ofMesh – ページ 62 – プログラミング de 落描き

2022年6月5日

Disjointed torus. Draw by openFrameworks

[ Video ]

[ About ]
バラバラなトーラス。

Disjointed 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(0);
	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 u_span = 15;
	float threshold = 0.55;

	for (float r = 40; r < 90; r += 10) {

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

			for (float v = 0; v < 360; v += 1.5) {

				auto noise_value = ofNoise(glm::vec4(this->make_point(R, r * 10, u, v) * 0.0015, ofGetFrameNum() * 0.008));

				if (noise_value < threshold) {

					continue;
				}

				auto prev_noise_value = ofNoise(glm::vec4(this->make_point(R, r * 10, u, v - 1.5) * 0.0015, ofGetFrameNum() * 0.008));
				auto next_noise_value = ofNoise(glm::vec4(this->make_point(R, r * 10, u, v + 1.5) * 0.0015, ofGetFrameNum() * 0.008));

				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)));

				vertices.push_back(glm::vec3(this->make_point(R, r - 9, u - u_span * 0.5 + 1, v - 1.5)));
				vertices.push_back(glm::vec3(this->make_point(R, r - 9, u + u_span * 0.5 - 1, v - 1.5)));
				vertices.push_back(glm::vec3(this->make_point(R, r - 9, u + u_span * 0.5 - 1, v + 1.5)));
				vertices.push_back(glm::vec3(this->make_point(R, r - 9, u - u_span * 0.5 + 1, v + 1.5)));

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

				for (int i = 0; i < vertices.size(); 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->face.addIndex(this->face.getNumVertices() - 5); this->face.addIndex(this->face.getNumVertices() - 6); this->face.addIndex(this->face.getNumVertices() - 8);
				this->face.addIndex(this->face.getNumVertices() - 7); this->face.addIndex(this->face.getNumVertices() - 6); this->face.addIndex(this->face.getNumVertices() - 8);

				this->face.addIndex(this->face.getNumVertices() - 4); this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 5);
				this->face.addIndex(this->face.getNumVertices() - 4); this->face.addIndex(this->face.getNumVertices() - 5); this->face.addIndex(this->face.getNumVertices() - 8);

				this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 2); this->face.addIndex(this->face.getNumVertices() - 6);
				this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 6); this->face.addIndex(this->face.getNumVertices() - 7);

				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);

				this->line.addIndex(this->line.getNumVertices() - 5); this->line.addIndex(this->line.getNumVertices() - 8);
				this->line.addIndex(this->line.getNumVertices() - 6); this->line.addIndex(this->line.getNumVertices() - 7);

				if (next_noise_value < threshold) {

					this->face.addIndex(this->face.getNumVertices() - 2); this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 5);
					this->face.addIndex(this->face.getNumVertices() - 5); this->face.addIndex(this->face.getNumVertices() - 6); this->face.addIndex(this->face.getNumVertices() - 2);

					this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 2);
					this->line.addIndex(this->line.getNumVertices() - 5); this->line.addIndex(this->line.getNumVertices() - 6);

					this->line.addIndex(this->line.getNumVertices() - 2); this->line.addIndex(this->line.getNumVertices() - 6);
					this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 5);
				}

				if (prev_noise_value < threshold) {

					this->face.addIndex(this->face.getNumVertices() - 4); this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 7);
					this->face.addIndex(this->face.getNumVertices() - 7); this->face.addIndex(this->face.getNumVertices() - 8); this->face.addIndex(this->face.getNumVertices() - 4);

					this->line.addIndex(this->line.getNumVertices() - 3); this->line.addIndex(this->line.getNumVertices() - 4);
					this->line.addIndex(this->line.getNumVertices() - 7); this->line.addIndex(this->line.getNumVertices() - 8);

					this->line.addIndex(this->line.getNumVertices() - 3); this->line.addIndex(this->line.getNumVertices() - 7);
					this->line.addIndex(this->line.getNumVertices() - 4); this->line.addIndex(this->line.getNumVertices() - 8);
				}
			}
		}
	}
}

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

	this->cam.begin();

	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(0);

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 u_span = 15;

float threshold = 0.55;

for (float r = 40; r < 90; r += 10) {

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

for (float v = 0; v < 360; v += 1.5) {

auto noise_value = ofNoise(glm::vec4(this->make_point(R, r * 10, u, v) * 0.0015, ofGetFrameNum() * 0.008));

if (noise_value < threshold) {

continue;

}

auto prev_noise_value = ofNoise(glm::vec4(this->make_point(R, r * 10, u, v - 1.5) * 0.0015, ofGetFrameNum() * 0.008));

auto next_noise_value = ofNoise(glm::vec4(this->make_point(R, r * 10, u, v + 1.5) * 0.0015, ofGetFrameNum() * 0.008));

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)));

vertices.push_back(glm::vec3(this->make_point(R, r - 9, u - u_span * 0.5 + 1, v - 1.5)));

vertices.push_back(glm::vec3(this->make_point(R, r - 9, u + u_span * 0.5 - 1, v - 1.5)));

vertices.push_back(glm::vec3(this->make_point(R, r - 9, u + u_span * 0.5 - 1, v + 1.5)));

vertices.push_back(glm::vec3(this->make_point(R, r - 9, u - u_span * 0.5 + 1, v + 1.5)));

this->face.addVertices(vertices);

this->line.addVertices(vertices);

for (int i = 0; i < vertices.size(); 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->face.addIndex(this->face.getNumVertices() - 5); this->face.addIndex(this->face.getNumVertices() - 6); this->face.addIndex(this->face.getNumVertices() - 8);

this->face.addIndex(this->face.getNumVertices() - 7); this->face.addIndex(this->face.getNumVertices() - 6); this->face.addIndex(this->face.getNumVertices() - 8);

this->face.addIndex(this->face.getNumVertices() - 4); this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 5);

this->face.addIndex(this->face.getNumVertices() - 4); this->face.addIndex(this->face.getNumVertices() - 5); this->face.addIndex(this->face.getNumVertices() - 8);

this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 2); this->face.addIndex(this->face.getNumVertices() - 6);

this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 6); this->face.addIndex(this->face.getNumVertices() - 7);

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);

this->line.addIndex(this->line.getNumVertices() - 5); this->line.addIndex(this->line.getNumVertices() - 8);

this->line.addIndex(this->line.getNumVertices() - 6); this->line.addIndex(this->line.getNumVertices() - 7);

if (next_noise_value < threshold) {

this->face.addIndex(this->face.getNumVertices() - 2); this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 5);

this->face.addIndex(this->face.getNumVertices() - 5); this->face.addIndex(this->face.getNumVertices() - 6); this->face.addIndex(this->face.getNumVertices() - 2);

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

this->line.addIndex(this->line.getNumVertices() - 5); this->line.addIndex(this->line.getNumVertices() - 6);

this->line.addIndex(this->line.getNumVertices() - 2); this->line.addIndex(this->line.getNumVertices() - 6);

this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 5);

}

if (prev_noise_value < threshold) {

this->face.addIndex(this->face.getNumVertices() - 4); this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 7);

this->face.addIndex(this->face.getNumVertices() - 7); this->face.addIndex(this->face.getNumVertices() - 8); this->face.addIndex(this->face.getNumVertices() - 4);

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

this->line.addIndex(this->line.getNumVertices() - 7); this->line.addIndex(this->line.getNumVertices() - 8);

this->line.addIndex(this->line.getNumVertices() - 3); this->line.addIndex(this->line.getNumVertices() - 7);

this->line.addIndex(this->line.getNumVertices() - 4); this->line.addIndex(this->line.getNumVertices() - 8);

}

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

void ofApp::draw() {

this->cam.begin();

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/Insta20220605

2022年6月3日

Ameba of pair. Draw by openFrameworks

[ Video ]

[ About ]
2つのアメーバ。

Pair ameba.

[ 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) {};

	ofMesh mesh;
	vector<float> noise_seed_list;
	vector<float> noise_param_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) {};

ofMesh mesh;

vector<float> noise_seed_list;

vector<float> noise_param_list;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
	ofSetLineWidth(2);

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

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

		this->noise_seed_list.push_back(ofRandom(1000));
		this->noise_param_list.push_back(0);
	}
}

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

	this->mesh.clear();

	int radius = 320;
	int span = 28;

	for (int deg_start = 1; deg_start < 360; deg_start += 90) {

		for (int deg = deg_start; deg < deg_start + 88; deg += 2) {

			for (int i = 0; i < this->noise_seed_list.size(); i++) {

				auto noise_location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));
				auto noise_param = ofMap(ofNoise(this->noise_seed_list[i], deg * 0.025 + this->noise_param_list[i]), 0, 1, 0.5, 1.0);

				this->mesh.addVertex(glm::vec3(radius * noise_param * cos(deg * DEG_TO_RAD), radius * noise_param * sin(deg * DEG_TO_RAD), 0));

				if (i > 0) {

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

				if (deg > deg_start) {

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

				if (i % 2 == 0) {

					this->mesh.addColor(ofColor(0, 0, 255));
				}
				else {

					this->mesh.addColor(ofColor(255, 0, 0));
				}
			}
		}
	}

	for (int i = 0; i < this->noise_param_list.size(); i++) {

		this->noise_param_list[i] += 0.008;
	}
}

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

	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);

	this->mesh.drawWireframe();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

ofSetLineWidth(2);

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

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

this->noise_seed_list.push_back(ofRandom(1000));

this->noise_param_list.push_back(0);

}

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

void ofApp::update() {

this->mesh.clear();

int radius = 320;

int span = 28;

for (int deg_start = 1; deg_start < 360; deg_start += 90) {

for (int deg = deg_start; deg < deg_start + 88; deg += 2) {

for (int i = 0; i < this->noise_seed_list.size(); i++) {

auto noise_location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));

auto noise_param = ofMap(ofNoise(this->noise_seed_list[i], deg * 0.025 + this->noise_param_list[i]), 0, 1, 0.5, 1.0);

this->mesh.addVertex(glm::vec3(radius * noise_param * cos(deg * DEG_TO_RAD), radius * noise_param * sin(deg * DEG_TO_RAD), 0));

if (i > 0) {

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

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

}

if (deg > deg_start) {

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

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

}

if (i % 2 == 0) {

this->mesh.addColor(ofColor(0, 0, 255));

}

else {

this->mesh.addColor(ofColor(255, 0, 0));

}

for (int i = 0; i < this->noise_param_list.size(); i++) {

this->noise_param_list[i] += 0.008;

}

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

void ofApp::draw() {

ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);

this->mesh.drawWireframe();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220603

2022年6月2日

Monochrome rings. Draw by openFrameworks

[ Video ]

[ About ]
白黒トーラスリング。

White black torus rings.

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

public:
	void setup();
	void update();
	void draw();

	void keyPressed(int key) {};
	void keyReleased(int key) {};
	void mouseMoved(int x, int y) {};
	void mouseDragged(int x, int y, int button) {};
	void mousePressed(int x, int y, int button) {};
	void mouseReleased(int x, int y, int button) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

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

	ofEasyCam cam;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

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

ofEasyCam cam;

};

#include "ofApp.h"

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

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

	ofBackground(128);
	ofSetLineWidth(1.25);
	ofEnableDepthTest();
}

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

}

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

	this->cam.begin();
	ofRotateX(360 - 60);

	float R = 200;
	float r = 50;
	float u_span = 10;

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

	for (int r = 50; r > 0; r -= 5) {

		int v_start = ofMap(ofNoise(r * 0.03 + ofGetFrameNum() * 0.025), 0, 1, -360, 360);
		int v_end = v_start + 60;
		int v_span = 2;

		for (int v = v_start; v <= v_end; v += v_span) {

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

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

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

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

					if (r % 10 == 0) {

						face.addColor(ofColor(0));
						line.addColor(ofColor(255));
					}
					else {

						face.addColor(ofColor(255));
						line.addColor(ofColor(0));
					}
				}

				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);

				if (v == v_start) {

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

				if (v == v_end) {

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

	face.draw();
	line.drawWireframe();

	this->cam.end();
}

//--------------------------------------------------------------
glm::vec3 ofApp::make_point(float R, float r, float u, float v) {

	// 数学デッサン教室 描いて楽しむ数学たち　P.31

	u *= DEG_TO_RAD;
	v *= DEG_TO_RAD;

	auto x = (R + r * cos(u)) * cos(v);
	auto y = (R + r * cos(u)) * sin(v);
	auto z = r * sin(u);

	return glm::vec3(x, y, z);
}

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

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

100

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(128);

ofSetLineWidth(1.25);

ofEnableDepthTest();

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(360 - 60);

float R = 200;

float r = 50;

float u_span = 10;

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

for (int r = 50; r > 0; r -= 5) {

int v_start = ofMap(ofNoise(r * 0.03 + ofGetFrameNum() * 0.025), 0, 1, -360, 360);

int v_end = v_start + 60;

int v_span = 2;

for (int v = v_start; v <= v_end; v += v_span) {

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

face.addVertex(this->make_point(R, r, u - u_span * 0.5, v - v_span * 0.5));

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

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

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

line.addVertex(this->make_point(R, r, u - u_span * 0.5, v - v_span * 0.5));

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

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

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

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

if (r % 10 == 0) {

face.addColor(ofColor(0));

line.addColor(ofColor(255));

}

else {

face.addColor(ofColor(255));

line.addColor(ofColor(0));

}

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);

if (v == v_start) {

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

}

if (v == v_end) {

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

}

face.draw();

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/Insta20220602

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