sphere – ページ 45 – プログラミング de 落描き

2020年2月28日2020年2月28日

Ribbons on sphere. openFrameworks

[ Video ]

[ About ]
球体座標上のリボン。

Ribbons on sphere.

[ 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;
	vector<glm::vec3> base_vertices;
	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;

vector<glm::vec3> base_vertices;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(1.5);
	ofEnableDepthTest();

	auto ico_sphere = ofIcoSpherePrimitive(250, 2);
	auto triangles = ico_sphere.getMesh().getUniqueFaces();

	for (auto& triangle : triangles) {

		auto avg = glm::vec3(triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3;
		this->base_vertices.push_back(avg);
	}

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

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

	ofSeedRandom(39);

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

	auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));
	auto param = glm::vec3(3.5, 0, 0);
	for (auto& vertex : this->base_vertices) {

		int start_index = this->frame.getNumVertices();
		for (int i = 0; i < 20; i++) {

			auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i) * 0.005), 0, 1, -PI, PI), glm::vec3(1, 0, 0));
			auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i) * 0.005), 0, 1, -PI, PI), glm::vec3(0, 1, 0));

			auto next_rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -PI, PI), glm::vec3(1, 0, 0));
			auto next_rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -PI, PI), glm::vec3(0, 1, 0));

			glm::vec3 tmp = glm::vec4(vertex, 0) * rotation_y * rotation_x;
			glm::vec3 next_tmp = glm::vec4(vertex, 0) * next_rotation_y * next_rotation_x;

			glm::vec3 direction = next_tmp - tmp;
			auto theta = atan2(direction.y, direction.x);
			auto tmp_rotation_x = glm::rotate(glm::mat4(), (float)(PI * 0.5), glm::vec3(1, 0, 0));
			auto tmp_rotation_y = glm::rotate(glm::mat4(), (float)(theta + PI * 0.5), glm::vec3(0, 1, 0));
			glm::vec3 tmp_param = glm::vec4(param, 0) * tmp_rotation_y * tmp_rotation_x;

			int face_index = this->face.getNumVertices() - 2;
			int frame_index = this->frame.getNumVertices() - 2;

			this->face.addVertex(tmp + tmp_param);
			this->face.addVertex(tmp - tmp_param);

			this->frame.addVertex(tmp + tmp_param);
			this->frame.addVertex(tmp - tmp_param);
			
			if (i > 0) {

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

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

		this->frame.addIndex(start_index + 0); this->frame.addIndex(start_index + 1);
		this->frame.addIndex(frame.getNumVertices() - 1); this->frame.addIndex(frame.getNumVertices() - 2);
	}
}

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

	this->cam.begin();

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

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

	this->cam.end();
}

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

	ofSetupOpenGL(1280, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetLineWidth(1.5);

ofEnableDepthTest();

auto ico_sphere = ofIcoSpherePrimitive(250, 2);

auto triangles = ico_sphere.getMesh().getUniqueFaces();

for (auto& triangle : triangles) {

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

this->base_vertices.push_back(avg);

}

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

auto param = glm::vec3(3.5, 0, 0);

for (auto& vertex : this->base_vertices) {

int start_index = this->frame.getNumVertices();

for (int i = 0; i < 20; i++) {

auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i) * 0.005), 0, 1, -PI, PI), glm::vec3(1, 0, 0));

auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i) * 0.005), 0, 1, -PI, PI), glm::vec3(0, 1, 0));

auto next_rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -PI, PI), glm::vec3(1, 0, 0));

auto next_rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -PI, PI), glm::vec3(0, 1, 0));

glm::vec3 tmp = glm::vec4(vertex, 0) * rotation_y * rotation_x;

glm::vec3 next_tmp = glm::vec4(vertex, 0) * next_rotation_y * next_rotation_x;

glm::vec3 direction = next_tmp - tmp;

auto theta = atan2(direction.y, direction.x);

auto tmp_rotation_x = glm::rotate(glm::mat4(), (float)(PI * 0.5), glm::vec3(1, 0, 0));

auto tmp_rotation_y = glm::rotate(glm::mat4(), (float)(theta + PI * 0.5), glm::vec3(0, 1, 0));

glm::vec3 tmp_param = glm::vec4(param, 0) * tmp_rotation_y * tmp_rotation_x;

int face_index = this->face.getNumVertices() - 2;

int frame_index = this->frame.getNumVertices() - 2;

this->face.addVertex(tmp + tmp_param);

this->face.addVertex(tmp - tmp_param);

this->frame.addVertex(tmp + tmp_param);

this->frame.addVertex(tmp - tmp_param);

if (i > 0) {

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

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

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

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

}

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

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

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(39);

this->face.draw();

ofSetColor(239);

this->frame.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(1280, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200228

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2020年2月26日2020年2月26日

Ring Ring Ring. openFrameworks

[ Video ]

[ About ]
環の球体

Ring on sphere.

[ 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;
	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;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();

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

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

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

	int radius = 300;
	int theta_start = (int)(ofGetFrameNum() * 0.5) % 10;
	for (int theta = theta_start; theta < theta_start + 180; theta += 10) {

		for (int phi = 0; phi < 360; phi += 1) {

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

			vector<glm::vec3> vertices;

			vertices.push_back(glm::vec3(
				radius * cos(phi * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),
				radius * sin(phi * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),
				radius * cos((theta + 1) * DEG_TO_RAD)
			));
			vertices.push_back(glm::vec3(
				radius * cos((phi + 1) * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),
				radius * sin((phi + 1) * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),
				radius * cos((theta + 1) * DEG_TO_RAD)
			));
			vertices.push_back(glm::vec3(
				radius * cos((phi + 1) * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),
				radius * sin((phi + 1) * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),
				radius * cos((theta - 1) * DEG_TO_RAD)
			));
			vertices.push_back(glm::vec3(
				radius * cos(phi * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),
				radius * sin(phi * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),
				radius * cos((theta - 1) * DEG_TO_RAD)
			));

			vertices.push_back(glm::vec3(
				(radius - 30) * cos(phi * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),
				(radius - 30) * sin(phi * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),
				radius * cos((theta + 1) * DEG_TO_RAD)
			));
			vertices.push_back(glm::vec3(
				(radius - 30) * cos((phi + 1) * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),
				(radius - 30) * sin((phi + 1) * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),
				radius * cos((theta + 1) * DEG_TO_RAD)
			));
			vertices.push_back(glm::vec3(
				(radius - 30) * cos((phi + 1) * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),
				(radius - 30) * sin((phi + 1) * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),
				radius * cos((theta - 1) * DEG_TO_RAD)
			));
			vertices.push_back(glm::vec3(
				(radius - 30) * cos(phi * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),
				(radius - 30) * sin(phi * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),
				radius * cos((theta - 1) * DEG_TO_RAD)
			));

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

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

			this->face.addIndex(index + 4); this->face.addIndex(index + 5); this->face.addIndex(index + 6);
			this->face.addIndex(index + 4); this->face.addIndex(index + 6); this->face.addIndex(index + 7);

			this->face.addIndex(index + 0); this->face.addIndex(index + 4); this->face.addIndex(index + 5);
			this->face.addIndex(index + 0); this->face.addIndex(index + 5); this->face.addIndex(index + 1);

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

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

			this->frame.addIndex(index + 4); this->frame.addIndex(index + 5);
			this->frame.addIndex(index + 6); this->frame.addIndex(index + 7);

		}
	}
}


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

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

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

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

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

}

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

void ofApp::update() {

this->face.clear();

this->frame.clear();

int radius = 300;

int theta_start = (int)(ofGetFrameNum() * 0.5) % 10;

for (int theta = theta_start; theta < theta_start + 180; theta += 10) {

for (int phi = 0; phi < 360; phi += 1) {

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

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(

radius * cos(phi * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),

radius * sin(phi * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),

radius * cos((theta + 1) * DEG_TO_RAD)

));

vertices.push_back(glm::vec3(

radius * cos((phi + 1) * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),

radius * sin((phi + 1) * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),

radius * cos((theta + 1) * DEG_TO_RAD)

));

vertices.push_back(glm::vec3(

radius * cos((phi + 1) * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),

radius * sin((phi + 1) * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),

radius * cos((theta - 1) * DEG_TO_RAD)

));

vertices.push_back(glm::vec3(

radius * cos(phi * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),

radius * sin(phi * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),

radius * cos((theta - 1) * DEG_TO_RAD)

));

vertices.push_back(glm::vec3(

(radius - 30) * cos(phi * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),

(radius - 30) * sin(phi * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),

radius * cos((theta + 1) * DEG_TO_RAD)

));

vertices.push_back(glm::vec3(

(radius - 30) * cos((phi + 1) * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),

(radius - 30) * sin((phi + 1) * DEG_TO_RAD) * sin((theta + 1) * DEG_TO_RAD),

radius * cos((theta + 1) * DEG_TO_RAD)

));

vertices.push_back(glm::vec3(

(radius - 30) * cos((phi + 1) * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),

(radius - 30) * sin((phi + 1) * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),

radius * cos((theta - 1) * DEG_TO_RAD)

));

vertices.push_back(glm::vec3(

(radius - 30) * cos(phi * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),

(radius - 30) * sin(phi * DEG_TO_RAD) * sin((theta - 1) * DEG_TO_RAD),

radius * cos((theta - 1) * DEG_TO_RAD)

));

this->face.addVertices(vertices);

this->frame.addVertices(vertices);

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

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

this->face.addIndex(index + 4); this->face.addIndex(index + 5); this->face.addIndex(index + 6);

this->face.addIndex(index + 4); this->face.addIndex(index + 6); this->face.addIndex(index + 7);

this->face.addIndex(index + 0); this->face.addIndex(index + 4); this->face.addIndex(index + 5);

this->face.addIndex(index + 0); this->face.addIndex(index + 5); this->face.addIndex(index + 1);

this->face.addIndex(index + 2); this->face.addIndex(index + 6); this->face.addIndex(index + 7);

this->face.addIndex(index + 2); this->face.addIndex(index + 7); this->face.addIndex(index + 3);

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

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

this->frame.addIndex(index + 4); this->frame.addIndex(index + 5);

this->frame.addIndex(index + 6); this->frame.addIndex(index + 7);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(270);

ofSetColor(39);

this->face.draw();

ofSetColor(239);

this->frame.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200226

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2020年2月24日2020年2月23日

Disjointed sphere. openFrameworks

[ Video ]

[ About ]
ばらばら球体。

Disjointed sphere.

[ 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;
	ofIcoSpherePrimitive ico_sphere;
	ofMesh mesh, 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;

ofIcoSpherePrimitive ico_sphere;

ofMesh mesh, frame;

};

#include "ofApp.h"

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

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

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

	this->ico_sphere = ofIcoSpherePrimitive(300, 3);
	this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
}

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

	this->mesh.clear();
	this->frame.clear();
	auto triangle_list = this->ico_sphere.getMesh().getUniqueFaces();

	for (auto& triangle : triangle_list) {

		auto index = this->mesh.getNumVertices();
		glm::vec3 avg = (triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3;
		auto noise_value = ofNoise(glm::vec4(avg * 0.01, ofGetFrameNum() * 0.005));
		
		auto noise_radius = 100;
		if (noise_value > 0.7) { noise_radius = ofMap(noise_value, 0.7, 1, 100, 350); }

		vector<glm::vec3> vertices;

		vertices.push_back(glm::normalize(triangle.getVertex(0)) * (noise_radius + 20));
		vertices.push_back(glm::normalize(triangle.getVertex(1)) * (noise_radius + 20));
		vertices.push_back(glm::normalize(triangle.getVertex(2)) * (noise_radius + 20));

		vertices.push_back(glm::normalize(triangle.getVertex(0)) * (noise_radius - 20));
		vertices.push_back(glm::normalize(triangle.getVertex(1)) * (noise_radius - 20));
		vertices.push_back(glm::normalize(triangle.getVertex(2)) * (noise_radius - 20));

		mesh.addVertices(vertices);
		frame.addVertices(vertices);

		mesh.addIndex(index + 0); mesh.addIndex(index + 1); mesh.addIndex(index + 2);
		mesh.addIndex(index + 3); mesh.addIndex(index + 4); mesh.addIndex(index + 5);

		mesh.addIndex(index + 0); mesh.addIndex(index + 3); mesh.addIndex(index + 4);
		mesh.addIndex(index + 0); mesh.addIndex(index + 4); mesh.addIndex(index + 1);

		mesh.addIndex(index + 1); mesh.addIndex(index + 4); mesh.addIndex(index + 5);
		mesh.addIndex(index + 1); mesh.addIndex(index + 5); mesh.addIndex(index + 2);
		
		mesh.addIndex(index + 2); mesh.addIndex(index + 5); mesh.addIndex(index + 3);
		mesh.addIndex(index + 2); mesh.addIndex(index + 3); mesh.addIndex(index + 0);

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

		frame.addIndex(index + 3); frame.addIndex(index + 4);
		frame.addIndex(index + 4); frame.addIndex(index + 5);
		frame.addIndex(index + 5); frame.addIndex(index + 3);

		frame.addIndex(index + 0); frame.addIndex(index + 3);
		frame.addIndex(index + 1); frame.addIndex(index + 4);
		frame.addIndex(index + 2); frame.addIndex(index + 5);
	}
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 0.5);

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

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

	this->cam.end();
}

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

	ofSetupOpenGL(1280, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetLineWidth(2);

ofEnableDepthTest();

this->ico_sphere = ofIcoSpherePrimitive(300, 3);

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

}

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

void ofApp::update() {

this->mesh.clear();

this->frame.clear();

auto triangle_list = this->ico_sphere.getMesh().getUniqueFaces();

for (auto& triangle : triangle_list) {

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

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

auto noise_value = ofNoise(glm::vec4(avg * 0.01, ofGetFrameNum() * 0.005));

auto noise_radius = 100;

if (noise_value > 0.7) { noise_radius = ofMap(noise_value, 0.7, 1, 100, 350); }

vector<glm::vec3> vertices;

vertices.push_back(glm::normalize(triangle.getVertex(0)) * (noise_radius + 20));

vertices.push_back(glm::normalize(triangle.getVertex(1)) * (noise_radius + 20));

vertices.push_back(glm::normalize(triangle.getVertex(2)) * (noise_radius + 20));

vertices.push_back(glm::normalize(triangle.getVertex(0)) * (noise_radius - 20));

vertices.push_back(glm::normalize(triangle.getVertex(1)) * (noise_radius - 20));

vertices.push_back(glm::normalize(triangle.getVertex(2)) * (noise_radius - 20));

mesh.addVertices(vertices);

frame.addVertices(vertices);

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

mesh.addIndex(index + 3); mesh.addIndex(index + 4); mesh.addIndex(index + 5);

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

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

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

mesh.addIndex(index + 1); mesh.addIndex(index + 5); mesh.addIndex(index + 2);

mesh.addIndex(index + 2); mesh.addIndex(index + 5); mesh.addIndex(index + 3);

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

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

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

frame.addIndex(index + 2); frame.addIndex(index + 0);

frame.addIndex(index + 3); frame.addIndex(index + 4);

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

frame.addIndex(index + 5); frame.addIndex(index + 3);

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

frame.addIndex(index + 1); frame.addIndex(index + 4);

frame.addIndex(index + 2); frame.addIndex(index + 5);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 0.5);

ofSetColor(39);

this->mesh.draw();

ofSetColor(239);

this->frame.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(1280, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200224

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