openFrameworks – ページ 388 – プログラミング de 落描き

2021年12月16日2021年12月16日

Shaving spheres. Draw by openFrameworks

[ Video ]

[ About ]
ランダムウォークで球体の面を消す。

Erase the faces of the sphere with a random walk.

[ 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(30);
	ofSetWindowTitle("openFrameworks");

	ofBackground(0);
	ofSetLineWidth(1.5);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

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

	float phi_deg_step = 5;
	float theta_deg_step = 5;

	vector<glm::vec3> noise_location_list;

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

		auto noise_location = glm::vec3(
			ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, -250, 250),
			ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, -250, 250),
			ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, -250, 250));
		noise_location_list.push_back(noise_location);
	}

	for (float radius = 50; radius <= 250; radius += 15) {

		for (float phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) {

			for (float theta_deg = 0; theta_deg <= 360; theta_deg += theta_deg_step) {

				auto location = glm::vec3(
					radius * sin(theta_deg * DEG_TO_RAD) * cos(phi_deg * DEG_TO_RAD),
					radius * sin(theta_deg * DEG_TO_RAD) * sin(phi_deg * DEG_TO_RAD),
					radius * cos(theta_deg * DEG_TO_RAD));

				bool draw_flag = true;
				for (int i = 0; i < noise_location_list.size(); i++) {

					if (glm::distance(location, noise_location_list[i]) < 100) {

						draw_flag = false;
						break;
					}
				}

				if (draw_flag) {

					auto index = this->face.getNumVertices();
					vector<glm::vec3> vertices;

					vertices.push_back(glm::vec3(
						radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
						radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
						radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));
					vertices.push_back(glm::vec3(
						radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
						radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
						radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));
					vertices.push_back(glm::vec3(
						radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
						radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),
						radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD)));
					vertices.push_back(glm::vec3(
						radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
						radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),
						radius * cos((theta_deg + theta_deg_step * 0.5) * 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 + 3);
					this->face.addIndex(index + 0); this->face.addIndex(index + 3); this->face.addIndex(index + 2);

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

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

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

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

	ofSetColor(239);
	this->frame.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(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofSetLineWidth(1.5);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->frame.clear();

float phi_deg_step = 5;

float theta_deg_step = 5;

vector<glm::vec3> noise_location_list;

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

auto noise_location = glm::vec3(

ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, -250, 250),

ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, -250, 250));

noise_location_list.push_back(noise_location);

}

for (float radius = 50; radius <= 250; radius += 15) {

for (float phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) {

for (float theta_deg = 0; theta_deg <= 360; theta_deg += theta_deg_step) {

auto location = glm::vec3(

radius * sin(theta_deg * DEG_TO_RAD) * cos(phi_deg * DEG_TO_RAD),

radius * sin(theta_deg * DEG_TO_RAD) * sin(phi_deg * DEG_TO_RAD),

radius * cos(theta_deg * DEG_TO_RAD));

bool draw_flag = true;

for (int i = 0; i < noise_location_list.size(); i++) {

if (glm::distance(location, noise_location_list[i]) < 100) {

draw_flag = false;

break;

}

if (draw_flag) {

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

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(

radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(

radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg - theta_deg_step * 0.5) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(

radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg + phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD)));

vertices.push_back(glm::vec3(

radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * cos((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * sin((theta_deg + theta_deg_step * 0.5) * DEG_TO_RAD) * sin((phi_deg - phi_deg_step * 0.5) * DEG_TO_RAD),

radius * cos((theta_deg + theta_deg_step * 0.5) * 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 + 3);

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

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

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

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

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

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(90);

ofRotateZ(ofGetFrameNum());

ofSetColor(0);

this->face.draw();

ofSetColor(239);

this->frame.draw();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20211216

2021年12月15日2021年12月15日

Fives. Draw by openFrameworks

[ Video ]

[ About ]
今日で5年間が終わり。明日から6年目。

Five years are over today. Tomorrow is the sixth year.

[ 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;
};

#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;

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openFrameworks");

	ofBackground(255);
	ofEnableDepthTest();

	this->font.loadFont("fonts/Kazesawa-Bold.ttf", 50, true, true, true);
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();
	ofRotateY(ofGetFrameNum() * 0.66666666666666666);

	auto word = "5";
	int sample_count = 200;
	vector<ofPath> word_path = this->font.getStringAsPoints(word, true, false);

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

		int x = ofRandom(-300, 300);
		int y = ofRandom(-300, 300);
		int z = ofRandom(-300, 300);
		int deg_x = ofRandom(-360, 360);
		int deg_y = ofRandom(-360, 360);
		int deg_z = ofRandom(-360, 360);

		auto translate_location = glm::normalize(glm::vec3(x, y, z)) * ofRandom(540);
		auto len = (int)(glm::length(translate_location) + ofGetFrameNum() * 2) % 540;
		translate_location = glm::normalize(translate_location) * len;

		ofPushMatrix();
		ofTranslate(translate_location);
		ofRotateZ(deg_z);
		ofRotateY(deg_y);
		ofRotateX(deg_x);

		for (int word_index = 0; word_index < word_path.size(); word_index++) {

			vector<ofPolyline> outline = word_path[word_index].getOutline();
			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();
				vector<glm::vec3> mesh_vertices;
				vector<glm::vec3> base_location_list;
				vector<glm::highp_mat4x4> rotate_vertices;

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

					auto base_location = glm::vec3(this->font.stringWidth(word) * 0.5, this->font.stringHeight(word) * 0.5, 0);
					auto location = vertices[vertices_index] - glm::vec2(this->font.stringWidth(word) * 0.5, this->font.stringHeight(word) * 0.5);

					mesh_vertices.push_back(location);
					base_location_list.push_back(base_location);
				}

				ofMesh face, line;
				line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
				for (int k = 0; k < mesh_vertices.size(); k++) {

					face.addVertex(base_location_list[k] + glm::vec3(mesh_vertices[k] - glm::vec3(0, 0, 5)));
					face.addVertex(base_location_list[k] + glm::vec3(mesh_vertices[k] + glm::vec3(0, 0, 5)));

					line.addVertex(base_location_list[k] + glm::vec3(mesh_vertices[k] - glm::vec3(0, 0, 5)));
					line.addVertex(base_location_list[k] + glm::vec3(mesh_vertices[k] + glm::vec3(0, 0, 5)));

					if (k > 0) {

						face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); face.addIndex(face.getNumVertices() - 4);
						face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 4);

						line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 3);
						line.addIndex(line.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 4);
					}
				}

				face.addIndex(face.getNumVertices() - 1); face.addIndex(0); face.addIndex(1);
				face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); face.addIndex(2);

				line.addIndex(line.getNumVertices() - 1); line.addIndex(1);
				line.addIndex(line.getNumVertices() - 2); line.addIndex(0);

				ofColor color;
				color.setHsb(ofRandom(255), 130, 255);
				ofSetColor(color);
				face.draw();

				ofSetColor(255);
				line.drawWireframe();
			}
		}

		ofPopMatrix();
	}

	this->cam.end();
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(255);

ofEnableDepthTest();

this->font.loadFont("fonts/Kazesawa-Bold.ttf", 50, true, true, true);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 0.66666666666666666);

auto word = "5";

int sample_count = 200;

vector<ofPath> word_path = this->font.getStringAsPoints(word, true, false);

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

int x = ofRandom(-300, 300);

int y = ofRandom(-300, 300);

int z = ofRandom(-300, 300);

int deg_x = ofRandom(-360, 360);

int deg_y = ofRandom(-360, 360);

int deg_z = ofRandom(-360, 360);

auto translate_location = glm::normalize(glm::vec3(x, y, z)) * ofRandom(540);

auto len = (int)(glm::length(translate_location) + ofGetFrameNum() * 2) % 540;

translate_location = glm::normalize(translate_location) * len;

ofPushMatrix();

ofTranslate(translate_location);

ofRotateZ(deg_z);

ofRotateY(deg_y);

ofRotateX(deg_x);

for (int word_index = 0; word_index < word_path.size(); word_index++) {

vector<ofPolyline> outline = word_path[word_index].getOutline();

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();

vector<glm::vec3> mesh_vertices;

vector<glm::vec3> base_location_list;

vector<glm::highp_mat4x4> rotate_vertices;

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

auto base_location = glm::vec3(this->font.stringWidth(word) * 0.5, this->font.stringHeight(word) * 0.5, 0);

auto location = vertices[vertices_index] - glm::vec2(this->font.stringWidth(word) * 0.5, this->font.stringHeight(word) * 0.5);

mesh_vertices.push_back(location);

base_location_list.push_back(base_location);

}

ofMesh face, line;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

for (int k = 0; k < mesh_vertices.size(); k++) {

face.addVertex(base_location_list[k] + glm::vec3(mesh_vertices[k] - glm::vec3(0, 0, 5)));

face.addVertex(base_location_list[k] + glm::vec3(mesh_vertices[k] + glm::vec3(0, 0, 5)));

line.addVertex(base_location_list[k] + glm::vec3(mesh_vertices[k] - glm::vec3(0, 0, 5)));

line.addVertex(base_location_list[k] + glm::vec3(mesh_vertices[k] + glm::vec3(0, 0, 5)));

if (k > 0) {

face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); face.addIndex(face.getNumVertices() - 4);

face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 3); face.addIndex(face.getNumVertices() - 4);

line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 3);

line.addIndex(line.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 4);

}

face.addIndex(face.getNumVertices() - 1); face.addIndex(0); face.addIndex(1);

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

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

line.addIndex(line.getNumVertices() - 2); line.addIndex(0);

ofColor color;

color.setHsb(ofRandom(255), 130, 255);

ofSetColor(color);

face.draw();

ofSetColor(255);

line.drawWireframe();

}

ofPopMatrix();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20211215

2021年12月14日2021年12月14日

Glitter. Draw by openFrameworks

[ Video ]

[ About ]
下の式で無限ループに。
radius = (randam + frame) % total_frame

The following formula makes it an infinite loop.
radius = (randam + frame) % total_frame

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

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

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

	ofMesh mesh;
	vector<ofColor> color_list;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofMesh mesh;

vector<ofColor> color_list;

};

#include "ofApp.h"

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

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

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

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

	ofColor color;
	int color_count = 12;
	for (int i = 0; i < color_count; i++) {

		color.setHsb(ofMap(i, 0, color_count, 0, 255), 150, 200);
		this->color_list.push_back(color);
	}
}

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

	ofSeedRandom(39);

	this->mesh.clear();

	int radius = 540;
	int span = 30;

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

		int deg_start = i % 3;
		for (int deg = deg_start; deg < deg_start + 360; deg += 3) {

			auto tmp_radius = (int)(ofRandom(radius)  + ofGetFrameNum() * 2) % radius;

			this->mesh.addVertex(glm::vec3(tmp_radius * cos(deg * DEG_TO_RAD), tmp_radius * sin(deg * DEG_TO_RAD), 0));
			this->mesh.addColor(ofColor(this->color_list[i], 0));
		}
	}

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

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

			auto distance = glm::distance(this->mesh.getVertex(i), this->mesh.getVertex(k));
			if (distance < span) {

				auto alpha = distance < span * 0.25 ? 255 : ofMap(distance, span * 0.25, span, 255, 0);

				if (this->mesh.getColor(i).a < alpha) {

					this->mesh.setColor(i, ofColor(this->mesh.getColor(i), alpha));
				}

				if (this->mesh.getColor(k).a < alpha) {

					this->mesh.setColor(k, ofColor(this->mesh.getColor(k), alpha));
				}

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

}

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

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

	this->mesh.drawWireframe();

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

		ofSetColor(this->mesh.getColor(i));
		ofDrawCircle(this->mesh.getVertex(i), 1.85);
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

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

ofColor color;

int color_count = 12;

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

color.setHsb(ofMap(i, 0, color_count, 0, 255), 150, 200);

this->color_list.push_back(color);

}

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

void ofApp::update() {

ofSeedRandom(39);

this->mesh.clear();

int radius = 540;

int span = 30;

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

int deg_start = i % 3;

for (int deg = deg_start; deg < deg_start + 360; deg += 3) {

auto tmp_radius = (int)(ofRandom(radius) + ofGetFrameNum() * 2) % radius;

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

this->mesh.addColor(ofColor(this->color_list[i], 0));

}

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

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

auto distance = glm::distance(this->mesh.getVertex(i), this->mesh.getVertex(k));

if (distance < span) {

auto alpha = distance < span * 0.25 ? 255 : ofMap(distance, span * 0.25, span, 255, 0);

if (this->mesh.getColor(i).a < alpha) {

this->mesh.setColor(i, ofColor(this->mesh.getColor(i), alpha));

}

if (this->mesh.getColor(k).a < alpha) {

this->mesh.setColor(k, ofColor(this->mesh.getColor(k), alpha));

}

this->mesh.addIndex(i);

this->mesh.addIndex(k);

}

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

void ofApp::draw() {

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

this->mesh.drawWireframe();

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

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

ofDrawCircle(this->mesh.getVertex(i), 1.85);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20211214

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