ofMesh – ページ 40 – プログラミング de 落描き

2022年10月27日

shake. Draw by openFrameworks

[ Video ]

[ About ]
のびーん。

[ 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;
	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 windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofEasyCam cam;

ofMesh mesh;

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofSetColor(0);

	ofEnableDepthTest();
	ofSetLineWidth(2);

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

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

	ofSeedRandom(39);

	this->mesh.clear();

	auto noise_param = glm::vec3(ofRandom(360), ofRandom(360), ofRandom(360));

	for (int radius = 50; radius <= 300; radius += 50) {

		auto rotation = glm::vec3(
			ofMap(ofNoise(noise_param.x, radius * 0.0065 - ofGetFrameNum() * 0.02), 0, 1, -90, 90),
			ofMap(ofNoise(noise_param.y, radius * 0.0065 - ofGetFrameNum() * 0.02), 0, 1, -90, 90),
			ofMap(ofNoise(noise_param.z, radius * 0.0065 - ofGetFrameNum() * 0.02), 0, 1, -90, 90));

		int start_index = this->mesh.getNumVertices();
		int index = start_index;
		for (int deg = 0; deg < 360; deg += 1) {

			auto vertex = glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), 0);

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

			if (radius % 100 != 0) {

				vertex = glm::vec4(vertex, 0) * rotation_y * rotation_x;
			}

			this->mesh.addVertex(vertex);

			if (deg > 0) {

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

			index++;
		}

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

	int index_span = 30;
	for (int index = 0; index < this->mesh.getNumVertices() - 360; index += index_span) {

		this->mesh.addIndex(index);
		this->mesh.addIndex(index + 360);
	}
}

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

	this->cam.begin();
	ofRotateX(-70);

	this->mesh.drawWireframe();

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(255);

ofSetColor(0);

ofEnableDepthTest();

ofSetLineWidth(2);

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->mesh.clear();

auto noise_param = glm::vec3(ofRandom(360), ofRandom(360), ofRandom(360));

for (int radius = 50; radius <= 300; radius += 50) {

auto rotation = glm::vec3(

ofMap(ofNoise(noise_param.x, radius * 0.0065 - ofGetFrameNum() * 0.02), 0, 1, -90, 90),

ofMap(ofNoise(noise_param.y, radius * 0.0065 - ofGetFrameNum() * 0.02), 0, 1, -90, 90),

ofMap(ofNoise(noise_param.z, radius * 0.0065 - ofGetFrameNum() * 0.02), 0, 1, -90, 90));

int start_index = this->mesh.getNumVertices();

int index = start_index;

for (int deg = 0; deg < 360; deg += 1) {

auto vertex = glm::vec3(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), 0);

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

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

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

if (radius % 100 != 0) {

vertex = glm::vec4(vertex, 0) * rotation_y * rotation_x;

}

this->mesh.addVertex(vertex);

if (deg > 0) {

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

this->mesh.addIndex(index);

}

index++;

}

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

this->mesh.addIndex(start_index);

}

int index_span = 30;

for (int index = 0; index < this->mesh.getNumVertices() - 360; index += index_span) {

this->mesh.addIndex(index);

this->mesh.addIndex(index + 360);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(-70);

this->mesh.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20221027

2022年10月22日

ring of squares. draw by openFrameworks

[ Video ]

[ About ]
四角の輪。

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

	ofEasyCam cam;
};

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

ofEasyCam cam;

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofSetLineWidth(3);
	ofEnableDepthTest();
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	int v_span = 8;
	int u_span = 90;
	int R = 200;

	ofMesh face, line;
	line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

	float noise_seed = ofRandom(1000);
	for (int v = 0; v <= 360; v += v_span) {

		int u_start = ofMap(ofNoise(noise_seed, cos(v * DEG_TO_RAD) * 0.25, sin(v * DEG_TO_RAD) * 0.25, ofGetFrameNum() * 0.015), 0, 1, -360, 360);
		int next_u = ofMap(ofNoise(noise_seed, cos((v + v_span * 0.9) * DEG_TO_RAD) * 0.25, sin((v + v_span * 0.9) * DEG_TO_RAD) * 0.25, ofGetFrameNum() * 0.015), 0, 1, -360, 360);
		int r = ofMap(ofNoise(glm::vec4(this->make_point(R, 30, u_start, v) * 0.01, ofGetFrameNum() * 0.05)), 0, 1, 0, 150);
		for (int u = u_start; u < u_start + 360; u += u_span) {

			face.addVertex(this->make_point(R, r, u, v));
			face.addVertex(this->make_point(R, r, u + u_span, v));
			face.addVertex(this->make_point(R, r, next_u + u_span, v + v_span * 0.8));
			face.addVertex(this->make_point(R, r, next_u, v + v_span * 0.8));

			line.addVertex(this->make_point(R, r, u, v));
			line.addVertex(this->make_point(R, r, u + u_span, v));
			line.addVertex(this->make_point(R, r, next_u + u_span, v + v_span * 0.8));
			line.addVertex(this->make_point(R, r, next_u, v + v_span * 0.8));

			ofColor face_color = ofColor(0);
			ofColor line_color = ofColor(255);

			face.addColor(face_color);
			face.addColor(face_color);
			face.addColor(face_color);
			face.addColor(face_color);

			line.addColor(line_color);
			line.addColor(line_color);
			line.addColor(line_color);
			line.addColor(line_color);

			face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); face.addIndex(face.getNumVertices() - 3);
			face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 4);

			line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 4);
			line.addIndex(line.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 3);

			line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 2);
			line.addIndex(line.getNumVertices() - 3); line.addIndex(line.getNumVertices() - 4);

			next_u += u_span;

		}
	}

	face.drawFaces();
	line.drawWireframe();

	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());
}

100

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(255);

ofSetLineWidth(3);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

int v_span = 8;

int u_span = 90;

int R = 200;

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

float noise_seed = ofRandom(1000);

for (int v = 0; v <= 360; v += v_span) {

int u_start = ofMap(ofNoise(noise_seed, cos(v * DEG_TO_RAD) * 0.25, sin(v * DEG_TO_RAD) * 0.25, ofGetFrameNum() * 0.015), 0, 1, -360, 360);

int next_u = ofMap(ofNoise(noise_seed, cos((v + v_span * 0.9) * DEG_TO_RAD) * 0.25, sin((v + v_span * 0.9) * DEG_TO_RAD) * 0.25, ofGetFrameNum() * 0.015), 0, 1, -360, 360);

int r = ofMap(ofNoise(glm::vec4(this->make_point(R, 30, u_start, v) * 0.01, ofGetFrameNum() * 0.05)), 0, 1, 0, 150);

for (int u = u_start; u < u_start + 360; u += u_span) {

face.addVertex(this->make_point(R, r, u, v));

face.addVertex(this->make_point(R, r, u + u_span, v));

face.addVertex(this->make_point(R, r, next_u + u_span, v + v_span * 0.8));

face.addVertex(this->make_point(R, r, next_u, v + v_span * 0.8));

line.addVertex(this->make_point(R, r, u, v));

line.addVertex(this->make_point(R, r, u + u_span, v));

line.addVertex(this->make_point(R, r, next_u + u_span, v + v_span * 0.8));

line.addVertex(this->make_point(R, r, next_u, v + v_span * 0.8));

ofColor face_color = ofColor(0);

ofColor line_color = ofColor(255);

face.addColor(face_color);

line.addColor(line_color);

face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); face.addIndex(face.getNumVertices() - 3);

face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 4);

line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 4);

line.addIndex(line.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 3);

line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 2);

line.addIndex(line.getNumVertices() - 3); line.addIndex(line.getNumVertices() - 4);

next_u += u_span;

}

face.drawFaces();

line.drawWireframe();

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/Insta20221022

2022年10月16日

color vortex. Draw by openFrameworks

[ Video ]

[ About ]
色の渦。

[ 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 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 windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofMesh mesh;

};

#include "ofApp.h"

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

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

	ofBackground(255);
}

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

	this->mesh.clear();

	int radius_span = 5;
	int deg_span = 60;

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

		for (int radius = 30; radius < 600; radius += radius_span) {

			float circle_deg = deg + ofMap(radius, 30, 600, 0, 180);
			float next_ciecle_deg = deg + ofMap(radius + radius_span, 30, 600, 0, 180);

			this->mesh.addVertex(glm::vec3(radius * cos((circle_deg - deg_span * 0.2) * DEG_TO_RAD), radius * sin((circle_deg - deg_span * 0.2) * DEG_TO_RAD), 0));
			this->mesh.addVertex(glm::vec3(radius * cos((circle_deg + deg_span * 0.2) * DEG_TO_RAD), radius * sin((circle_deg + deg_span * 0.2) * DEG_TO_RAD), 0));
			this->mesh.addVertex(glm::vec3((radius + radius_span) * cos((next_ciecle_deg + deg_span * 0.2) * DEG_TO_RAD), (radius + radius_span) * sin((next_ciecle_deg + deg_span * 0.2) * DEG_TO_RAD), 0));
			this->mesh.addVertex(glm::vec3((radius + radius_span) * cos((next_ciecle_deg - deg_span * 0.2) * DEG_TO_RAD), (radius + radius_span) * sin((next_ciecle_deg - deg_span * 0.2) * DEG_TO_RAD), 0));

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

			ofColor color;
			color.setHsb(ofMap((radius + ofGetFrameNum() * 15) % 600, 0, 500, 0, 255), 130, 255);

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

	for (int deg = deg_span * 0.5; deg < 360 + deg_span; deg += deg_span) {

		for (int radius = 30; radius < 600; radius += radius_span) {

			float circle_deg = deg + ofMap(radius, 30, 600, 0, 180);
			float next_ciecle_deg = deg + ofMap(radius + radius_span, 30, 600, 0, 180);

			this->mesh.addVertex(glm::vec3(radius * cos((circle_deg - deg_span * 0.2) * DEG_TO_RAD), radius * sin((circle_deg - deg_span * 0.2) * DEG_TO_RAD), 0));
			this->mesh.addVertex(glm::vec3(radius * cos((circle_deg + deg_span * 0.2) * DEG_TO_RAD), radius * sin((circle_deg + deg_span * 0.2) * DEG_TO_RAD), 0));
			this->mesh.addVertex(glm::vec3((radius + radius_span) * cos((next_ciecle_deg + deg_span * 0.2) * DEG_TO_RAD), (radius + radius_span) * sin((next_ciecle_deg + deg_span * 0.2) * DEG_TO_RAD), 0));
			this->mesh.addVertex(glm::vec3((radius + radius_span) * cos((next_ciecle_deg - deg_span * 0.2) * DEG_TO_RAD), (radius + radius_span) * sin((next_ciecle_deg - deg_span * 0.2) * DEG_TO_RAD), 0));

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

			ofColor color;
			color.setHsb(ofMap(600 - (radius + ofGetFrameNum() * 15) % 500, 0, 500, 0, 255), 130, 255);

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

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

	ofTranslate(ofGetWindowSize() * 0.5);

	this->mesh.draw();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(255);

}

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

void ofApp::update() {

this->mesh.clear();

int radius_span = 5;

int deg_span = 60;

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

for (int radius = 30; radius < 600; radius += radius_span) {

float circle_deg = deg + ofMap(radius, 30, 600, 0, 180);

float next_ciecle_deg = deg + ofMap(radius + radius_span, 30, 600, 0, 180);

this->mesh.addVertex(glm::vec3(radius * cos((circle_deg - deg_span * 0.2) * DEG_TO_RAD), radius * sin((circle_deg - deg_span * 0.2) * DEG_TO_RAD), 0));

this->mesh.addVertex(glm::vec3(radius * cos((circle_deg + deg_span * 0.2) * DEG_TO_RAD), radius * sin((circle_deg + deg_span * 0.2) * DEG_TO_RAD), 0));

this->mesh.addVertex(glm::vec3((radius + radius_span) * cos((next_ciecle_deg + deg_span * 0.2) * DEG_TO_RAD), (radius + radius_span) * sin((next_ciecle_deg + deg_span * 0.2) * DEG_TO_RAD), 0));

this->mesh.addVertex(glm::vec3((radius + radius_span) * cos((next_ciecle_deg - deg_span * 0.2) * DEG_TO_RAD), (radius + radius_span) * sin((next_ciecle_deg - deg_span * 0.2) * DEG_TO_RAD), 0));

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

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

ofColor color;

color.setHsb(ofMap((radius + ofGetFrameNum() * 15) % 600, 0, 500, 0, 255), 130, 255);

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

}

for (int deg = deg_span * 0.5; deg < 360 + deg_span; deg += deg_span) {

for (int radius = 30; radius < 600; radius += radius_span) {

float circle_deg = deg + ofMap(radius, 30, 600, 0, 180);

float next_ciecle_deg = deg + ofMap(radius + radius_span, 30, 600, 0, 180);

this->mesh.addVertex(glm::vec3(radius * cos((circle_deg - deg_span * 0.2) * DEG_TO_RAD), radius * sin((circle_deg - deg_span * 0.2) * DEG_TO_RAD), 0));

this->mesh.addVertex(glm::vec3(radius * cos((circle_deg + deg_span * 0.2) * DEG_TO_RAD), radius * sin((circle_deg + deg_span * 0.2) * DEG_TO_RAD), 0));

this->mesh.addVertex(glm::vec3((radius + radius_span) * cos((next_ciecle_deg + deg_span * 0.2) * DEG_TO_RAD), (radius + radius_span) * sin((next_ciecle_deg + deg_span * 0.2) * DEG_TO_RAD), 0));

this->mesh.addVertex(glm::vec3((radius + radius_span) * cos((next_ciecle_deg - deg_span * 0.2) * DEG_TO_RAD), (radius + radius_span) * sin((next_ciecle_deg - deg_span * 0.2) * DEG_TO_RAD), 0));

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

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

ofColor color;

color.setHsb(ofMap(600 - (radius + ofGetFrameNum() * 15) % 500, 0, 500, 0, 255), 130, 255);

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

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

this->mesh.draw();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20221016

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