2021年5月 – ページ 10 – プログラミング de 落描き

2021年5月4日

Tetrahedron. Draw by openFrameworks

[ Video ]

[ About ]
Tetrahedron.

[ 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;
};

#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;

};

#include "ofApp.h"

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

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

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

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	auto flag = true;
	for (int x = -300; x <= 300; x += 200) {

		for (int y = -300; y <= 300; y += 200) {

			ofMesh mesh;
			auto param = 50;
			auto noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));

			int angle_x = ofMap(ofNoise(noise_seed.x, ofGetFrameNum() * 0.003), 0, 1, -360, 360);
			auto rotation_x = glm::rotate(glm::mat4(), angle_x * (float)DEG_TO_RAD, glm::vec3(1, 0, 0));

			int angle_y = ofMap(ofNoise(noise_seed.y, ofGetFrameNum() * 0.003), 0, 1, -360, 360);
			auto rotation_y = glm::rotate(glm::mat4(), angle_y * (float)DEG_TO_RAD, glm::vec3(0, 1, 0));

			int angle_z = ofMap(ofNoise(noise_seed.z, ofGetFrameNum() * 0.003), 0, 1, -360, 360);
			auto rotation_z = glm::rotate(glm::mat4(), angle_y * (float)DEG_TO_RAD, glm::vec3(0, 0, 1));

			mesh.addVertex(glm::vec3(x, y, 0) + glm::vec4(param, param, param, 0) * rotation_z * rotation_y * rotation_z);
			mesh.addVertex(glm::vec3(x, y, 0) + glm::vec4(param, -param, -param, 0) * rotation_z * rotation_y * rotation_z);
			mesh.addVertex(glm::vec3(x, y, 0) + glm::vec4(-param, param, -param, 0) * rotation_z * rotation_y * rotation_z);
			mesh.addVertex(glm::vec3(x, y, 0) + glm::vec4(-param, -param, param, 0) * rotation_z * rotation_y * rotation_z);

			mesh.addIndex(0); mesh.addIndex(1); mesh.addIndex(2);
			mesh.addIndex(0); mesh.addIndex(1); mesh.addIndex(3);
			mesh.addIndex(0); mesh.addIndex(2); mesh.addIndex(3);
			mesh.addIndex(1); mesh.addIndex(2); mesh.addIndex(3);

			if (flag = !flag) {
			
				ofSetColor(239);
				mesh.drawFaces();
			}

			ofSetColor(39);
			mesh.drawWireframe();

			for (auto& vertex : mesh.getVertices()) {

				ofDrawSphere(vertex, 5);

			}
		}

		flag = !flag;
	}

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetLineWidth(2);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

auto flag = true;

for (int x = -300; x <= 300; x += 200) {

for (int y = -300; y <= 300; y += 200) {

ofMesh mesh;

auto param = 50;

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

int angle_x = ofMap(ofNoise(noise_seed.x, ofGetFrameNum() * 0.003), 0, 1, -360, 360);

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

int angle_y = ofMap(ofNoise(noise_seed.y, ofGetFrameNum() * 0.003), 0, 1, -360, 360);

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

int angle_z = ofMap(ofNoise(noise_seed.z, ofGetFrameNum() * 0.003), 0, 1, -360, 360);

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

mesh.addVertex(glm::vec3(x, y, 0) + glm::vec4(param, param, param, 0) * rotation_z * rotation_y * rotation_z);

mesh.addVertex(glm::vec3(x, y, 0) + glm::vec4(param, -param, -param, 0) * rotation_z * rotation_y * rotation_z);

mesh.addVertex(glm::vec3(x, y, 0) + glm::vec4(-param, param, -param, 0) * rotation_z * rotation_y * rotation_z);

mesh.addVertex(glm::vec3(x, y, 0) + glm::vec4(-param, -param, param, 0) * rotation_z * rotation_y * rotation_z);

mesh.addIndex(0); mesh.addIndex(1); mesh.addIndex(2);

mesh.addIndex(0); mesh.addIndex(1); mesh.addIndex(3);

mesh.addIndex(0); mesh.addIndex(2); mesh.addIndex(3);

mesh.addIndex(1); mesh.addIndex(2); mesh.addIndex(3);

if (flag = !flag) {

ofSetColor(239);

mesh.drawFaces();

}

ofSetColor(39);

mesh.drawWireframe();

for (auto& vertex : mesh.getVertices()) {

ofDrawSphere(vertex, 5);

}

flag = !flag;

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210504

2021年5月3日

Tornado ( Torus + z ). Draw by openFrameworks

[ Video ]

[ About ]
Tornado.

[ 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(239);
	ofSetLineWidth(1);
	ofEnableDepthTest();
}

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

}

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

	this->cam.begin();
	ofRotateX(270);

	int v_span = 1;
	int u_span = 60;

	float z = 360 * -2;
	float z_span = 1;
	ofMesh face, line;
	line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
	for (int v = 0; v <= 360 * 4; v += v_span) {

		bool flag = true;
		int u_start = ofMap(ofNoise(z * 0.005 + ofGetFrameNum() * 0.015), 0, 1, -720, 720);
		int next_u = ofMap(ofNoise((z + z_span) * 0.005 + ofGetFrameNum() * 0.015), 0, 1, -720, 720);
		for (int u = u_start; u < u_start + 360; u += u_span) {

			if (flag) {

				face.addVertex(this->make_point(200, 50, u, v) + glm::vec3(0, 0, z));
				face.addVertex(this->make_point(200, 50, u + u_span, v) + glm::vec3(0, 0, z));
				face.addVertex(this->make_point(200, 50, next_u + u_span, v + v_span) + glm::vec3(0, 0, z + z_span));
				face.addVertex(this->make_point(200, 50, next_u, v + v_span) + glm::vec3(0, 0, z + z_span));

				line.addVertex(this->make_point(200, 50, u, v) + glm::vec3(0, 0, z));
				line.addVertex(this->make_point(200, 50, u + u_span, v) + glm::vec3(0, 0, z));
				line.addVertex(this->make_point(200, 50, next_u + u_span, v + v_span) + glm::vec3(0, 0, z + z_span));
				line.addVertex(this->make_point(200, 50, next_u, v + v_span) + glm::vec3(0, 0, z + z_span));

				ofColor color;
				color.setHsb(ofMap(u, u_start, u_start + 360, 0, 255), 150, 255);

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

		z += z_span;
	}

	face.drawFaces();

	ofSetColor(39);
	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(239);

ofSetLineWidth(1);

ofEnableDepthTest();

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(270);

int v_span = 1;

int u_span = 60;

float z = 360 * -2;

float z_span = 1;

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

for (int v = 0; v <= 360 * 4; v += v_span) {

bool flag = true;

int u_start = ofMap(ofNoise(z * 0.005 + ofGetFrameNum() * 0.015), 0, 1, -720, 720);

int next_u = ofMap(ofNoise((z + z_span) * 0.005 + ofGetFrameNum() * 0.015), 0, 1, -720, 720);

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

if (flag) {

face.addVertex(this->make_point(200, 50, u, v) + glm::vec3(0, 0, z));

face.addVertex(this->make_point(200, 50, u + u_span, v) + glm::vec3(0, 0, z));

face.addVertex(this->make_point(200, 50, next_u + u_span, v + v_span) + glm::vec3(0, 0, z + z_span));

face.addVertex(this->make_point(200, 50, next_u, v + v_span) + glm::vec3(0, 0, z + z_span));

line.addVertex(this->make_point(200, 50, u, v) + glm::vec3(0, 0, z));

line.addVertex(this->make_point(200, 50, u + u_span, v) + glm::vec3(0, 0, z));

line.addVertex(this->make_point(200, 50, next_u + u_span, v + v_span) + glm::vec3(0, 0, z + z_span));

line.addVertex(this->make_point(200, 50, next_u, v + v_span) + glm::vec3(0, 0, z + z_span));

ofColor color;

color.setHsb(ofMap(u, u_start, u_start + 360, 0, 255), 150, 255);

face.addColor(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;

}

z += z_span;

}

face.drawFaces();

ofSetColor(39);

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/Insta20210503

2021年5月2日

Twisting torus and random walker. Draw by openFrameworks

[ Video ]

[ About ]
Twisting torus and random 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 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 sphere_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 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 sphere_list;

};

#include "ofApp.h"

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

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

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

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

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

	ofSeedRandom(39);

	this->sphere_list.clear();

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

		color.setHex(hex);
		base_color_list.push_back(color);
	}

	int color_index = 0;
	for (int i = 0; i < 150; i++) {

		auto u_speed = ofRandom(1, 1.5);
		auto v_speed = ofRandom(1, 1.5);
		auto sphere_u = ofRandom(360) + ofGetFrameNum() * u_speed;
		auto sphere_v = ofRandom(360) + ofGetFrameNum() * v_speed;
		int sphere_r = ofRandom(30);

		this->sphere_list.addVertex(this->make_point(200, sphere_r, sphere_u, sphere_v));

		this->sphere_list.addColor(base_color_list[color_index]);
		color_index = (color_index + 1) % base_color_list.size();
	}

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

		for (int k = i + 1; k < this->sphere_list.getNumVertices(); k++) {

			if (glm::distance(this->sphere_list.getVertex(i), this->sphere_list.getVertex(k)) < 30) {

				this->sphere_list.addIndex(i);
				this->sphere_list.addIndex(k);
			}
		}
	}
}

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

	this->cam.begin();

	int v_span = 1;
	int u_span = 60;

	ofMesh face, line;
	line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
	for (int v = 0; v <= 360; v += v_span) {

		bool flag = true;
		int u_start = ofMap(ofNoise(200 * cos(v * DEG_TO_RAD) * 0.002, 200 * sin(v * DEG_TO_RAD) * 0.002, ofGetFrameNum() * 0.005), 0, 1, -360, 360);
		int next_u = ofMap(ofNoise(200 * cos((v + v_span) * DEG_TO_RAD) * 0.002, 200 * sin((v + v_span) * DEG_TO_RAD) * 0.002, ofGetFrameNum() * 0.005), 0, 1, -360, 360);
		for (int u = u_start; u < u_start + 360; u += u_span) {

			if (flag) {

				face.addVertex(this->make_point(200, 50, u, v));
				face.addVertex(this->make_point(200, 50, u + u_span, v));
				face.addVertex(this->make_point(200, 50, next_u + u_span, v + v_span));
				face.addVertex(this->make_point(200, 50, next_u, v + v_span));

				line.addVertex(this->make_point(200, 50, u, v));
				line.addVertex(this->make_point(200, 50, u + u_span, v));
				line.addVertex(this->make_point(200, 50, next_u + u_span, v + v_span));
				line.addVertex(this->make_point(200, 50, next_u, v + v_span));

				ofColor color = ofColor(39);
				//color.setHsb(ofMap(u, u_start, u_start + 360, 0, 255), 150, 255);

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

	ofSetColor(239);
	line.drawWireframe();

	this->sphere_list.drawWireframe();

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

		ofSetColor(this->sphere_list.getColor(i));
		ofDrawSphere(this->sphere_list.getVertex(i), 4);
	}

	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(239);

ofSetLineWidth(2);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->sphere_list.clear();

vector<ofColor> base_color_list;

ofColor color;

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

for (auto hex : hex_list) {

color.setHex(hex);

base_color_list.push_back(color);

}

int color_index = 0;

for (int i = 0; i < 150; i++) {

auto u_speed = ofRandom(1, 1.5);

auto v_speed = ofRandom(1, 1.5);

auto sphere_u = ofRandom(360) + ofGetFrameNum() * u_speed;

auto sphere_v = ofRandom(360) + ofGetFrameNum() * v_speed;

int sphere_r = ofRandom(30);

this->sphere_list.addVertex(this->make_point(200, sphere_r, sphere_u, sphere_v));

this->sphere_list.addColor(base_color_list[color_index]);

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

}

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

for (int k = i + 1; k < this->sphere_list.getNumVertices(); k++) {

if (glm::distance(this->sphere_list.getVertex(i), this->sphere_list.getVertex(k)) < 30) {

this->sphere_list.addIndex(i);

this->sphere_list.addIndex(k);

}

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

void ofApp::draw() {

this->cam.begin();

int v_span = 1;

int u_span = 60;

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

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

bool flag = true;

int u_start = ofMap(ofNoise(200 * cos(v * DEG_TO_RAD) * 0.002, 200 * sin(v * DEG_TO_RAD) * 0.002, ofGetFrameNum() * 0.005), 0, 1, -360, 360);

int next_u = ofMap(ofNoise(200 * cos((v + v_span) * DEG_TO_RAD) * 0.002, 200 * sin((v + v_span) * DEG_TO_RAD) * 0.002, ofGetFrameNum() * 0.005), 0, 1, -360, 360);

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

if (flag) {

face.addVertex(this->make_point(200, 50, u, v));

face.addVertex(this->make_point(200, 50, u + u_span, v));

face.addVertex(this->make_point(200, 50, next_u + u_span, v + v_span));

face.addVertex(this->make_point(200, 50, next_u, v + v_span));

line.addVertex(this->make_point(200, 50, u, v));

line.addVertex(this->make_point(200, 50, u + u_span, v));

line.addVertex(this->make_point(200, 50, next_u + u_span, v + v_span));

line.addVertex(this->make_point(200, 50, next_u, v + v_span));

ofColor color = ofColor(39);

//color.setHsb(ofMap(u, u_start, u_start + 360, 0, 255), 150, 255);

face.addColor(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();

ofSetColor(239);

line.drawWireframe();

this->sphere_list.drawWireframe();

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

ofSetColor(this->sphere_list.getColor(i));

ofDrawSphere(this->sphere_list.getVertex(i), 4);

}

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/Insta20210502

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