2020年8月 – ページ 7 – プログラミング de 落描き

2020年8月13日2020年8月13日

Polygon generater. Draw by openFrameworks

[ Video ]

[ About ]
Polygon generater.

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofxBox2d.h"

class ofApp : public ofBaseApp {

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

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

	void sort(vector<glm::vec2>& vertices);

	ofxBox2d box2d;
	
	vector<ofColor> color_list;

	vector<glm::vec2> walker_list;
	vector<glm::vec2> walker_noise_seed_list;

	vector<shared_ptr<ofxBox2dPolygon>> polygon_list;
	vector<float> polygon_lile_list;
	vector<ofColor> polygon_color_list;
};

#pragma once

#include "ofMain.h"

#include "ofxBox2d.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {}

void keyReleased(int key) {}

void mouseMoved(int x, int y) {}

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

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

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

void mouseEntered(int x, int y) {}

void mouseExited(int x, int y) {}

void windowResized(int w, int h) {}

void dragEvent(ofDragInfo dragInfo) {}

void gotMessage(ofMessage msg) {}

void sort(vector<glm::vec2>& vertices);

ofxBox2d box2d;

vector<ofColor> color_list;

vector<glm::vec2> walker_list;

vector<glm::vec2> walker_noise_seed_list;

vector<shared_ptr<ofxBox2dPolygon>> polygon_list;

vector<float> polygon_lile_list;

vector<ofColor> polygon_color_list;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(2);

	this->box2d.init();
	this->box2d.setGravity(0, 50);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();

	ofColor color;
	vector<int> hex_list = { 0xef476f, 0xffd166, 0x06d6a0, 0x118ab2, 0x073b4c };
	for (auto hex : hex_list) {

		color.setHex(hex);
		this->color_list.push_back(color);
	}

	for (int i = 0; i < 15; i++) {

		this->walker_list.push_back(glm::vec2());
		this->walker_noise_seed_list.push_back(glm::vec2(ofRandom(1000), ofRandom(1000)));
	}
}

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

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

		this->walker_list[i] = glm::vec2(
			ofMap(ofNoise(this->walker_noise_seed_list[i].x, ofGetFrameNum() * 0.005), 0, 1, 0, ofGetWidth()),
			ofMap(ofNoise(this->walker_noise_seed_list[i].y, ofGetFrameNum() * 0.005), 0, 1, 0, ofGetHeight() * 0.25)
		);
	}

	if (ofGetFrameNum() % 3 == 0) {

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

			vector<glm::vec2> vertices;
			for (int k = i + 1; k < this->walker_list.size(); k++) {

				if (glm::distance(this->walker_list[i], this->walker_list[k]) < 50) {

					vertices.push_back(this->walker_list[k] - this->walker_list[i]);
				}
			}

			if (vertices.size() >= 2) {

				this->sort(vertices);
				for (int m = 0; m < vertices.size() - 1; m++) {

					auto polygon = make_shared<ofxBox2dPolygon>();

					polygon->addVertex(this->walker_list[i].x, this->walker_list[i].y);
					polygon->addVertex(this->walker_list[i].x + vertices[m].x, this->walker_list[i].y + vertices[m].y);
					polygon->addVertex(this->walker_list[i].x + vertices[m + 1].x, this->walker_list[i].y + vertices[m + 1].y);

					polygon->setPhysics(1.0, 0.7, 0.3);
					polygon->create(box2d.getWorld());

					this->polygon_list.push_back(polygon);
					this->polygon_lile_list.push_back(255);
					this->polygon_color_list.push_back(this->color_list[(int)ofRandom(this->color_list.size())]);
				}
			}
		}
	}

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

		this->polygon_lile_list[i] -= 1;

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

			this->polygon_list.erase(this->polygon_list.begin() + i);
			this->polygon_lile_list.erase(this->polygon_lile_list.begin() + i);
			this->polygon_color_list.erase(this->polygon_color_list.begin() + i);
		}
	}

	this->box2d.update();
}

//--------------------------------------------------------------
void ofApp::draw() {
	
	ofSetColor(39);
	for (int i = 0; i < this->walker_list.size(); i++) {

		ofDrawCircle(this->walker_list[i], 4);

		for (int k = i + 1; k < this->walker_list.size(); k++) {

			if (glm::distance(this->walker_list[i], this->walker_list[k]) < 50) {

				ofDrawLine(this->walker_list[i], this->walker_list[k]);
			}
		}
	}

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

		if (this->polygon_lile_list[i] > 128) {

			ofSetColor(this->polygon_color_list[i]);
		}
		else {

			ofSetColor(this->polygon_color_list[i], ofMap(this->polygon_lile_list[i], 128, 0, 255, 0));
		}
		this->polygon_list[i]->draw();
	}
}

//--------------------------------------------------------------
void ofApp::sort(vector<glm::vec2>& vertices) {

	glm::vec2 tmp;
	for (int i = 0; i < vertices.size(); i++) {

		for (int k = i + 1; k < vertices.size(); k++) {

			if (vertices[i].x < vertices[k].x) {

				tmp = vertices[i];
				vertices[i] = vertices[k];
				vertices[k] = tmp;
			}
		}
	}
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetLineWidth(2);

this->box2d.init();

this->box2d.setGravity(0, 50);

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

ofColor color;

vector<int> hex_list = { 0xef476f, 0xffd166, 0x06d6a0, 0x118ab2, 0x073b4c };

for (auto hex : hex_list) {

color.setHex(hex);

this->color_list.push_back(color);

}

for (int i = 0; i < 15; i++) {

this->walker_list.push_back(glm::vec2());

this->walker_noise_seed_list.push_back(glm::vec2(ofRandom(1000), ofRandom(1000)));

}

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

void ofApp::update() {

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

this->walker_list[i] = glm::vec2(

ofMap(ofNoise(this->walker_noise_seed_list[i].x, ofGetFrameNum() * 0.005), 0, 1, 0, ofGetWidth()),

ofMap(ofNoise(this->walker_noise_seed_list[i].y, ofGetFrameNum() * 0.005), 0, 1, 0, ofGetHeight() * 0.25)

);

}

if (ofGetFrameNum() % 3 == 0) {

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

vector<glm::vec2> vertices;

for (int k = i + 1; k < this->walker_list.size(); k++) {

if (glm::distance(this->walker_list[i], this->walker_list[k]) < 50) {

vertices.push_back(this->walker_list[k] - this->walker_list[i]);

}

if (vertices.size() >= 2) {

this->sort(vertices);

for (int m = 0; m < vertices.size() - 1; m++) {

auto polygon = make_shared<ofxBox2dPolygon>();

polygon->addVertex(this->walker_list[i].x, this->walker_list[i].y);

polygon->addVertex(this->walker_list[i].x + vertices[m].x, this->walker_list[i].y + vertices[m].y);

polygon->addVertex(this->walker_list[i].x + vertices[m + 1].x, this->walker_list[i].y + vertices[m + 1].y);

polygon->setPhysics(1.0, 0.7, 0.3);

polygon->create(box2d.getWorld());

this->polygon_list.push_back(polygon);

this->polygon_lile_list.push_back(255);

this->polygon_color_list.push_back(this->color_list[(int)ofRandom(this->color_list.size())]);

}

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

this->polygon_lile_list[i] -= 1;

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

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

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

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

}

this->box2d.update();

}

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

void ofApp::draw() {

ofSetColor(39);

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

ofDrawCircle(this->walker_list[i], 4);

for (int k = i + 1; k < this->walker_list.size(); k++) {

if (glm::distance(this->walker_list[i], this->walker_list[k]) < 50) {

ofDrawLine(this->walker_list[i], this->walker_list[k]);

}

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

if (this->polygon_lile_list[i] > 128) {

ofSetColor(this->polygon_color_list[i]);

}

else {

ofSetColor(this->polygon_color_list[i], ofMap(this->polygon_lile_list[i], 128, 0, 255, 0));

}

this->polygon_list[i]->draw();

}

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

void ofApp::sort(vector<glm::vec2>& vertices) {

glm::vec2 tmp;

for (int i = 0; i < vertices.size(); i++) {

for (int k = i + 1; k < vertices.size(); k++) {

if (vertices[i].x < vertices[k].x) {

tmp = vertices[i];

vertices[i] = vertices[k];

vertices[k] = tmp;

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200813

2020年8月12日2020年8月12日

RGB Boxes. Draw by openFrameworks

[ Video ]

[ About ]
RGB Boxes.

[ 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;
	ofMesh frame;
};

#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;

ofMesh frame;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(3);
	ofEnableDepthTest();
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY);

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

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

	ofSeedRandom(39);

	this->frame.clear();
	vector<ofColor> color_list = { ofColor(255, 0, 0), ofColor(0, 255, 0), ofColor(0, 0, 255) };

	for (int len = 100; len <= 250; len += 150) {
		
		auto noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));
		for (int i = 0; i < color_list.size(); i++) {

			auto angle_x = ofMap(ofNoise(noise_seed.x, i * 0.008 + ofGetFrameNum() * 0.0035), 0, 1, -PI, PI);
			auto angle_y = ofMap(ofNoise(noise_seed.y, i * 0.008 + ofGetFrameNum() * 0.0035), 0, 1, -PI, PI);
			auto angle_z = ofMap(ofNoise(noise_seed.z, i * 0.008 + ofGetFrameNum() * 0.0035), 0, 1, -PI, PI);

			auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0));
			auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0));
			auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

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

			vertices.push_back(glm::vec3(len * -0.5, len * 0.5, len * -0.5));
			vertices.push_back(glm::vec3(len * 0.5, len * 0.5, len * -0.5));
			vertices.push_back(glm::vec3(len * 0.5, len * 0.5, len * 0.5));
			vertices.push_back(glm::vec3(len * -0.5, len * 0.5, len * 0.5));

			vertices.push_back(glm::vec3(len * -0.5, len * -0.5, len * -0.5));
			vertices.push_back(glm::vec3(len * 0.5, len * -0.5, len * -0.5));
			vertices.push_back(glm::vec3(len * 0.5, len * -0.5, len * 0.5));
			vertices.push_back(glm::vec3(len * -0.5, len * -0.5, len * 0.5));

			for (auto& vertex : vertices) {

				vertex = glm::vec4(vertex, 0) * rotation_z * rotation_y * rotation_x;
				this->frame.addColor(color_list[i]);
			}

			this->frame.addVertices(vertices);

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

			this->frame.addIndex(index + 4); this->frame.addIndex(index + 5);
			this->frame.addIndex(index + 5); this->frame.addIndex(index + 6);
			this->frame.addIndex(index + 6); this->frame.addIndex(index + 7);
			this->frame.addIndex(index + 7); this->frame.addIndex(index + 4);

			this->frame.addIndex(index + 0); this->frame.addIndex(index + 4);
			this->frame.addIndex(index + 1); this->frame.addIndex(index + 5);
			this->frame.addIndex(index + 2); this->frame.addIndex(index + 6);
			this->frame.addIndex(index + 3); this->frame.addIndex(index + 7);
		}
	}
}

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

	this->cam.begin();

	this->frame.drawWireframe();

	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);

ofSetLineWidth(3);

ofEnableDepthTest();

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY);

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->frame.clear();

vector<ofColor> color_list = { ofColor(255, 0, 0), ofColor(0, 255, 0), ofColor(0, 0, 255) };

for (int len = 100; len <= 250; len += 150) {

auto noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));

for (int i = 0; i < color_list.size(); i++) {

auto angle_x = ofMap(ofNoise(noise_seed.x, i * 0.008 + ofGetFrameNum() * 0.0035), 0, 1, -PI, PI);

auto angle_y = ofMap(ofNoise(noise_seed.y, i * 0.008 + ofGetFrameNum() * 0.0035), 0, 1, -PI, PI);

auto angle_z = ofMap(ofNoise(noise_seed.z, i * 0.008 + ofGetFrameNum() * 0.0035), 0, 1, -PI, PI);

auto rotation_x = glm::rotate(glm::mat4(), angle_x, glm::vec3(1, 0, 0));

auto rotation_y = glm::rotate(glm::mat4(), angle_y, glm::vec3(0, 1, 0));

auto rotation_z = glm::rotate(glm::mat4(), angle_z, glm::vec3(0, 0, 1));

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

vector<glm::vec3> vertices;

vertices.push_back(glm::vec3(len * -0.5, len * 0.5, len * -0.5));

vertices.push_back(glm::vec3(len * 0.5, len * 0.5, len * -0.5));

vertices.push_back(glm::vec3(len * 0.5, len * 0.5, len * 0.5));

vertices.push_back(glm::vec3(len * -0.5, len * 0.5, len * 0.5));

vertices.push_back(glm::vec3(len * -0.5, len * -0.5, len * -0.5));

vertices.push_back(glm::vec3(len * 0.5, len * -0.5, len * -0.5));

vertices.push_back(glm::vec3(len * 0.5, len * -0.5, len * 0.5));

vertices.push_back(glm::vec3(len * -0.5, len * -0.5, len * 0.5));

for (auto& vertex : vertices) {

vertex = glm::vec4(vertex, 0) * rotation_z * rotation_y * rotation_x;

this->frame.addColor(color_list[i]);

}

this->frame.addVertices(vertices);

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

this->frame.addIndex(index + 1); this->frame.addIndex(index + 2);

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

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

this->frame.addIndex(index + 4); this->frame.addIndex(index + 5);

this->frame.addIndex(index + 5); this->frame.addIndex(index + 6);

this->frame.addIndex(index + 6); this->frame.addIndex(index + 7);

this->frame.addIndex(index + 7); this->frame.addIndex(index + 4);

this->frame.addIndex(index + 0); this->frame.addIndex(index + 4);

this->frame.addIndex(index + 1); this->frame.addIndex(index + 5);

this->frame.addIndex(index + 2); this->frame.addIndex(index + 6);

this->frame.addIndex(index + 3); this->frame.addIndex(index + 7);

}

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

void ofApp::draw() {

this->cam.begin();

this->frame.drawWireframe();

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200812

2020年8月11日2020年8月11日

Text by reflective lines. Draw by openFrameworks

[ Video ]

[ About ]
反射する線による文字。

Text by reflective lines.

[ 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) {};

	int number_of_agent;
	int len_of_tail;
	float speed_param;
	vector<deque<glm::vec2>> logs;
	vector<glm::vec2> directions;
	vector<ofColor> colors;

	ofFbo fbo;
	ofPixels pixels;
};

#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) {};

int number_of_agent;

int len_of_tail;

float speed_param;

vector<deque<glm::vec2>> logs;

vector<glm::vec2> directions;

vector<ofColor> colors;

ofFbo fbo;

ofPixels pixels;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);
	ofSetLineWidth(2);

	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY);

	ofColor color;
	vector<ofColor> color_base_list;
	vector<int> hex_list = { 0xef476f, 0xffd166, 0x06d6a0, 0x118ab2, 0x073b4c };
	for (auto hex : hex_list) {

		color.setHex(hex);
		color_base_list.push_back(color);
	}

	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	this->fbo.begin();
	ofClear(0);

	ofTrueTypeFont font;
	font.loadFont("fonts/Kazesawa-bold.ttf", 320, true, true, true);
	string word = "AB";
	font.drawString(word, ofGetWidth() * 0.5 - font.stringWidth(word) * 0.5, ofGetHeight() * 0.5 - font.stringHeight(word) * 0.05);
	word = "CD";
	font.drawString(word, ofGetWidth() * 0.5 - font.stringWidth(word) * 0.5, ofGetHeight() * 0.5 + font.stringHeight(word) * 1.05);

	this->fbo.end();
	this->fbo.readToPixels(this->pixels);

	this->number_of_agent = 350;
	this->len_of_tail = 30;
	while (this->logs.size() < this->number_of_agent) {

		int x = ofRandom(ofGetWidth());
		int y = ofRandom(ofGetHeight());
		if (this->pixels.getColor(x, y) != ofColor(0, 0)) {

			deque<glm::vec2> log;
			log.push_front(glm::vec2(x, y));
			this->logs.push_back(log);
			this->directions.push_back(glm::normalize(glm::vec2(ofRandom(-1, 1), ofRandom(-1, 1))));
			this->colors.push_back(color_base_list[(int)ofRandom(color_base_list.size())]);
		}
	}
}

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

	if (ofGetFrameNum() % 60 == 0) {

		while (true) {
		
			float tmp = ofRandom(1);
			if (abs(this->speed_param - tmp) > 0.25) {

				this->speed_param = tmp;
				break;
			}

		}
	}

	for (int i = 0; i < this->number_of_agent; i++) {

		glm::vec2 future = this->logs[i].front() + this->directions[i] * 5 * this->speed_param;
		int x = future.x;
		int y = future.y;

		while (this->pixels.getColor(x, y) == ofColor(0, 0)) {

			this->directions[i] = glm::normalize(glm::vec2(ofRandom(-1, 1), ofRandom(-1, 1)));

			future = this->logs[i].front() + this->directions[i] * 10 * this->speed_param;
			x = future.x;
			y = future.y;
		}

		this->logs[i].push_front(future);
		while (this->logs[i].size() > this->len_of_tail) {

			this->logs[i].pop_back();
		}
	}
}

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

	for (int i = 0; i < this->number_of_agent; i++) {

		ofSetColor(this->colors[i]);
		for (int l = 0; l < this->logs[i].size() - 1; l++) {

			ofDrawLine(this->logs[i][l], this->logs[i][l + 1]);
		}
	}
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(39);

ofSetLineWidth(2);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_MULTIPLY);

ofColor color;

vector<ofColor> color_base_list;

vector<int> hex_list = { 0xef476f, 0xffd166, 0x06d6a0, 0x118ab2, 0x073b4c };

for (auto hex : hex_list) {

color.setHex(hex);

color_base_list.push_back(color);

}

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

this->fbo.begin();

ofClear(0);

ofTrueTypeFont font;

font.loadFont("fonts/Kazesawa-bold.ttf", 320, true, true, true);

string word = "AB";

font.drawString(word, ofGetWidth() * 0.5 - font.stringWidth(word) * 0.5, ofGetHeight() * 0.5 - font.stringHeight(word) * 0.05);

word = "CD";

font.drawString(word, ofGetWidth() * 0.5 - font.stringWidth(word) * 0.5, ofGetHeight() * 0.5 + font.stringHeight(word) * 1.05);

this->fbo.end();

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

this->number_of_agent = 350;

this->len_of_tail = 30;

while (this->logs.size() < this->number_of_agent) {

int x = ofRandom(ofGetWidth());

int y = ofRandom(ofGetHeight());

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

deque<glm::vec2> log;

log.push_front(glm::vec2(x, y));

this->logs.push_back(log);

this->directions.push_back(glm::normalize(glm::vec2(ofRandom(-1, 1), ofRandom(-1, 1))));

this->colors.push_back(color_base_list[(int)ofRandom(color_base_list.size())]);

}

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

void ofApp::update() {

if (ofGetFrameNum() % 60 == 0) {

while (true) {

float tmp = ofRandom(1);

if (abs(this->speed_param - tmp) > 0.25) {

this->speed_param = tmp;

break;

}

for (int i = 0; i < this->number_of_agent; i++) {

glm::vec2 future = this->logs[i].front() + this->directions[i] * 5 * this->speed_param;

int x = future.x;

int y = future.y;

while (this->pixels.getColor(x, y) == ofColor(0, 0)) {

this->directions[i] = glm::normalize(glm::vec2(ofRandom(-1, 1), ofRandom(-1, 1)));

future = this->logs[i].front() + this->directions[i] * 10 * this->speed_param;

x = future.x;

y = future.y;

}

this->logs[i].push_front(future);

while (this->logs[i].size() > this->len_of_tail) {

this->logs[i].pop_back();

}

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

void ofApp::draw() {

for (int i = 0; i < this->number_of_agent; i++) {

ofSetColor(this->colors[i]);

for (int l = 0; l < this->logs[i].size() - 1; l++) {

ofDrawLine(this->logs[i][l], this->logs[i][l + 1]);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200811

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