プログラミング de 落描き – クリエイティブ・コーディングによる生成物とソース

2021年9月23日2021年9月24日

Random hexagon walker with shadow. Draw by openFrameworks

[ Video ]

[ About ]
OpenCVのぼかしで影を作って浮いている感じにする。

Use OpenCV’s blur to create shadows to make it look like it’s floating.

[ Source ]

#pragma once
#include "ofMain.h"
#include "opencv2/opencv.hpp"

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) {};

	float radius;
	vector<vector<glm::vec2>> hexagon_list;
	vector<ofColor> base_color_list;

	ofFbo fbo;
	ofPixels pixels;
	cv::Mat pixels_mat;
};

#pragma once

#include "ofMain.h"

#include "opencv2/opencv.hpp"

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) {};

float radius;

vector<vector<glm::vec2>> hexagon_list;

vector<ofColor> base_color_list;

ofFbo fbo;

ofPixels pixels;

cv::Mat pixels_mat;

};

#include "ofApp.h"

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

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

	ofBackground(239);

	this->radius = 15;
	vector<glm::vec2> start_location_list;
	auto x_span = this->radius * sqrt(3);
	auto flg = true;
	auto edge = 120;
	for (float y = edge; y < ofGetHeight() + this->radius - edge; y += this->radius * 1.5) {

		for (float x = edge; x < ofGetWidth() + this->radius - edge; x += x_span) {

			glm::vec2 location;
			if (flg) {

				location = glm::vec2(x, y);
			}
			else {

				location = glm::vec2(x + (this->radius * sqrt(3) / 2), y);
			}

			start_location_list.push_back(location);
		}
		flg = !flg;
	}

	for (int i = 0; i < 10; i++) {

		int r = ofRandom(start_location_list.size());

		auto log_list = vector<glm::vec2>();
		log_list.push_back(start_location_list[r]);
		this->hexagon_list.push_back(log_list);
	}

	ofColor color;
	vector<int> hex_list = { 0xee6352, 0x59cd90, 0x3fa7d6, 0xfac05e, 0xf79d84 };
	for (auto hex : hex_list) {

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

	this->fbo.allocate(ofGetWidth() + 25, ofGetHeight() + 25);
	this->fbo.readToPixels(this->pixels);
	this->pixels_mat = cv::Mat(this->pixels.getHeight(), this->pixels.getWidth(), CV_8UC4, this->pixels.getData());
}

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

	auto span = this->radius * sqrt(3);
	auto edge = 120;
	for (auto& log_list : this->hexagon_list) {

		int r = ofRandom(6);
		int deg_start = r * 60;
		for (int deg = deg_start; deg < deg_start + 360; deg += 60) {

			auto tmp_location = log_list.back() + glm::vec2(span * cos(deg * DEG_TO_RAD), span * sin(deg * DEG_TO_RAD));
			if (tmp_location.x < edge || tmp_location.x > ofGetWidth() + this->radius - edge || tmp_location.y < edge || tmp_location.y > ofGetHeight() + this->radius - edge) {

				continue;
			}

			log_list.push_back(tmp_location);
			break;
		}

		while (log_list.size() > 10) {

			log_list.erase(log_list.begin());
		}
	}

	this->fbo.begin();
	ofClear(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

	int color_index = 0;
	for (auto& log_list : this->hexagon_list) {

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

			vector<glm::vec2> vertices;
			for (auto deg = 90; deg < 450; deg += 60) {

				vertices.push_back(log_list[i] + glm::vec2(this->radius * cos(deg * DEG_TO_RAD), this->radius * sin(deg * DEG_TO_RAD)));
			}

			ofFill();
			ofSetColor(this->base_color_list[color_index % this->base_color_list.size()]);
			ofBeginShape();
			ofVertices(vertices);
			ofEndShape(true);

			ofNoFill();
			ofSetColor(255);
			ofBeginShape();
			ofVertices(vertices);
			ofEndShape(true);
		}

		color_index++;
	}

	ofDisableBlendMode();

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

	cv::Mat gray_mat, bit_mat;
	cv::cvtColor(this->pixels_mat, gray_mat, cv::COLOR_RGB2GRAY);
	for (int y = 0; y < this->pixels_mat.cols; y++) {

		for (int x = 0; x < this->pixels_mat.rows; x++) {

			if (gray_mat.at<unsigned char>(y, x) > 0) {

				this->pixels_mat.at<cv::Vec4b>(y, x) = cv::Vec4b(139, 139, 139, 255);
			}
		}
	}

	cv::GaussianBlur(this->pixels_mat, this->pixels_mat, cv::Size(19, 19), 10, 10);
}

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

	ofSetColor(255);

	ofImage draw_image;
	draw_image.setFromPixels(this->pixels);
	draw_image.draw(0, 0);

	this->fbo.draw(-15, -15);
}

//--------------------------------------------------------------
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);

this->radius = 15;

vector<glm::vec2> start_location_list;

auto x_span = this->radius * sqrt(3);

auto flg = true;

auto edge = 120;

for (float y = edge; y < ofGetHeight() + this->radius - edge; y += this->radius * 1.5) {

for (float x = edge; x < ofGetWidth() + this->radius - edge; x += x_span) {

glm::vec2 location;

if (flg) {

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

}

else {

location = glm::vec2(x + (this->radius * sqrt(3) / 2), y);

}

start_location_list.push_back(location);

}

flg = !flg;

}

for (int i = 0; i < 10; i++) {

int r = ofRandom(start_location_list.size());

auto log_list = vector<glm::vec2>();

log_list.push_back(start_location_list[r]);

this->hexagon_list.push_back(log_list);

}

ofColor color;

vector<int> hex_list = { 0xee6352, 0x59cd90, 0x3fa7d6, 0xfac05e, 0xf79d84 };

for (auto hex : hex_list) {

color.setHex(hex);

this->base_color_list.push_back(color);

}

this->fbo.allocate(ofGetWidth() + 25, ofGetHeight() + 25);

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

this->pixels_mat = cv::Mat(this->pixels.getHeight(), this->pixels.getWidth(), CV_8UC4, this->pixels.getData());

}

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

void ofApp::update() {

auto span = this->radius * sqrt(3);

auto edge = 120;

for (auto& log_list : this->hexagon_list) {

int r = ofRandom(6);

int deg_start = r * 60;

for (int deg = deg_start; deg < deg_start + 360; deg += 60) {

auto tmp_location = log_list.back() + glm::vec2(span * cos(deg * DEG_TO_RAD), span * sin(deg * DEG_TO_RAD));

if (tmp_location.x < edge || tmp_location.x > ofGetWidth() + this->radius - edge || tmp_location.y < edge || tmp_location.y > ofGetHeight() + this->radius - edge) {

continue;

}

log_list.push_back(tmp_location);

break;

}

while (log_list.size() > 10) {

log_list.erase(log_list.begin());

}

this->fbo.begin();

ofClear(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

int color_index = 0;

for (auto& log_list : this->hexagon_list) {

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

vector<glm::vec2> vertices;

for (auto deg = 90; deg < 450; deg += 60) {

vertices.push_back(log_list[i] + glm::vec2(this->radius * cos(deg * DEG_TO_RAD), this->radius * sin(deg * DEG_TO_RAD)));

}

ofFill();

ofSetColor(this->base_color_list[color_index % this->base_color_list.size()]);

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

ofNoFill();

ofSetColor(255);

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

}

color_index++;

}

ofDisableBlendMode();

this->fbo.end();

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

cv::Mat gray_mat, bit_mat;

cv::cvtColor(this->pixels_mat, gray_mat, cv::COLOR_RGB2GRAY);

for (int y = 0; y < this->pixels_mat.cols; y++) {

for (int x = 0; x < this->pixels_mat.rows; x++) {

if (gray_mat.at<unsigned char>(y, x) > 0) {

this->pixels_mat.at<cv::Vec4b>(y, x) = cv::Vec4b(139, 139, 139, 255);

}

cv::GaussianBlur(this->pixels_mat, this->pixels_mat, cv::Size(19, 19), 10, 10);

}

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

void ofApp::draw() {

ofSetColor(255);

ofImage draw_image;

draw_image.setFromPixels(this->pixels);

draw_image.draw(0, 0);

this->fbo.draw(-15, -15);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210923

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2021年9月22日

Neon circles. Draw by openFrameworks

[ Video ]

[ About ]
OpenCVで描画をぼかしてネオン風にする。

Blurring a draw with OpenCV to make it look neon.

[ Source ]

#pragma once
#include "ofMain.h"
#include "opencv2/opencv.hpp"

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) {};

	ofFbo fbo;
	ofPixels pixels;
	cv::Mat pixels_mat;
};

#pragma once

#include "ofMain.h"

#include "opencv2/opencv.hpp"

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) {};

ofFbo fbo;

ofPixels pixels;

cv::Mat pixels_mat;

};

#include "ofApp.h"

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

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

	ofBackground(0);
	ofSetLineWidth(3);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	this->fbo.readToPixels(this->pixels);
	this->pixels_mat = cv::Mat(this->pixels.getHeight(), this->pixels.getWidth(), CV_8UC4, this->pixels.getData());
}

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

	ofSeedRandom(914);

	this->fbo.begin();
	ofClear(0);
	ofFill();
	ofTranslate(this->fbo.getWidth() * 0.5, this->fbo.getHeight() * 0.5);

	ofColor color;
	for (int i = 0; i < 14; i++) {

		auto len = 23;
		auto radius = (i + 1) * 20;
		auto deg_start = 0;
		auto deg_param = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, 90, 360 + 120);
		if (deg_param > 360) { deg_param = 360; }
		auto deg_end = deg_start + deg_param;
		vector<glm::vec2> vertices_1, vertices_2;
		for (int deg = deg_start - 5; deg <= deg_end + 5; deg++) {

			vertices_1.push_back(glm::vec2((radius - len * 0.5) * cos(deg * DEG_TO_RAD), (radius - len * 0.5) * sin(deg * DEG_TO_RAD)));
			vertices_2.push_back(glm::vec2((radius + len * 0.5) * cos(deg * DEG_TO_RAD), (radius + len * 0.5) * sin(deg * DEG_TO_RAD)));
		}
		reverse(vertices_2.begin(), vertices_2.end());

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

		ofBeginShape();
		ofVertices(vertices_1);
		ofVertices(vertices_2);
		ofEndShape(true);
	}

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

	cv::GaussianBlur(this->pixels_mat, this->pixels_mat, cv::Size(49, 49), 50, 50);
}

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

	ofSeedRandom(914);

	ofFill();
	ofSetColor(255);
	ofImage draw_image;
	draw_image.setFromPixels(this->pixels);
	draw_image.draw(0, 0);

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

	ofColor color;
	for (int i = 0; i < 14; i++) {

		auto len = 8;
		auto radius = (i + 1) * 20;
		auto deg_start = 0;
		auto deg_param = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, 90, 360 + 120);
		if (deg_param > 360) { deg_param = 360; }
		auto deg_end = deg_start + deg_param;
		vector<glm::vec2> vertices_1, vertices_2;
		for (int deg = deg_start; deg <= deg_end; deg++) {

			vertices_1.push_back(glm::vec2((radius - len * 0.5) * cos(deg * DEG_TO_RAD), (radius - len * 0.5) * sin(deg * DEG_TO_RAD)));
			vertices_2.push_back(glm::vec2((radius + len * 0.5) * cos(deg * DEG_TO_RAD), (radius + len * 0.5) * sin(deg * DEG_TO_RAD)));
		}
		reverse(vertices_2.begin(), vertices_2.end());

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

		ofFill();
		ofSetColor(ofColor(255));
		ofBeginShape();
		ofVertices(vertices_1);
		ofVertices(vertices_2);
		ofEndShape(true);

		ofNoFill();
		ofSetColor(color);
		ofBeginShape();
		ofVertices(vertices_1);
		ofVertices(vertices_2);
		ofEndShape(true);
	}
}

//--------------------------------------------------------------
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(3);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

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

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

this->pixels_mat = cv::Mat(this->pixels.getHeight(), this->pixels.getWidth(), CV_8UC4, this->pixels.getData());

}

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

void ofApp::update() {

ofSeedRandom(914);

this->fbo.begin();

ofClear(0);

ofFill();

ofTranslate(this->fbo.getWidth() * 0.5, this->fbo.getHeight() * 0.5);

ofColor color;

for (int i = 0; i < 14; i++) {

auto len = 23;

auto radius = (i + 1) * 20;

auto deg_start = 0;

auto deg_param = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, 90, 360 + 120);

if (deg_param > 360) { deg_param = 360; }

auto deg_end = deg_start + deg_param;

vector<glm::vec2> vertices_1, vertices_2;

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

vertices_1.push_back(glm::vec2((radius - len * 0.5) * cos(deg * DEG_TO_RAD), (radius - len * 0.5) * sin(deg * DEG_TO_RAD)));

vertices_2.push_back(glm::vec2((radius + len * 0.5) * cos(deg * DEG_TO_RAD), (radius + len * 0.5) * sin(deg * DEG_TO_RAD)));

}

reverse(vertices_2.begin(), vertices_2.end());

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

ofSetColor(color);

ofBeginShape();

ofVertices(vertices_1);

ofVertices(vertices_2);

ofEndShape(true);

}

this->fbo.end();

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

cv::GaussianBlur(this->pixels_mat, this->pixels_mat, cv::Size(49, 49), 50, 50);

}

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

void ofApp::draw() {

ofSeedRandom(914);

ofFill();

ofSetColor(255);

ofImage draw_image;

draw_image.setFromPixels(this->pixels);

draw_image.draw(0, 0);

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

ofColor color;

for (int i = 0; i < 14; i++) {

auto len = 8;

auto radius = (i + 1) * 20;

auto deg_start = 0;

auto deg_param = ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.008), 0, 1, 90, 360 + 120);

if (deg_param > 360) { deg_param = 360; }

auto deg_end = deg_start + deg_param;

vector<glm::vec2> vertices_1, vertices_2;

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

vertices_1.push_back(glm::vec2((radius - len * 0.5) * cos(deg * DEG_TO_RAD), (radius - len * 0.5) * sin(deg * DEG_TO_RAD)));

vertices_2.push_back(glm::vec2((radius + len * 0.5) * cos(deg * DEG_TO_RAD), (radius + len * 0.5) * sin(deg * DEG_TO_RAD)));

}

reverse(vertices_2.begin(), vertices_2.end());

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

ofFill();

ofSetColor(ofColor(255));

ofBeginShape();

ofVertices(vertices_1);

ofVertices(vertices_2);

ofEndShape(true);

ofNoFill();

ofSetColor(color);

ofBeginShape();

ofVertices(vertices_1);

ofVertices(vertices_2);

ofEndShape(true);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20210922

[ほしいものリスト]
Amazon

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2021年9月21日

Random orb. Draw by openFrameworks

[ Video ]

[ About ]
ランダムウォークの座標をshaderに送って光らせる。

Send the coordinates of the random walk to the shader to make it glow.

[ 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) {};

	vector<glm::vec3> base_color_list;

	int number_of_targets;
	vector<glm::vec2> target_list;
	vector<glm::vec3> target_color_list;

	int frame_span;
	float size;
	vector<glm::vec2> location_list;

	vector<int> current_index_list;
	vector<int> next_index_list;
	vector<glm::vec3> color_list;

	ofShader shader;
};

#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) {};

vector<glm::vec3> base_color_list;

int number_of_targets;

vector<glm::vec2> target_list;

vector<glm::vec3> target_color_list;

int frame_span;

float size;

vector<glm::vec2> location_list;

vector<int> current_index_list;

vector<int> next_index_list;

vector<glm::vec3> color_list;

ofShader shader;

};

#include "ofApp.h"	

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

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

	ofBackground(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
	ofSetCircleResolution(72);

	this->base_color_list.push_back(glm::vec3(0.4, 0.25, 0.25));
	this->base_color_list.push_back(glm::vec3(0.25, 0.4, 0.25));
	this->base_color_list.push_back(glm::vec3(0.25, 0.25, 0.4));

	this->frame_span = 60;
	this->size = 15;
	this->number_of_targets = 120;

	for (int x = this->size * 6; x <= ofGetWidth() - this->size * 6; x += this->size * 3) {

		for (int y = this->size * 6; y <= ofGetHeight() - this->size * 6; y += this->size * 3) {

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

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

		this->target_list.push_back(glm::vec2());
		this->target_color_list.push_back(glm::vec3(1, 1, 1));

		this->current_index_list.push_back(0);
		this->next_index_list.push_back(ofRandom(this->location_list.size()));
		this->color_list.push_back(this->base_color_list[ofRandom(this->base_color_list.size())]);
	}

	this->shader.load("shader/shader.vert", "shader/shader.frag");
}

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

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

		if (ofGetFrameNum() % (this->frame_span * 2) == 0) {

			int next_index = this->next_index_list[i];
			int current_index = next_index;

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

				if (current_index == location_index) { continue; }
				if (glm::distance(this->location_list[current_index], this->location_list[location_index]) < this->size * 5) {

					near_indexes.push_back(location_index);
				}
			}

			if (near_indexes.size() > 0) {

				next_index = near_indexes[ofRandom(near_indexes.size())];
			}

			this->current_index_list[i] = current_index;
			this->next_index_list[i] = next_index;
		}
	}

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

		if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

			this->target_list[i] = this->location_list[this->current_index_list[i]];
			this->target_color_list[i] = this->color_list[i];
		}
		else {

			this->target_list[i] = this->location_list[this->next_index_list[i]];
			this->target_color_list[i] = this->color_list[i];
		}
	}
}

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

	int frame_param = ofGetFrameNum() % this->frame_span;

	ofSetLineWidth(5);
	for (int i = 0; i < this->next_index_list.size(); i++) {

		ofSetColor(ofMap(this->target_color_list[i].x, 0.25, 0.4, 0, 255), ofMap(this->target_color_list[i].y, 0.25, 0.4, 0, 255), ofMap(this->target_color_list[i].z, 0.25, 0.4, 0, 255));

		int current_index = this->current_index_list[i];
		int next_index = this->next_index_list[i];

		auto angle_current = std::atan2(this->location_list[next_index].y - this->location_list[current_index].y, this->location_list[next_index].x - this->location_list[current_index].x);
		auto satellite_point_current = this->location_list[current_index] + glm::vec2(this->size * cos(angle_current), this->size * sin(angle_current));
		auto angle_next = std::atan2(this->location_list[current_index].y - this->location_list[next_index].y, this->location_list[current_index].x - this->location_list[next_index].x);
		auto satellite_point_next = this->location_list[next_index] + glm::vec2(this->size * cos(angle_next), this->size * sin(angle_next));

		if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

			auto distance = glm::distance(satellite_point_next, satellite_point_current);
			distance = ofMap(frame_param, 0, this->frame_span, 0, distance);
			auto direction = satellite_point_next - satellite_point_current;
			ofDrawLine(satellite_point_current, satellite_point_current + glm::normalize(direction) * distance);
		}
		else {

			auto distance = glm::distance(satellite_point_next, satellite_point_current);
			distance = ofMap(frame_param, 0, this->frame_span, distance, 0);
			auto direction = satellite_point_next - satellite_point_current;
			ofDrawLine(satellite_point_next, satellite_point_next - glm::normalize(direction) * distance);
		}
	}

	ofSetLineWidth(0.1);
	ofSetColor(255);
	ofNoFill();
	for (int location_index = 0; location_index < this->location_list.size(); location_index++) {

		ofDrawCircle(this->location_list[location_index], this->size);
	}

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

		if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

			float p = ofGetFrameNum() % this->frame_span < this->frame_span * 0.5 ? 1 : ofMap(ofGetFrameNum() % this->frame_span, this->frame_span * 0.5, this->frame_span, 1, 0);
			this->target_color_list[i] = this->target_color_list[i] * p;
		}
		else {

			this->target_color_list[i] = this->target_color_list[i] * ofMap(ofGetFrameNum() % this->frame_span, 0, this->frame_span, 0, 1);
		}
	}

	ofFill();
	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniform2fv("targets", &this->target_list[0].x, this->number_of_targets);
	this->shader.setUniform3fv("colors", &this->target_color_list[0].x, this->number_of_targets);

	ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight());

	this->shader.end();
}

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

	ofGLWindowSettings settings;
	settings.setGLVersion(3, 2);
	settings.setSize(720, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

ofSetCircleResolution(72);

this->base_color_list.push_back(glm::vec3(0.4, 0.25, 0.25));

this->base_color_list.push_back(glm::vec3(0.25, 0.4, 0.25));

this->base_color_list.push_back(glm::vec3(0.25, 0.25, 0.4));

this->frame_span = 60;

this->size = 15;

this->number_of_targets = 120;

for (int x = this->size * 6; x <= ofGetWidth() - this->size * 6; x += this->size * 3) {

for (int y = this->size * 6; y <= ofGetHeight() - this->size * 6; y += this->size * 3) {

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

}

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

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

this->target_color_list.push_back(glm::vec3(1, 1, 1));

this->current_index_list.push_back(0);

this->next_index_list.push_back(ofRandom(this->location_list.size()));

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

}

this->shader.load("shader/shader.vert", "shader/shader.frag");

}

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

void ofApp::update() {

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

if (ofGetFrameNum() % (this->frame_span * 2) == 0) {

int next_index = this->next_index_list[i];

int current_index = next_index;

vector<int> near_indexes;

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

if (current_index == location_index) { continue; }

if (glm::distance(this->location_list[current_index], this->location_list[location_index]) < this->size * 5) {

near_indexes.push_back(location_index);

}

if (near_indexes.size() > 0) {

next_index = near_indexes[ofRandom(near_indexes.size())];

}

this->current_index_list[i] = current_index;

this->next_index_list[i] = next_index;

}

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

if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

this->target_list[i] = this->location_list[this->current_index_list[i]];

this->target_color_list[i] = this->color_list[i];

}

else {

this->target_list[i] = this->location_list[this->next_index_list[i]];

this->target_color_list[i] = this->color_list[i];

}

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

void ofApp::draw() {

int frame_param = ofGetFrameNum() % this->frame_span;

ofSetLineWidth(5);

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

ofSetColor(ofMap(this->target_color_list[i].x, 0.25, 0.4, 0, 255), ofMap(this->target_color_list[i].y, 0.25, 0.4, 0, 255), ofMap(this->target_color_list[i].z, 0.25, 0.4, 0, 255));

int current_index = this->current_index_list[i];

int next_index = this->next_index_list[i];

auto angle_current = std::atan2(this->location_list[next_index].y - this->location_list[current_index].y, this->location_list[next_index].x - this->location_list[current_index].x);

auto satellite_point_current = this->location_list[current_index] + glm::vec2(this->size * cos(angle_current), this->size * sin(angle_current));

auto angle_next = std::atan2(this->location_list[current_index].y - this->location_list[next_index].y, this->location_list[current_index].x - this->location_list[next_index].x);

auto satellite_point_next = this->location_list[next_index] + glm::vec2(this->size * cos(angle_next), this->size * sin(angle_next));

if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

auto distance = glm::distance(satellite_point_next, satellite_point_current);

distance = ofMap(frame_param, 0, this->frame_span, 0, distance);

auto direction = satellite_point_next - satellite_point_current;

ofDrawLine(satellite_point_current, satellite_point_current + glm::normalize(direction) * distance);

}

else {

auto distance = glm::distance(satellite_point_next, satellite_point_current);

distance = ofMap(frame_param, 0, this->frame_span, distance, 0);

auto direction = satellite_point_next - satellite_point_current;

ofDrawLine(satellite_point_next, satellite_point_next - glm::normalize(direction) * distance);

}

ofSetLineWidth(0.1);

ofSetColor(255);

ofNoFill();

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

ofDrawCircle(this->location_list[location_index], this->size);

}

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

if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

float p = ofGetFrameNum() % this->frame_span < this->frame_span * 0.5 ? 1 : ofMap(ofGetFrameNum() % this->frame_span, this->frame_span * 0.5, this->frame_span, 1, 0);

this->target_color_list[i] = this->target_color_list[i] * p;

}

else {

this->target_color_list[i] = this->target_color_list[i] * ofMap(ofGetFrameNum() % this->frame_span, 0, this->frame_span, 0, 1);

}

ofFill();

this->shader.begin();

this->shader.setUniform1f("time", ofGetElapsedTimef());

this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());

this->shader.setUniform2fv("targets", &this->target_list[0].x, this->number_of_targets);

this->shader.setUniform3fv("colors", &this->target_color_list[0].x, this->number_of_targets);

ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight());

this->shader.end();

}

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

int main() {

ofGLWindowSettings settings;

settings.setGLVersion(3, 2);

settings.setSize(720, 720);

ofCreateWindow(settings);

ofRunApp(new ofApp());

}

#version 150

uniform mat4 modelViewProjectionMatrix;
in vec4 position;

void main(){
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

void main(){

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

const int number_of_targets = 120;

uniform float time;
uniform vec2 resolution;
uniform vec2 targets[number_of_targets];
uniform vec3 colors[number_of_targets];

out vec4 outputColor;

void main() {

  vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);
  vec3 color = vec3(0.0);
  for(int i = 0; i < number_of_targets; i++){

    vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;
    t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

    float v = 0.035 / length(p - t);
	float r = v * colors[i].x;
	float g = v * colors[i].y;
	float b = v * colors[i].z;
    vec3 c = vec3(smoothstep(0.05, 1.0, r), smoothstep(0.05, 1.0, g), smoothstep(0.05, 1.0, b));
    color += c;
  }

  outputColor = vec4(color, 1.0);
}

#version 150

const int number_of_targets = 120;

uniform float time;

uniform vec2 resolution;

uniform vec2 targets[number_of_targets];

uniform vec3 colors[number_of_targets];

out vec4 outputColor;

void main() {

vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

vec3 color = vec3(0.0);

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

vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;

t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

float v = 0.035 / length(p - t);

float r = v * colors[i].x;

float g = v * colors[i].y;

float b = v * colors[i].z;

vec3 c = vec3(smoothstep(0.05, 1.0, r), smoothstep(0.05, 1.0, g), smoothstep(0.05, 1.0, b));

color += c;

}

outputColor = vec4(color, 1.0);

}

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https://github.com/junkiyoshi/Insta20210921

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