ofMesh – ページ 83 – プログラミング de 落描き

2022年1月17日2022年1月17日

RecTornade. Draw by openFrameworks

[ Video ]

[ About ]
沢山動かす。

Move a lot.

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

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

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

	glm::vec2 make_point(int len, int param);

	ofEasyCam cam;

	ofMesh face, line;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

glm::vec2 make_point(int len, int param);

ofEasyCam cam;

ofMesh face, line;

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openframeworks");

	ofBackground(255);
	ofSetLineWidth(3);
	ofEnableDepthTest();

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

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

	ofSeedRandom(39);

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

	int width = 10;
	for (int y = -150; y <= 150; y += width) {

		for (int len = 150; len <= 300; len += 2) {

			ofColor color;
			color.setHsb(ofRandom(255), 130, 255);
			int start_param = ofRandom(1000) + ofGetFrameNum() * ofRandom(0.5, 0.8);
			int end_param = start_param + 5;

			for (int param = start_param; param <= end_param; param++) {

				vector<glm::vec3> vertices;
				vertices.push_back(glm::vec3(this->make_point(len, param), width *  0.5 + y));
				vertices.push_back(glm::vec3(this->make_point(len, param), width * -0.5 + y));

				this->face.addVertices(vertices);
				this->line.addVertices(vertices);

				this->face.addColor(ofColor(0));
				this->face.addColor(ofColor(0));

				this->line.addColor(color);
				this->line.addColor(color);

				if (param > start_param) {

					this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 2); this->face.addIndex(this->face.getNumVertices() - 4);
					this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 4);

					this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 3);
					this->line.addIndex(this->line.getNumVertices() - 2); this->line.addIndex(this->line.getNumVertices() - 4);
				}

				if (param % 25 == 0 || param == start_param) {

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

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

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

	this->cam.begin();
	
	ofRotateY(ofGetFrameNum() * 1.8);
	ofRotateX(ofGetFrameNum() * 1.2);

	this->face.draw();
	this->line.drawWireframe();

	this->cam.end();
}

//--------------------------------------------------------------
glm::vec2 ofApp::make_point(int len, int param) {

	param = param % 100;
	if (param < 25) {

		return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5);
	}
	else if (param < 50) {

		return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5));
	}
	else if (param < 75) {

		return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5);
	}
	else {

		return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5));
	}
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(255);

ofSetLineWidth(3);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->face.clear();

this->line.clear();

int width = 10;

for (int y = -150; y <= 150; y += width) {

for (int len = 150; len <= 300; len += 2) {

ofColor color;

color.setHsb(ofRandom(255), 130, 255);

int start_param = ofRandom(1000) + ofGetFrameNum() * ofRandom(0.5, 0.8);

int end_param = start_param + 5;

for (int param = start_param; param <= end_param; param++) {

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(this->make_point(len, param), width * 0.5 + y));

vertices.push_back(glm::vec3(this->make_point(len, param), width * -0.5 + y));

this->face.addVertices(vertices);

this->line.addVertices(vertices);

this->face.addColor(ofColor(0));

this->line.addColor(color);

if (param > start_param) {

this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 2); this->face.addIndex(this->face.getNumVertices() - 4);

this->face.addIndex(this->face.getNumVertices() - 1); this->face.addIndex(this->face.getNumVertices() - 3); this->face.addIndex(this->face.getNumVertices() - 4);

this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 3);

this->line.addIndex(this->line.getNumVertices() - 2); this->line.addIndex(this->line.getNumVertices() - 4);

}

if (param % 25 == 0 || param == start_param) {

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

}

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

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 1.8);

ofRotateX(ofGetFrameNum() * 1.2);

this->face.draw();

this->line.drawWireframe();

this->cam.end();

}

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

glm::vec2 ofApp::make_point(int len, int param) {

param = param % 100;

if (param < 25) {

return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5);

}

else if (param < 50) {

return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5));

}

else if (param < 75) {

return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5);

}

else {

return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5));

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220117

2022年1月16日

Disappearing Torus. Draw by openFrameworks

[ Video ]

[ About ]
消失するトーラス。

Disappearing Torus.

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

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

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

	glm::vec3 make_point(float R, float r, float u, float v);

	ofEasyCam cam;
	ofMesh face, line;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

glm::vec3 make_point(float R, float r, float u, float v);

ofEasyCam cam;

ofMesh face, line;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofEnableDepthTest();

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

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

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

	float phi_deg_step = 3;
	float theta_deg_step = 12;

	float R = 250;

	for (int base_r = 0; base_r <= 20; base_r += 3) {

		int r = (base_r + ofGetFrameNum() * 3) % 100;

		for (float phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) {

			for (float theta_deg = 0; theta_deg < 360; theta_deg += theta_deg_step) {

				auto noise_value = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg, phi_deg) * 0.05, ofGetFrameNum() * 0.02));
				if (noise_value < 0.475) { continue; }

				auto noise_1 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg - theta_deg_step, phi_deg) * 0.05, ofGetFrameNum() * 0.02));
				auto noise_2 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg, phi_deg + phi_deg_step) * 0.05, ofGetFrameNum() * 0.02));
				auto noise_3 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg, phi_deg - phi_deg_step) * 0.05, ofGetFrameNum() * 0.02));
				auto noise_4 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg + theta_deg_step, phi_deg) * 0.05, ofGetFrameNum() * 0.02));

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

				vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5)));
				vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5)));
				vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5)));
				vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5)));

				this->face.addVertices(vertices);

				this->face.addIndex(index + 0); this->face.addIndex(index + 1); this->face.addIndex(index + 3);
				this->face.addIndex(index + 0); this->face.addIndex(index + 3); this->face.addIndex(index + 2);

				auto alpha = 255;
				if (r >= 50) {

					alpha = ofMap(r, 50, 101, 255, 0);
				}

				alpha = ofMap(r, 0, 100, 255, 0);

				for (int i = 0; i < 4; i++) {

					this->face.addColor(ofColor(255, alpha));
				}

				if (noise_1 < 0.475) {

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

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

					this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha));
				}

				if (noise_2 < 0.475) {

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

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

					this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha));
				}

				if (noise_3 < 0.475) {

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

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

					this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha));
				}

				if (noise_4 < 0.475) {

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

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

					this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha));
				}
			}
		}
	}

	ofSeedRandom(39);
}

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

	this->cam.begin();

	ofRotateY(ofGetFrameNum() * 1.8);
	ofRotateX(ofGetFrameNum() * 1.2);

	ofSetLineWidth(3);

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

	this->cam.end();
}

//--------------------------------------------------------------
glm::vec3 ofApp::make_point(float R, float r, float u, float v) {

	// 数学デッサン教室 描いて楽しむ数学たち　P.31

	u *= DEG_TO_RAD;
	v *= DEG_TO_RAD;

	auto x = (R + r * cos(u)) * cos(v);
	auto y = (R + r * cos(u)) * sin(v);
	auto z = r * sin(u);

	return glm::vec3(x, y, z);
}


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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofEnableDepthTest();

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

}

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

void ofApp::update() {

this->face.clear();

this->line.clear();

float phi_deg_step = 3;

float theta_deg_step = 12;

float R = 250;

for (int base_r = 0; base_r <= 20; base_r += 3) {

int r = (base_r + ofGetFrameNum() * 3) % 100;

for (float phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) {

for (float theta_deg = 0; theta_deg < 360; theta_deg += theta_deg_step) {

auto noise_value = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg, phi_deg) * 0.05, ofGetFrameNum() * 0.02));

if (noise_value < 0.475) { continue; }

auto noise_1 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg - theta_deg_step, phi_deg) * 0.05, ofGetFrameNum() * 0.02));

auto noise_2 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg, phi_deg + phi_deg_step) * 0.05, ofGetFrameNum() * 0.02));

auto noise_3 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg, phi_deg - phi_deg_step) * 0.05, ofGetFrameNum() * 0.02));

auto noise_4 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg + theta_deg_step, phi_deg) * 0.05, ofGetFrameNum() * 0.02));

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

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5)));

vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5)));

vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5)));

vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5)));

this->face.addVertices(vertices);

this->face.addIndex(index + 0); this->face.addIndex(index + 1); this->face.addIndex(index + 3);

this->face.addIndex(index + 0); this->face.addIndex(index + 3); this->face.addIndex(index + 2);

auto alpha = 255;

if (r >= 50) {

alpha = ofMap(r, 50, 101, 255, 0);

}

alpha = ofMap(r, 0, 100, 255, 0);

for (int i = 0; i < 4; i++) {

this->face.addColor(ofColor(255, alpha));

}

if (noise_1 < 0.475) {

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

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

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

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

this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha));

}

if (noise_2 < 0.475) {

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

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

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

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

this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha));

}

if (noise_3 < 0.475) {

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

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

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

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

this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha));

}

if (noise_4 < 0.475) {

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

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

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

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

this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha));

}

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum() * 1.8);

ofRotateX(ofGetFrameNum() * 1.2);

ofSetLineWidth(3);

this->line.draw();

this->face.draw();

this->cam.end();

}

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

glm::vec3 ofApp::make_point(float R, float r, float u, float v) {

// 数学デッサン教室描いて楽しむ数学たち　P.31

u *= DEG_TO_RAD;

v *= DEG_TO_RAD;

auto x = (R + r * cos(u)) * cos(v);

auto y = (R + r * cos(u)) * sin(v);

auto z = r * sin(u);

return glm::vec3(x, y, z);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220116

2022年1月14日2022年1月14日

Rotate arrows. Draw by openFrameworks

[ Video ]

[ About ]
矢印を回転させる。

Rotate the arrow.

[ 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 draw_arrow(glm::vec3 location, glm::vec3 target, float size, ofColor fill_color, ofColor no_fill_color);

	ofEasyCam cam;
	glm::vec3 noise_seed;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

void draw_arrow(glm::vec3 location, glm::vec3 target, float size, ofColor fill_color, ofColor no_fill_color);

ofEasyCam cam;

glm::vec3 noise_seed;

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofSetLineWidth(3);
	ofEnableDepthTest();

	this->noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));
}

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

}

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

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

	auto size = 40;
	auto noise_seed = ofRandom(1000);
	for (int x = ofGetWidth() * -0.5 + size; x < ofGetWidth() * 0.5; x += size * 2) {

		for (int y = ofGetWidth() * -0.5 + size; y < ofGetWidth() * 0.5; y += size * 2) {

			for (int z = ofGetWidth() * -0.5 + size; z < ofGetWidth() * 0.5; z += size * 2) {

				auto location = glm::vec3(x, y, z);
				auto target = glm::vec3(x, y + 1, z);

				this->draw_arrow(location, target, size, ofColor(255), ofColor(0));
			}
		}
	}

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::draw_arrow(glm::vec3 location, glm::vec3 target, float size, ofColor fill_color, ofColor no_fill_color) {

	ofPushMatrix();
	ofTranslate(location);

	ofRotateZ(ofMap(ofNoise(this->noise_seed.z + ofGetFrameNum() * 0.01, location.x * 0.0003, location.y * 0.0003, location.z * 0.0003), 0, 1, -540, 540));
	ofRotateY(ofMap(ofNoise(this->noise_seed.y + ofGetFrameNum() * 0.01, location.x * 0.0003, location.y * 0.0003, location.z * 0.0003), 0, 1, -540, 540));
	ofRotateX(ofMap(ofNoise(this->noise_seed.x + ofGetFrameNum() * 0.01, location.x * 0.0003, location.y * 0.0003, location.z * 0.0003), 0, 1, -540, 540));

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

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

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

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

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

	ofPopMatrix();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(255);

ofSetLineWidth(3);

ofEnableDepthTest();

this->noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateY(ofGetFrameNum());

auto size = 40;

auto noise_seed = ofRandom(1000);

for (int x = ofGetWidth() * -0.5 + size; x < ofGetWidth() * 0.5; x += size * 2) {

for (int y = ofGetWidth() * -0.5 + size; y < ofGetWidth() * 0.5; y += size * 2) {

for (int z = ofGetWidth() * -0.5 + size; z < ofGetWidth() * 0.5; z += size * 2) {

auto location = glm::vec3(x, y, z);

auto target = glm::vec3(x, y + 1, z);

this->draw_arrow(location, target, size, ofColor(255), ofColor(0));

}

this->cam.end();

}

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

void ofApp::draw_arrow(glm::vec3 location, glm::vec3 target, float size, ofColor fill_color, ofColor no_fill_color) {

ofPushMatrix();

ofTranslate(location);

ofRotateZ(ofMap(ofNoise(this->noise_seed.z + ofGetFrameNum() * 0.01, location.x * 0.0003, location.y * 0.0003, location.z * 0.0003), 0, 1, -540, 540));

ofRotateY(ofMap(ofNoise(this->noise_seed.y + ofGetFrameNum() * 0.01, location.x * 0.0003, location.y * 0.0003, location.z * 0.0003), 0, 1, -540, 540));

ofRotateX(ofMap(ofNoise(this->noise_seed.x + ofGetFrameNum() * 0.01, location.x * 0.0003, location.y * 0.0003, location.z * 0.0003), 0, 1, -540, 540));

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

ofSetColor(fill_color);

ofFill();

ofBeginShape();

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

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

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

ofEndShape();

ofBeginShape();

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

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);

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);

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

ofEndShape();

ofSetColor(no_fill_color);

ofNoFill();

ofBeginShape();

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

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

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

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

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

ofEndShape();

ofBeginShape();

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

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);

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);

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

ofEndShape();

ofPopMatrix();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220114

2025年7月
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