プログラミング de 落描き – クリエイティブ・コーディングによる生成物とソース

2026年2月16日

Clear triangle.

[ Video ]

[ About ]
透明な三角形。

[ 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(25);
	ofSetWindowTitle("openframeworks");

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

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	ofRotateZ(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));
	ofRotateY(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));
	ofRotateX(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));

	ofMesh mesh;
	auto param = 130;
	glm::vec3 avg;
	float noise_value;

	vector<glm::vec3> vertices;
	vertices.push_back(glm::vec4(param, param, param, 0));
	vertices.push_back(glm::vec4(param, -param, -param, 0));
	vertices.push_back(glm::vec4(-param, param, -param, 0));
	vertices.push_back(glm::vec4(-param, -param, param, 0));

	avg = (vertices[0] + vertices[1] + vertices[2]) / 3;
	noise_value = ofNoise(glm::vec4(avg * 0.0085, ofGetFrameNum() * 0.05));
	noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

	mesh.addVertex(vertices[0] + avg * noise_value);
	mesh.addVertex(vertices[1] + avg * noise_value);
	mesh.addVertex(vertices[2] + avg * noise_value);

	ofDrawLine(glm::vec3(), avg + avg * noise_value);
	ofDrawBox(avg + avg * noise_value, 5);

	avg = (vertices[0] + vertices[1] + vertices[3]) / 3;
	noise_value = ofNoise(glm::vec4(avg * 0.0085, ofGetFrameNum() * 0.05));
	noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

	mesh.addVertex(vertices[0] + avg * noise_value);
	mesh.addVertex(vertices[1] + avg * noise_value);
	mesh.addVertex(vertices[3] + avg * noise_value);

	ofDrawLine(glm::vec3(), avg + avg * noise_value);
	ofDrawBox(avg + avg * noise_value, 5);

	avg = (vertices[0] + vertices[2] + vertices[3]) / 3;
	noise_value = ofNoise(glm::vec4(avg * 0.0085, ofGetFrameNum() * 0.05));
	noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

	mesh.addVertex(vertices[0] + avg * noise_value);
	mesh.addVertex(vertices[2] + avg * noise_value);
	mesh.addVertex(vertices[3] + avg * noise_value);

	ofDrawLine(glm::vec3(), avg + avg * noise_value);
	ofDrawBox(avg + avg * noise_value, 5);

	avg = (vertices[1] + vertices[2] + vertices[3]) / 3;
	noise_value = ofNoise(glm::vec4(avg * 0.0085, ofGetFrameNum() * 0.05));
	noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 5);

	mesh.addVertex(vertices[1] + avg * noise_value);
	mesh.addVertex(vertices[2] + avg * noise_value);
	mesh.addVertex(vertices[3] + avg * noise_value);

	ofDrawLine(glm::vec3(), avg + avg * noise_value);
	ofDrawBox(avg + avg * noise_value, 5);

	mesh.drawWireframe();

	for (auto& vertex : mesh.getVertices()) {

		ofDrawSphere(vertex, 10);
	}
	ofDrawSphere(glm::vec3(), 10);

	this->cam.end();

	/*
	// ffmpeg -i img_%04d.jpg aaa.mp4
	int start = 500;
	if (ofGetFrameNum() > start) {

		std::ostringstream os;
		os << std::setw(4) << std::setfill('0') << ofGetFrameNum() - start;
		ofImage image;
		image.grabScreen(0, 0, ofGetWidth(), ofGetHeight());
		image.saveImage("image/cap/img_" + os.str() + ".jpg");
		if (ofGetFrameNum() - start >= 25 * 20) {

			std::exit(1);
		}
	}
	*/
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(25);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetColor(39);

ofSetLineWidth(2);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateZ(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));

ofRotateY(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));

ofRotateX(ofRandom(360) + ofGetFrameNum() * ofRandom(1, 3));

ofMesh mesh;

auto param = 130;

glm::vec3 avg;

float noise_value;

vector<glm::vec3> vertices;

vertices.push_back(glm::vec4(param, param, param, 0));

vertices.push_back(glm::vec4(param, -param, -param, 0));

vertices.push_back(glm::vec4(-param, param, -param, 0));

vertices.push_back(glm::vec4(-param, -param, param, 0));

avg = (vertices[0] + vertices[1] + vertices[2]) / 3;

noise_value = ofNoise(glm::vec4(avg * 0.0085, ofGetFrameNum() * 0.05));

noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

mesh.addVertex(vertices[0] + avg * noise_value);

mesh.addVertex(vertices[1] + avg * noise_value);

mesh.addVertex(vertices[2] + avg * noise_value);

ofDrawLine(glm::vec3(), avg + avg * noise_value);

ofDrawBox(avg + avg * noise_value, 5);

avg = (vertices[0] + vertices[1] + vertices[3]) / 3;

noise_value = ofNoise(glm::vec4(avg * 0.0085, ofGetFrameNum() * 0.05));

noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

mesh.addVertex(vertices[0] + avg * noise_value);

mesh.addVertex(vertices[1] + avg * noise_value);

mesh.addVertex(vertices[3] + avg * noise_value);

ofDrawLine(glm::vec3(), avg + avg * noise_value);

ofDrawBox(avg + avg * noise_value, 5);

avg = (vertices[0] + vertices[2] + vertices[3]) / 3;

noise_value = ofNoise(glm::vec4(avg * 0.0085, ofGetFrameNum() * 0.05));

noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 10);

mesh.addVertex(vertices[0] + avg * noise_value);

mesh.addVertex(vertices[2] + avg * noise_value);

mesh.addVertex(vertices[3] + avg * noise_value);

ofDrawLine(glm::vec3(), avg + avg * noise_value);

ofDrawBox(avg + avg * noise_value, 5);

avg = (vertices[1] + vertices[2] + vertices[3]) / 3;

noise_value = ofNoise(glm::vec4(avg * 0.0085, ofGetFrameNum() * 0.05));

noise_value = noise_value < 0.5 ? 0 : ofMap(noise_value, 0.5, 1, 0, 5);

mesh.addVertex(vertices[1] + avg * noise_value);

mesh.addVertex(vertices[2] + avg * noise_value);

mesh.addVertex(vertices[3] + avg * noise_value);

ofDrawLine(glm::vec3(), avg + avg * noise_value);

ofDrawBox(avg + avg * noise_value, 5);

mesh.drawWireframe();

for (auto& vertex : mesh.getVertices()) {

ofDrawSphere(vertex, 10);

}

ofDrawSphere(glm::vec3(), 10);

this->cam.end();

// ffmpeg -i img_%04d.jpg aaa.mp4

int start = 500;

if (ofGetFrameNum() > start) {

std::ostringstream os;

os << std::setw(4) << std::setfill('0') << ofGetFrameNum() - start;

ofImage image;

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

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

if (ofGetFrameNum() - start >= 25 * 20) {

std::exit(1);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/DoodleDeProgramming/tree/fc12b5ccc8e6cc887d67f71dd9dd0db766360479

2026年2月15日

Gaming particle.

[ Video ]

[ About ]
ゲーミング粒子。

[ 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) {};

	vector<vector<glm::vec2>> log_list;
	vector<glm::vec2> velocity_list;
	vector<float> noise_seed_list;
	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 windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

vector<vector<glm::vec2>> log_list;

vector<glm::vec2> velocity_list;

vector<float> noise_seed_list;

vector<ofColor> color_list;

};

#include "ofApp.h"

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

	ofSetFrameRate(25);
	ofSetWindowTitle("openframeworks");

	ofBackground(39);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
}

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

	ofColor color;
	for (int i = 0; i < 16; i++) {

		auto noise_location = glm::vec2(
			ofMap(ofNoise(39 + i * 1000, ofGetFrameNum() * 0.0025), 0, 1, -400, 400),
			ofMap(ofNoise(239 + i * 1000, ofGetFrameNum() * 0.0025), 0, 1, -400, 400));

		auto next_noise_location = glm::vec2(
			ofMap(ofNoise(39 + i * 1000, (ofGetFrameNum() + 1) * 0.0025), 0, 1, -400, 400),
			ofMap(ofNoise(239 + i * 1000, (ofGetFrameNum() + 1) * 0.0025), 0, 1, -400, 400));

		vector<glm::vec2> log;
		log.push_back(noise_location);
		this->log_list.push_back(log);

		auto deg = glm::atan(next_noise_location.y - noise_location.y, next_noise_location.x - noise_location.x) * RAD_TO_DEG + 180 + ofRandom(-15, 15);
		glm::vec2 velocity = glm::vec2(cos(deg * DEG_TO_RAD), sin(deg * DEG_TO_RAD));
		this->velocity_list.push_back(velocity);

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

		color.setHsb(ofMap((i * 16 + ofGetFrameNum() * 5) % 255, 0, 255, 0, 255), 200, 255);
		this->color_list.push_back(color);
	}

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

		auto future = this->velocity_list[i] * 200;
		auto random_deg = ofMap(ofNoise(glm::vec2(this->noise_seed_list[i], ofGetFrameNum() * 0.01)), 0, 1, 0, 360);
		future += glm::vec2(50 * cos(random_deg * DEG_TO_RAD), 50 * sin(random_deg * DEG_TO_RAD));

		auto next = this->log_list[i].back() + glm::normalize(future) * 3;
		this->log_list[i].push_back(next);

		if (this->log_list[i].size() > 30) {

			this->log_list.erase(this->log_list.begin() + i);
			this->velocity_list.erase(this->velocity_list.begin() + i);
			this->noise_seed_list.erase(this->noise_seed_list.begin() + i);
			this->color_list.erase(this->color_list.begin() + i);
		}
	}
}

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

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

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

		ofSetColor(this->color_list[i]);
		auto size = this->log_list[i].size() < 3 ? 12 : ofMap(this->log_list[i].size(), 3, 30, 12, 0);
		ofDrawCircle(this->log_list[i].back(), size);
	}

	ofSetColor(239);
	for (int i = 0; i < this->log_list.size(); i++) {

		auto size = this->log_list[i].size() < 3 ? 5 : ofMap(this->log_list[i].size(), 3, 30, 5, 0);
		ofDrawCircle(this->log_list[i].back(), size);
	}

	/*
	// ffmpeg -i img_%04d.jpg aaa.mp4
	int start = 500;
	if (ofGetFrameNum() > start) {

		std::ostringstream os;
		os << std::setw(4) << std::setfill('0') << ofGetFrameNum() - start;
		ofImage image;
		image.grabScreen(0, 0, ofGetWidth(), ofGetHeight());
		image.saveImage("image/cap/img_" + os.str() + ".jpg");
		if (ofGetFrameNum() - start >= 25 * 20) {

			std::exit(1);
		}
	}
	*/
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(25);

ofSetWindowTitle("openframeworks");

ofBackground(39);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

}

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

void ofApp::update() {

ofColor color;

for (int i = 0; i < 16; i++) {

auto noise_location = glm::vec2(

ofMap(ofNoise(39 + i * 1000, ofGetFrameNum() * 0.0025), 0, 1, -400, 400),

ofMap(ofNoise(239 + i * 1000, ofGetFrameNum() * 0.0025), 0, 1, -400, 400));

auto next_noise_location = glm::vec2(

ofMap(ofNoise(39 + i * 1000, (ofGetFrameNum() + 1) * 0.0025), 0, 1, -400, 400),

ofMap(ofNoise(239 + i * 1000, (ofGetFrameNum() + 1) * 0.0025), 0, 1, -400, 400));

vector<glm::vec2> log;

log.push_back(noise_location);

this->log_list.push_back(log);

auto deg = glm::atan(next_noise_location.y - noise_location.y, next_noise_location.x - noise_location.x) * RAD_TO_DEG + 180 + ofRandom(-15, 15);

glm::vec2 velocity = glm::vec2(cos(deg * DEG_TO_RAD), sin(deg * DEG_TO_RAD));

this->velocity_list.push_back(velocity);

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

color.setHsb(ofMap((i * 16 + ofGetFrameNum() * 5) % 255, 0, 255, 0, 255), 200, 255);

this->color_list.push_back(color);

}

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

auto future = this->velocity_list[i] * 200;

auto random_deg = ofMap(ofNoise(glm::vec2(this->noise_seed_list[i], ofGetFrameNum() * 0.01)), 0, 1, 0, 360);

future += glm::vec2(50 * cos(random_deg * DEG_TO_RAD), 50 * sin(random_deg * DEG_TO_RAD));

auto next = this->log_list[i].back() + glm::normalize(future) * 3;

this->log_list[i].push_back(next);

if (this->log_list[i].size() > 30) {

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

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

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

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

}

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

void ofApp::draw() {

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

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

ofSetColor(this->color_list[i]);

auto size = this->log_list[i].size() < 3 ? 12 : ofMap(this->log_list[i].size(), 3, 30, 12, 0);

ofDrawCircle(this->log_list[i].back(), size);

}

ofSetColor(239);

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

auto size = this->log_list[i].size() < 3 ? 5 : ofMap(this->log_list[i].size(), 3, 30, 5, 0);

ofDrawCircle(this->log_list[i].back(), size);

}

// ffmpeg -i img_%04d.jpg aaa.mp4

int start = 500;

if (ofGetFrameNum() > start) {

std::ostringstream os;

os << std::setw(4) << std::setfill('0') << ofGetFrameNum() - start;

ofImage image;

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

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

if (ofGetFrameNum() - start >= 25 * 20) {

std::exit(1);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/DoodleDeProgramming/tree/e5f4007cb5def951d206372592d20ed798c1e649

2026年2月14日

Meteor shower.

[ Video ]

[ About ]
流星群。

[ 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) {};

	vector<vector<glm::vec2>> log_list;
	vector<glm::vec2> velocity_list;
	vector<float> noise_seed_list;
	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 windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

vector<vector<glm::vec2>> log_list;

vector<glm::vec2> velocity_list;

vector<float> noise_seed_list;

vector<ofColor> color_list;

};

#include "ofApp.h"

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

	ofSetFrameRate(25);
	ofSetWindowTitle("openframeworks");

	ofBackground(239);
}

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

	ofColor color;
	for (int i = 0; i < 75; i++) {

		auto noise_location = glm::vec2(
			ofMap(ofNoise(39 + i * 1000, ofGetFrameNum() * 0.0015), 0, 1, -600, 600),
			ofMap(ofNoise(239 + i * 1000, ofGetFrameNum() * 0.0015), 0, 1, -600, 600));
		noise_location = glm::length(noise_location) < 500 ? noise_location : glm::normalize(noise_location) * 500;

		auto next_noise_location = glm::vec2(
			ofMap(ofNoise(39 + i * 1000, (ofGetFrameNum() + 1) * 0.0015), 0, 1, -600, 600),
			ofMap(ofNoise(239 + i * 1000, (ofGetFrameNum() + 1) * 0.0015), 0, 1, -600, 600));
		next_noise_location = glm::length(next_noise_location) < 500 ? next_noise_location : glm::normalize(next_noise_location) * 500;

		vector<glm::vec2> log;
		log.push_back(noise_location);
		this->log_list.push_back(log);

		auto deg = glm::atan(next_noise_location.y - noise_location.y, next_noise_location.x - noise_location.x) * RAD_TO_DEG + 180 + ofRandom(-15, 15);
		glm::vec2 velocity = glm::vec2(cos(deg * DEG_TO_RAD), sin(deg * DEG_TO_RAD));
		this->velocity_list.push_back(velocity);

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

		color.setHsb(ofMap(i % 3, 0, 3, 0, 255), 200, 255);
		this->color_list.push_back(color);
	}

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

		auto future = this->velocity_list[i] * 200;
		auto random_deg = ofMap(ofNoise(glm::vec2(this->noise_seed_list[i], ofGetFrameNum() * 0.01)), 0, 1, 0, 360);
		future += glm::vec2(50 * cos(random_deg * DEG_TO_RAD), 50 * sin(random_deg * DEG_TO_RAD));

		auto next = this->log_list[i].back() + glm::normalize(future) * 3;
		next = glm::length(next) < 500 ? next : glm::normalize(next) * 500;
		this->log_list[i].push_back(next);

		if (this->log_list[i].size() > 30) {

			this->log_list.erase(this->log_list.begin() + i);
			this->velocity_list.erase(this->velocity_list.begin() + i);
			this->noise_seed_list.erase(this->noise_seed_list.begin() + i);
			this->color_list.erase(this->color_list.begin() + i);
		}
	}
}

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

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

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

		ofSetColor(this->color_list[i]);
		auto size = this->log_list[i].size() < 3 ? 12 : ofMap(this->log_list[i].size(), 3, 30, 12, 0);
		ofDrawCircle(this->log_list[i].back(), size);
	}

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

		ofSetColor(39);
		auto size = this->log_list[i].size() < 3 ? 9 : ofMap(this->log_list[i].size(), 3, 30, 9, 0);
		ofDrawCircle(this->log_list[i].back(), size);
	}

	/*
	// ffmpeg -i img_%04d.jpg aaa.mp4
	int start = 500;
	if (ofGetFrameNum() > start) {

		std::ostringstream os;
		os << std::setw(4) << std::setfill('0') << ofGetFrameNum() - start;
		ofImage image;
		image.grabScreen(0, 0, ofGetWidth(), ofGetHeight());
		image.saveImage("image/cap/img_" + os.str() + ".jpg");
		if (ofGetFrameNum() - start >= 25 * 20) {

			std::exit(1);
		}
	}
	*/
}

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

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

100

101

102

103

104

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(25);

ofSetWindowTitle("openframeworks");

ofBackground(239);

}

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

void ofApp::update() {

ofColor color;

for (int i = 0; i < 75; i++) {

auto noise_location = glm::vec2(

ofMap(ofNoise(39 + i * 1000, ofGetFrameNum() * 0.0015), 0, 1, -600, 600),

ofMap(ofNoise(239 + i * 1000, ofGetFrameNum() * 0.0015), 0, 1, -600, 600));

noise_location = glm::length(noise_location) < 500 ? noise_location : glm::normalize(noise_location) * 500;

auto next_noise_location = glm::vec2(

ofMap(ofNoise(39 + i * 1000, (ofGetFrameNum() + 1) * 0.0015), 0, 1, -600, 600),

ofMap(ofNoise(239 + i * 1000, (ofGetFrameNum() + 1) * 0.0015), 0, 1, -600, 600));

next_noise_location = glm::length(next_noise_location) < 500 ? next_noise_location : glm::normalize(next_noise_location) * 500;

vector<glm::vec2> log;

log.push_back(noise_location);

this->log_list.push_back(log);

auto deg = glm::atan(next_noise_location.y - noise_location.y, next_noise_location.x - noise_location.x) * RAD_TO_DEG + 180 + ofRandom(-15, 15);

glm::vec2 velocity = glm::vec2(cos(deg * DEG_TO_RAD), sin(deg * DEG_TO_RAD));

this->velocity_list.push_back(velocity);

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

color.setHsb(ofMap(i % 3, 0, 3, 0, 255), 200, 255);

this->color_list.push_back(color);

}

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

auto future = this->velocity_list[i] * 200;

auto random_deg = ofMap(ofNoise(glm::vec2(this->noise_seed_list[i], ofGetFrameNum() * 0.01)), 0, 1, 0, 360);

future += glm::vec2(50 * cos(random_deg * DEG_TO_RAD), 50 * sin(random_deg * DEG_TO_RAD));

auto next = this->log_list[i].back() + glm::normalize(future) * 3;

next = glm::length(next) < 500 ? next : glm::normalize(next) * 500;

this->log_list[i].push_back(next);

if (this->log_list[i].size() > 30) {

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

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

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

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

}

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

void ofApp::draw() {

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

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

ofSetColor(this->color_list[i]);

auto size = this->log_list[i].size() < 3 ? 12 : ofMap(this->log_list[i].size(), 3, 30, 12, 0);

ofDrawCircle(this->log_list[i].back(), size);

}

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

ofSetColor(39);

auto size = this->log_list[i].size() < 3 ? 9 : ofMap(this->log_list[i].size(), 3, 30, 9, 0);

ofDrawCircle(this->log_list[i].back(), size);

}

// ffmpeg -i img_%04d.jpg aaa.mp4

int start = 500;

if (ofGetFrameNum() > start) {

std::ostringstream os;

os << std::setw(4) << std::setfill('0') << ofGetFrameNum() - start;

ofImage image;

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

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

if (ofGetFrameNum() - start >= 25 * 20) {

std::exit(1);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/DoodleDeProgramming/tree/cc3bc03fe731f36cfe455f61c171ef778669a036

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