Torus – ページ 16 – プログラミング de 落描き

2022年1月27日2022年1月27日

Crevice torus. Draw by openFrameworks

[ Video ]

[ About ]
隙間のあるトーラス。

Crevice 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, line;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

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

ofEasyCam cam;

ofMesh face, line;

};

#include "ofApp.h"

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

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

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

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

}

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

	ofSeedRandom(39);

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

	float R = 250;
	float r = R * 0.25;
	float v_step = 0;
	float u_span = 20;
	ofColor color;
	int hue = 0;

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

		auto noise_seed = ofRandom(1000);
		for (float v = 0; v < 360; v += 3) {

			auto noise_value = ofNoise(glm::vec4(noise_seed + ofGetFrameNum() * 0.05, this->make_point(R, r, u, v) * 0.005));

			if (noise_value < 0.45) {

				continue;
			}

			auto prev_noise_value = ofNoise(glm::vec4(noise_seed + ofGetFrameNum() * 0.05, this->make_point(R, r, u, v - 1.5) * 0.005));
			auto next_noise_value = ofNoise(glm::vec4(noise_seed + ofGetFrameNum() * 0.05, this->make_point(R, r, u, v + 1.5) * 0.005));

			vector<glm::vec3> vertices;

			vertices.push_back(glm::vec3(this->make_point(R, r, u - u_span * 0.5 + 1, v - 1.5)));
			vertices.push_back(glm::vec3(this->make_point(R, r, u + u_span * 0.5 - 1, v - 1.5)));
			vertices.push_back(glm::vec3(this->make_point(R, r, u + u_span * 0.5 - 1, v + 1.5)));
			vertices.push_back(glm::vec3(this->make_point(R, r, u - u_span * 0.5 + 1, v + 1.5)));
			

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

			for (int i = 0; i < 4; i++) {
			
				this->face.addColor(ofColor(0));
				this->line.addColor(ofColor(255));
			}
			
			this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 2); this->face.addIndex(this->face.getNumVertices() - 4);
			this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 2); this->face.addIndex(this->face.getNumVertices() - 4);

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

			if (next_noise_value < 0.45) {

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

			if (prev_noise_value < 0.45) {

				this->line.addIndex(this->line.getNumVertices() - 3); this->line.addIndex(this->line.getNumVertices() - 4);
			}
		}
	}
}

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

	this->cam.begin();

	ofRotateY(ofGetFrameNum() * 0.6666666666666666);

	this->line.drawWireframe();
	this->face.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(30);

ofSetWindowTitle("openFrameworks");

ofBackground(255);

ofSetLineWidth(3);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->line.clear();

float R = 250;

float r = R * 0.25;

float v_step = 0;

float u_span = 20;

ofColor color;

int hue = 0;

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

auto noise_seed = ofRandom(1000);

for (float v = 0; v < 360; v += 3) {

auto noise_value = ofNoise(glm::vec4(noise_seed + ofGetFrameNum() * 0.05, this->make_point(R, r, u, v) * 0.005));

if (noise_value < 0.45) {

continue;

}

auto prev_noise_value = ofNoise(glm::vec4(noise_seed + ofGetFrameNum() * 0.05, this->make_point(R, r, u, v - 1.5) * 0.005));

auto next_noise_value = ofNoise(glm::vec4(noise_seed + ofGetFrameNum() * 0.05, this->make_point(R, r, u, v + 1.5) * 0.005));

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(this->make_point(R, r, u - u_span * 0.5 + 1, v - 1.5)));

vertices.push_back(glm::vec3(this->make_point(R, r, u + u_span * 0.5 - 1, v - 1.5)));

vertices.push_back(glm::vec3(this->make_point(R, r, u + u_span * 0.5 - 1, v + 1.5)));

vertices.push_back(glm::vec3(this->make_point(R, r, u - u_span * 0.5 + 1, v + 1.5)));

this->face.addVertices(vertices);

this->line.addVertices(vertices);

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

this->face.addColor(ofColor(0));

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

}

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

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

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

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

if (next_noise_value < 0.45) {

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

}

if (prev_noise_value < 0.45) {

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

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 0.6666666666666666);

this->line.drawWireframe();

this->face.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/Insta20220127

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2022年1月22日

Mille-feuille Torus. Draw by openFrameworks

[ Video ]

[ About ]
ミルフィーユなトーラス。

Mille-feuille 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(255);
	ofSetLineWidth(1);
	ofEnableDepthTest();
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	int v_span = 1;
	int u_span = 30;
	int R = 200;

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

	float noise_seed = ofRandom(1000);
	ofColor color;
	for (int r = 50; r >= 10; r -= 4) {

		color.setHsb(ofMap(r, 50, 10, 0, 128), 130, 255);

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

			bool flag = true;
			int u_start = ofMap(ofNoise(noise_seed, cos(v * DEG_TO_RAD) * 0.5, sin(v * DEG_TO_RAD) * 0.5, ofGetFrameNum() * 0.005), 0, 1, -720, 720);
			int next_u = ofMap(ofNoise(noise_seed, cos((v + v_span) * DEG_TO_RAD) * 0.5, sin((v + v_span) * DEG_TO_RAD) * 0.5, ofGetFrameNum() * 0.005), 0, 1, -720, 720);
			for (int u = u_start; u < u_start + 360; u += u_span) {

				if (flag) {

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

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

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

					color_flag = !color_flag;

					face.addColor(color);
					face.addColor(color);
					face.addColor(color);
					face.addColor(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);
				}

				next_u += u_span;
				flag = !flag;
			}
		}
	}

	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());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(255);

ofSetLineWidth(1);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

int v_span = 1;

int u_span = 30;

int R = 200;

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

float noise_seed = ofRandom(1000);

ofColor color;

for (int r = 50; r >= 10; r -= 4) {

color.setHsb(ofMap(r, 50, 10, 0, 128), 130, 255);

auto color_flag = true;

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

bool flag = true;

int u_start = ofMap(ofNoise(noise_seed, cos(v * DEG_TO_RAD) * 0.5, sin(v * DEG_TO_RAD) * 0.5, ofGetFrameNum() * 0.005), 0, 1, -720, 720);

int next_u = ofMap(ofNoise(noise_seed, cos((v + v_span) * DEG_TO_RAD) * 0.5, sin((v + v_span) * DEG_TO_RAD) * 0.5, ofGetFrameNum() * 0.005), 0, 1, -720, 720);

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

if (flag) {

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));

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

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));

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

ofColor face_color = ofColor(0);

ofColor line_color = ofColor(255);

color_flag = !color_flag;

face.addColor(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);

}

next_u += u_span;

flag = !flag;

}

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/Insta20220122

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2022年1月19日2022年1月19日

Violent torus. Draw by openframeworks

[ video ]

[ About ]
トーラスの座標をねじって遊ぶ。

Play around with twisting the coordinates of the 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 base_face, base_line, draw_face, draw_line;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

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

ofEasyCam cam;

ofMesh base_face, base_line, draw_face, draw_line;

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofEnableDepthTest();
	//ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY);

	this->base_line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
	this->draw_line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

	float phi_deg_step = 2;
	float theta_deg_step = 8;

	float R = 250;
	float r = R * 0.25;

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

		for (float theta_deg = 0; theta_deg < 360; theta_deg += theta_deg_step) {

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

			vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5)));
			vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5)));
			vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5)));
			vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5)));

			this->base_face.addVertices(vertices);
			this->base_line.addVertices(vertices);

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

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

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

	ofSeedRandom(39);

	this->draw_face = this->base_face;
	this->draw_line = this->base_line;

	auto noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));
	for (int i = 0; i < this->draw_face.getNumVertices(); i++) {

		auto vertex = this->draw_face.getVertex(i);

		auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(vertex * 0.003, noise_seed.x + ofGetFrameNum() * 0.02)), 0, 1, -30, 30) * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));
		auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(vertex * 0.003, noise_seed.y + ofGetFrameNum() * 0.02)), 0, 1, -30, 30) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));
		auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(vertex * 0.003, noise_seed.z + ofGetFrameNum() * 0.02)), 0, 1, -30, 30) * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));
			
		vertex = glm::vec4(vertex, 0) * rotation_z * rotation_y * rotation_x;

		this->draw_face.setVertex(i, vertex);
		this->draw_line.setVertex(i, vertex);
	}

}

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

	this->cam.begin();

	ofSetColor(255);
	this->draw_line.draw();

	ofSetColor(0);
	this->draw_face.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(30);

ofSetWindowTitle("openFrameworks");

ofBackground(255);

ofEnableDepthTest();

//ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY);

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

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

float phi_deg_step = 2;

float theta_deg_step = 8;

float R = 250;

float r = R * 0.25;

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

for (float theta_deg = 0; theta_deg < 360; theta_deg += theta_deg_step) {

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

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5)));

vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5)));

vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5)));

vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5)));

this->base_face.addVertices(vertices);

this->base_line.addVertices(vertices);

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

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

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

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

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

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->draw_face = this->base_face;

this->draw_line = this->base_line;

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

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

auto vertex = this->draw_face.getVertex(i);

auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(vertex * 0.003, noise_seed.x + ofGetFrameNum() * 0.02)), 0, 1, -30, 30) * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));

auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(vertex * 0.003, noise_seed.y + ofGetFrameNum() * 0.02)), 0, 1, -30, 30) * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));

auto rotation_z = glm::rotate(glm::mat4(), ofMap(ofNoise(glm::vec4(vertex * 0.003, noise_seed.z + ofGetFrameNum() * 0.02)), 0, 1, -30, 30) * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));

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

this->draw_face.setVertex(i, vertex);

this->draw_line.setVertex(i, vertex);

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(255);

this->draw_line.draw();

ofSetColor(0);

this->draw_face.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/Insta20220119

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