programming – ページ 40 – プログラミング de 落描き

2023年5月20日

Ring Tunnel. Draw by openFrameworks

[ Video ]

[ About ]
トンネル。

[ 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, line;
};

#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, line;

};

#include "ofApp.h"

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

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

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

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

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

	ofSeedRandom(39);

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

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

	float threshold_1 = 0.4;
	float threshold_2 = 0.6;
	float deg_span = 0.25;
	float z_span = 1;

	float radius = 320;
	float noise_span = 0.005;

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

		for (float z = -300; z < 4096; z += z_span) {

			auto noise_value = ofNoise(glm::vec3(radius * cos(deg * DEG_TO_RAD) * noise_span, radius * sin(deg * DEG_TO_RAD) * noise_span, z * noise_span + ofGetFrameNum() * 0.075));
			if (noise_value <= threshold_1 || noise_value >= threshold_2) { continue; }

			auto noise_1 = ofNoise(glm::vec3(radius * cos((deg - deg_span) * DEG_TO_RAD) * noise_span, radius * sin((deg - deg_span) * DEG_TO_RAD) * noise_span, z * noise_span + ofGetFrameNum() * 0.075));
			auto noise_2 = ofNoise(glm::vec3(radius * cos(deg * DEG_TO_RAD) * noise_span, radius * sin(deg * DEG_TO_RAD) * noise_span, (z + z_span) * noise_span + ofGetFrameNum() * 0.075));
			auto noise_3 = ofNoise(glm::vec3(radius * cos(deg * DEG_TO_RAD) * noise_span, radius * sin(deg * DEG_TO_RAD) * noise_span, (z - z_span) * noise_span + ofGetFrameNum() * 0.075));
			auto noise_4 = ofNoise(glm::vec3(radius * cos((deg + deg_span) * DEG_TO_RAD) * noise_span, radius * sin((deg + deg_span) * DEG_TO_RAD) * noise_span, z * noise_span + ofGetFrameNum() * 0.075));

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

			vertices.push_back(glm::vec3(radius * cos((deg - deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg - deg_span * 0.5) * DEG_TO_RAD), z - z_span * 0.5));
			vertices.push_back(glm::vec3(radius * cos((deg + deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg + deg_span * 0.5) * DEG_TO_RAD), z - z_span * 0.5));
			vertices.push_back(glm::vec3(radius * cos((deg - deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg - deg_span * 0.5) * DEG_TO_RAD), z + z_span * 0.5));
			vertices.push_back(glm::vec3(radius * cos((deg + deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg + deg_span * 0.5) * DEG_TO_RAD), z + z_span * 0.5));

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

			if (noise_1 <= threshold_1 || noise_1 >= threshold_2) {

				this->line.addVertex(vertices[0]);
				this->line.addVertex(vertices[2]);

				this->line.addIndex(this->line.getNumVertices() - 1);
				this->line.addIndex(this->line.getNumVertices() - 2);
			}

			if (noise_2 <= threshold_1 || noise_2 >= threshold_2) {

				this->line.addVertex(vertices[2]);
				this->line.addVertex(vertices[3]);

				this->line.addIndex(this->line.getNumVertices() - 1);
				this->line.addIndex(this->line.getNumVertices() - 2);
			}

			if (noise_3 <= threshold_1 || noise_3 >= threshold_2) {

				this->line.addVertex(vertices[0]);
				this->line.addVertex(vertices[1]);

				this->line.addIndex(this->line.getNumVertices() - 1);
				this->line.addIndex(this->line.getNumVertices() - 2);
			}

			if (noise_4 <= threshold_1 || noise_4 >= threshold_2) {

				this->line.addVertex(vertices[1]);
				this->line.addVertex(vertices[3]);

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

			}
		}
	}
}

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

	this->cam.begin();
	ofRotateY(180);

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

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

	/*
	ostringstream os;
	os << setw(4) << setfill('0') << ofGetFrameNum() + 1;
	ofImage image;
	image.grabScreen(0, 0, ofGetWidth(), ofGetHeight());
	image.saveImage("image/img_" + os.str() + ".jpg");
	if (ofGetFrameNum() + 1 >= 24 * 20) {

		std::exit(1);
	}
	*/

	// > ffmpeg -i img_%04d.jpg -r 30 out.mp4


	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(239);

ofSetLineWidth(2);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

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

this->face.clear();

this->line.clear();

float threshold_1 = 0.4;

float threshold_2 = 0.6;

float deg_span = 0.25;

float z_span = 1;

float radius = 320;

float noise_span = 0.005;

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

for (float z = -300; z < 4096; z += z_span) {

auto noise_value = ofNoise(glm::vec3(radius * cos(deg * DEG_TO_RAD) * noise_span, radius * sin(deg * DEG_TO_RAD) * noise_span, z * noise_span + ofGetFrameNum() * 0.075));

if (noise_value <= threshold_1 || noise_value >= threshold_2) { continue; }

auto noise_1 = ofNoise(glm::vec3(radius * cos((deg - deg_span) * DEG_TO_RAD) * noise_span, radius * sin((deg - deg_span) * DEG_TO_RAD) * noise_span, z * noise_span + ofGetFrameNum() * 0.075));

auto noise_2 = ofNoise(glm::vec3(radius * cos(deg * DEG_TO_RAD) * noise_span, radius * sin(deg * DEG_TO_RAD) * noise_span, (z + z_span) * noise_span + ofGetFrameNum() * 0.075));

auto noise_3 = ofNoise(glm::vec3(radius * cos(deg * DEG_TO_RAD) * noise_span, radius * sin(deg * DEG_TO_RAD) * noise_span, (z - z_span) * noise_span + ofGetFrameNum() * 0.075));

auto noise_4 = ofNoise(glm::vec3(radius * cos((deg + deg_span) * DEG_TO_RAD) * noise_span, radius * sin((deg + deg_span) * DEG_TO_RAD) * noise_span, z * noise_span + ofGetFrameNum() * 0.075));

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

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(radius * cos((deg - deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg - deg_span * 0.5) * DEG_TO_RAD), z - z_span * 0.5));

vertices.push_back(glm::vec3(radius * cos((deg + deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg + deg_span * 0.5) * DEG_TO_RAD), z - z_span * 0.5));

vertices.push_back(glm::vec3(radius * cos((deg - deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg - deg_span * 0.5) * DEG_TO_RAD), z + z_span * 0.5));

vertices.push_back(glm::vec3(radius * cos((deg + deg_span * 0.5) * DEG_TO_RAD), radius * sin((deg + deg_span * 0.5) * DEG_TO_RAD), z + z_span * 0.5));

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

if (noise_1 <= threshold_1 || noise_1 >= threshold_2) {

this->line.addVertex(vertices[0]);

this->line.addVertex(vertices[2]);

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

this->line.addIndex(this->line.getNumVertices() - 2);

}

if (noise_2 <= threshold_1 || noise_2 >= threshold_2) {

this->line.addVertex(vertices[2]);

this->line.addVertex(vertices[3]);

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

this->line.addIndex(this->line.getNumVertices() - 2);

}

if (noise_3 <= threshold_1 || noise_3 >= threshold_2) {

this->line.addVertex(vertices[0]);

this->line.addVertex(vertices[1]);

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

this->line.addIndex(this->line.getNumVertices() - 2);

}

if (noise_4 <= threshold_1 || noise_4 >= threshold_2) {

this->line.addVertex(vertices[1]);

this->line.addVertex(vertices[3]);

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

this->line.addIndex(this->line.getNumVertices() - 2);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(180);

ofSetColor(0);

this->line.draw();

ofSetColor(39);

this->face.draw();

ostringstream os;

os << setw(4) << setfill('0') << ofGetFrameNum() + 1;

ofImage image;

image.grabScreen(0, 0, ofGetWidth(), ofGetHeight());

image.saveImage("image/img_" + os.str() + ".jpg");

if (ofGetFrameNum() + 1 >= 24 * 20) {

std::exit(1);

}

// > ffmpeg -i img_%04d.jpg -r 30 out.mp4

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230520

2023年5月19日

Color switch. Draw by openFrameworks

[ Video ]

[ About ]
色の切り替え。

[ 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) {};
};

#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) {};

};

#include "ofApp.h"

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

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

	ofNoFill();
}

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

	ofSeedRandom(39);
}

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

	float back_color_value, color_value;

	if (ofGetFrameNum() % 240 < 120) {

		back_color_value = ofMap(ofGetFrameNum() % 240, 0, 120, 239, 39);
		color_value = ofMap(ofGetFrameNum() % 240, 0, 120, 39, 239);
	}
	else {

		back_color_value = ofMap(ofGetFrameNum() % 240, 120, 240, 39, 239);
		color_value = ofMap(ofGetFrameNum() % 240, 120, 240, 239, 39);
	}

	ofBackground(ofColor(back_color_value));
	ofColor color(color_value);

	for (int k = 0; k < 35; k++) {

		ofMesh mesh;
		vector<glm::vec3> right, left, frame;

		auto x = ofRandom(50, ofGetWindowWidth() - 50);
		auto base_y = ofRandom(ofGetWindowHeight());
		auto speed = ofRandom(5, 20);
		float head_size = 9;
		glm::vec3 last_location;
		float last_theta;

		for (int i = 0; i < 25; i++) {

			auto location = glm::vec3(x, (int)(base_y + (ofGetFrameNum() + i) * speed) % 1220 - 200, 0);
			auto next = glm::vec3(x, (int)(base_y + (ofGetFrameNum() + i + 1) * speed) % 1220 - 200, 0);

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

			right.push_back(location + glm::vec3(ofMap(i, 0, 25, 0, head_size) * cos(theta + PI * 0.5), ofMap(i, 0, 25, 0, head_size) * sin(theta + PI * 0.5), 0));
			left.push_back(location + glm::vec3(ofMap(i, 0, 25, 0, head_size) * cos(theta - PI * 0.5), ofMap(i, 0, 25, 0, head_size) * sin(theta - PI * 0.5), 0));

			last_location = location;
			last_theta = theta;
		}

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

			mesh.addVertex(left[i]);
			mesh.addVertex(right[i]);

			mesh.addColor(ofColor(color, ofMap(i, 0, right.size(), 0, 255)));
			mesh.addColor(ofColor(color, ofMap(i, 0, right.size(), 0, 255)));
		}

		for (int i = 0; i < mesh.getNumVertices() - 2; i += 2) {

			mesh.addIndex(i + 0); mesh.addIndex(i + 1); mesh.addIndex(i + 3);
			mesh.addIndex(i + 0); mesh.addIndex(i + 2); mesh.addIndex(i + 3);
		}

		auto tmp_head_size = ofMap(mesh.getNumVertices() - 2, 0, mesh.getNumVertices() - 2, 0, head_size);
		tmp_head_size = head_size;

		mesh.addVertex(last_location);
		mesh.addColor(color);
		int index = mesh.getNumVertices();
		for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 10) {

			mesh.addVertex(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0));
			mesh.addColor(color);
			frame.push_back(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0));
		}

		for (int i = index; i < mesh.getNumVertices() - 1; i++) {

			mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1);
		}

		mesh.draw();
	}
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofNoFill();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

float back_color_value, color_value;

if (ofGetFrameNum() % 240 < 120) {

back_color_value = ofMap(ofGetFrameNum() % 240, 0, 120, 239, 39);

color_value = ofMap(ofGetFrameNum() % 240, 0, 120, 39, 239);

}

else {

back_color_value = ofMap(ofGetFrameNum() % 240, 120, 240, 39, 239);

color_value = ofMap(ofGetFrameNum() % 240, 120, 240, 239, 39);

}

ofBackground(ofColor(back_color_value));

ofColor color(color_value);

for (int k = 0; k < 35; k++) {

ofMesh mesh;

vector<glm::vec3> right, left, frame;

auto x = ofRandom(50, ofGetWindowWidth() - 50);

auto base_y = ofRandom(ofGetWindowHeight());

auto speed = ofRandom(5, 20);

float head_size = 9;

glm::vec3 last_location;

float last_theta;

for (int i = 0; i < 25; i++) {

auto location = glm::vec3(x, (int)(base_y + (ofGetFrameNum() + i) * speed) % 1220 - 200, 0);

auto next = glm::vec3(x, (int)(base_y + (ofGetFrameNum() + i + 1) * speed) % 1220 - 200, 0);

auto direction = next - location;

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

right.push_back(location + glm::vec3(ofMap(i, 0, 25, 0, head_size) * cos(theta + PI * 0.5), ofMap(i, 0, 25, 0, head_size) * sin(theta + PI * 0.5), 0));

left.push_back(location + glm::vec3(ofMap(i, 0, 25, 0, head_size) * cos(theta - PI * 0.5), ofMap(i, 0, 25, 0, head_size) * sin(theta - PI * 0.5), 0));

last_location = location;

last_theta = theta;

}

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

mesh.addVertex(left[i]);

mesh.addVertex(right[i]);

mesh.addColor(ofColor(color, ofMap(i, 0, right.size(), 0, 255)));

}

for (int i = 0; i < mesh.getNumVertices() - 2; i += 2) {

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

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

}

auto tmp_head_size = ofMap(mesh.getNumVertices() - 2, 0, mesh.getNumVertices() - 2, 0, head_size);

tmp_head_size = head_size;

mesh.addVertex(last_location);

mesh.addColor(color);

int index = mesh.getNumVertices();

for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 10) {

mesh.addVertex(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0));

mesh.addColor(color);

frame.push_back(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0));

}

for (int i = index; i < mesh.getNumVertices() - 1; i++) {

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

}

mesh.draw();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230519/

2023年5月18日

Heartful. Draw by openFrameworks

[ Video ]

[ About ]
ハートフル。

[ 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::vec2 make_point(float theta);

	float random_seed;
};

#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::vec2 make_point(float theta);

float random_seed;

};

#include "ofApp.h"	

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

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

	ofBackground(39);
	ofSetLineWidth(3);
}

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

	if (ofGetFrameNum() % 90 == 0) {

		this->random_seed = ofRandom(1000);
	}

	ofSeedRandom(this->random_seed);
}

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

	ofColor color;
	for (int i = 0; i < 360; i++) {

		auto location = glm::vec2(ofRandom(0, ofGetWindowWidth()), ofRandom(0, ofGetWindowHeight()));
		location += glm::vec2(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, -30, 30), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, -30, 30));
		auto scale = ofRandom(3, 8);
		color.setHsb(ofRandom(255), 80, 255);

		ofPushMatrix();
		ofTranslate(location);
		ofRotate(ofRandom(-45, 45));

		ofFill();
		ofSetColor(color);
		ofBeginShape();
		for (int deg = 0; deg < 360; deg++) {

			ofVertex(this->make_point(deg * DEG_TO_RAD) * scale);
		}
		ofEndShape(true);

		color.setSaturation(255);

		ofNoFill();
		ofSetColor(color);
		ofBeginShape();
		for (int deg = 0; deg < 360; deg++) {

			ofVertex(this->make_point(deg * DEG_TO_RAD) * scale);
		}
		ofEndShape(true);

		ofPopMatrix();
	}
}

//--------------------------------------------------------------
// Reference by https://twitter.com/shiffman/status/1095764239665512453
glm::vec2 ofApp::make_point(float theta) {

	float x = 16 * (pow(sin(theta), 3));
	float y = 13 * cos(theta) - 5 * cos(2 * theta) - 2 * cos(3 * theta) - cos(4 * theta);
	return glm::vec2(x, -y);
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(39);

ofSetLineWidth(3);

}

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

void ofApp::update() {

if (ofGetFrameNum() % 90 == 0) {

this->random_seed = ofRandom(1000);

}

ofSeedRandom(this->random_seed);

}

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

void ofApp::draw() {

ofColor color;

for (int i = 0; i < 360; i++) {

auto location = glm::vec2(ofRandom(0, ofGetWindowWidth()), ofRandom(0, ofGetWindowHeight()));

location += glm::vec2(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, -30, 30), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, -30, 30));

auto scale = ofRandom(3, 8);

color.setHsb(ofRandom(255), 80, 255);

ofPushMatrix();

ofTranslate(location);

ofRotate(ofRandom(-45, 45));

ofFill();

ofSetColor(color);

ofBeginShape();

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

ofVertex(this->make_point(deg * DEG_TO_RAD) * scale);

}

ofEndShape(true);

color.setSaturation(255);

ofNoFill();

ofSetColor(color);

ofBeginShape();

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

ofVertex(this->make_point(deg * DEG_TO_RAD) * scale);

}

ofEndShape(true);

ofPopMatrix();

}

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

// Reference by https://twitter.com/shiffman/status/1095764239665512453

glm::vec2 ofApp::make_point(float theta) {

float x = 16 * (pow(sin(theta), 3));

float y = 13 * cos(theta) - 5 * cos(2 * theta) - 2 * cos(3 * theta) - cos(4 * theta);

return glm::vec2(x, -y);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230518

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