)ofMap(deg, 0, 360, 0, 255) - ofGetFrameNum()) % 255;
		color.setHsb(hue, 255, 255);

		this->mesh.addVertex(glm::vec3(35 * cos((deg + deg_span) * DEG_TO_RAD), 35 * sin((deg + deg_span) * DEG_TO_RAD), 0));
		this->mesh.addVertex(glm::vec3(35 * cos((deg - deg_span) * DEG_TO_RAD), 35 * sin((deg - deg_span) * DEG_TO_RAD), 0));

		this->mesh.addColor(color);
		this->mesh.addColor(color);

		this->mesh.addIndex(center_index);
		this->mesh.addIndex(this->mesh.getNumVertices() - 2);
		this->mesh.addIndex(this->mesh.getNumVertices() - 1);

		
	}
}

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

	ofTranslate(ofGetWindowSize() * 0.5);

	this->mesh.draw();

	ofSetColor(239);
	ofFill();
	ofDrawRectangle(glm::vec2(ofGetWidth() * -0.5, ofGetHeight() * -0.5), ofGetWidth(), 30);
	ofDrawRectangle(glm::vec2(ofGetWidth() * -0.5, ofGetHeight() *  0.5), ofGetWidth(), -30);
	ofDrawRectangle(glm::vec2(ofGetWidth() * -0.5, ofGetHeight() * -0.5), 30, ofGetHeight());
	ofDrawRectangle(glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * -0.5), -30, ofGetHeight());
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetCircleResolution(60);

}

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

void ofApp::update() {

this->mesh.clear();

int deg_span = 6;

ofColor color;

for (int deg = 0; deg < 360; deg += deg_span * 2) {

for (int radius = 50; radius < 720; radius += 15) {

int hue = ((int)ofMap(deg, 0, 360, 0, 255) + radius / 2 - ofGetFrameNum()) % 255;

color.setHsb(hue, 255, 255);

this->mesh.addVertex(glm::vec3(radius * cos((deg + deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg + deg_span * 0.5) * DEG_TO_RAD), 0));

this->mesh.addVertex(glm::vec3(radius * cos((deg - deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg - deg_span * 0.5) * DEG_TO_RAD), 0));

this->mesh.addColor(color);

if (radius > 50) {

this->mesh.addIndex(this->mesh.getNumVertices() - 1); this->mesh.addIndex(this->mesh.getNumVertices() - 3); this->mesh.addIndex(this->mesh.getNumVertices() - 4);

this->mesh.addIndex(this->mesh.getNumVertices() - 1); this->mesh.addIndex(this->mesh.getNumVertices() - 2); this->mesh.addIndex(this->mesh.getNumVertices() - 4);

}

this->mesh.addVertex(glm::vec3());

this->mesh.addColor(ofColor(255));

int center_index = this->mesh.getNumVertices() - 1;

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

int hue = ((int)ofMap(deg, 0, 360, 0, 255) - ofGetFrameNum()) % 255;

color.setHsb(hue, 255, 255);

this->mesh.addVertex(glm::vec3(35 * cos((deg + deg_span) * DEG_TO_RAD), 35 * sin((deg + deg_span) * DEG_TO_RAD), 0));

this->mesh.addVertex(glm::vec3(35 * cos((deg - deg_span) * DEG_TO_RAD), 35 * sin((deg - deg_span) * DEG_TO_RAD), 0));

this->mesh.addColor(color);

this->mesh.addIndex(center_index);

this->mesh.addIndex(this->mesh.getNumVertices() - 2);

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

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

this->mesh.draw();

ofSetColor(239);

ofFill();

ofDrawRectangle(glm::vec2(ofGetWidth() * -0.5, ofGetHeight() * -0.5), ofGetWidth(), 30);

ofDrawRectangle(glm::vec2(ofGetWidth() * -0.5, ofGetHeight() * 0.5), ofGetWidth(), -30);

ofDrawRectangle(glm::vec2(ofGetWidth() * -0.5, ofGetHeight() * -0.5), 30, ofGetHeight());

ofDrawRectangle(glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * -0.5), -30, ofGetHeight());

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210115/

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