noise – ページ 154 – プログラミング de 落描き

2021年9月26日

Big box and small boxes. Draw by openframeworks

[ Video ]

[ About ]
親となるランダムウォークと追随するランダムウォーク。

Parent random walk and following random walk.

[ 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) {};

	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 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) {};

ofEasyCam cam;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofEnableDepthTest();
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	int base_len = 100;
	int number_of_satellite = 380;
	int number_of_log = 25;

	auto base_noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));
	auto base_location = glm::vec3(ofMap(ofNoise(base_noise_seed.x, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -250, 250), ofMap(ofNoise(base_noise_seed.y, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -250, 250), 0);

	ofPushMatrix();
	ofTranslate(base_location);
	ofRotateY(ofMap(ofNoise(base_noise_seed.x, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -360, 360));
	ofRotateX(ofMap(ofNoise(base_noise_seed.y, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -360, 360));

	ofFill();
	ofSetColor(39);
	ofDrawBox(glm::vec3(), base_len * 0.85);

	ofNoFill();
	ofSetColor(239);
	ofDrawBox(glm::vec3(), base_len * 0.85 + 0.1);

	ofPopMatrix();

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

		float noise_seed_x = ofRandom(1000);
		float noise_seed_y = ofRandom(1000);
		auto location = glm::vec3(ofRandom(-1, 1), ofRandom(-1, 1), ofRandom(-1, 1));
		location = glm::normalize(location) * base_len * 1.25;
		auto prev_location = glm::vec3();

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

			auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed_y, (ofGetFrameNum() + k) * 0.001), 0, 1, -PI * 2, PI * 2), glm::vec3(0, 1, 0));
			auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed_x, (ofGetFrameNum() + k) * 0.001), 0, 1, -PI * 2, PI * 2), glm::vec3(1, 0, 0));
			auto tmp_base_location = glm::vec3(ofMap(ofNoise(base_noise_seed.x, (ofGetFrameNum() + k) * 0.005), 0, 1, -250, 250), ofMap(ofNoise(base_noise_seed.y, (ofGetFrameNum() + k) * 0.005), 0, 1, -250, 250), 0);
			auto draw_location = tmp_base_location + glm::vec4(location, 0) * rotation_y * rotation_x;

			if (k > 0) {

				ofSetLineWidth(0.5);
				ofSetColor(ofColor(39, ofMap(k, 0, number_of_log, 32, 255)));
				ofDrawLine(prev_location, draw_location);
			}

			prev_location = draw_location;
		}

		ofPushMatrix();
		ofTranslate(prev_location);
		ofRotateY(ofMap(ofNoise(noise_seed_y, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -PI * 2 * RAD_TO_DEG, PI * 2 * RAD_TO_DEG));
		ofRotateX(ofMap(ofNoise(noise_seed_x, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -PI * 2 * RAD_TO_DEG, PI * 2 * RAD_TO_DEG));
		
		ofSetLineWidth(1.5);

		ofFill();
		ofSetColor(239);
		ofDrawBox(glm::vec3(), base_len * 0.15);

		ofNoFill();
		ofSetColor(39);
		ofDrawBox(glm::vec3(), base_len * 0.15 + 0.1);

		ofPopMatrix();
	}

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

int base_len = 100;

int number_of_satellite = 380;

int number_of_log = 25;

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

auto base_location = glm::vec3(ofMap(ofNoise(base_noise_seed.x, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -250, 250), ofMap(ofNoise(base_noise_seed.y, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -250, 250), 0);

ofPushMatrix();

ofTranslate(base_location);

ofRotateY(ofMap(ofNoise(base_noise_seed.x, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -360, 360));

ofRotateX(ofMap(ofNoise(base_noise_seed.y, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -360, 360));

ofFill();

ofSetColor(39);

ofDrawBox(glm::vec3(), base_len * 0.85);

ofNoFill();

ofSetColor(239);

ofDrawBox(glm::vec3(), base_len * 0.85 + 0.1);

ofPopMatrix();

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

float noise_seed_x = ofRandom(1000);

float noise_seed_y = ofRandom(1000);

auto location = glm::vec3(ofRandom(-1, 1), ofRandom(-1, 1), ofRandom(-1, 1));

location = glm::normalize(location) * base_len * 1.25;

auto prev_location = glm::vec3();

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

auto rotation_y = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed_y, (ofGetFrameNum() + k) * 0.001), 0, 1, -PI * 2, PI * 2), glm::vec3(0, 1, 0));

auto rotation_x = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_seed_x, (ofGetFrameNum() + k) * 0.001), 0, 1, -PI * 2, PI * 2), glm::vec3(1, 0, 0));

auto tmp_base_location = glm::vec3(ofMap(ofNoise(base_noise_seed.x, (ofGetFrameNum() + k) * 0.005), 0, 1, -250, 250), ofMap(ofNoise(base_noise_seed.y, (ofGetFrameNum() + k) * 0.005), 0, 1, -250, 250), 0);

auto draw_location = tmp_base_location + glm::vec4(location, 0) * rotation_y * rotation_x;

if (k > 0) {

ofSetLineWidth(0.5);

ofSetColor(ofColor(39, ofMap(k, 0, number_of_log, 32, 255)));

ofDrawLine(prev_location, draw_location);

}

prev_location = draw_location;

}

ofPushMatrix();

ofTranslate(prev_location);

ofRotateY(ofMap(ofNoise(noise_seed_y, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -PI * 2 * RAD_TO_DEG, PI * 2 * RAD_TO_DEG));

ofRotateX(ofMap(ofNoise(noise_seed_x, (ofGetFrameNum() + number_of_log) * 0.005), 0, 1, -PI * 2 * RAD_TO_DEG, PI * 2 * RAD_TO_DEG));

ofSetLineWidth(1.5);

ofFill();

ofSetColor(239);

ofDrawBox(glm::vec3(), base_len * 0.15);

ofNoFill();

ofSetColor(39);

ofDrawBox(glm::vec3(), base_len * 0.15 + 0.1);

ofPopMatrix();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210926

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2021年9月24日2021年9月24日

Colorful torus. Draw by openFrameworks

[ Video ]

[ About ]
ループ内でofSeedRandom()を呼び出して同じランダム値を得る。

Call ofSeedRandom() in the loop to get the same random value.

[ 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;
};

#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;

};

#include "ofApp.h"

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

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

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

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

	ofSeedRandom(39);
}

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

	this->cam.begin();

	int v_span = 1;
	int u_span = 30;

	ofMesh face, line;
	ofColor color;
	line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);
	for (int v = 0; v <= 360; v += v_span) {

		bool flag = true;
		int u_start = v;
		int next_u = u_start + v_span;

		ofSeedRandom(39);
		for (int u = u_start; u < u_start + 360; u += u_span) {

			auto noise_param = ofRandom(1000);

			if (flag) {

				face.addVertex(this->make_point(230, 60, u, v));
				face.addVertex(this->make_point(230, 60, u + u_span, v));
				face.addVertex(this->make_point(230, 60, next_u + u_span, v + v_span));
				face.addVertex(this->make_point(230, 60, next_u, v + v_span));

				line.addVertex(this->make_point(230, 60, u, v));
				line.addVertex(this->make_point(230, 60, u + u_span, v));
				line.addVertex(this->make_point(230, 60, next_u + u_span, v + v_span));
				line.addVertex(this->make_point(230, 60, next_u, v + v_span));

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

					color.setHsb((int)ofMap(ofNoise(glm::vec4(face.getVertex(face.getNumVertices() - 4 + i) * 0.0005, noise_param + ofGetFrameNum() * 0.003)), 0, 1, 0, 255 * 6) % 255, 130, 255);
					face.addColor(color);
					line.addColor(ofColor(239));
				}

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

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

			next_u += u_span;
		    flag = !flag;
		}
	}

	face.drawFaces();
	line.drawWireframe();

	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());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetLineWidth(2);

ofEnableDepthTest();

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

int v_span = 1;

int u_span = 30;

ofMesh face, line;

ofColor color;

line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES);

for (int v = 0; v <= 360; v += v_span) {

bool flag = true;

int u_start = v;

int next_u = u_start + v_span;

ofSeedRandom(39);

for (int u = u_start; u < u_start + 360; u += u_span) {

auto noise_param = ofRandom(1000);

if (flag) {

face.addVertex(this->make_point(230, 60, u, v));

face.addVertex(this->make_point(230, 60, u + u_span, v));

face.addVertex(this->make_point(230, 60, next_u + u_span, v + v_span));

face.addVertex(this->make_point(230, 60, next_u, v + v_span));

line.addVertex(this->make_point(230, 60, u, v));

line.addVertex(this->make_point(230, 60, u + u_span, v));

line.addVertex(this->make_point(230, 60, next_u + u_span, v + v_span));

line.addVertex(this->make_point(230, 60, next_u, v + v_span));

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

color.setHsb((int)ofMap(ofNoise(glm::vec4(face.getVertex(face.getNumVertices() - 4 + i) * 0.0005, noise_param + ofGetFrameNum() * 0.003)), 0, 1, 0, 255 * 6) % 255, 130, 255);

face.addColor(color);

line.addColor(ofColor(239));

}

face.addIndex(face.getNumVertices() - 1); face.addIndex(face.getNumVertices() - 2); face.addIndex(face.getNumVertices() - 3);

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

line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 4);

line.addIndex(line.getNumVertices() - 2); line.addIndex(line.getNumVertices() - 3);

}

next_u += u_span;

flag = !flag;

}

face.drawFaces();

line.drawWireframe();

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/Insta20210924

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Amazon

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2021年9月20日

Arrow moving up and down. Draw by openFrameworks

[ Video ]

[ About ]
ofNosie()の引数に渡すフレーム番号を-1することで、前フレームの値を取得可能となります。

By setting the frame number passed as the argument ofNosie() to -1, it is possible to obtain the value of the previous frame.

[ 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::vec2 location, glm::vec2 target, float size, ofColor fill_color, ofColor no_fill_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 windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

void draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor fill_color, ofColor no_fill_color);

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);
	ofSetLineWidth(1);
}

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

	ofSeedRandom(39);
}

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

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

	auto size = 20;
	auto noise_seed = ofRandom(1000);
	for (int x = ofGetWidth() * -0.5 + size; x < ofGetWidth() * 0.5; x += size) {

		auto location = glm::vec2(x, ofMap(ofNoise(noise_seed, x * 0.001 + ofGetFrameNum() * 0.008), 0, 1, ofGetHeight() * -0.5 + 100, ofGetHeight() * 0.5 - 100));
		auto prev_location = glm::vec2(x, ofMap(ofNoise(noise_seed, x * 0.001 + (ofGetFrameNum() - 1) * 0.008), 0, 1, ofGetHeight() * -0.5 + 100, ofGetHeight() * 0.5 - 100));

		this->draw_arrow(prev_location, location, size, ofColor(39), location.y > prev_location.y ? ofColor(239, 39, 39) : ofColor(39, 39, 239));
		
	}
}

//--------------------------------------------------------------
void ofApp::draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor fill_color, ofColor no_fill_color) {

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

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

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

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

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetLineWidth(1);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

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

auto size = 20;

auto noise_seed = ofRandom(1000);

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

auto location = glm::vec2(x, ofMap(ofNoise(noise_seed, x * 0.001 + ofGetFrameNum() * 0.008), 0, 1, ofGetHeight() * -0.5 + 100, ofGetHeight() * 0.5 - 100));

auto prev_location = glm::vec2(x, ofMap(ofNoise(noise_seed, x * 0.001 + (ofGetFrameNum() - 1) * 0.008), 0, 1, ofGetHeight() * -0.5 + 100, ofGetHeight() * 0.5 - 100));

this->draw_arrow(prev_location, location, size, ofColor(39), location.y > prev_location.y ? ofColor(239, 39, 39) : ofColor(39, 39, 239));

}

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

void ofApp::draw_arrow(glm::vec2 location, glm::vec2 target, float size, ofColor fill_color, ofColor no_fill_color) {

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

ofSetColor(fill_color);

ofFill();

ofBeginShape();

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

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

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

ofEndShape();

ofBeginShape();

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

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

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

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

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

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

ofEndShape();

ofBeginShape();

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

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

ofEndShape();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210920

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