プログラミング de 落描き – ページ 523 – クリエイティブ・コーディングによる生成物とソース

2021年8月14日

Write characters. Draw by openFrameworks

[ Video ]

[ About ]
文字の輪郭をフレーム番号で制御する。

Controlling the outline of a character by frame number.

[ 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;

	ofTrueTypeFont font;
	int font_size;
	vector<char> charactor_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) {};

ofEasyCam cam;

ofTrueTypeFont font;

int font_size;

vector<char> charactor_list;

};

#include "ofApp.h"

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

	ofSetWindowTitle("openFrameworks");
	ofSetFrameRate(60);

	ofBackground(0);
	ofSetColor(10, 10, 255);
	ofNoFill();
	ofSetLineWidth(2);

	this->font_size = 55;
	this->font.loadFont("fonts/msgothic.ttc", this->font_size, true, true, true);

	this->charactor_list = { 'A', 'B', 'C', 'D', 'E', 'F',
								'G', 'H', 'I', 'J', 'K', 'L',
								'M', 'N', 'O', 'P', 'Q', 'R',
								'S', 'T', 'U', 'V', 'W', 'X',
								'Y', 'Z', '!' };
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();
	ofRotateX(180);
	ofRotateY(sin(ofGetFrameNum() * 0.01) * 30);
	ofRotateX(sin(ofGetFrameNum() * 0.02) * 15);

	int sample_count = 180;
	for (int x = this->font_size * -3; x <= this->font_size * 3; x += this->font_size * 1.25)
	{
		for (int y = this->font_size * -3; y <= this->font_size * 3; y += this->font_size * 1.25) {

			for (int z = this->font_size * -3; z <= this->font_size * 3; z += this->font_size * 1.25) {

				ofPath path = this->font.getCharacterAsPoints(this->charactor_list[(int)ofRandom(this->charactor_list.size())], true, false);
				vector<ofPolyline> outline = path.getOutline();
				auto frame_param = (int)ofRandom(sample_count * 2) + ofGetFrameNum() * (int)ofRandom(2, 4);

				for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

					outline[outline_index] = outline[outline_index].getResampledByCount(sample_count);
					vector<glm::vec3> vertices = outline[outline_index].getVertices();

					ofBeginShape();
					for (int vertices_index = 0; vertices_index < vertices.size(); vertices_index++) {

						glm::vec3 vertex = glm::vec3(x + this->font_size * 0.25, y + this->font_size, 0) + glm::vec3(vertices[vertices_index].x, vertices[vertices_index].y, z + vertices[vertices_index].z);

						if (frame_param % (sample_count * 2) < sample_count) {

							if (vertices_index < frame_param % sample_count) {

								ofVertex(vertex);
							}
						}
						else {

							if (vertices_index > frame_param % sample_count) {

								ofVertex(vertex);
							}
						}

						if (vertices_index == frame_param % sample_count) {

							ofFill();
							ofDrawSphere(vertex, 2);
							ofNoFill();
						}

					}
					ofEndShape();
				}
			}
		}
	}

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetWindowTitle("openFrameworks");

ofSetFrameRate(60);

ofBackground(0);

ofSetColor(10, 10, 255);

ofNoFill();

ofSetLineWidth(2);

this->font_size = 55;

this->font.loadFont("fonts/msgothic.ttc", this->font_size, true, true, true);

this->charactor_list = { 'A', 'B', 'C', 'D', 'E', 'F',

'G', 'H', 'I', 'J', 'K', 'L',

'M', 'N', 'O', 'P', 'Q', 'R',

'S', 'T', 'U', 'V', 'W', 'X',

'Y', 'Z', '!' };

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(180);

ofRotateY(sin(ofGetFrameNum() * 0.01) * 30);

ofRotateX(sin(ofGetFrameNum() * 0.02) * 15);

int sample_count = 180;

for (int x = this->font_size * -3; x <= this->font_size * 3; x += this->font_size * 1.25)

{

for (int y = this->font_size * -3; y <= this->font_size * 3; y += this->font_size * 1.25) {

for (int z = this->font_size * -3; z <= this->font_size * 3; z += this->font_size * 1.25) {

ofPath path = this->font.getCharacterAsPoints(this->charactor_list[(int)ofRandom(this->charactor_list.size())], true, false);

vector<ofPolyline> outline = path.getOutline();

auto frame_param = (int)ofRandom(sample_count * 2) + ofGetFrameNum() * (int)ofRandom(2, 4);

for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

outline[outline_index] = outline[outline_index].getResampledByCount(sample_count);

vector<glm::vec3> vertices = outline[outline_index].getVertices();

ofBeginShape();

for (int vertices_index = 0; vertices_index < vertices.size(); vertices_index++) {

glm::vec3 vertex = glm::vec3(x + this->font_size * 0.25, y + this->font_size, 0) + glm::vec3(vertices[vertices_index].x, vertices[vertices_index].y, z + vertices[vertices_index].z);

if (frame_param % (sample_count * 2) < sample_count) {

if (vertices_index < frame_param % sample_count) {

ofVertex(vertex);

}

else {

if (vertices_index > frame_param % sample_count) {

ofVertex(vertex);

}

if (vertices_index == frame_param % sample_count) {

ofFill();

ofDrawSphere(vertex, 2);

ofNoFill();

}

ofEndShape();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210814

2021年8月13日2021年8月13日

Tentacle. Draw by openFrameworks

[ Video ]

[ About ]
ofIcoSphereから取得した面を外周へ伸ばしていく。

Extend the surface obtained from the ofIcoSphere to the periphery.

[ 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 base_radius;
	ofIcoSpherePrimitive ico_sphere;
	ofMesh face, frame;
};

#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 base_radius;

ofIcoSpherePrimitive ico_sphere;

ofMesh face, frame;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);
	ofEnableDepthTest();

	this->base_radius = 65;
	this->ico_sphere = ofIcoSpherePrimitive(this->base_radius, 3);
	this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
}

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

	ofSeedRandom(39);

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

	float radius_start = this->base_radius;
	float radius_max = this->base_radius * 5;
	for (auto& triangle : this->ico_sphere.getMesh().getUniqueFaces()) {

		auto noise_seed_x = ofRandom(1000);
		auto noise_seed_y = ofRandom(1000);
		auto noise_seed_z = ofRandom(1000);

		auto noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005);
		float radius_end = noise_value > 0.83 ? ofMap(noise_value, 0.83, 1, radius_start, radius_max) : radius_start;
		this->frame.addVertex(glm::vec3());

		for (float radius = radius_start; radius <= radius_end; radius += 1.5) {

			auto mesh_index = this->face.getNumVertices();
			auto frame_index = this->frame.getNumVertices();

			auto param = ofMap(radius, radius_start, radius_max, 0, PI * 0.30);

			auto angle_x = ofMap(ofNoise(noise_seed_x, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);
			auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0));
			auto angle_y = ofMap(ofNoise(noise_seed_y, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);
			auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0));
			auto angle_z = ofMap(ofNoise(noise_seed_z, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);
			auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

			glm::vec3 avg = (triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3;
			glm::vec3 location = glm::normalize(avg) * radius;

			vector<glm::vec3> vertices;
			vertices.push_back(glm::vec4(location + (triangle.getVertex(0) - avg), 0) * rotation_z * rotation_y * rotation_x);
			vertices.push_back(glm::vec4(location + (triangle.getVertex(1) - avg), 0) * rotation_z * rotation_y * rotation_x);
			vertices.push_back(glm::vec4(location + (triangle.getVertex(2) - avg), 0) * rotation_z * rotation_y * rotation_x);

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

			if (radius == radius_start || radius == radius_end) {

				this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index + 1); this->face.addIndex(mesh_index + 2);
			}

			this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index + 1);
			this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index + 2);
			this->frame.addIndex(frame_index + 2); this->frame.addIndex(frame_index + 0);

			if (radius > radius_start) {

				this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index + 1); this->face.addIndex(mesh_index - 2);
				this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index - 2); this->face.addIndex(mesh_index - 3);

				this->face.addIndex(mesh_index + 1); this->face.addIndex(mesh_index + 2); this->face.addIndex(mesh_index - 1);
				this->face.addIndex(mesh_index + 1); this->face.addIndex(mesh_index - 1); this->face.addIndex(mesh_index - 2);

				this->face.addIndex(mesh_index + 2); this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index - 3);
				this->face.addIndex(mesh_index + 2); this->face.addIndex(mesh_index - 3); this->face.addIndex(mesh_index - 1);


				this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index - 3);
				this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index - 2);
				this->frame.addIndex(frame_index + 2); this->frame.addIndex(frame_index - 1);
			}
		}
	}
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 0.25);

	ofSetColor(239);
	this->frame.drawWireframe();

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

	this->cam.end();
}

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

ofEnableDepthTest();

this->base_radius = 65;

this->ico_sphere = ofIcoSpherePrimitive(this->base_radius, 3);

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

float radius_start = this->base_radius;

float radius_max = this->base_radius * 5;

for (auto& triangle : this->ico_sphere.getMesh().getUniqueFaces()) {

auto noise_seed_x = ofRandom(1000);

auto noise_seed_y = ofRandom(1000);

auto noise_seed_z = ofRandom(1000);

auto noise_value = ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005);

float radius_end = noise_value > 0.83 ? ofMap(noise_value, 0.83, 1, radius_start, radius_max) : radius_start;

this->frame.addVertex(glm::vec3());

for (float radius = radius_start; radius <= radius_end; radius += 1.5) {

auto mesh_index = this->face.getNumVertices();

auto frame_index = this->frame.getNumVertices();

auto param = ofMap(radius, radius_start, radius_max, 0, PI * 0.30);

auto angle_x = ofMap(ofNoise(noise_seed_x, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);

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

auto angle_y = ofMap(ofNoise(noise_seed_y, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);

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

auto angle_z = ofMap(ofNoise(noise_seed_z, radius * 0.0075 + ofGetFrameNum() * 0.005), 0, 1, -param, param);

auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

glm::vec3 avg = (triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3;

glm::vec3 location = glm::normalize(avg) * radius;

vector<glm::vec3> vertices;

vertices.push_back(glm::vec4(location + (triangle.getVertex(0) - avg), 0) * rotation_z * rotation_y * rotation_x);

vertices.push_back(glm::vec4(location + (triangle.getVertex(1) - avg), 0) * rotation_z * rotation_y * rotation_x);

vertices.push_back(glm::vec4(location + (triangle.getVertex(2) - avg), 0) * rotation_z * rotation_y * rotation_x);

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

if (radius == radius_start || radius == radius_end) {

this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index + 1); this->face.addIndex(mesh_index + 2);

}

this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index + 1);

this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index + 2);

this->frame.addIndex(frame_index + 2); this->frame.addIndex(frame_index + 0);

if (radius > radius_start) {

this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index + 1); this->face.addIndex(mesh_index - 2);

this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index - 2); this->face.addIndex(mesh_index - 3);

this->face.addIndex(mesh_index + 1); this->face.addIndex(mesh_index + 2); this->face.addIndex(mesh_index - 1);

this->face.addIndex(mesh_index + 1); this->face.addIndex(mesh_index - 1); this->face.addIndex(mesh_index - 2);

this->face.addIndex(mesh_index + 2); this->face.addIndex(mesh_index + 0); this->face.addIndex(mesh_index - 3);

this->face.addIndex(mesh_index + 2); this->face.addIndex(mesh_index - 3); this->face.addIndex(mesh_index - 1);

this->frame.addIndex(frame_index + 0); this->frame.addIndex(frame_index - 3);

this->frame.addIndex(frame_index + 1); this->frame.addIndex(frame_index - 2);

this->frame.addIndex(frame_index + 2); this->frame.addIndex(frame_index - 1);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 0.25);

ofSetColor(239);

this->frame.drawWireframe();

ofSetColor(39);

this->face.draw();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210813

[ Kinako ]

2021年8月12日2021年8月12日

From inside of torus. Draw by openFrameworks

[ Video ]

[ About ]
ノイズ関数で動いているトーラス内にカメラを移動する。

Move the camera into the torus, which is moving with the noise function.

[ 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(2);
	ofEnableDepthTest();
}

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

}

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

	this->cam.begin();
	ofRotateX(90);
	ofRotateZ(ofGetFrameNum() * 3);

	int v_span = 1;
	int u_span = 30;

	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() * 0.003), 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() * 0.003), 0, 1, -360, 360);
		for (int u = u_start; u < u_start + 360; u += u_span) {

			if (flag) {

				face.addVertex(this->make_point(200, 70, u, v));
				face.addVertex(this->make_point(200, 70, u + u_span, v));
				face.addVertex(this->make_point(200, 70, next_u + u_span, v + v_span));
				face.addVertex(this->make_point(200, 70, next_u, v + v_span));

				line.addVertex(this->make_point(200, 70, u, v));
				line.addVertex(this->make_point(200, 70, u + u_span, v));
				line.addVertex(this->make_point(200, 70, next_u + u_span, v + v_span));
				line.addVertex(this->make_point(200, 70, next_u, v + v_span));

				ofColor color = ofColor(39);
				color.setHsb(ofMap(v, 0, 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(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());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetLineWidth(2);

ofEnableDepthTest();

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(90);

ofRotateZ(ofGetFrameNum() * 3);

int v_span = 1;

int u_span = 30;

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() * 0.003), 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() * 0.003), 0, 1, -360, 360);

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

if (flag) {

face.addVertex(this->make_point(200, 70, u, v));

face.addVertex(this->make_point(200, 70, u + u_span, v));

face.addVertex(this->make_point(200, 70, next_u + u_span, v + v_span));

face.addVertex(this->make_point(200, 70, next_u, v + v_span));

line.addVertex(this->make_point(200, 70, u, v));

line.addVertex(this->make_point(200, 70, u + u_span, v));

line.addVertex(this->make_point(200, 70, next_u + u_span, v + v_span));

line.addVertex(this->make_point(200, 70, next_u, v + v_span));

ofColor color = ofColor(39);

color.setHsb(ofMap(v, 0, 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(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/Insta20210812

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