Torus – ページ 27 – プログラミング de 落描き

2020年7月24日

Crumbling torus. Draw by openFrameworks

[ video ]

[ About ]
崩れるトーラス。

crumbling 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 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 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) {};

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

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 R = 100;
	int u = 0;
	int u_step = 10;
	int v_step = 5;

	for (int i = 0; i < 36; i++) {

		float angle_z = (i * 5) * DEG_TO_RAD;
		auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

		auto noise_value = ofNoise(glm::vec3(cos(angle_z), sin(angle_z), ofGetFrameNum() * 0.01));
		int r = 15;
		if (noise_value > 0.55) {

			r = ofMap(noise_value, 0.55, 1, 15, 35);
		}

		for (auto v = 0; v < 360; v += v_step) {

			vector<glm::vec3> vertices{
				glm::vec4(this->make_point(R, r, u, v), 0) * rotation_z,
				glm::vec4(this->make_point(R, r, u + u_step, v + v_step), 0) * rotation_z,
				glm::vec4(this->make_point(R, r, u, v + v_step), 0) * rotation_z,
				glm::vec4(this->make_point(R, r, u - u_step, v), 0) * rotation_z
			};

			this->face.addVertices(vertices);
			this->frame.addVertices(vertices);

			auto index = this->face.getVertices().size() - 1;

			this->face.addIndex(index - 3); this->face.addIndex(index - 2); this->face.addIndex(index - 1);
			this->face.addIndex(index); this->face.addIndex(index - 3); this->face.addIndex(index - 1);

			this->frame.addIndex(index - 3); this->frame.addIndex(index - 2);
			this->frame.addIndex(index); this->frame.addIndex(index - 1);

			u += u_step;
		}
	}
}

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

	this->cam.begin();

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

	ofSetColor(39);
	this->frame.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"

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

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 R = 100;

int u = 0;

int u_step = 10;

int v_step = 5;

for (int i = 0; i < 36; i++) {

float angle_z = (i * 5) * DEG_TO_RAD;

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

auto noise_value = ofNoise(glm::vec3(cos(angle_z), sin(angle_z), ofGetFrameNum() * 0.01));

int r = 15;

if (noise_value > 0.55) {

r = ofMap(noise_value, 0.55, 1, 15, 35);

}

for (auto v = 0; v < 360; v += v_step) {

vector<glm::vec3> vertices{

glm::vec4(this->make_point(R, r, u, v), 0) * rotation_z,

glm::vec4(this->make_point(R, r, u + u_step, v + v_step), 0) * rotation_z,

glm::vec4(this->make_point(R, r, u, v + v_step), 0) * rotation_z,

glm::vec4(this->make_point(R, r, u - u_step, v), 0) * rotation_z

};

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

auto index = this->face.getVertices().size() - 1;

this->face.addIndex(index - 3); this->face.addIndex(index - 2); this->face.addIndex(index - 1);

this->face.addIndex(index); this->face.addIndex(index - 3); this->face.addIndex(index - 1);

this->frame.addIndex(index - 3); this->frame.addIndex(index - 2);

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

u += u_step;

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(239);

this->face.draw();

ofSetColor(39);

this->frame.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/Insta20200724

2020年4月27日

Velocity visualization of moving torus coordinates. openFrameworks

[ Video ]

[ About ]
Velocity visualization of moving torus coordinates.

[ 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;

	int number_of_obj;
	vector<glm::vec3> location_list;
	vector<glm::vec3> velocity_list;
	vector<float> life_list;

	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) {};

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

ofEasyCam cam;

int number_of_obj;

vector<glm::vec3> location_list;

vector<glm::vec3> velocity_list;

vector<float> life_list;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();

	float R = 120;
	float r = 13;	
	int v_span = 8;
	int u_span = 10;

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

		for (auto u = 0; u < 360; u += u_span) {

			vector<glm::vec3> vertices;
			vertices.push_back(this->make_point(R, r, u, v - v_span * 0.5));
			vertices.push_back(this->make_point(R, r, u + u_span, v - v_span * 0.5));
			vertices.push_back(this->make_point(R, r, u + u_span, v + v_span * 0.5));
			vertices.push_back(this->make_point(R, r, u, v + v_span * 0.5));

			int index = face.getNumVertices();
			this->face.addVertices(vertices);

			this->face.addIndex(index + 0); face.addIndex(index + 1); face.addIndex(index + 2);
			this->face.addIndex(index + 0); face.addIndex(index + 2); face.addIndex(index + 3);

		}
	}

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

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

	float R = 120;
	float r = 15;
	for (int deg = 0; deg < 360; deg += 30) {

		float v = ofGetFrameNum() * 0.25 + deg;
		float u = (ofGetFrameNum() + deg * 2) * 10;
		float next_v = (ofGetFrameNum() + 1) * 0.25 + deg;
		float next_u = (ofGetFrameNum() + 1 + deg * 2) * 10;

		auto location = this->make_point(R, r, u, v);
		auto next = this->make_point(R, r, next_u, next_v);
		auto distance = location - next;
		
		auto future = glm::vec3(location) + distance * 80;
		auto random_deg_1 = ofRandom(360);
		auto random_deg_2 = ofRandom(360);
		future += glm::vec3(
			30 * cos(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),
			30 * sin(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),
			30 * cos(random_deg_2 * DEG_TO_RAD)
		);
		auto future_distance = future - location;
		
		this->frame.addVertex(location);
		this->velocity_list.push_back(glm::normalize(future_distance) * glm::length(distance));
		this->life_list.push_back(100);
	}

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

		this->frame.setVertex(i, this->frame.getVertex(i) + this->velocity_list[i]);
		this->life_list[i] += -3;
	}

	for (int i = this->velocity_list.size() - 1; i >= 0; i--) {

		if(this->life_list[i] < 0) {

			this->life_list.erase(this->life_list.begin() + i);
			this->velocity_list.erase(this->velocity_list.begin() + i);
			this->frame.removeVertex(i);
		}
	}

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

		this->frame.addColor(ofColor(39, ofMap(this->life_list[i], 0, 100, 0, 255)));
		for (int k = i + 1; k < this->frame.getNumVertices(); k += 1) {

			if (glm::distance(this->frame.getVertex(i), this->frame.getVertex(k)) < 15) {

				this->frame.addIndex(i); this->frame.addIndex(k);
			}
		}
	}
}

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

	this->cam.begin();
	ofRotateX(290);

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

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

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

		ofSetColor(ofColor(39, ofMap(this->life_list[i], 0, 100, 0, 255)));
		ofDrawSphere(this->frame.getVertex(i), 1);
	}

	this->frame.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());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofEnableDepthTest();

float R = 120;

float r = 13;

int v_span = 8;

int u_span = 10;

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

for (auto u = 0; u < 360; u += u_span) {

vector<glm::vec3> vertices;

vertices.push_back(this->make_point(R, r, u, v - v_span * 0.5));

vertices.push_back(this->make_point(R, r, u + u_span, v - v_span * 0.5));

vertices.push_back(this->make_point(R, r, u + u_span, v + v_span * 0.5));

vertices.push_back(this->make_point(R, r, u, v + v_span * 0.5));

int index = face.getNumVertices();

this->face.addVertices(vertices);

this->face.addIndex(index + 0); face.addIndex(index + 1); face.addIndex(index + 2);

this->face.addIndex(index + 0); face.addIndex(index + 2); face.addIndex(index + 3);

}

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

}

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

void ofApp::update() {

float R = 120;

float r = 15;

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

float v = ofGetFrameNum() * 0.25 + deg;

float u = (ofGetFrameNum() + deg * 2) * 10;

float next_v = (ofGetFrameNum() + 1) * 0.25 + deg;

float next_u = (ofGetFrameNum() + 1 + deg * 2) * 10;

auto location = this->make_point(R, r, u, v);

auto next = this->make_point(R, r, next_u, next_v);

auto distance = location - next;

auto future = glm::vec3(location) + distance * 80;

auto random_deg_1 = ofRandom(360);

auto random_deg_2 = ofRandom(360);

future += glm::vec3(

30 * cos(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),

30 * sin(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),

30 * cos(random_deg_2 * DEG_TO_RAD)

);

auto future_distance = future - location;

this->frame.addVertex(location);

this->velocity_list.push_back(glm::normalize(future_distance) * glm::length(distance));

this->life_list.push_back(100);

}

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

this->frame.setVertex(i, this->frame.getVertex(i) + this->velocity_list[i]);

this->life_list[i] += -3;

}

for (int i = this->velocity_list.size() - 1; i >= 0; i--) {

if(this->life_list[i] < 0) {

this->life_list.erase(this->life_list.begin() + i);

this->velocity_list.erase(this->velocity_list.begin() + i);

this->frame.removeVertex(i);

}

this->frame.clearIndices();

this->frame.clearColors();

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

this->frame.addColor(ofColor(39, ofMap(this->life_list[i], 0, 100, 0, 255)));

for (int k = i + 1; k < this->frame.getNumVertices(); k += 1) {

if (glm::distance(this->frame.getVertex(i), this->frame.getVertex(k)) < 15) {

this->frame.addIndex(i); this->frame.addIndex(k);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(290);

ofSetColor(239);

this->face.draw();

ofSetColor(39);

this->face.drawWireframe();

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

ofSetColor(ofColor(39, ofMap(this->life_list[i], 0, 100, 0, 255)));

ofDrawSphere(this->frame.getVertex(i), 1);

}

this->frame.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/Insta20200427

2020年4月13日

Ring of Torus. openFrameworks

[ Video ]

[ About ]
Ring 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 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(60);
	ofSetWindowTitle("openframeworks");

	ofBackground(239);
	ofEnableDepthTest();
}

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

	ofSeedRandom(39);
}

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

	auto R = 200;
	auto r = 35;
	auto v_span = 8;
	auto u_span = 10;
	auto v = 0;

	this->cam.begin();
	ofRotateX(300);

	ofColor color;
	for (auto deg = 0; deg < 360; deg += v_span) {

		color.setHsb(ofMap(deg, 0, 360, 0, 255), 255, 255);

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

		for (auto u = 0; u < 360; u += u_span) {

			vector<glm::vec3> vertices;
			vertices.push_back(this->make_point(R, r, u, v - v_span * 0.5));
			vertices.push_back(this->make_point(R, r, u + u_span, v - v_span * 0.5));
			vertices.push_back(this->make_point(R, r, u + u_span, v + v_span * 0.5));
			vertices.push_back(this->make_point(R, r, u, v + v_span * 0.5));

			int index = face.getNumVertices();
			face.addVertices(vertices);
			frame.addVertices(vertices);

			face.addIndex(index + 0); face.addIndex(index + 1); face.addIndex(index + 2);
			face.addIndex(index + 0); face.addIndex(index + 2); face.addIndex(index + 3);

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

		ofPushMatrix();
		ofRotateZ(deg);

		int n = 360 / v_span;
		int frame_number = ofGetFrameNum() * 8;
		int param = frame_number % (360 * n) - (v_span * n * 0.5);
		if (deg * n >= param && deg * n < param + v_span * n){
		
			ofRotateY(frame_number);
		}
		else {

			param = (frame_number + 180 * n) % (360 * n) - (v_span * n * 0.5);
			if (deg * n >= param && deg * n < param + v_span * n) {

				ofRotateY(frame_number * -1);
			}
		}

		ofSetColor(239);
		face.drawFaces();

		ofSetColor(39);
		frame.drawWireframe();

		ofPopMatrix();
	}

	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(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

auto R = 200;

auto r = 35;

auto v_span = 8;

auto u_span = 10;

auto v = 0;

this->cam.begin();

ofRotateX(300);

ofColor color;

for (auto deg = 0; deg < 360; deg += v_span) {

color.setHsb(ofMap(deg, 0, 360, 0, 255), 255, 255);

ofMesh face, frame;

frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

for (auto u = 0; u < 360; u += u_span) {

vector<glm::vec3> vertices;

vertices.push_back(this->make_point(R, r, u, v - v_span * 0.5));

vertices.push_back(this->make_point(R, r, u + u_span, v - v_span * 0.5));

vertices.push_back(this->make_point(R, r, u + u_span, v + v_span * 0.5));

vertices.push_back(this->make_point(R, r, u, v + v_span * 0.5));

int index = face.getNumVertices();

face.addVertices(vertices);

frame.addVertices(vertices);

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

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

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

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

frame.addIndex(index + 2); frame.addIndex(index + 3);

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

}

ofPushMatrix();

ofRotateZ(deg);

int n = 360 / v_span;

int frame_number = ofGetFrameNum() * 8;

int param = frame_number % (360 * n) - (v_span * n * 0.5);

if (deg * n >= param && deg * n < param + v_span * n){

ofRotateY(frame_number);

}

else {

param = (frame_number + 180 * n) % (360 * n) - (v_span * n * 0.5);

if (deg * n >= param && deg * n < param + v_span * n) {

ofRotateY(frame_number * -1);

}

ofSetColor(239);

face.drawFaces();

ofSetColor(39);

frame.drawWireframe();

ofPopMatrix();

}

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/Insta20200413

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