RandomWalk – ページ 76 – プログラミング de 落描き

2020年7月23日2020年7月23日

Random Walker generating rings. Draw by openFrameworks

[ Video ]

[ About ]
輪っかを生成ランダムウォーク。

Random Walker generating rings.

[ 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> ripple_location_list;
	vector<float> ripple_radius_list;
	vector<float> ripple_param_list;
	vector<float> ripple_theta_list;
	vector<float> ripple_life_list;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofEasyCam cam;

vector<glm::vec3> ripple_location_list;

vector<float> ripple_radius_list;

vector<float> ripple_param_list;

vector<float> ripple_theta_list;

vector<float> ripple_life_list;

};

#include "ofApp.h"

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

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

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

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	for (int k = 0; k < 8; k++) {

		auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));
		vector<glm::vec3> log_list;
		for (int i = 0; i < 30; i++) {

			auto location = glm::vec3(
				ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i) * 0.005), 0, 1, -350, 350),
				ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i) * 0.005), 0, 1, -350, 350),
				0);

			log_list.push_back(location);
		}

		if (ofGetFrameNum() % 10 == 0) {

			auto direction = log_list[log_list.size() - 1] - log_list[log_list.size() - 2];
			auto theta = atan2(direction.y, direction.x);
			auto param = glm::length(direction) * 0.5;

			this->ripple_location_list.push_back(log_list[log_list.size() - 1]);
			this->ripple_radius_list.push_back(0);
			this->ripple_param_list.push_back(param);
			this->ripple_theta_list.push_back(theta);
			this->ripple_life_list.push_back(255);
		}

		ofNoFill();
		for (int i = log_list.size() - 1; i > 0; i--) {

			ofSetColor(ofMap(i, 0, log_list.size(), 239, 39));
			ofDrawLine(log_list[i], log_list[i - 1]);
		}

		ofFill();
		ofSetColor(39);
		ofDrawSphere(log_list[log_list.size() - 1], 2);
	}

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

		this->ripple_radius_list[i] += this->ripple_param_list[i];
		this->ripple_life_list[i] -= 10;

		if (this->ripple_life_list[i] < 0) {

			this->ripple_location_list.erase(this->ripple_location_list.begin() + i);
			this->ripple_radius_list.erase(this->ripple_radius_list.begin() + i);
			this->ripple_param_list.erase(this->ripple_param_list.begin() + i);
			this->ripple_theta_list.erase(this->ripple_theta_list.begin() + i);
			this->ripple_life_list.erase(this->ripple_life_list.begin() + i);

			continue;
		}

		ofNoFill();
		ofSetColor(ofMap(this->ripple_life_list[i], 0, 255, 239, 39));
		ofBeginShape();
		for (int deg = 0; deg < 360; deg += 3) {

			auto vertex = glm::vec3(this->ripple_radius_list[i] * cos(deg * DEG_TO_RAD), this->ripple_radius_list[i] * sin(deg * DEG_TO_RAD), 0);
			auto rotation_x = glm::rotate(glm::mat4(), (float)(PI * 0.5), glm::vec3(1, 0, 0));
			auto rotation_y = glm::rotate(glm::mat4(), (float)(this->ripple_theta_list[i] + PI * 0.5), glm::vec3(0, 1, 0));
			vertex = this->ripple_location_list[i] + glm::vec4(vertex, 0) * rotation_y * rotation_x;

			ofVertex(vertex);
		}
		ofEndShape(true);
	}

	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(2);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

for (int k = 0; k < 8; k++) {

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

vector<glm::vec3> log_list;

for (int i = 0; i < 30; i++) {

auto location = glm::vec3(

ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i) * 0.005), 0, 1, -350, 350),

ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i) * 0.005), 0, 1, -350, 350),

0);

log_list.push_back(location);

}

if (ofGetFrameNum() % 10 == 0) {

auto direction = log_list[log_list.size() - 1] - log_list[log_list.size() - 2];

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

auto param = glm::length(direction) * 0.5;

this->ripple_location_list.push_back(log_list[log_list.size() - 1]);

this->ripple_radius_list.push_back(0);

this->ripple_param_list.push_back(param);

this->ripple_theta_list.push_back(theta);

this->ripple_life_list.push_back(255);

}

ofNoFill();

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

ofSetColor(ofMap(i, 0, log_list.size(), 239, 39));

ofDrawLine(log_list[i], log_list[i - 1]);

}

ofFill();

ofSetColor(39);

ofDrawSphere(log_list[log_list.size() - 1], 2);

}

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

this->ripple_radius_list[i] += this->ripple_param_list[i];

this->ripple_life_list[i] -= 10;

if (this->ripple_life_list[i] < 0) {

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

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

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

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

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

continue;

}

ofNoFill();

ofSetColor(ofMap(this->ripple_life_list[i], 0, 255, 239, 39));

ofBeginShape();

for (int deg = 0; deg < 360; deg += 3) {

auto vertex = glm::vec3(this->ripple_radius_list[i] * cos(deg * DEG_TO_RAD), this->ripple_radius_list[i] * sin(deg * DEG_TO_RAD), 0);

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

auto rotation_y = glm::rotate(glm::mat4(), (float)(this->ripple_theta_list[i] + PI * 0.5), glm::vec3(0, 1, 0));

vertex = this->ripple_location_list[i] + glm::vec4(vertex, 0) * rotation_y * rotation_x;

ofVertex(vertex);

}

ofEndShape(true);

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200723

[ほしいものリスト]
Amazon

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2020年7月14日

Change the color over time. Draw by openFrameworks

[ Video ]

[ About ]
色を経過時間で変化させる。

Change the color over time.

[ 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 < 2; 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() {

	ofColor color;
	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);

			color.setHsb((ofGetFrameNum() * 5) % 255, 255, 255);

			this->frame.addColor(color);
			this->face.addColor(ofColor(color, 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.removeColor(i);
			this->face.removeColor(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();
	ofRotateX(ofGetFrameNum() * 0.5);
	ofRotateY(ofGetFrameNum() * 0.75);

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

		ofSetColor(this->frame.getColor(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 < 2; 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() {

ofColor color;

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);

color.setHsb((ofGetFrameNum() * 5) % 255, 255, 255);

this->frame.addColor(color);

this->face.addColor(ofColor(color, 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.removeColor(i);

this->face.removeColor(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();

ofRotateX(ofGetFrameNum() * 0.5);

ofRotateY(ofGetFrameNum() * 0.75);

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

ofSetColor(this->frame.getColor(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/Insta20200714

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2020年7月11日

Circular walk. Draw by openFrameworks

[ Video ]

[ About ]
ぐるぐるウォーク。

Circular walk.

[ Source ]

#pragma once
#include "ofMain.h"

class Walker {

public:
	Walker(glm::vec2 location, ofColor color);
	void update();
	void change_rotate();
	void draw();
private:
	
	glm::vec2 rotate_location;
	float rotate_radius;
	float rotate_deg;
	int rotate_direction;

	vector<glm::vec2> log;
	ofColor color;
};

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) {};

	vector<Walker> walker_list;
};

#pragma once

#include "ofMain.h"

class Walker {

public:

Walker(glm::vec2 location, ofColor color);

void update();

void change_rotate();

void draw();

private:

glm::vec2 rotate_location;

float rotate_radius;

float rotate_deg;

int rotate_direction;

vector<glm::vec2> log;

ofColor color;

};

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) {};

vector<Walker> walker_list;

};

#include "ofApp.h"

//--------------------------------------------------------------
Walker::Walker(glm::vec2 location, ofColor color) {

	this->log.push_back(location);
	this->change_rotate();

	this->color = color;
}

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

	if (glm::length(this->log.back()) > 720) {

		this->log.clear();
		auto location = glm::vec2(ofRandom(-300, 300), ofRandom(-300, 300));
		this->log.push_back(location);
		this->change_rotate();
	}

	auto location = this->rotate_location + glm::vec2(this->rotate_radius * cos(this->rotate_deg * DEG_TO_RAD), this->rotate_radius * sin(this->rotate_deg * DEG_TO_RAD));
	this->rotate_deg += this->rotate_direction * 10;
	this->rotate_radius -= 0.25;

	this->log.push_back(location);

	if (this->rotate_radius < 0 || ofRandom(100) < 0.5) {

		this->change_rotate();
	}

	while (this->log.size() > 150) { this->log.erase(this->log.begin()); }
}

//--------------------------------------------------------------
void Walker::change_rotate() {

	auto tmp_radius = ofRandom(30, 80);
	auto tmp_deg = this->rotate_deg + ofRandom(-90, 90);
	this->rotate_location = this->log.back() + glm::vec2(tmp_radius * cos(tmp_deg * DEG_TO_RAD), tmp_radius * sin(tmp_deg * DEG_TO_RAD));
	this->rotate_deg = 180 + tmp_deg;
	this->rotate_radius = tmp_radius;

	this->rotate_direction = ofRandom(100) < 50 ? 1 : -1;
}

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

	for (int i = 0; i < this->log.size() - 1; i++) {

		if (i < this->log.size() * 0.5) {

			ofSetColor(ofColor(color, ofMap(i, 0, this->log.size() * 0.5, 0, 255)));
		}
		else {

			ofSetColor(ofColor(color));
		}
		
		ofDrawLine(this->log[i], this->log[i + 1]);
	}
}

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

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

	ofBackground(0);
	ofSetLineWidth(2);

	vector<ofColor> base_color_list;
	ofColor color;
	vector<int> hex_list = { 0x247BA0, 0x70C1B3, 0xB2DBBF, 0xF3FFBD, 0xFF1654 };
	for (auto hex : hex_list) {

		color.setHex(hex);
		base_color_list.push_back(color);
	}

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

		this->walker_list.push_back(Walker(glm::vec2(ofRandom(-300, 300), ofRandom(-300, 300)), base_color_list[ofRandom(base_color_list.size())]));
	}
}

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

	for (auto& walker : this->walker_list) {

		walker.update();
	}
}

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

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

	for (auto& walker : this->walker_list) {

		walker.draw();
	}
}

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

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

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#include "ofApp.h"

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

Walker::Walker(glm::vec2 location, ofColor color) {

this->log.push_back(location);

this->change_rotate();

this->color = color;

}

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

void Walker::update() {

if (glm::length(this->log.back()) > 720) {

this->log.clear();

auto location = glm::vec2(ofRandom(-300, 300), ofRandom(-300, 300));

this->log.push_back(location);

this->change_rotate();

}

auto location = this->rotate_location + glm::vec2(this->rotate_radius * cos(this->rotate_deg * DEG_TO_RAD), this->rotate_radius * sin(this->rotate_deg * DEG_TO_RAD));

this->rotate_deg += this->rotate_direction * 10;

this->rotate_radius -= 0.25;

this->log.push_back(location);

if (this->rotate_radius < 0 || ofRandom(100) < 0.5) {

this->change_rotate();

}

while (this->log.size() > 150) { this->log.erase(this->log.begin()); }

}

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

void Walker::change_rotate() {

auto tmp_radius = ofRandom(30, 80);

auto tmp_deg = this->rotate_deg + ofRandom(-90, 90);

this->rotate_location = this->log.back() + glm::vec2(tmp_radius * cos(tmp_deg * DEG_TO_RAD), tmp_radius * sin(tmp_deg * DEG_TO_RAD));

this->rotate_deg = 180 + tmp_deg;

this->rotate_radius = tmp_radius;

this->rotate_direction = ofRandom(100) < 50 ? 1 : -1;

}

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

void Walker::draw() {

for (int i = 0; i < this->log.size() - 1; i++) {

if (i < this->log.size() * 0.5) {

ofSetColor(ofColor(color, ofMap(i, 0, this->log.size() * 0.5, 0, 255)));

}

else {

ofSetColor(ofColor(color));

}

ofDrawLine(this->log[i], this->log[i + 1]);

}

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(0);

ofSetLineWidth(2);

vector<ofColor> base_color_list;

ofColor color;

vector<int> hex_list = { 0x247BA0, 0x70C1B3, 0xB2DBBF, 0xF3FFBD, 0xFF1654 };

for (auto hex : hex_list) {

color.setHex(hex);

base_color_list.push_back(color);

}

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

this->walker_list.push_back(Walker(glm::vec2(ofRandom(-300, 300), ofRandom(-300, 300)), base_color_list[ofRandom(base_color_list.size())]));

}

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

void ofApp::update() {

for (auto& walker : this->walker_list) {

walker.update();

}

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

void ofApp::draw() {

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

for (auto& walker : this->walker_list) {

walker.draw();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200711

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