openFrameworks – ページ 478 – プログラミング de 落描き

2020年5月19日2020年5月19日

Move by music. Draw by openFrameworks

[ Video ]

[ About ]
Music is analyzed and quantified. This is reflected in the amount of change in the arguments of the noise method.

[ 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) {};

	ofSoundPlayer sound;
	vector<float> fft_value;
	vector<float> fft_smoothed;
	int n_bands_to_get;

	ofEasyCam cam;
	ofIcoSpherePrimitive ico_sphere;
	ofMesh mesh, frame;
	vector<float> noise_seed_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) {};

ofSoundPlayer sound;

vector<float> fft_value;

vector<float> fft_smoothed;

int n_bands_to_get;

ofEasyCam cam;

ofIcoSpherePrimitive ico_sphere;

ofMesh mesh, frame;

vector<float> noise_seed_list;

};

#include "ofApp.h"

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

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

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

	this->sound.load("sound/This_is_Not_Jazz.mp3"); // From https://www.youtube.com/audiolibrary/
	this->sound.play();

	this->n_bands_to_get = 128;
	for (int j = 0; j < this->n_bands_to_get; j++) {

		this->fft_value.push_back(0.f);
		this->fft_smoothed.push_back(0.f);
	}

	this->ico_sphere = ofIcoSpherePrimitive(65, 2);
	this->frame.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

	for (int i = 0; i < 9; i++) {

		this->noise_seed_list.push_back(ofRandom(1000));
	}
}

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


	ofSoundUpdate();

	float* val = ofSoundGetSpectrum(this->n_bands_to_get);
	for (int i = 0; i < this->n_bands_to_get; i++) {

		this->fft_value[i] = val[i];

		this->fft_smoothed[i] *= 0.98f;
		if (this->fft_smoothed[i] < val[i]) {

			this->fft_smoothed[i] = val[i];
		}
	}

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

	auto triangle_list = this->ico_sphere.getMesh().getUniqueFaces();
	auto index = 0;
	for (int x = -200; x <= 200; x += 200) {

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

			glm::vec3 location = glm::vec3(x, y, 0);
			for (auto& triangle : triangle_list) {

				auto mesh_index = this->mesh.getNumVertices();
				auto frame_index = this->frame.getNumVertices();
				glm::vec3 avg = location + (triangle.getVertex(0) + triangle.getVertex(1) + triangle.getVertex(2)) / 3;
				auto noise_value = ofNoise(glm::vec4(avg * 0.015, this->noise_seed_list[index]));
				auto noise_radius = 0;

				if (noise_value < 0.75) {

					noise_radius = 65;
				}
				else {

					noise_radius = ofMap(noise_value, 0.75, 1.0, 65, 120);
				}

				this->mesh.addVertex(location + glm::normalize(triangle.getVertex(0)) * noise_radius);
				this->mesh.addVertex(location + glm::normalize(triangle.getVertex(1)) * noise_radius);
				this->mesh.addVertex(location + glm::normalize(triangle.getVertex(2)) * noise_radius);

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

				avg = (this->mesh.getVertex(mesh_index + 0) + this->mesh.getVertex(mesh_index + 1) + this->mesh.getVertex(mesh_index + 2)) / 3;

				this->frame.addVertex(avg);
				this->frame.addVertex(location);

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

			this->noise_seed_list[index] += ofMap(this->fft_value[index], 0, 1, 0, 0.25);
			index++;
		}
	}
}

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

	this->cam.begin();

	ofSetColor(239);
	this->mesh.draw();

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

ofSetLineWidth(1.5);

ofEnableDepthTest();

this->sound.load("sound/This_is_Not_Jazz.mp3"); // From https://www.youtube.com/audiolibrary/

this->sound.play();

this->n_bands_to_get = 128;

for (int j = 0; j < this->n_bands_to_get; j++) {

this->fft_value.push_back(0.f);

this->fft_smoothed.push_back(0.f);

}

this->ico_sphere = ofIcoSpherePrimitive(65, 2);

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

for (int i = 0; i < 9; i++) {

this->noise_seed_list.push_back(ofRandom(1000));

}

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

void ofApp::update() {

ofSoundUpdate();

float* val = ofSoundGetSpectrum(this->n_bands_to_get);

for (int i = 0; i < this->n_bands_to_get; i++) {

this->fft_value[i] = val[i];

this->fft_smoothed[i] *= 0.98f;

if (this->fft_smoothed[i] < val[i]) {

this->fft_smoothed[i] = val[i];

}

this->mesh.clear();

this->frame.clear();

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

auto index = 0;

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

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

glm::vec3 location = glm::vec3(x, y, 0);

for (auto& triangle : triangle_list) {

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

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

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

auto noise_value = ofNoise(glm::vec4(avg * 0.015, this->noise_seed_list[index]));

auto noise_radius = 0;

if (noise_value < 0.75) {

noise_radius = 65;

}

else {

noise_radius = ofMap(noise_value, 0.75, 1.0, 65, 120);

}

this->mesh.addVertex(location + glm::normalize(triangle.getVertex(0)) * noise_radius);

this->mesh.addVertex(location + glm::normalize(triangle.getVertex(1)) * noise_radius);

this->mesh.addVertex(location + glm::normalize(triangle.getVertex(2)) * noise_radius);

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

avg = (this->mesh.getVertex(mesh_index + 0) + this->mesh.getVertex(mesh_index + 1) + this->mesh.getVertex(mesh_index + 2)) / 3;

this->frame.addVertex(avg);

this->frame.addVertex(location);

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

}

this->noise_seed_list[index] += ofMap(this->fft_value[index], 0, 1, 0, 0.25);

index++;

}

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

void ofApp::draw() {

this->cam.begin();

ofSetColor(239);

this->mesh.draw();

ofSetColor(39);

this->mesh.drawWireframe();

this->frame.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200519

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2020年5月18日2020年5月18日

Face created by three points. Draw by openFrameworks

[ Video ]

[ About ]
Face created by three points.

[ 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;

	int base_radius;
	int number_of_satellite;

	vector<glm::vec3> base_noise_seed_list;
	vector<vector<glm::vec3>> satellite_location_list;
	vector<vector<glm::vec2>> satellite_noise_seed_list;
	vector<glm::vec3> location_list;
	vector<glm::vec3> velocity_list;

	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;

int base_radius;

int number_of_satellite;

vector<glm::vec3> base_noise_seed_list;

vector<vector<glm::vec3>> satellite_location_list;

vector<vector<glm::vec2>> satellite_noise_seed_list;

vector<glm::vec3> location_list;

vector<glm::vec3> velocity_list;

ofMesh face, frame;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofSetColor(255);
	ofEnableDepthTest();

	this->base_radius = 120;
	this->number_of_satellite = 2;
	for (int i = 0; i < 3; i++) {

		this->base_noise_seed_list.push_back(glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000)));

		auto s_location_list = vector<glm::vec3>();
		auto s_noise_seed_list = vector<glm::vec2>();

		for (int k = 0; k < this->number_of_satellite; k++) {

			s_location_list.push_back(glm::normalize(glm::vec3(ofRandom(-1, 1), ofRandom(-1, 1), ofRandom(-1, 1))) * this->base_radius * 1.2);
			s_noise_seed_list.push_back(glm::vec2(ofRandom(1000), ofRandom(1000)));

		}

		this->satellite_location_list.push_back(s_location_list);
		this->satellite_noise_seed_list.push_back(s_noise_seed_list);
	}

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

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


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

		auto base_location = glm::vec3(
			ofMap(ofNoise(this->base_noise_seed_list[i].x, (ofGetFrameNum() + 0) * 0.005), 0, 1, -300, 300),
			ofMap(ofNoise(this->base_noise_seed_list[i].y, (ofGetFrameNum() + 0) * 0.005), 0, 1, -300, 300),
			ofMap(ofNoise(this->base_noise_seed_list[i].z, (ofGetFrameNum() + 0) * 0.005), 0, 1, -300, 300)
		);

		for (int k = 0; k < this->number_of_satellite; k++) {

			auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(this->satellite_noise_seed_list[i][k].x, (ofGetFrameNum() + 0) * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(0, 1, 0));
			auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(this->satellite_noise_seed_list[i][k].y, (ofGetFrameNum() + 0) * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(1, 0, 0));
			auto satellite_location = glm::vec4(this->satellite_location_list[i][k], 0) * rotation_y * rotation_x;

			auto next_base_location = glm::vec3(
				ofMap(ofNoise(this->base_noise_seed_list[i].x, (ofGetFrameNum() + 1) * 0.005), 0, 1, -300, 300),
				ofMap(ofNoise(this->base_noise_seed_list[i].y, (ofGetFrameNum() + 1) * 0.005), 0, 1, -300, 300),
				ofMap(ofNoise(this->base_noise_seed_list[i].z, (ofGetFrameNum() + 1) * 0.005), 0, 1, -300, 300)
			);

			auto next_rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(this->satellite_noise_seed_list[i][k].x, (ofGetFrameNum() + 1) * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(0, 1, 0));
			auto next_rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(this->satellite_noise_seed_list[i][k].y, (ofGetFrameNum() + 1) * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(1, 0, 0));
			auto next_satellite_location = glm::vec4(this->satellite_location_list[i][k], 0) * rotation_y * rotation_x;

			auto location = base_location + satellite_location;
			auto next_location = next_base_location + next_satellite_location;
			auto distance = location - next_location;

			auto future = glm::vec3(satellite_location) + distance * 80;
			auto random_deg_1 = ofRandom(360);
			auto random_deg_2 = ofRandom(360);
			future += glm::vec3(
				30 * cos(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),
				30 * sin(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),
				30 * cos(random_deg_2 * DEG_TO_RAD)
			);
			auto future_distance = future - satellite_location;

			this->frame.addVertex(location);
			this->face.addVertex(location);

			this->frame.addColor(ofColor(255));
			this->face.addColor(ofColor(255, 64));

			this->velocity_list.push_back(glm::normalize(future_distance) * glm::length(distance));
		}
	}

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

		this->frame.setVertex(i, this->frame.getVertex(i) + this->velocity_list[i]);
		this->face.setVertex(i, this->face.getVertex(i) + this->velocity_list[i]);
	}

	for (int i = this->velocity_list.size() - 1; i >= 0; i--) {

		if (glm::length(this->frame.getVertex(i)) > 720) {

			this->velocity_list.erase(this->velocity_list.begin() + i);
			this->frame.removeVertex(i);
			this->face.removeVertex(i);
		}
	}

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

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

			auto distance = glm::distance(this->frame.getVertex(i), this->frame.getVertex(k));
			if (distance < 50) {

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

			if (distance < 80) {

				near_index_list.push_back(k);
			}
		}

		if (near_index_list.size() > 3) {
		
			for (int k = 0; k < near_index_list.size() - 2; k++) {

				this->face.addIndex(i);
				this->face.addIndex(near_index_list[k]);
				this->face.addIndex(near_index_list[k + 1]);
			}
		}
	}
}

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

	this->cam.begin();

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

		ofDrawSphere(this->frame.getVertex(i), 2);
	}

	this->frame.drawWireframe();
	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(0);

ofSetColor(255);

ofEnableDepthTest();

this->base_radius = 120;

this->number_of_satellite = 2;

for (int i = 0; i < 3; i++) {

this->base_noise_seed_list.push_back(glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000)));

auto s_location_list = vector<glm::vec3>();

auto s_noise_seed_list = vector<glm::vec2>();

for (int k = 0; k < this->number_of_satellite; k++) {

s_location_list.push_back(glm::normalize(glm::vec3(ofRandom(-1, 1), ofRandom(-1, 1), ofRandom(-1, 1))) * this->base_radius * 1.2);

s_noise_seed_list.push_back(glm::vec2(ofRandom(1000), ofRandom(1000)));

}

this->satellite_location_list.push_back(s_location_list);

this->satellite_noise_seed_list.push_back(s_noise_seed_list);

}

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

}

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

void ofApp::update() {

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

auto base_location = glm::vec3(

ofMap(ofNoise(this->base_noise_seed_list[i].x, (ofGetFrameNum() + 0) * 0.005), 0, 1, -300, 300),

ofMap(ofNoise(this->base_noise_seed_list[i].y, (ofGetFrameNum() + 0) * 0.005), 0, 1, -300, 300),

ofMap(ofNoise(this->base_noise_seed_list[i].z, (ofGetFrameNum() + 0) * 0.005), 0, 1, -300, 300)

);

for (int k = 0; k < this->number_of_satellite; k++) {

auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(this->satellite_noise_seed_list[i][k].x, (ofGetFrameNum() + 0) * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(0, 1, 0));

auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(this->satellite_noise_seed_list[i][k].y, (ofGetFrameNum() + 0) * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(1, 0, 0));

auto satellite_location = glm::vec4(this->satellite_location_list[i][k], 0) * rotation_y * rotation_x;

auto next_base_location = glm::vec3(

ofMap(ofNoise(this->base_noise_seed_list[i].x, (ofGetFrameNum() + 1) * 0.005), 0, 1, -300, 300),

ofMap(ofNoise(this->base_noise_seed_list[i].y, (ofGetFrameNum() + 1) * 0.005), 0, 1, -300, 300),

ofMap(ofNoise(this->base_noise_seed_list[i].z, (ofGetFrameNum() + 1) * 0.005), 0, 1, -300, 300)

);

auto next_rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(this->satellite_noise_seed_list[i][k].x, (ofGetFrameNum() + 1) * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(0, 1, 0));

auto next_rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(this->satellite_noise_seed_list[i][k].y, (ofGetFrameNum() + 1) * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(1, 0, 0));

auto next_satellite_location = glm::vec4(this->satellite_location_list[i][k], 0) * rotation_y * rotation_x;

auto location = base_location + satellite_location;

auto next_location = next_base_location + next_satellite_location;

auto distance = location - next_location;

auto future = glm::vec3(satellite_location) + distance * 80;

auto random_deg_1 = ofRandom(360);

auto random_deg_2 = ofRandom(360);

future += glm::vec3(

30 * cos(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),

30 * sin(random_deg_1 * DEG_TO_RAD) * sin(random_deg_2 * DEG_TO_RAD),

30 * cos(random_deg_2 * DEG_TO_RAD)

);

auto future_distance = future - satellite_location;

this->frame.addVertex(location);

this->face.addVertex(location);

this->frame.addColor(ofColor(255));

this->face.addColor(ofColor(255, 64));

this->velocity_list.push_back(glm::normalize(future_distance) * glm::length(distance));

}

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

this->frame.setVertex(i, this->frame.getVertex(i) + this->velocity_list[i]);

this->face.setVertex(i, this->face.getVertex(i) + this->velocity_list[i]);

}

for (int i = this->velocity_list.size() - 1; i >= 0; i--) {

if (glm::length(this->frame.getVertex(i)) > 720) {

this->velocity_list.erase(this->velocity_list.begin() + i);

this->frame.removeVertex(i);

this->face.removeVertex(i);

}

this->frame.clearIndices();

this->face.clearIndices();

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

vector<int> near_index_list;

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

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

if (distance < 50) {

this->frame.addIndex(i); this->frame.addIndex(k);

}

if (distance < 80) {

near_index_list.push_back(k);

}

if (near_index_list.size() > 3) {

for (int k = 0; k < near_index_list.size() - 2; k++) {

this->face.addIndex(i);

this->face.addIndex(near_index_list[k]);

this->face.addIndex(near_index_list[k + 1]);

}

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

void ofApp::draw() {

this->cam.begin();

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

ofDrawSphere(this->frame.getVertex(i), 2);

}

this->frame.drawWireframe();

this->face.draw();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200518

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2020年5月17日

Distribution of Noise Observed by Circumference. Draw by openFrameworks

[ Video ]

[ About ]
Distribution of Noise Observed by Circumference.

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

	ofBackground(239);
	ofSetColor(39);
	ofNoFill();
	ofSetLineWidth(2);
	ofEnableDepthTest();
}

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

}

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

	this->cam.begin();

	auto radius = 35;
	auto span = 100;
	auto width = 10;
	auto deg_span = 5;

	for (int x = -span * 3; x <= span * 3; x += span) {

		for (int y = -span * 3; y <= span * 3; y += span) {

			vector<glm::vec2> in_vertices, out_vertices;
			for (int deg = 0; deg < 360; deg += deg_span) {

				in_vertices.push_back(glm::vec2(x + (radius - width * 0.5) * cos(deg * DEG_TO_RAD), y + (radius - width * 0.5) * sin(deg * DEG_TO_RAD)));
				out_vertices.push_back(glm::vec2(x + (radius + width * 0.5) * cos(deg * DEG_TO_RAD), y + (radius + width * 0.5) * sin(deg * DEG_TO_RAD)));

				auto noise_location = glm::vec2(x + (radius + width * 0.5) * cos(deg * DEG_TO_RAD), y + (radius + width * 0.5) * sin(deg * DEG_TO_RAD));
				auto noise_value = ofNoise(noise_location.x * 0.005, noise_location.y * 0.005, ofGetFrameNum() * 0.02);

				if (noise_value < 0.45) {

					vector<glm::vec2> fill_vertices;
					fill_vertices.push_back(glm::vec2(x + (radius - width * 0.5) * cos(deg * DEG_TO_RAD), y + (radius - width * 0.5) * sin(deg * DEG_TO_RAD)));
					fill_vertices.push_back(glm::vec2(x + (radius - width * 0.5) * cos((deg + deg_span) * DEG_TO_RAD), y + (radius - width * 0.5) * sin((deg + deg_span) * DEG_TO_RAD)));
					fill_vertices.push_back(glm::vec2(x + (radius + width * 0.5) * cos((deg + deg_span) * DEG_TO_RAD), y + (radius + width * 0.5) * sin((deg + deg_span) * DEG_TO_RAD)));
					fill_vertices.push_back(glm::vec2(x + (radius + width * 0.5) * cos(deg * DEG_TO_RAD), y + (radius + width * 0.5) * sin(deg * DEG_TO_RAD)));

					ofFill();
					ofBeginShape();
					ofVertices(fill_vertices);
					ofEndShape(true);
				}
			}

			ofNoFill();

			ofBeginShape();
			ofVertices(in_vertices);
			ofEndShape(true);

			ofBeginShape();
			ofVertices(out_vertices);
			ofEndShape(true);
		}
	}

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(39);

ofNoFill();

ofSetLineWidth(2);

ofEnableDepthTest();

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

auto radius = 35;

auto span = 100;

auto width = 10;

auto deg_span = 5;

for (int x = -span * 3; x <= span * 3; x += span) {

for (int y = -span * 3; y <= span * 3; y += span) {

vector<glm::vec2> in_vertices, out_vertices;

for (int deg = 0; deg < 360; deg += deg_span) {

in_vertices.push_back(glm::vec2(x + (radius - width * 0.5) * cos(deg * DEG_TO_RAD), y + (radius - width * 0.5) * sin(deg * DEG_TO_RAD)));

out_vertices.push_back(glm::vec2(x + (radius + width * 0.5) * cos(deg * DEG_TO_RAD), y + (radius + width * 0.5) * sin(deg * DEG_TO_RAD)));

auto noise_location = glm::vec2(x + (radius + width * 0.5) * cos(deg * DEG_TO_RAD), y + (radius + width * 0.5) * sin(deg * DEG_TO_RAD));

auto noise_value = ofNoise(noise_location.x * 0.005, noise_location.y * 0.005, ofGetFrameNum() * 0.02);

if (noise_value < 0.45) {

vector<glm::vec2> fill_vertices;

fill_vertices.push_back(glm::vec2(x + (radius - width * 0.5) * cos(deg * DEG_TO_RAD), y + (radius - width * 0.5) * sin(deg * DEG_TO_RAD)));

fill_vertices.push_back(glm::vec2(x + (radius - width * 0.5) * cos((deg + deg_span) * DEG_TO_RAD), y + (radius - width * 0.5) * sin((deg + deg_span) * DEG_TO_RAD)));

fill_vertices.push_back(glm::vec2(x + (radius + width * 0.5) * cos((deg + deg_span) * DEG_TO_RAD), y + (radius + width * 0.5) * sin((deg + deg_span) * DEG_TO_RAD)));

fill_vertices.push_back(glm::vec2(x + (radius + width * 0.5) * cos(deg * DEG_TO_RAD), y + (radius + width * 0.5) * sin(deg * DEG_TO_RAD)));

ofFill();

ofBeginShape();

ofVertices(fill_vertices);

ofEndShape(true);

}

ofNoFill();

ofBeginShape();

ofVertices(in_vertices);

ofEndShape(true);

ofBeginShape();

ofVertices(out_vertices);

ofEndShape(true);

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200517

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