junkiyoshi – ページ 388 – プログラミング de 落描き

2021年3月15日2021年3月15日

Ward Ball. Draw by openFrameworks

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[ About ]
Word Ball.

[ 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) {};

	ofEasyCam cam;
	vector<ofPath> path_list;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

void mouseMoved(int x, int y) {};

void mouseDragged(int x, int y, int button) {};

void mousePressed(int x, int y, int button) {};

void mouseReleased(int x, int y, int button) {};

void mouseEntered(int x, int y) {};

void mouseExited(int x, int y) {};

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofEasyCam cam;

vector<ofPath> path_list;

};

#include "ofApp.h"	

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

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

	ofBackground(239);
	ofSetColor(39);
	ofSetLineWidth(1.5);
	ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER);
	ofEnableDepthTest();

	ofTrueTypeFont font;
	font.loadFont("fonts/Kazesawa-Bold.ttf", 28, true, true, true);

	string word = "CREATIVECODING";
	for (int i = 0; i < (int)word.size(); i++) {

		this->path_list.push_back(font.getCharacterAsPoints(word[i], true, false));
	}
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	ofFill();
	ofSetColor(39);
	ofDrawSphere(glm::vec3(), 180);


	for (int k = 0; k < 50; k++) {

		auto noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0025);
		auto radius = 180.f;

		if (noise_value > 0.88) {

			radius = ofMap(noise_value, 0.88, 1, 180, 650);
		}

		ofRotateX(ofMap(ofNoise(ofRandom(10000), ofGetFrameNum() * 0.002), 0, 1, 0, 360));
		ofRotateZ(ofMap(ofNoise(ofRandom(10000), ofGetFrameNum() * 0.002), 0, 1, 0, 360));
		for (int deg = 0; deg < 360; deg += 5) {

			auto location = glm::vec3(0, 0, -radius);
			auto rotation_y = glm::rotate(glm::mat4(), (float)(deg * DEG_TO_RAD), glm::vec3(0, 1, 0));
			location = glm::vec4(location, 0) * rotation_y;

			ofPushMatrix();
			ofTranslate(location);
			ofRotateY(180 - deg);
			ofRotateX(180);

			int noise_index = ofMap(ofNoise(location.x * 0.008, location.y * 0.008, location.z * 0.008, ofGetFrameNum() * 0.005), 0, 1, 0, path_list.size());
			int tmp_size = (2 * radius * PI) / 72;
			auto outline = path_list[noise_index].getOutline();

			ofSetColor(239);
			ofFill();
			ofBeginShape();
			for (int line_index = 0; line_index < outline.size(); line_index++) {

				if (line_index != 0) { ofNextContour(true); }

				auto vertices = outline[line_index].getVertices();
				for (int i = 0; i < vertices.size(); i++) {

					ofVertex((vertices[i] / 28 * tmp_size) + glm::vec2(tmp_size * -0.5, tmp_size * 0.5));
				}
			}
			ofEndShape(true);

			ofSetColor(39);
			ofNoFill();
			ofBeginShape();
			for (int line_index = 0; line_index < outline.size(); line_index++) {

				if (line_index != 0) { ofNextContour(true); }

				auto vertices = outline[line_index].getVertices();
				for (int i = 0; i < vertices.size(); i++) {

					ofVertex((vertices[i] / 28 * tmp_size) + glm::vec2(tmp_size * -0.5, tmp_size * 0.5));
				}
			}
			ofEndShape(true);

			ofPopMatrix();
		}
	}

	this->cam.end();
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(39);

ofSetLineWidth(1.5);

ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER);

ofEnableDepthTest();

ofTrueTypeFont font;

font.loadFont("fonts/Kazesawa-Bold.ttf", 28, true, true, true);

string word = "CREATIVECODING";

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

this->path_list.push_back(font.getCharacterAsPoints(word[i], true, false));

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

ofFill();

ofSetColor(39);

ofDrawSphere(glm::vec3(), 180);

for (int k = 0; k < 50; k++) {

auto noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0025);

auto radius = 180.f;

if (noise_value > 0.88) {

radius = ofMap(noise_value, 0.88, 1, 180, 650);

}

ofRotateX(ofMap(ofNoise(ofRandom(10000), ofGetFrameNum() * 0.002), 0, 1, 0, 360));

ofRotateZ(ofMap(ofNoise(ofRandom(10000), ofGetFrameNum() * 0.002), 0, 1, 0, 360));

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

auto location = glm::vec3(0, 0, -radius);

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

location = glm::vec4(location, 0) * rotation_y;

ofPushMatrix();

ofTranslate(location);

ofRotateY(180 - deg);

ofRotateX(180);

int noise_index = ofMap(ofNoise(location.x * 0.008, location.y * 0.008, location.z * 0.008, ofGetFrameNum() * 0.005), 0, 1, 0, path_list.size());

int tmp_size = (2 * radius * PI) / 72;

auto outline = path_list[noise_index].getOutline();

ofSetColor(239);

ofFill();

ofBeginShape();

for (int line_index = 0; line_index < outline.size(); line_index++) {

if (line_index != 0) { ofNextContour(true); }

auto vertices = outline[line_index].getVertices();

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

ofVertex((vertices[i] / 28 * tmp_size) + glm::vec2(tmp_size * -0.5, tmp_size * 0.5));

}

ofEndShape(true);

ofSetColor(39);

ofNoFill();

ofBeginShape();

for (int line_index = 0; line_index < outline.size(); line_index++) {

if (line_index != 0) { ofNextContour(true); }

auto vertices = outline[line_index].getVertices();

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

ofVertex((vertices[i] / 28 * tmp_size) + glm::vec2(tmp_size * -0.5, tmp_size * 0.5));

}

ofEndShape(true);

ofPopMatrix();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210315

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2021年3月14日

Layered sphere. Draw by openFrameworks

[ Video ]

[ About ]
Layered sphere.

[ 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 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) {};

ofEasyCam cam;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();

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

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

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

	float phi_deg_step = 8;
	float theta_deg_step = 8;
	float noise_param = 0.5;
	float threshold = 0.55;

	ofColor color;
	vector<int> hex_list = { 0xef476f, 0xffd166, 0x06d6a0, 0x118ab2, 0x073b4c };
	vector<ofColor> color_list;
	for (auto hex : hex_list) {

		color.setHex(hex);
		color_list.push_back(color);
	}
	int color_index = 0;

	for (float radius = 100; radius <= 200; radius += 25) {

		for (float phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) {

			for (float theta_deg = theta_deg_step; theta_deg < 180; theta_deg += theta_deg_step) {

				auto noise_value = ofNoise(cos(phi_deg * DEG_TO_RAD) * noise_param, sin(phi_deg * DEG_TO_RAD) * noise_param, cos(theta_deg * DEG_TO_RAD) * noise_param, (ofGetFrameNum() + radius) * 0.015);
				if (noise_value < threshold) { continue; }

				auto noise_1 = ofNoise(cos(phi_deg * DEG_TO_RAD) * noise_param, sin(phi_deg * DEG_TO_RAD) * noise_param, cos((theta_deg - theta_deg_step) * DEG_TO_RAD) * noise_param, (ofGetFrameNum() + radius) * 0.015);
				auto noise_2 = ofNoise(cos((phi_deg + phi_deg_step) * DEG_TO_RAD) * noise_param, sin((phi_deg + phi_deg_step) * DEG_TO_RAD) * noise_param, cos(theta_deg * DEG_TO_RAD) * noise_param, (ofGetFrameNum() + radius) * 0.015);
				auto noise_3 = ofNoise(cos((phi_deg - phi_deg_step) * DEG_TO_RAD) * noise_param, sin((phi_deg - phi_deg_step) * DEG_TO_RAD) * noise_param, cos(theta_deg * DEG_TO_RAD) * noise_param, (ofGetFrameNum() + radius) * 0.015);
				auto noise_4 = ofNoise(cos(phi_deg * DEG_TO_RAD) * noise_param, sin(phi_deg * DEG_TO_RAD) * noise_param, cos((theta_deg + theta_deg_step) * DEG_TO_RAD) * noise_param, (ofGetFrameNum() + radius) * 0.015);

				auto index = this->face.getNumVertices();
				vector<glm::vec3> vertices;

				vertices.push_back(glm::vec3(
					radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
					radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
					radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));
				vertices.push_back(glm::vec3(
					radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
					radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
					radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));
				vertices.push_back(glm::vec3(
					radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
					radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
					radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD)));
				vertices.push_back(glm::vec3(
					radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
					radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
					radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD)));

				this->face.addVertices(vertices);

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

				for (int k = 0; k < 4; k++) {

					this->face.addColor(ofColor(color_list[color_index], 192));
					this->frame.addColor(ofColor(39));
				}

				if (noise_1 < threshold) {

					this->frame.addVertex(vertices[0]);
					this->frame.addVertex(vertices[1]);

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

				if (noise_2 < threshold) {

					this->frame.addVertex(vertices[0]);
					this->frame.addVertex(vertices[2]);

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

				if (noise_3 < threshold) {

					this->frame.addVertex(vertices[1]);
					this->frame.addVertex(vertices[3]);

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

				if (noise_4 < threshold) {

					this->frame.addVertex(vertices[2]);
					this->frame.addVertex(vertices[3]);

					this->frame.addIndex(this->frame.getNumVertices() - 1);
					this->frame.addIndex(this->frame.getNumVertices() - 2);

				}
			}
		}

		color_index = (color_index + 1) % color_list.size();
	}
}

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

	this->cam.begin();
	ofRotateX(ofGetFrameNum() * 0.37);
	ofRotateY(ofGetFrameNum() * 0.72);

	this->frame.draw();
	this->face.draw();

	this->cam.end();
}

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

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

}

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

void ofApp::update() {

this->face.clear();

this->frame.clear();

float phi_deg_step = 8;

float theta_deg_step = 8;

float noise_param = 0.5;

float threshold = 0.55;

ofColor color;

vector<int> hex_list = { 0xef476f, 0xffd166, 0x06d6a0, 0x118ab2, 0x073b4c };

vector<ofColor> color_list;

for (auto hex : hex_list) {

color.setHex(hex);

color_list.push_back(color);

}

int color_index = 0;

for (float radius = 100; radius <= 200; radius += 25) {

for (float phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) {

for (float theta_deg = theta_deg_step; theta_deg < 180; theta_deg += theta_deg_step) {

auto noise_value = ofNoise(cos(phi_deg * DEG_TO_RAD) * noise_param, sin(phi_deg * DEG_TO_RAD) * noise_param, cos(theta_deg * DEG_TO_RAD) * noise_param, (ofGetFrameNum() + radius) * 0.015);

if (noise_value < threshold) { continue; }

auto noise_1 = ofNoise(cos(phi_deg * DEG_TO_RAD) * noise_param, sin(phi_deg * DEG_TO_RAD) * noise_param, cos((theta_deg - theta_deg_step) * DEG_TO_RAD) * noise_param, (ofGetFrameNum() + radius) * 0.015);

auto noise_2 = ofNoise(cos((phi_deg + phi_deg_step) * DEG_TO_RAD) * noise_param, sin((phi_deg + phi_deg_step) * DEG_TO_RAD) * noise_param, cos(theta_deg * DEG_TO_RAD) * noise_param, (ofGetFrameNum() + radius) * 0.015);

auto noise_3 = ofNoise(cos((phi_deg - phi_deg_step) * DEG_TO_RAD) * noise_param, sin((phi_deg - phi_deg_step) * DEG_TO_RAD) * noise_param, cos(theta_deg * DEG_TO_RAD) * noise_param, (ofGetFrameNum() + radius) * 0.015);

auto noise_4 = ofNoise(cos(phi_deg * DEG_TO_RAD) * noise_param, sin(phi_deg * DEG_TO_RAD) * noise_param, cos((theta_deg + theta_deg_step) * DEG_TO_RAD) * noise_param, (ofGetFrameNum() + radius) * 0.015);

auto index = this->face.getNumVertices();

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(

radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(

radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(

radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(

radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD)));

this->face.addVertices(vertices);

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

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

for (int k = 0; k < 4; k++) {

this->face.addColor(ofColor(color_list[color_index], 192));

this->frame.addColor(ofColor(39));

}

if (noise_1 < threshold) {

this->frame.addVertex(vertices[0]);

this->frame.addVertex(vertices[1]);

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

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

}

if (noise_2 < threshold) {

this->frame.addVertex(vertices[0]);

this->frame.addVertex(vertices[2]);

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

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

}

if (noise_3 < threshold) {

this->frame.addVertex(vertices[1]);

this->frame.addVertex(vertices[3]);

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

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

}

if (noise_4 < threshold) {

this->frame.addVertex(vertices[2]);

this->frame.addVertex(vertices[3]);

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

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

}

color_index = (color_index + 1) % color_list.size();

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(ofGetFrameNum() * 0.37);

ofRotateY(ofGetFrameNum() * 0.72);

this->frame.draw();

this->face.draw();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210314

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2021年3月13日2021年3月13日

Run torus. Draw by openFrameworks

[ Video ]

[ About ]
Run 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(1.5);
	ofEnableDepthTest();

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

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

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

	auto R = 250.f;
	auto r = 100.f;
	auto u_step = 8.f;
	auto v_step = 2.f;

	auto v_start = 0.f;
	auto v_len = 80.f;

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

		for (auto r = 10; r <= 80; r += 5) {

			v_start = (ofGetFrameNum() +  r) % 360 + i * 180;
			auto start_index = this->frame.getNumVertices();

			for (auto v = v_start; v < v_start + v_len; v += v_step) {

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

				auto index = this->face.getNumVertices();

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

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

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

				for (int k = 0; k < 4; k++) {

					i == 0 ? this->face.addColor(ofColor(39)) : this->face.addColor(ofColor(239));
					i == 0 ? this->frame.addColor(ofColor(239)) : this->frame.addColor(ofColor(39));
				}
			}

			this->frame.addIndex(start_index + 1); this->frame.addIndex(start_index + 3);
			this->frame.addIndex(this->frame.getNumVertices() - 3); this->frame.addIndex(this->frame.getNumVertices() - 2);
		}
	}
}


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

	this->cam.begin();

	this->face.draw();
	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());
}

100

101

102

103

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetLineWidth(1.5);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

this->face.clear();

this->frame.clear();

auto R = 250.f;

auto r = 100.f;

auto u_step = 8.f;

auto v_step = 2.f;

auto v_start = 0.f;

auto v_len = 80.f;

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

for (auto r = 10; r <= 80; r += 5) {

v_start = (ofGetFrameNum() + r) % 360 + i * 180;

auto start_index = this->frame.getNumVertices();

for (auto v = v_start; v < v_start + v_len; v += v_step) {

vector<glm::vec3> vertices{

glm::vec3(this->make_point(R, r, v * u_step, v)),

glm::vec3(this->make_point(R, r, (v + v_step) * u_step, v + v_step)),

glm::vec3(this->make_point(R, r, v * u_step, v + v_step)),

glm::vec3(this->make_point(R, r, (v - v_step) * u_step, v))

};

auto index = this->face.getNumVertices();

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

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

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

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

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

for (int k = 0; k < 4; k++) {

i == 0 ? this->face.addColor(ofColor(39)) : this->face.addColor(ofColor(239));

i == 0 ? this->frame.addColor(ofColor(239)) : this->frame.addColor(ofColor(39));

}

this->frame.addIndex(start_index + 1); this->frame.addIndex(start_index + 3);

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

}

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

void ofApp::draw() {

this->cam.begin();

this->face.draw();

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/Insta20210313

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