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2021年7月11日2021年7月11日

Arrow by arrows. Draw by openFrameworks

[ Video ]

[ About ]
座標と半径を使ってお互いが被らないように隙間を埋める。
distance(my, other) < my.radisu + other.radius. Use coordinates and radius to fill in the gaps so that they don't cover each other. distance(my, other) < my.radisu + other.radius. [ 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);

	ofFbo fbo;
	ofPixels pix;

	vector<pair<glm::vec2, float>> arrow_list;
	int count;
};

#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);

ofFbo fbo;

ofPixels pix;

vector<pair<glm::vec2, float>> arrow_list;

int count;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofSetLineWidth(2);

	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	this->count = 125;
}

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

	ofSeedRandom(39);

	this->fbo.begin();
	ofClear(0);
	ofSetColor(0);

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

	for (int k = 0; k < 3; k++) {

		auto deg = ofGetFrameNum() + k * 120;

		auto location = glm::vec2(230 * cos(deg * DEG_TO_RAD), 230 * sin(deg * DEG_TO_RAD));
		auto next = glm::vec2(230 * cos((deg + 1) * DEG_TO_RAD), 230 * sin((deg + 1) *DEG_TO_RAD));

		this->draw_arrow(location, next, 200, ofColor(0), ofColor(0));
	}

	this->fbo.end();
	this->fbo.readToPixels(this->pix);
}

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

	this->arrow_list.clear();

	while (this->arrow_list .size() < this->count) {

		int x = ofRandom(ofGetWidth());
		int y = ofRandom(ofGetHeight());

		ofColor pix_color = this->pix.getColor(x, y);
		if (pix_color != ofColor(0)) {

			continue;
		}

		ofColor color;
		color.setHsb(ofRandom(255), 255, 255);
		glm::vec2 point = glm::vec2(x, y);
		float radius = ofRandom(8, 18);

		bool flag = true;
		for (int i = 0; i < this->arrow_list.size(); i++) {

			if (glm::distance(point, this->arrow_list[i].first) < this->arrow_list[i].second + radius) {

				flag = false;
				break;
			}
		}

		if (flag) {

			this->arrow_list.push_back(make_pair(point, radius));
		}
	}

	for (int arrow_index = 0; arrow_index < this->arrow_list.size(); arrow_index++) {

		glm::vec2 location = this->arrow_list[arrow_index].first;
		float radius = this->arrow_list[arrow_index].second;

		auto noise_angle = ofMap(ofNoise(glm::vec3(location * 0.005, ofGetFrameNum() * 0.001)), 0, 1, 0, PI);
		this->draw_arrow(location, location + glm::vec2(cos(noise_angle), sin(noise_angle)), radius * 1.2, ofColor(39), ofColor(255));
	}

	ofPopMatrix();
}

//--------------------------------------------------------------
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());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(0);

ofSetLineWidth(2);

this->fbo.allocate(ofGetWidth(), ofGetHeight());

this->count = 125;

}

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

void ofApp::update() {

ofSeedRandom(39);

this->fbo.begin();

ofClear(0);

ofSetColor(0);

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

for (int k = 0; k < 3; k++) {

auto deg = ofGetFrameNum() + k * 120;

auto location = glm::vec2(230 * cos(deg * DEG_TO_RAD), 230 * sin(deg * DEG_TO_RAD));

auto next = glm::vec2(230 * cos((deg + 1) * DEG_TO_RAD), 230 * sin((deg + 1) *DEG_TO_RAD));

this->draw_arrow(location, next, 200, ofColor(0), ofColor(0));

}

this->fbo.end();

this->fbo.readToPixels(this->pix);

}

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

void ofApp::draw() {

this->arrow_list.clear();

while (this->arrow_list .size() < this->count) {

int x = ofRandom(ofGetWidth());

int y = ofRandom(ofGetHeight());

ofColor pix_color = this->pix.getColor(x, y);

if (pix_color != ofColor(0)) {

continue;

}

ofColor color;

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

glm::vec2 point = glm::vec2(x, y);

float radius = ofRandom(8, 18);

bool flag = true;

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

if (glm::distance(point, this->arrow_list[i].first) < this->arrow_list[i].second + radius) {

flag = false;

break;

}

if (flag) {

this->arrow_list.push_back(make_pair(point, radius));

}

for (int arrow_index = 0; arrow_index < this->arrow_list.size(); arrow_index++) {

glm::vec2 location = this->arrow_list[arrow_index].first;

float radius = this->arrow_list[arrow_index].second;

auto noise_angle = ofMap(ofNoise(glm::vec3(location * 0.005, ofGetFrameNum() * 0.001)), 0, 1, 0, PI);

this->draw_arrow(location, location + glm::vec2(cos(noise_angle), sin(noise_angle)), radius * 1.2, ofColor(39), ofColor(255));

}

ofPopMatrix();

}

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

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/Insta20210711

2021年7月10日

Twisting String. Draw by openFrameworks

[ Video ]

[ About ]
文字の座標を回転させる。
ofTrueTypeFont.getStringAsPoints()で取得した座標にglm::highp_mat4で回転した座標を計算する。

Rotate the coordinates of a character.
Calculate the coordinates rotated by glm::highp_mat4 to the coordinates retrieved by ofTrueTypeFont.getStringAsPoints().

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

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

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

	ofEasyCam cam;

	float font_size;
	ofTrueTypeFont font;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofEasyCam cam;

float font_size;

ofTrueTypeFont font;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);
	ofSetLineWidth(1.5);
	ofEnableDepthTest();

	this->font_size = 80;
	this->font.loadFont("fonts/Kazesawa-Bold.ttf", this->font_size, true, true, true);
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();
	ofRotateX(180);

	string word = "Twisting String";
	int sample_count = 180;
	auto noise_param = ofRandom(1000);
	auto word_size = this->font.getStringBoundingBox(word, 0, 0);
	vector<ofPath> word_path = this->font.getStringAsPoints(word, true, false);

	for (int i = 0; i < 2; i++) {

		ofRotateX(i * 180);
		for (int word_index = 0; word_index < word_path.size(); word_index++) {

			vector<ofPolyline> outline = word_path[word_index].getOutline();

			ofBeginShape();
			for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

				if (outline_index != 0) { ofNextContour(true); }

				auto vertices = outline[outline_index].getResampledByCount(sample_count).getVertices();
				for (auto& vertex : vertices) {

					auto location = vertex - glm::vec3(word_size.getWidth() * 0.5, -word_size.getHeight() * 0.5, 50);
					auto rotation = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_param, location.x * 0.001 + ofGetFrameNum() * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(1, 0, 0));
					location = glm::vec4(location, 0) * rotation;

					ofVertex(location);
				}
			}
			ofEndShape();
		}
	}

	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);

ofSetColor(39);

ofSetLineWidth(1.5);

ofEnableDepthTest();

this->font_size = 80;

this->font.loadFont("fonts/Kazesawa-Bold.ttf", this->font_size, true, true, true);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(180);

string word = "Twisting String";

int sample_count = 180;

auto noise_param = ofRandom(1000);

auto word_size = this->font.getStringBoundingBox(word, 0, 0);

vector<ofPath> word_path = this->font.getStringAsPoints(word, true, false);

for (int i = 0; i < 2; i++) {

ofRotateX(i * 180);

for (int word_index = 0; word_index < word_path.size(); word_index++) {

vector<ofPolyline> outline = word_path[word_index].getOutline();

ofBeginShape();

for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

if (outline_index != 0) { ofNextContour(true); }

auto vertices = outline[outline_index].getResampledByCount(sample_count).getVertices();

for (auto& vertex : vertices) {

auto location = vertex - glm::vec3(word_size.getWidth() * 0.5, -word_size.getHeight() * 0.5, 50);

auto rotation = glm::rotate(glm::mat4(), ofMap(ofNoise(noise_param, location.x * 0.001 + ofGetFrameNum() * 0.005), 0, 1, -PI * 2, PI * 2), glm::vec3(1, 0, 0));

location = glm::vec4(location, 0) * rotation;

ofVertex(location);

}

ofEndShape();

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210710

2021年7月9日

RGB Arrow. Draw by openFrameworks

[ Video ]

[ About ]
モデルナのワクチン接種１回目。本日は昨日の改造で。

The first vaccination for Moderna. Today, with yesterday’s modifications.

[ 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);

	vector<glm::vec2> location_list;
	vector<float> angle_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) {};

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

vector<glm::vec2> location_list;

vector<float> angle_list;

vector<ofColor> color_list;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(2);
	ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER);

	for (int x = -300; x <= 300; x += 20) {

		for (int y = -300; y <= 300; y += 20) {

			this->location_list.push_back(glm::vec2(x, y));
			this->angle_list.push_back(0);
			this->color_list.push_back(ofColor(0));
		}
	}
}

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

	ofSeedRandom(39);

	vector<ofColor> base_color_list;
	base_color_list.push_back(ofColor(255, 0, 0));
	base_color_list.push_back(ofColor(0, 255, 0));
	base_color_list.push_back(ofColor(0, 0, 255));

	for (int k = 0; k < base_color_list.size(); k++) {

		auto noise_param = glm::vec2(ofRandom(1000), ofRandom(1000));
		auto location = glm::vec2(ofMap(ofNoise(noise_param.x, ofGetFrameNum() * 0.03), 0, 1, -400, 400), ofMap(ofNoise(noise_param.y, ofGetFrameNum() * 0.03), 0, 1, -400, 400));
		auto next = glm::vec2(ofMap(ofNoise(noise_param.x, (ofGetFrameNum() + 1) * 0.03), 0, 1, -400, 400), ofMap(ofNoise(noise_param.y, (ofGetFrameNum() + 1) * 0.03), 0, 1, -400, 400));
		auto angle = std::atan2(next.y - location.y, next.x - location.x);

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

			auto distance = glm::distance(this->location_list[i], location);
			if (distance < 40) {

				this->angle_list[i] = angle;
				this->color_list[i] += base_color_list[k];
			}
		}
	}

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

		this->color_list[i].r = this->color_list[i].r > 6 ? this->color_list[i].r - 6 : 0;
		this->color_list[i].g = this->color_list[i].g > 6 ? this->color_list[i].g - 6 : 0;
		this->color_list[i].b = this->color_list[i].b > 6 ? this->color_list[i].b - 6 : 0;
	}
}

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

	ofTranslate(ofGetWindowSize() * 0.5);

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

		ofColor tmp_color = this->color_list[i];
		tmp_color.r = tmp_color.r > 128 ? 255 : ofMap(tmp_color.r, 0, 128, 0, 255);
		tmp_color.g = tmp_color.g > 128 ? 255 : ofMap(tmp_color.g, 0, 128, 0, 255);
		tmp_color.b = tmp_color.b > 128 ? 255 : ofMap(tmp_color.b, 0, 128, 0, 255);
		this->draw_arrow(this->location_list[i], this->location_list[i] + glm::vec2(cos(this->angle_list[i]), sin(this->angle_list[i])), 13, ofColor(255), tmp_color);
	}
}

//--------------------------------------------------------------
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());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetLineWidth(2);

ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER);

for (int x = -300; x <= 300; x += 20) {

for (int y = -300; y <= 300; y += 20) {

this->location_list.push_back(glm::vec2(x, y));

this->angle_list.push_back(0);

this->color_list.push_back(ofColor(0));

}

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

void ofApp::update() {

ofSeedRandom(39);

vector<ofColor> base_color_list;

base_color_list.push_back(ofColor(255, 0, 0));

base_color_list.push_back(ofColor(0, 255, 0));

base_color_list.push_back(ofColor(0, 0, 255));

for (int k = 0; k < base_color_list.size(); k++) {

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

auto location = glm::vec2(ofMap(ofNoise(noise_param.x, ofGetFrameNum() * 0.03), 0, 1, -400, 400), ofMap(ofNoise(noise_param.y, ofGetFrameNum() * 0.03), 0, 1, -400, 400));

auto next = glm::vec2(ofMap(ofNoise(noise_param.x, (ofGetFrameNum() + 1) * 0.03), 0, 1, -400, 400), ofMap(ofNoise(noise_param.y, (ofGetFrameNum() + 1) * 0.03), 0, 1, -400, 400));

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

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

auto distance = glm::distance(this->location_list[i], location);

if (distance < 40) {

this->angle_list[i] = angle;

this->color_list[i] += base_color_list[k];

}

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

this->color_list[i].r = this->color_list[i].r > 6 ? this->color_list[i].r - 6 : 0;

this->color_list[i].g = this->color_list[i].g > 6 ? this->color_list[i].g - 6 : 0;

this->color_list[i].b = this->color_list[i].b > 6 ? this->color_list[i].b - 6 : 0;

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

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

ofColor tmp_color = this->color_list[i];

tmp_color.r = tmp_color.r > 128 ? 255 : ofMap(tmp_color.r, 0, 128, 0, 255);

tmp_color.g = tmp_color.g > 128 ? 255 : ofMap(tmp_color.g, 0, 128, 0, 255);

tmp_color.b = tmp_color.b > 128 ? 255 : ofMap(tmp_color.b, 0, 128, 0, 255);

this->draw_arrow(this->location_list[i], this->location_list[i] + glm::vec2(cos(this->angle_list[i]), sin(this->angle_list[i])), 13, ofColor(255), tmp_color);

}

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

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/Insta20210709

[ Kinako ]

2025年2月
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