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2021年5月25日2021年5月25日

hex rotationg. Draw by openFrameworks

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[ About ]
hex rotationg.

[ 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) {};

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

	ofEasyCam cam;
	ofMesh face, line;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

void 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) {};

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

ofEasyCam cam;

ofMesh face, line;

};

#include "ofApp.h"

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

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

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

	this->line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
}
//--------------------------------------------------------------
void ofApp::update() {

	ofSeedRandom(39);

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

	for (int z = -2500; z <= 350; z += 50) {

		this->setHexToMesh(this->face, this->line, glm::vec3(0, 0, z), 300, 3, 50);
	}
}

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

	this->cam.begin();

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

	ofSetColor(200, 39, 39);
	this->line.drawWireframe();

	this->cam.end();
}

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

	int index = face_target.getNumVertices();
	int deg_start = ofMap(ofNoise(location.z * 0.0005 + ofGetFrameNum() * 0.008), 0, 1, 0, 360 * 2);
	int deg_end = deg_start + 360;
	int deg_span = 60;

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

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

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

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

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

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->line.clear();

for (int z = -2500; z <= 350; z += 50) {

this->setHexToMesh(this->face, this->line, glm::vec3(0, 0, z), 300, 3, 50);

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(39);

this->face.draw();

ofSetColor(200, 39, 39);

this->line.drawWireframe();

this->cam.end();

}

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

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

int index = face_target.getNumVertices();

int deg_start = ofMap(ofNoise(location.z * 0.0005 + ofGetFrameNum() * 0.008), 0, 1, 0, 360 * 2);

int deg_end = deg_start + 360;

int deg_span = 60;

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

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));

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

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

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));

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));

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

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

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));

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

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

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

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

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

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

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210525

[ほしいものリスト]
Amazon

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2020年8月30日2020年8月30日

Random hexagon walker. Draw by openFrameworks

[ Video ]

[ About ]
ランダム・ヘキサゴン・ウォーカー。

Random hexagon walker.

[ 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) {};

	float radius;
	vector<vector<glm::vec2>> hexagon_list;
	vector<ofColor> base_color_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) {};

float radius;

vector<vector<glm::vec2>> hexagon_list;

vector<ofColor> base_color_list;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY);

	this->radius = 15;
	vector<glm::vec2> start_location_list;
	auto x_span = this->radius * sqrt(3);
	auto flg = true;
	for (float y = 0; y < ofGetHeight() + this->radius; y += this->radius * 1.5) {

		for (float x = 0; x < ofGetWidth() + this->radius; x += x_span) {

			glm::vec2 location;
			if (flg) {

				location = glm::vec2(x, y);
			}
			else {

				location = glm::vec2(x + (this->radius * sqrt(3) / 2), y);
			}

			start_location_list.push_back(location);
		}
		flg = !flg;
	}

	for (int i = 0; i < 20; i++) {

		int r = ofRandom(start_location_list.size());

		auto log_list = vector<glm::vec2>();
		log_list.push_back(start_location_list[r]);
		this->hexagon_list.push_back(log_list);
	}

	ofColor color;
	vector<int> hex_list = { 0xee6352, 0x59cd90, 0x3fa7d6, 0xfac05e, 0xf79d84 };
	for (auto hex : hex_list) {

		color.setHex(hex);
		this->base_color_list.push_back(color);
	}
}

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

	auto span = this->radius * sqrt(3);
	for (auto& log_list : this->hexagon_list) {

		int r = ofRandom(6);
		int deg_start = r * 60;
		for (int deg = deg_start; deg < deg_start + 360; deg += 60) {

			auto tmp_location = log_list.back() + glm::vec2(span * cos(deg * DEG_TO_RAD), span * sin(deg * DEG_TO_RAD));
			if (tmp_location.x < 0 || tmp_location.x > ofGetWidth() + this->radius || tmp_location.y < 0 || tmp_location.y > ofGetHeight() + this->radius) {

				continue;
			}

			log_list.push_back(tmp_location);
			break;
		}

		while (log_list.size() > 20) {

			log_list.erase(log_list.begin());
		}
	}
}

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

	int color_index = 0;
	for (auto& log_list : this->hexagon_list) {

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

			vector<glm::vec2> vertices;
			for (auto deg = 90; deg < 450; deg += 60) {

				vertices.push_back(log_list[i] + glm::vec2(this->radius * cos(deg * DEG_TO_RAD), this->radius * sin(deg * DEG_TO_RAD)));
			}

			ofFill();
			ofSetColor(this->base_color_list[color_index % this->base_color_list.size()]);
			ofBeginShape();
			ofVertices(vertices);
			ofEndShape(true);

			ofNoFill();
			ofSetColor(239);
			ofBeginShape();
			ofVertices(vertices);
			ofEndShape(true);
		}

		color_index++;
	}
}

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

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY);

this->radius = 15;

vector<glm::vec2> start_location_list;

auto x_span = this->radius * sqrt(3);

auto flg = true;

for (float y = 0; y < ofGetHeight() + this->radius; y += this->radius * 1.5) {

for (float x = 0; x < ofGetWidth() + this->radius; x += x_span) {

glm::vec2 location;

if (flg) {

location = glm::vec2(x, y);

}

else {

location = glm::vec2(x + (this->radius * sqrt(3) / 2), y);

}

start_location_list.push_back(location);

}

flg = !flg;

}

for (int i = 0; i < 20; i++) {

int r = ofRandom(start_location_list.size());

auto log_list = vector<glm::vec2>();

log_list.push_back(start_location_list[r]);

this->hexagon_list.push_back(log_list);

}

ofColor color;

vector<int> hex_list = { 0xee6352, 0x59cd90, 0x3fa7d6, 0xfac05e, 0xf79d84 };

for (auto hex : hex_list) {

color.setHex(hex);

this->base_color_list.push_back(color);

}

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

void ofApp::update() {

auto span = this->radius * sqrt(3);

for (auto& log_list : this->hexagon_list) {

int r = ofRandom(6);

int deg_start = r * 60;

for (int deg = deg_start; deg < deg_start + 360; deg += 60) {

auto tmp_location = log_list.back() + glm::vec2(span * cos(deg * DEG_TO_RAD), span * sin(deg * DEG_TO_RAD));

if (tmp_location.x < 0 || tmp_location.x > ofGetWidth() + this->radius || tmp_location.y < 0 || tmp_location.y > ofGetHeight() + this->radius) {

continue;

}

log_list.push_back(tmp_location);

break;

}

while (log_list.size() > 20) {

log_list.erase(log_list.begin());

}

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

void ofApp::draw() {

int color_index = 0;

for (auto& log_list : this->hexagon_list) {

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

vector<glm::vec2> vertices;

for (auto deg = 90; deg < 450; deg += 60) {

vertices.push_back(log_list[i] + glm::vec2(this->radius * cos(deg * DEG_TO_RAD), this->radius * sin(deg * DEG_TO_RAD)));

}

ofFill();

ofSetColor(this->base_color_list[color_index % this->base_color_list.size()]);

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

ofNoFill();

ofSetColor(239);

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

}

color_index++;

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200830

[ほしいものリスト]
Amazon

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2020年3月28日

Hexagonal torus. openFrameworks

[ Video ]

[ About ]
六角形を円に配置してそれぞれ回す。

Arrange the hexagons in a circle and turn each one.

[ 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_mesh, frame_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) {};

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

ofEasyCam cam;

ofMesh face_mesh, frame_mesh;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(1.5);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

	this->face_mesh.clear();
	this->frame_mesh.clear();

	auto R = 200;
	auto r = 65;
	auto v_span = 5;
	auto u_span = 60;
	for (auto v = 0; v < 360; v += v_span) {

		auto u_start = ofMap(ofNoise(cos(v * DEG_TO_RAD) * 0.5, sin(v * DEG_TO_RAD) * 0.5, ofGetFrameNum() * 0.005), 0, 1, -180, 180);
		for (auto u = u_start; u < u_start + 360; u += u_span) {

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

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

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

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

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

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

	ofSetColor(39);
	this->face_mesh.drawFaces();

	ofSetColor(239);
	this->frame_mesh.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());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetLineWidth(1.5);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face_mesh.clear();

this->frame_mesh.clear();

auto R = 200;

auto r = 65;

auto v_span = 5;

auto u_span = 60;

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

auto u_start = ofMap(ofNoise(cos(v * DEG_TO_RAD) * 0.5, sin(v * DEG_TO_RAD) * 0.5, ofGetFrameNum() * 0.005), 0, 1, -180, 180);

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

vector<glm::vec3> vertices;

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

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

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

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

int index = this->face_mesh.getNumVertices();

this->face_mesh.addVertices(vertices);

this->frame_mesh.addVertices(vertices);

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

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

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

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

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

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

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(300);

ofSetColor(39);

this->face_mesh.drawFaces();

ofSetColor(239);

this->frame_mesh.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/Insta20200328

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