openFrameworks – ページ 2 – プログラミング de 落描き

2025年8月30日

Edge of circle.

[ Video ]

[ About ]
円の境界線。

[ 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<glm::vec2> location_list;
	vector<glm::vec2> velocity_list;
	vector<vector<glm::vec2>> log_list;
	vector<float> speed_list;
	vector<float> life_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<glm::vec2> location_list;

vector<glm::vec2> velocity_list;

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

vector<float> speed_list;

vector<float> life_list;

vector<ofColor> color_list;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofNoFill();
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_SUBTRACT);
}

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

	for (int i = 0; i < 50; i++) {

		auto deg = ofRandom(ofGetFrameNum() * 1.44 - 5 + (i % 6) * 60, ofGetFrameNum() * 1.44 + 5 + (i % 6) * 60);
		auto location = glm::vec2(200 * cos(deg * DEG_TO_RAD), 200 * sin(deg * DEG_TO_RAD));
		auto next = glm::vec2(201 * cos(deg * DEG_TO_RAD), 201 * sin(deg * DEG_TO_RAD));

		this->location_list.push_back(location);
		if (ofRandom(100) < 50) {

			this->velocity_list.push_back(next - location);
		}
		else {

			this->velocity_list.push_back(location - next);
		}
		vector<glm::vec2> log;
		this->log_list.push_back(log);
		this->speed_list.push_back(ofRandom(5, 10));
		this->life_list.push_back(20);

		this->color_list.push_back(ofColor(128));
	}

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

		auto fueture = glm::normalize(this->velocity_list[i]) * 30;
		auto deg = ofMap(ofNoise(glm::vec3(this->location_list[i] * 0.01, ofGetFrameNum() * 0.005)), 0, 1, -360, 360);
		fueture = fueture + glm::vec2(10 * cos(deg * DEG_TO_RAD), 10 * sin(deg * DEG_TO_RAD));
		this->log_list[i].push_back(this->location_list[i]);
		this->location_list[i] += glm::normalize(fueture) * this->speed_list[i];

		this->life_list[i] -= 1;

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

			this->location_list.erase(this->location_list.begin() + i);
			this->velocity_list.erase(this->velocity_list.begin() + i);
			this->log_list.erase(this->log_list.begin() + i);
			this->speed_list.erase(this->speed_list.begin() + i);
			this->life_list.erase(this->life_list.begin() + i);
			this->color_list.erase(this->color_list.begin() + i);
		}
	}
}

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

	ofTranslate(ofGetWindowSize() * 0.5);

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

		ofSetColor(this->color_list[i], ofMap(this->life_list[i], 0, 12, 32, 255));

		ofBeginShape();
		ofVertices(this->log_list[i]);
		ofEndShape();
	}

	/*
	int start = 150;
	if (ofGetFrameNum() > start) {

		ostringstream os;
		os << setw(4) << 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());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(25);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofNoFill();

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_SUBTRACT);

}

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

void ofApp::update() {

for (int i = 0; i < 50; i++) {

auto deg = ofRandom(ofGetFrameNum() * 1.44 - 5 + (i % 6) * 60, ofGetFrameNum() * 1.44 + 5 + (i % 6) * 60);

auto location = glm::vec2(200 * cos(deg * DEG_TO_RAD), 200 * sin(deg * DEG_TO_RAD));

auto next = glm::vec2(201 * cos(deg * DEG_TO_RAD), 201 * sin(deg * DEG_TO_RAD));

this->location_list.push_back(location);

if (ofRandom(100) < 50) {

this->velocity_list.push_back(next - location);

}

else {

this->velocity_list.push_back(location - next);

}

vector<glm::vec2> log;

this->log_list.push_back(log);

this->speed_list.push_back(ofRandom(5, 10));

this->life_list.push_back(20);

this->color_list.push_back(ofColor(128));

}

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

auto fueture = glm::normalize(this->velocity_list[i]) * 30;

auto deg = ofMap(ofNoise(glm::vec3(this->location_list[i] * 0.01, ofGetFrameNum() * 0.005)), 0, 1, -360, 360);

fueture = fueture + glm::vec2(10 * cos(deg * DEG_TO_RAD), 10 * sin(deg * DEG_TO_RAD));

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

this->location_list[i] += glm::normalize(fueture) * this->speed_list[i];

this->life_list[i] -= 1;

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

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

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

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

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

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

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

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

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

ofSetColor(this->color_list[i], ofMap(this->life_list[i], 0, 12, 32, 255));

ofBeginShape();

ofVertices(this->log_list[i]);

ofEndShape();

}

int start = 150;

if (ofGetFrameNum() > start) {

ostringstream os;

os << setw(4) << 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/Insta20250830

2025年8月29日

Circle or Arrow.

[ Video ]

[ About ]
円または矢印。

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

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

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

	void draw_arrow(glm::vec2 location, glm::vec2 next_location, float size, ofColor color);
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

void draw_arrow(glm::vec2 location, glm::vec2 next_location, float size, ofColor color);

};

#include "ofApp.h"

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

	ofSetFrameRate(25);
	ofSetWindowTitle("openFrameworks");

	ofBackground(39);
}

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

	ofSeedRandom(39);
}

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

	ofTranslate(ofGetWindowSize() * 0.5);

	int span = 30;
	for (int x = -330; x <= 330; x += span) {

		for (int y = -330; y <= 330; y += span) {

			auto noise_value = ofNoise(x * 0.001, y * 0.001, ofGetFrameNum() * 0.02);
			auto next_noise_value = ofNoise(x * 0.001, y * 0.001, (ofGetFrameNum() + 1) * 0.02);

			auto noise_param = noise_value < 0.49 ? 0 :
				noise_value > 0.51 ? 1 :
				ofMap(noise_value, 0.49, 0.51, 0, 1);
			auto next_noise_param = next_noise_value < 0.49 ? 0 :
				next_noise_value > 0.51 ? 1 :
				ofMap(next_noise_value, 0.49, 0.51, 0, 1);

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

			auto param_x = ofMap(ofNoise(noise_seed.x, ofGetFrameNum() * 0.05), 0, 1, span * -1.5, span * 1.5) * noise_param;
			auto param_y = ofMap(ofNoise(noise_seed.y, ofGetFrameNum() * 0.05), 0, 1, span * -1.5, span * 1.5) * noise_param;

			auto next_param_x = ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + 1) * 0.05), 0, 1, span * -1.5, span * 1.5) * next_noise_param;
			auto next_param_y = ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + 1) * 0.05), 0, 1, span * -1.5, span * 1.5) * next_noise_param;

			if (noise_param > 0) {

				this->draw_arrow(glm::vec2(x + param_x, y + param_y), glm::vec2(x + next_param_x, y + next_param_y), span * 0.25, ofColor(239, 39, 39));

				ofDrawLine(glm::vec2(x + param_x, y + param_y), glm::vec2(x + next_param_x, y + next_param_y));
			}
			else {

				ofFill();
				ofSetColor(239);
				ofDrawCircle(x + param_x, y + param_y, span * 0.15);
			}
		}
	}

	/*
	int start = 50;
	if (ofGetFrameNum() > start) {

		ostringstream os;
		os << setw(4) << 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);
		}
	}
	*/
}

//--------------------------------------------------------------
void ofApp::draw_arrow(glm::vec2 location, glm::vec2 next_location, float size, ofColor color) {

	auto angle = std::atan2(next_location.y - location.y, next_location.x - location.x);

	ofSetColor(color);
	ofFill();
	ofBeginShape();
	ofVertex(glm::vec2(size * 0.8 * cos(angle), size * 0.8 * sin(angle)) + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) + location);
	ofEndShape(true);

	ofBeginShape();
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);
	ofEndShape(true);

	ofSetColor(color);
	ofNoFill();
	ofBeginShape();
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) + location);
	ofVertex(glm::vec2(size * 0.8 * cos(angle), size * 0.8 * sin(angle)) + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);
	ofEndShape();

	ofBeginShape();
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);
	ofEndShape();
}

//--------------------------------------------------------------
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);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

int span = 30;

for (int x = -330; x <= 330; x += span) {

for (int y = -330; y <= 330; y += span) {

auto noise_value = ofNoise(x * 0.001, y * 0.001, ofGetFrameNum() * 0.02);

auto next_noise_value = ofNoise(x * 0.001, y * 0.001, (ofGetFrameNum() + 1) * 0.02);

auto noise_param = noise_value < 0.49 ? 0 :

noise_value > 0.51 ? 1 :

ofMap(noise_value, 0.49, 0.51, 0, 1);

auto next_noise_param = next_noise_value < 0.49 ? 0 :

next_noise_value > 0.51 ? 1 :

ofMap(next_noise_value, 0.49, 0.51, 0, 1);

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

auto param_x = ofMap(ofNoise(noise_seed.x, ofGetFrameNum() * 0.05), 0, 1, span * -1.5, span * 1.5) * noise_param;

auto param_y = ofMap(ofNoise(noise_seed.y, ofGetFrameNum() * 0.05), 0, 1, span * -1.5, span * 1.5) * noise_param;

auto next_param_x = ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + 1) * 0.05), 0, 1, span * -1.5, span * 1.5) * next_noise_param;

auto next_param_y = ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + 1) * 0.05), 0, 1, span * -1.5, span * 1.5) * next_noise_param;

if (noise_param > 0) {

this->draw_arrow(glm::vec2(x + param_x, y + param_y), glm::vec2(x + next_param_x, y + next_param_y), span * 0.25, ofColor(239, 39, 39));

ofDrawLine(glm::vec2(x + param_x, y + param_y), glm::vec2(x + next_param_x, y + next_param_y));

}

else {

ofFill();

ofSetColor(239);

ofDrawCircle(x + param_x, y + param_y, span * 0.15);

}

int start = 50;

if (ofGetFrameNum() > start) {

ostringstream os;

os << setw(4) << 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);

}

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

void ofApp::draw_arrow(glm::vec2 location, glm::vec2 next_location, float size, ofColor color) {

auto angle = std::atan2(next_location.y - location.y, next_location.x - location.x);

ofSetColor(color);

ofFill();

ofBeginShape();

ofVertex(glm::vec2(size * 0.8 * cos(angle), size * 0.8 * sin(angle)) + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) + location);

ofEndShape(true);

ofBeginShape();

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);

ofEndShape(true);

ofSetColor(color);

ofNoFill();

ofBeginShape();

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) + location);

ofVertex(glm::vec2(size * 0.8 * cos(angle), size * 0.8 * sin(angle)) + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);

ofEndShape();

ofBeginShape();

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);

ofEndShape();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20250829

2025年8月28日

Bugs.

[ Video ]

[ About ]
虫。

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

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

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

	void draw_arrow(glm::vec2 location, glm::vec2 next_location, float size, ofColor color);
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

void draw_arrow(glm::vec2 location, glm::vec2 next_location, float size, ofColor color);

};

#include "ofApp.h"

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

	ofSetFrameRate(25);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);
}

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

	ofSeedRandom(39);
}

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

	ofTranslate(ofGetWindowSize() * 0.5);

	int span = 10;
	for (int x = -300; x <= 300; x += span) {

		for (int y = -300; y <= 300; y += span) {

			auto noise_value = ofNoise(x * 0.01, y * 0.01, ofGetFrameNum() * 0.02);
			auto next_noise_value = ofNoise(x * 0.01, y * 0.01, (ofGetFrameNum() + 1) * 0.02);

			auto noise_param = noise_value < 0.49 ? 0 :
				noise_value > 0.51 ? 1 :
				ofMap(noise_value, 0.49, 0.51, 0, 1);
			auto next_noise_param = next_noise_value < 0.49 ? 0 :
				next_noise_value > 0.51 ? 1 :
				ofMap(next_noise_value, 0.49, 0.51, 0, 1);

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

			auto param_x = ofMap(ofNoise(noise_seed.x, ofGetFrameNum() * 0.05), 0, 1, span * -1.5, span * 1.5) * noise_param;
			auto param_y = ofMap(ofNoise(noise_seed.y, ofGetFrameNum() * 0.05), 0, 1, span * -1.5, span * 1.5) * noise_param;

			auto next_param_x = ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + 1) * 0.05), 0, 1, span * -1.5, span * 1.5) * next_noise_param;
			auto next_param_y = ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + 1) * 0.05), 0, 1, span * -1.5, span * 1.5) * next_noise_param;

			if (noise_param > 0) {

				this->draw_arrow(glm::vec2(x + param_x, y + param_y), glm::vec2(x + next_param_x, y + next_param_y), span * 0.25, ofColor(0));

				ofDrawLine(glm::vec2(x + param_x, y + param_y), glm::vec2(x + next_param_x, y + next_param_y));
			}
			else {

				ofFill();
				ofDrawCircle(x + param_x, y + param_y, span * 0.1);
			}
		}
	}

	/*
	int start = 50;
	if (ofGetFrameNum() > start) {

		ostringstream os;
		os << setw(4) << 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);
		}
	}
	*/
}

//--------------------------------------------------------------
void ofApp::draw_arrow(glm::vec2 location, glm::vec2 next_location, float size, ofColor color) {

	auto angle = std::atan2(next_location.y - location.y, next_location.x - location.x);

	ofSetColor(color);
	ofFill();
	ofBeginShape();
	ofVertex(glm::vec2(size * 0.8 * cos(angle), size * 0.8 * sin(angle)) + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) + location);
	ofEndShape(true);

	ofBeginShape();
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);
	ofEndShape(true);

	ofSetColor(color);
	ofNoFill();
	ofBeginShape();
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) + location);
	ofVertex(glm::vec2(size * 0.8 * cos(angle), size * 0.8 * sin(angle)) + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);
	ofEndShape();

	ofBeginShape();
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);
	ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);
	ofEndShape();
}

//--------------------------------------------------------------
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);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

int span = 10;

for (int x = -300; x <= 300; x += span) {

for (int y = -300; y <= 300; y += span) {

auto noise_value = ofNoise(x * 0.01, y * 0.01, ofGetFrameNum() * 0.02);

auto next_noise_value = ofNoise(x * 0.01, y * 0.01, (ofGetFrameNum() + 1) * 0.02);

auto noise_param = noise_value < 0.49 ? 0 :

noise_value > 0.51 ? 1 :

ofMap(noise_value, 0.49, 0.51, 0, 1);

auto next_noise_param = next_noise_value < 0.49 ? 0 :

next_noise_value > 0.51 ? 1 :

ofMap(next_noise_value, 0.49, 0.51, 0, 1);

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

auto param_x = ofMap(ofNoise(noise_seed.x, ofGetFrameNum() * 0.05), 0, 1, span * -1.5, span * 1.5) * noise_param;

auto param_y = ofMap(ofNoise(noise_seed.y, ofGetFrameNum() * 0.05), 0, 1, span * -1.5, span * 1.5) * noise_param;

auto next_param_x = ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + 1) * 0.05), 0, 1, span * -1.5, span * 1.5) * next_noise_param;

auto next_param_y = ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + 1) * 0.05), 0, 1, span * -1.5, span * 1.5) * next_noise_param;

if (noise_param > 0) {

this->draw_arrow(glm::vec2(x + param_x, y + param_y), glm::vec2(x + next_param_x, y + next_param_y), span * 0.25, ofColor(0));

ofDrawLine(glm::vec2(x + param_x, y + param_y), glm::vec2(x + next_param_x, y + next_param_y));

}

else {

ofFill();

ofDrawCircle(x + param_x, y + param_y, span * 0.1);

}

int start = 50;

if (ofGetFrameNum() > start) {

ostringstream os;

os << setw(4) << 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);

}

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

void ofApp::draw_arrow(glm::vec2 location, glm::vec2 next_location, float size, ofColor color) {

auto angle = std::atan2(next_location.y - location.y, next_location.x - location.x);

ofSetColor(color);

ofFill();

ofBeginShape();

ofVertex(glm::vec2(size * 0.8 * cos(angle), size * 0.8 * sin(angle)) + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) + location);

ofEndShape(true);

ofBeginShape();

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);

ofEndShape(true);

ofSetColor(color);

ofNoFill();

ofBeginShape();

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) + location);

ofVertex(glm::vec2(size * 0.8 * cos(angle), size * 0.8 * sin(angle)) + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);

ofEndShape();

ofBeginShape();

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle + PI * 0.5), size * 0.5 * sin(angle + PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 - glm::vec2(size * cos(angle), size * sin(angle)) * 0.5 + location);

ofVertex(glm::vec2(size * 0.5 * cos(angle - PI * 0.5), size * 0.5 * sin(angle - PI * 0.5)) * 0.25 + location);

ofEndShape();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20250828

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