openFrameworks – ページ 254 – プログラミング de 落描き

2023年10月18日

Overlap frames.

[ Video ]

[ About ]
フレームを重ねる。

[ 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;

	float noise_step;
};

#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;

float noise_step;

};

#include "ofApp.h"

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

	ofSetFrameRate(25);
	ofSetWindowTitle("openframeworks");

	ofBackground(0);

	ofEnableDepthTest();
	ofSetLineWidth(3);
}

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

	auto param = ofGetFrameNum() % 50;
	if (param > 12 && param < 38) {

		if (param < 25) {

			this->noise_step += ofMap(param, 12, 25, 0, 0.125);
		}
		else if (param > 25) {

			this->noise_step += ofMap(param, 25, 38, 0.125, 0);
		}
	}

}

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

	this->cam.begin();

	int width = 350;
	int height = 350;
	int len = 15;
	for (int z = -300; z <= 600; z += 10) {

		ofPushMatrix();
		ofTranslate(0, 0, z);
		ofRotate(ofMap(ofNoise((z + 300) * 0.0015 + this->noise_step), 0, 1, -360, 360));

		ofFill();
		ofSetColor(0);

		ofBeginShape();

		ofVertex(glm::vec2(width * -0.5, height * -0.5));
		ofVertex(glm::vec2(width * 0.5, height * -0.5));
		ofVertex(glm::vec2(width * 0.5, height * 0.5));
		ofVertex(glm::vec2(width * -0.5, height * 0.5));

		ofNextContour(true);

		ofVertex(glm::vec2(width * -0.5 + len, height * -0.5 + len));
		ofVertex(glm::vec2(width * 0.5 - len, height * -0.5 + len));
		ofVertex(glm::vec2(width * 0.5 - len, height * 0.5 - len));
		ofVertex(glm::vec2(width * -0.5 + len, height * 0.5 - len));

		ofEndShape(true);

		ofNoFill();
		ofSetColor(255, ofMap(z, -300, 600, 0, 255));

		ofBeginShape();

		ofVertex(glm::vec2(width * -0.5, height * -0.5));
		ofVertex(glm::vec2(width * 0.5, height * -0.5));
		ofVertex(glm::vec2(width * 0.5, height * 0.5));
		ofVertex(glm::vec2(width * -0.5, height * 0.5));

		ofNextContour(true);

		ofVertex(glm::vec2(width * -0.5 + len, height * -0.5 + len));
		ofVertex(glm::vec2(width * 0.5 - len, height * -0.5 + len));
		ofVertex(glm::vec2(width * 0.5 - len, height * 0.5 - len));
		ofVertex(glm::vec2(width * -0.5 + len, height * 0.5 - len));

		ofEndShape(true);

		ofPopMatrix();
	}

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(25);

ofSetWindowTitle("openframeworks");

ofBackground(0);

ofEnableDepthTest();

ofSetLineWidth(3);

}

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

void ofApp::update() {

auto param = ofGetFrameNum() % 50;

if (param > 12 && param < 38) {

if (param < 25) {

this->noise_step += ofMap(param, 12, 25, 0, 0.125);

}

else if (param > 25) {

this->noise_step += ofMap(param, 25, 38, 0.125, 0);

}

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

void ofApp::draw() {

this->cam.begin();

int width = 350;

int height = 350;

int len = 15;

for (int z = -300; z <= 600; z += 10) {

ofPushMatrix();

ofTranslate(0, 0, z);

ofRotate(ofMap(ofNoise((z + 300) * 0.0015 + this->noise_step), 0, 1, -360, 360));

ofFill();

ofSetColor(0);

ofBeginShape();

ofVertex(glm::vec2(width * -0.5, height * -0.5));

ofVertex(glm::vec2(width * 0.5, height * -0.5));

ofVertex(glm::vec2(width * 0.5, height * 0.5));

ofVertex(glm::vec2(width * -0.5, height * 0.5));

ofNextContour(true);

ofVertex(glm::vec2(width * -0.5 + len, height * -0.5 + len));

ofVertex(glm::vec2(width * 0.5 - len, height * -0.5 + len));

ofVertex(glm::vec2(width * 0.5 - len, height * 0.5 - len));

ofVertex(glm::vec2(width * -0.5 + len, height * 0.5 - len));

ofEndShape(true);

ofNoFill();

ofSetColor(255, ofMap(z, -300, 600, 0, 255));

ofBeginShape();

ofVertex(glm::vec2(width * -0.5, height * -0.5));

ofVertex(glm::vec2(width * 0.5, height * -0.5));

ofVertex(glm::vec2(width * 0.5, height * 0.5));

ofVertex(glm::vec2(width * -0.5, height * 0.5));

ofNextContour(true);

ofVertex(glm::vec2(width * -0.5 + len, height * -0.5 + len));

ofVertex(glm::vec2(width * 0.5 - len, height * -0.5 + len));

ofVertex(glm::vec2(width * 0.5 - len, height * 0.5 - len));

ofVertex(glm::vec2(width * -0.5 + len, height * 0.5 - len));

ofEndShape(true);

ofPopMatrix();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20231018

2023年10月17日

Overlap rects.

[ Video ]

[ About ]
資格を重ねる。

[ 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) {};

	void setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float height, float width, float depth, float rotate_deg);

	ofEasyCam cam;
	ofMesh face, frame;

	float noise_step;
};

#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) {};

void setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float height, float width, float depth, float rotate_deg);

ofEasyCam cam;

ofMesh face, frame;

float noise_step;

};

#include "ofApp.h"

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

	ofSetFrameRate(25);
	ofSetWindowTitle("openFrameworks");

	ofBackground(39);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

	auto param = ofGetFrameNum() % 50;
	if (param > 12 && param < 38) {

		if (param < 25) {

			this->noise_step += ofMap(param, 12, 25, 0, 0.1);
		}
		else if (param > 25) {

			this->noise_step += ofMap(param, 25, 38, 0.1, 0);
		}
	}

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

	float total_height = 600;
	float total_len = total_height * 5;
	float total_height_noise_value = 0;
	float total_len_noise_value = 0;
	vector<float> height_noise_value_list;
	vector<float> len_noise_value_list;

	for (int i = 0; i < 10; i++) {

		auto noise_value = ofNoise(ofRandom(1000), this->noise_step);
		height_noise_value_list.push_back(noise_value);
		total_height_noise_value += noise_value;

		noise_value = ofNoise(ofRandom(1000), this->noise_step);
		len_noise_value_list.push_back(noise_value);
		total_len_noise_value += noise_value;
	}

	float height_param = total_height / total_height_noise_value;
	float len_param = total_len / total_len_noise_value;

	float y = -300;
	float prev_height = 0;
	for (int i = 0; i < 10; i++) {

		auto len = len_noise_value_list[i] * len_param;
		auto height = height_noise_value_list[i] * height_param;
		y += height * 0.5 + prev_height * 0.5;

		this->setBoxToMesh(this->face, this->frame, glm::vec3(0, y, 0), height - 4, len, len, ofMap(ofNoise(ofRandom(360), this->noise_step), 0, 1, -360, 360));
		prev_height = height;
	}
}

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

	this->cam.begin();

	ofSetColor(0);
	this->face.draw();

	ofSetColor(255);
	this->frame.drawWireframe();

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float height, float width, float depth, float rotate_deg) {

	float rad = rotate_deg * DEG_TO_RAD;
	auto rotation = glm::rotate(glm::mat4(), rad, glm::vec3(0, 1, 0));

	int index = face_target.getVertices().size();

	face_target.addVertex(location + glm::vec4(width * -0.5 * 0.99, height * 0.5 * 0.99, depth * -0.5 * 0.99, 0) * rotation);
	face_target.addVertex(location + glm::vec4(width * 0.5 * 0.99, height * 0.5 * 0.99, depth * -0.5 * 0.99, 0) * rotation);
	face_target.addVertex(location + glm::vec4(width * 0.5 * 0.99, height * 0.5 * 0.99, depth * 0.5 * 0.99, 0) * rotation);
	face_target.addVertex(location + glm::vec4(width * -0.5 * 0.99, height * 0.5 * 0.99, depth * 0.5 * 0.99, 0) * rotation);

	face_target.addVertex(location + glm::vec4(width * -0.5 * 0.99, height * -0.5 * 0.99, depth * -0.5 * 0.99, 0) * rotation);
	face_target.addVertex(location + glm::vec4(width * 0.5 * 0.99, height * -0.5 * 0.99, depth * -0.5 * 0.99, 0) * rotation);
	face_target.addVertex(location + glm::vec4(width * 0.5 * 0.99, height * -0.5 * 0.99, depth * 0.5 * 0.99, 0) * rotation);
	face_target.addVertex(location + glm::vec4(width * -0.5 * 0.99, height * -0.5 * 0.99, depth * 0.5 * 0.99, 0) * rotation);

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

	face_target.addIndex(index + 4); face_target.addIndex(index + 5); face_target.addIndex(index + 6);
	face_target.addIndex(index + 4); face_target.addIndex(index + 6); face_target.addIndex(index + 7);

	face_target.addIndex(index + 0); face_target.addIndex(index + 4); face_target.addIndex(index + 1);
	face_target.addIndex(index + 4); face_target.addIndex(index + 5); face_target.addIndex(index + 1);

	face_target.addIndex(index + 1); face_target.addIndex(index + 5); face_target.addIndex(index + 6);
	face_target.addIndex(index + 6); face_target.addIndex(index + 2); face_target.addIndex(index + 1);

	face_target.addIndex(index + 2); face_target.addIndex(index + 6); face_target.addIndex(index + 7);
	face_target.addIndex(index + 7); face_target.addIndex(index + 3); face_target.addIndex(index + 2);

	face_target.addIndex(index + 3); face_target.addIndex(index + 7); face_target.addIndex(index + 4);
	face_target.addIndex(index + 4); face_target.addIndex(index + 0); face_target.addIndex(index + 3);

	frame_target.addVertex(location + glm::vec4(width * -0.5, height * 0.5, depth * -0.5, 0) * rotation);
	frame_target.addVertex(location + glm::vec4(width * 0.5, height * 0.5, depth * -0.5, 0) * rotation);
	frame_target.addVertex(location + glm::vec4(width * 0.5, height * 0.5, depth * 0.5, 0) * rotation);
	frame_target.addVertex(location + glm::vec4(width * -0.5, height * 0.5, depth * 0.5, 0) * rotation);

	frame_target.addVertex(location + glm::vec4(width * -0.5, height * -0.5, depth * -0.5, 0) * rotation);
	frame_target.addVertex(location + glm::vec4(width * 0.5, height * -0.5, depth * -0.5, 0) * rotation);
	frame_target.addVertex(location + glm::vec4(width * 0.5, height * -0.5, depth * 0.5, 0) * rotation);
	frame_target.addVertex(location + glm::vec4(width * -0.5, height * -0.5, depth * 0.5, 0) * rotation);

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

	frame_target.addIndex(index + 4); frame_target.addIndex(index + 5);
	frame_target.addIndex(index + 5); frame_target.addIndex(index + 6);
	frame_target.addIndex(index + 6); frame_target.addIndex(index + 7);
	frame_target.addIndex(index + 7); frame_target.addIndex(index + 4);

	frame_target.addIndex(index + 0); frame_target.addIndex(index + 4);
	frame_target.addIndex(index + 1); frame_target.addIndex(index + 5);
	frame_target.addIndex(index + 2); frame_target.addIndex(index + 6);
	frame_target.addIndex(index + 3); frame_target.addIndex(index + 7);
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(25);

ofSetWindowTitle("openFrameworks");

ofBackground(39);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

auto param = ofGetFrameNum() % 50;

if (param > 12 && param < 38) {

if (param < 25) {

this->noise_step += ofMap(param, 12, 25, 0, 0.1);

}

else if (param > 25) {

this->noise_step += ofMap(param, 25, 38, 0.1, 0);

}

this->face.clear();

this->frame.clear();

float total_height = 600;

float total_len = total_height * 5;

float total_height_noise_value = 0;

float total_len_noise_value = 0;

vector<float> height_noise_value_list;

vector<float> len_noise_value_list;

for (int i = 0; i < 10; i++) {

auto noise_value = ofNoise(ofRandom(1000), this->noise_step);

height_noise_value_list.push_back(noise_value);

total_height_noise_value += noise_value;

noise_value = ofNoise(ofRandom(1000), this->noise_step);

len_noise_value_list.push_back(noise_value);

total_len_noise_value += noise_value;

}

float height_param = total_height / total_height_noise_value;

float len_param = total_len / total_len_noise_value;

float y = -300;

float prev_height = 0;

for (int i = 0; i < 10; i++) {

auto len = len_noise_value_list[i] * len_param;

auto height = height_noise_value_list[i] * height_param;

y += height * 0.5 + prev_height * 0.5;

this->setBoxToMesh(this->face, this->frame, glm::vec3(0, y, 0), height - 4, len, len, ofMap(ofNoise(ofRandom(360), this->noise_step), 0, 1, -360, 360));

prev_height = height;

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(0);

this->face.draw();

ofSetColor(255);

this->frame.drawWireframe();

this->cam.end();

}

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

void ofApp::setBoxToMesh(ofMesh& face_target, ofMesh& frame_target, glm::vec3 location, float height, float width, float depth, float rotate_deg) {

float rad = rotate_deg * DEG_TO_RAD;

auto rotation = glm::rotate(glm::mat4(), rad, glm::vec3(0, 1, 0));

int index = face_target.getVertices().size();

face_target.addVertex(location + glm::vec4(width * -0.5 * 0.99, height * 0.5 * 0.99, depth * -0.5 * 0.99, 0) * rotation);

face_target.addVertex(location + glm::vec4(width * 0.5 * 0.99, height * 0.5 * 0.99, depth * -0.5 * 0.99, 0) * rotation);

face_target.addVertex(location + glm::vec4(width * 0.5 * 0.99, height * 0.5 * 0.99, depth * 0.5 * 0.99, 0) * rotation);

face_target.addVertex(location + glm::vec4(width * -0.5 * 0.99, height * 0.5 * 0.99, depth * 0.5 * 0.99, 0) * rotation);

face_target.addVertex(location + glm::vec4(width * -0.5 * 0.99, height * -0.5 * 0.99, depth * -0.5 * 0.99, 0) * rotation);

face_target.addVertex(location + glm::vec4(width * 0.5 * 0.99, height * -0.5 * 0.99, depth * -0.5 * 0.99, 0) * rotation);

face_target.addVertex(location + glm::vec4(width * 0.5 * 0.99, height * -0.5 * 0.99, depth * 0.5 * 0.99, 0) * rotation);

face_target.addVertex(location + glm::vec4(width * -0.5 * 0.99, height * -0.5 * 0.99, depth * 0.5 * 0.99, 0) * rotation);

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

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

face_target.addIndex(index + 4); face_target.addIndex(index + 5); face_target.addIndex(index + 6);

face_target.addIndex(index + 4); face_target.addIndex(index + 6); face_target.addIndex(index + 7);

face_target.addIndex(index + 0); face_target.addIndex(index + 4); face_target.addIndex(index + 1);

face_target.addIndex(index + 4); face_target.addIndex(index + 5); face_target.addIndex(index + 1);

face_target.addIndex(index + 1); face_target.addIndex(index + 5); face_target.addIndex(index + 6);

face_target.addIndex(index + 6); face_target.addIndex(index + 2); face_target.addIndex(index + 1);

face_target.addIndex(index + 2); face_target.addIndex(index + 6); face_target.addIndex(index + 7);

face_target.addIndex(index + 7); face_target.addIndex(index + 3); face_target.addIndex(index + 2);

face_target.addIndex(index + 3); face_target.addIndex(index + 7); face_target.addIndex(index + 4);

face_target.addIndex(index + 4); face_target.addIndex(index + 0); face_target.addIndex(index + 3);

frame_target.addVertex(location + glm::vec4(width * -0.5, height * 0.5, depth * -0.5, 0) * rotation);

frame_target.addVertex(location + glm::vec4(width * 0.5, height * 0.5, depth * -0.5, 0) * rotation);

frame_target.addVertex(location + glm::vec4(width * 0.5, height * 0.5, depth * 0.5, 0) * rotation);

frame_target.addVertex(location + glm::vec4(width * -0.5, height * 0.5, depth * 0.5, 0) * rotation);

frame_target.addVertex(location + glm::vec4(width * -0.5, height * -0.5, depth * -0.5, 0) * rotation);

frame_target.addVertex(location + glm::vec4(width * 0.5, height * -0.5, depth * -0.5, 0) * rotation);

frame_target.addVertex(location + glm::vec4(width * 0.5, height * -0.5, depth * 0.5, 0) * rotation);

frame_target.addVertex(location + glm::vec4(width * -0.5, height * -0.5, depth * 0.5, 0) * rotation);

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

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

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

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

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

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

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

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

frame_target.addIndex(index + 0); frame_target.addIndex(index + 4);

frame_target.addIndex(index + 1); frame_target.addIndex(index + 5);

frame_target.addIndex(index + 2); frame_target.addIndex(index + 6);

frame_target.addIndex(index + 3); frame_target.addIndex(index + 7);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20231017

2023年10月16日

Arcs.

[ Video ]

[ About ]
Arcs.

[ 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(25);
	ofSetWindowTitle("openframeworks");

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

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

}

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

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

	float R = 200;
	float r = 50;
	float u_span = 5;

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

	for (int r = 50; r > 0; r -= 2) {

		int v_start = ofMap(ofNoise(r * 0.06 + ofGetFrameNum() * 0.01), 0, 1, -720, 720);
		int v_end = v_start + 12;
		int v_span = 1;

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

			for (int u = 0; u < 180; 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 * 0.51, v - v_span * 0.51));
				line.addVertex(this->make_point(R, r, u + u_span * 0.51, v - v_span * 0.51));
				line.addVertex(this->make_point(R, r, u + u_span * 0.51, v + v_span * 0.51));
				line.addVertex(this->make_point(R, r, u - u_span * 0.51, v + v_span * 0.51));

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

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

				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

101

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(25);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetLineWidth(2);

ofEnableDepthTest();

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(360 - 60);

float R = 200;

float r = 50;

float u_span = 5;

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

for (int r = 50; r > 0; r -= 2) {

int v_start = ofMap(ofNoise(r * 0.06 + ofGetFrameNum() * 0.01), 0, 1, -720, 720);

int v_end = v_start + 12;

int v_span = 1;

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

for (int u = 0; u < 180; 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 * 0.51, v - v_span * 0.51));

line.addVertex(this->make_point(R, r, u + u_span * 0.51, v - v_span * 0.51));

line.addVertex(this->make_point(R, r, u + u_span * 0.51, v + v_span * 0.51));

line.addVertex(this->make_point(R, r, u - u_span * 0.51, v + v_span * 0.51));

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

face.addColor(ofColor(0));

line.addColor(ofColor(255));

}

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/Insta20231016

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