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24日

one-quarter.

[ Video ]

[ About ]
1/4.

[ 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) {};

	void setRingToMesh(ofMesh& mesh, glm::vec3 location, float radius, float width, int deg_start, int deg_end);

	ofMesh mesh;
	float noise_param;
};

#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) {};

void setRingToMesh(ofMesh& mesh, glm::vec3 location, float radius, float width, int deg_start, int deg_end);

ofMesh mesh;

float noise_param;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);

	this->noise_param = ofRandom(1000);
}

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

	ofSeedRandom(39);

	this->mesh.clear();

	int width = 20;
	int deg_span = 90;
	for (int x = 180; x < ofGetWidth(); x += 360) {

		for (int y = 180; y < ofGetHeight(); y += 360) {

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

				auto noise_param = ofRandom(1000);

				int radius = ofMap(ofNoise(noise_param, cos(deg * DEG_TO_RAD) * 15, sin(deg * DEG_TO_RAD) * 15, this->noise_param), 0, 1, 30, 160);

				this->setRingToMesh(this->mesh, glm::vec3(x, y, 0), radius, width, deg, deg + deg_span);
			}
		}
	}

	if (ofGetFrameNum() % 50 < 40) {

		this->noise_param += ofMap(ofGetFrameNum() % 50, 0, 40, 0.15, 0);
	}
}

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

	this->mesh.draw();

	/*
	// ffmpeg -i img_%04d.jpg aaa.mp4
	int start = 50;
	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);
		}
	}
	*/
}

//--------------------------------------------------------------
void ofApp::setRingToMesh(ofMesh& mesh, glm::vec3 location, float radius, float width, int deg_start, int deg_end) {

	if (deg_start == deg_end) { return; }

	int deg_span = 5;
	for (int deg = deg_start; deg < deg_end; deg += deg_span) {

		auto index = mesh.getNumVertices();

		vector<glm::vec3> vertices;
		vertices.push_back(location + glm::vec3((radius + width * 0.5) * cos(deg * DEG_TO_RAD), (radius + width * 0.5) * sin(deg * DEG_TO_RAD), 0));
		vertices.push_back(location + glm::vec3((radius + width * 0.5) * cos((deg + deg_span) * DEG_TO_RAD), (radius + width * 0.5) * sin((deg + deg_span) * DEG_TO_RAD), 0));
		vertices.push_back(location + glm::vec3((radius - width * 0.5) * cos((deg + deg_span) * DEG_TO_RAD), (radius - width * 0.5) * sin((deg + deg_span) * DEG_TO_RAD), 0));
		vertices.push_back(location + glm::vec3((radius - width * 0.5) * cos(deg * DEG_TO_RAD), (radius - width * 0.5) * sin(deg * DEG_TO_RAD), 0));

		mesh.addVertices(vertices);

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

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(25);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(39);

this->noise_param = ofRandom(1000);

}

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

void ofApp::update() {

ofSeedRandom(39);

this->mesh.clear();

int width = 20;

int deg_span = 90;

for (int x = 180; x < ofGetWidth(); x += 360) {

for (int y = 180; y < ofGetHeight(); y += 360) {

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

auto noise_param = ofRandom(1000);

int radius = ofMap(ofNoise(noise_param, cos(deg * DEG_TO_RAD) * 15, sin(deg * DEG_TO_RAD) * 15, this->noise_param), 0, 1, 30, 160);

this->setRingToMesh(this->mesh, glm::vec3(x, y, 0), radius, width, deg, deg + deg_span);

}

if (ofGetFrameNum() % 50 < 40) {

this->noise_param += ofMap(ofGetFrameNum() % 50, 0, 40, 0.15, 0);

}

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

void ofApp::draw() {

this->mesh.draw();

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

int start = 50;

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);

}

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

void ofApp::setRingToMesh(ofMesh& mesh, glm::vec3 location, float radius, float width, int deg_start, int deg_end) {

if (deg_start == deg_end) { return; }

int deg_span = 5;

for (int deg = deg_start; deg < deg_end; deg += deg_span) {

auto index = mesh.getNumVertices();

vector<glm::vec3> vertices;

vertices.push_back(location + glm::vec3((radius + width * 0.5) * cos(deg * DEG_TO_RAD), (radius + width * 0.5) * sin(deg * DEG_TO_RAD), 0));

vertices.push_back(location + glm::vec3((radius + width * 0.5) * cos((deg + deg_span) * DEG_TO_RAD), (radius + width * 0.5) * sin((deg + deg_span) * DEG_TO_RAD), 0));

vertices.push_back(location + glm::vec3((radius - width * 0.5) * cos((deg + deg_span) * DEG_TO_RAD), (radius - width * 0.5) * sin((deg + deg_span) * DEG_TO_RAD), 0));

vertices.push_back(location + glm::vec3((radius - width * 0.5) * cos(deg * DEG_TO_RAD), (radius - width * 0.5) * sin(deg * DEG_TO_RAD), 0));

mesh.addVertices(vertices);

mesh.addIndex(index + 0); mesh.addIndex(index + 1); mesh.addIndex(index + 2);

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

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/DoodleDeProgramming/tree/a05bc010b3aec505274b80ee09a81d94753fbc01

2026年2月23日2026年2月23日

Rainbow Shower.

[ Video ]

[ About ]
レインボーシャワー。

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

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

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

}

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

	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);
	
	ofSeedRandom(39);
	auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

	int count = 25;
	int len = 160;
	float head_size = 2;
	
	ofColor color;

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

		color.setHsb(ofMap(k, 0, count, 0, 255), 130, 255);
		ofSetColor(color);

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

		glm::vec3 last_location;
		float last_theta;

		float deg = ofMap(k, 0, count, 0, 360);
		float span = 0.0314;
		for (int i = 0; i < len; i++) {

			auto radius = ofMap(sin((ofGetFrameNum() + i) * span), 0, 1, 270, 330);
			auto next_radius = ofMap(sin((ofGetFrameNum() + i + 1) * span), 0, 1, 270, 330);

			auto location = glm::vec3(radius * cos((ofGetFrameNum() + i + deg) * DEG_TO_RAD), radius * sin((ofGetFrameNum() + i + deg) * DEG_TO_RAD), 0);
			auto next = glm::vec3(next_radius * cos((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), next_radius * sin((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), 0);

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

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

		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);
		}

		mesh.addVertex(last_location);
		int index = mesh.getNumVertices();
		for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

			mesh.addVertex(last_location + glm::vec3(head_size * cos(theta), 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();
	}

	/*
	// ffmpeg -i img_%04d.jpg aaa.mp4
	int start = 60;
	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() {

}

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

void ofApp::draw() {

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

ofSeedRandom(39);

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

int count = 25;

int len = 160;

float head_size = 2;

ofColor color;

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

color.setHsb(ofMap(k, 0, count, 0, 255), 130, 255);

ofSetColor(color);

ofMesh mesh;

vector<glm::vec3> right, left;

glm::vec3 last_location;

float last_theta;

float deg = ofMap(k, 0, count, 0, 360);

float span = 0.0314;

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

auto radius = ofMap(sin((ofGetFrameNum() + i) * span), 0, 1, 270, 330);

auto next_radius = ofMap(sin((ofGetFrameNum() + i + 1) * span), 0, 1, 270, 330);

auto location = glm::vec3(radius * cos((ofGetFrameNum() + i + deg) * DEG_TO_RAD), radius * sin((ofGetFrameNum() + i + deg) * DEG_TO_RAD), 0);

auto next = glm::vec3(next_radius * cos((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), next_radius * sin((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), 0);

auto direction = next - location;

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

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

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

}

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);

}

mesh.addVertex(last_location);

int index = mesh.getNumVertices();

for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

mesh.addVertex(last_location + glm::vec3(head_size * cos(theta), 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();

}

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

int start = 60;

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/e2106e6113b077f9ac926cba7b39847c0624ab17

2026年2月22日

Mesh torus.

[ Video ]

[ About ]
メッシュトーラス。

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

	ofBackground(239);
	ofNoFill();
	ofSetLineWidth(3);
}

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


}

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

	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);
	
	ofSeedRandom(39);
	auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

	int count = 60;
	int len = 120;
	float head_size = 3;
	
	ofSetColor(39);
	for (int k = 0; k < count; k++) {

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

		glm::vec3 last_location;
		float last_theta;

		float random = ofRandom(1000);
		float deg = ofMap(k, 0, count, 0, 360);
		float span = ofRandom(0.01, 0.08);
		for (int i = 0; i < len; i++) {

			auto radius = ofMap(sin((random + ofGetFrameNum() + i) * span), 0, 1, 270, 330);
			auto next_radius = ofMap(sin((random + ofGetFrameNum() + i + 1) * span), 0, 1, 270, 330);

			auto location = glm::vec3(radius * cos((ofGetFrameNum() + i + deg) * DEG_TO_RAD), radius * sin((ofGetFrameNum() + i + deg) * DEG_TO_RAD), 0);
			auto next = glm::vec3(next_radius * cos((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), next_radius * sin((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), 0);

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

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

			last_location = location;
			last_theta = theta;
		}

		for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

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

		ofBeginShape();
		ofVertices(frame);
		std::reverse(right.begin(), right.end());
		ofVertices(right);
		ofVertices(left);
		ofEndShape(true);
	}

	ofSeedRandom(39);
	noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

	ofSetColor(239);
	for (int k = 0; k < count; k++) {

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

		glm::vec3 last_location;
		float last_theta;

		float random = ofRandom(1000);
		float deg = ofMap(k, 0, count, 0, 360);
		float span = ofRandom(0.01, 0.08);
		for (int i = 0; i < len; i++) {

			auto radius = ofMap(sin((random + ofGetFrameNum() + i) * span), 0, 1, 270, 330);
			auto next_radius = ofMap(sin((random + ofGetFrameNum() + i + 1) * span), 0, 1, 270, 330);

			auto location = glm::vec3(radius * cos((ofGetFrameNum() + i + deg) * DEG_TO_RAD), radius * sin((ofGetFrameNum() + i + deg) * DEG_TO_RAD), 0);
			auto next = glm::vec3(next_radius * cos((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), next_radius * sin((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), 0);

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

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


		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);
		}

		mesh.addVertex(last_location);
		int index = mesh.getNumVertices();
		for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

			mesh.addVertex(last_location + glm::vec3(head_size * cos(theta), 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();
	}

	/*
	// 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);

ofNoFill();

ofSetLineWidth(3);

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

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

ofSeedRandom(39);

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

int count = 60;

int len = 120;

float head_size = 3;

ofSetColor(39);

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

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

glm::vec3 last_location;

float last_theta;

float random = ofRandom(1000);

float deg = ofMap(k, 0, count, 0, 360);

float span = ofRandom(0.01, 0.08);

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

auto radius = ofMap(sin((random + ofGetFrameNum() + i) * span), 0, 1, 270, 330);

auto next_radius = ofMap(sin((random + ofGetFrameNum() + i + 1) * span), 0, 1, 270, 330);

auto location = glm::vec3(radius * cos((ofGetFrameNum() + i + deg) * DEG_TO_RAD), radius * sin((ofGetFrameNum() + i + deg) * DEG_TO_RAD), 0);

auto next = glm::vec3(next_radius * cos((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), next_radius * sin((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), 0);

auto direction = next - location;

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

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

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

last_location = location;

last_theta = theta;

}

for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

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

}

ofBeginShape();

ofVertices(frame);

std::reverse(right.begin(), right.end());

ofVertices(right);

ofVertices(left);

ofEndShape(true);

}

ofSeedRandom(39);

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

ofSetColor(239);

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

ofMesh mesh;

vector<glm::vec3> right, left;

glm::vec3 last_location;

float last_theta;

float random = ofRandom(1000);

float deg = ofMap(k, 0, count, 0, 360);

float span = ofRandom(0.01, 0.08);

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

auto radius = ofMap(sin((random + ofGetFrameNum() + i) * span), 0, 1, 270, 330);

auto next_radius = ofMap(sin((random + ofGetFrameNum() + i + 1) * span), 0, 1, 270, 330);

auto location = glm::vec3(radius * cos((ofGetFrameNum() + i + deg) * DEG_TO_RAD), radius * sin((ofGetFrameNum() + i + deg) * DEG_TO_RAD), 0);

auto next = glm::vec3(next_radius * cos((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), next_radius * sin((ofGetFrameNum() + i + 1 + deg) * DEG_TO_RAD), 0);

auto direction = next - location;

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

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

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

}

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);

}

mesh.addVertex(last_location);

int index = mesh.getNumVertices();

for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) {

mesh.addVertex(last_location + glm::vec3(head_size * cos(theta), 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();

}

// 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/519bb5dc54210f48895b5dfe6bb8ffe7051aca6a

2026年2月
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