font – ページ 59 – プログラミング de 落描き

2018年11月2日2018年11月19日

Time. openFrameworks

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Day2 Time.

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#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) {};

	ofTrueTypeFont font;
	int font_size;
};

#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) {};

ofTrueTypeFont font;

int font_size;

};

#include "ofApp.h"

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

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

	ofNoFill();
	ofBackground(39);
	ofSetColor(239);
	ofSetLineWidth(3);

	this->font_size = 300;
	this->font.loadFont("fonts/Kazesawa-Regular.ttf", this->font_size, true, true, true);
}

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

}

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

	SYSTEMTIME sys_time;
	GetSystemTime(&sys_time);

	int second = sys_time.wSecond;
	int sample_count = 100;
	int step = ofMap(sys_time.wMilliseconds, 0, 1000, 0, sample_count * 2);
	bool close = false;
	
	std::ostringstream sout;
	sout << setfill('0') << setw(2) << second;
	string word = sout.str();
	char charactors[2];
	word.copy(charactors, 2);

	ofTranslate(this->font_size * 0.35, ofGetHeight() * 0.5 + this->font_size * 0.5);

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

		ofPath path = this->font.getCharacterAsPoints(charactors[charactor_index], true, false);
		vector<ofPolyline> outline = path.getOutline();

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

			outline[outline_index] = outline[outline_index].getResampledByCount(sample_count);
			vector<glm::vec3> vertices = outline[outline_index].getVertices();

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

				ofPoint point(vertices[vertices_index].x, vertices[vertices_index].y, vertices[vertices_index].z);

				close = false;
				if(charactor_index == 0)
				{
					if (second % 10 != 0) {

						ofVertex(point);
						close = true;
					}
					else {

						if (step < sample_count) {

							if (vertices_index < step % sample_count) {

								ofVertex(point);
							}

							if (vertices_index == step % sample_count) {

								ofDrawCircle(point, 3);
							}
						}
						else {

							ofVertex(point);
							close = true;
						}
					}
				}
				else {

					if (step < sample_count) {

						if (vertices_index < step % sample_count) {

							ofVertex(point);
						}
					}
					else {

						if (vertices_index > step % sample_count) {

							ofVertex(point);
						}
					}

					if (vertices_index == step % sample_count) {

						ofDrawCircle(point, 3);
					}
				}
			}
			ofEndShape(close);
		}

		ofTranslate(this->font_size, 0);
	}
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofNoFill();

ofBackground(39);

ofSetColor(239);

ofSetLineWidth(3);

this->font_size = 300;

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

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

SYSTEMTIME sys_time;

GetSystemTime(&sys_time);

int second = sys_time.wSecond;

int sample_count = 100;

int step = ofMap(sys_time.wMilliseconds, 0, 1000, 0, sample_count * 2);

bool close = false;

std::ostringstream sout;

sout << setfill('0') << setw(2) << second;

string word = sout.str();

char charactors[2];

word.copy(charactors, 2);

ofTranslate(this->font_size * 0.35, ofGetHeight() * 0.5 + this->font_size * 0.5);

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

ofPath path = this->font.getCharacterAsPoints(charactors[charactor_index], true, false);

vector<ofPolyline> outline = path.getOutline();

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

outline[outline_index] = outline[outline_index].getResampledByCount(sample_count);

vector<glm::vec3> vertices = outline[outline_index].getVertices();

ofBeginShape();

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

ofPoint point(vertices[vertices_index].x, vertices[vertices_index].y, vertices[vertices_index].z);

close = false;

if(charactor_index == 0)

{

if (second % 10 != 0) {

ofVertex(point);

close = true;

}

else {

if (step < sample_count) {

if (vertices_index < step % sample_count) {

ofVertex(point);

}

if (vertices_index == step % sample_count) {

ofDrawCircle(point, 3);

}

else {

ofVertex(point);

close = true;

}

else {

if (step < sample_count) {

if (vertices_index < step % sample_count) {

ofVertex(point);

}

else {

if (vertices_index > step % sample_count) {

ofVertex(point);

}

if (vertices_index == step % sample_count) {

ofDrawCircle(point, 3);

}

ofEndShape(close);

}

ofTranslate(this->font_size, 0);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

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2018年10月31日2018年10月31日

Halloween 2018. openFrameworks

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[ About ]
トリック・オア・トリート🎃🍭👻！

Trick or Treat🎃🍭👻.

[ 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) {};

	ofTrueTypeFont font;
	vector<ofPoint> locations;
	vector<ofColor> colors;
};

#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) {};

ofTrueTypeFont font;

vector<ofPoint> locations;

vector<ofColor> colors;

};

#include "ofApp.h"

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

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

	ofBackground(39);

	int font_size = 170;
	this->font.loadFont("fonts/Kazesawa-Bold.ttf", font_size, true, true, true);

	ofFbo fbo;
	fbo.allocate(ofGetWidth(), ofGetHeight());
	fbo.begin();
	ofClear(0);

	string word = "TRICK";
	font.drawString(word, 0, font_size + 50);

	word = "OR";
	font.drawString(word, ofGetWidth() * 0.5 - font.stringWidth(word) * 0.5, ofGetHeight() * 0.5 + font_size * 0.5);

	word = "TREAT";
	font.drawString(word, ofGetWidth() - font.stringWidth(word), ofGetHeight() - 55);

	fbo.end();

	ofPixels pixels;
	fbo.readToPixels(pixels);

	font_size = 20;
	for (int x = 0; x < fbo.getWidth(); x += font_size) {

		for (int y = 0; y < fbo.getHeight(); y += font_size) {

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

				this->locations.push_back(ofPoint(x, y));

				ofColor color;
				color.setHsb(ofRandom(255), 255, 255);
				
				this->colors.push_back(color);
			}
		}
	}

	ofTrueTypeFontSettings font_settings("fonts/EmojiSymbols-Regular.ttf", font_size);
	font_settings.antialiased = true;
	font_settings.addRanges(ofAlphabet::Emoji);
	this->font.load(font_settings);	
}

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

}

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

	vector<string> words = {
		u8"🎃", u8"🍭", u8"👻",
	};

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

		ofPoint point = this->locations[i];
		int words_index = ofNoise(point.x * 0.003, point.y * 0.003, ofGetFrameNum() * 0.005) * words.size();
		std::string moji = words[words_index];

		if (words_index == 0) {

			ofSetColor(229, 163, 35);
		}
		else if(words_index == 1) {

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

			ofSetColor(239);
		}

		this->font.drawString(moji, point.x, point.y);
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(39);

int font_size = 170;

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

ofFbo fbo;

fbo.allocate(ofGetWidth(), ofGetHeight());

fbo.begin();

ofClear(0);

string word = "TRICK";

font.drawString(word, 0, font_size + 50);

word = "OR";

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

word = "TREAT";

font.drawString(word, ofGetWidth() - font.stringWidth(word), ofGetHeight() - 55);

fbo.end();

ofPixels pixels;

fbo.readToPixels(pixels);

font_size = 20;

for (int x = 0; x < fbo.getWidth(); x += font_size) {

for (int y = 0; y < fbo.getHeight(); y += font_size) {

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

this->locations.push_back(ofPoint(x, y));

ofColor color;

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

this->colors.push_back(color);

}

ofTrueTypeFontSettings font_settings("fonts/EmojiSymbols-Regular.ttf", font_size);

font_settings.antialiased = true;

font_settings.addRanges(ofAlphabet::Emoji);

this->font.load(font_settings);

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

vector<string> words = {

u8"🎃", u8"🍭", u8"👻",

};

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

ofPoint point = this->locations[i];

int words_index = ofNoise(point.x * 0.003, point.y * 0.003, ofGetFrameNum() * 0.005) * words.size();

std::string moji = words[words_index];

if (words_index == 0) {

ofSetColor(229, 163, 35);

}

else if(words_index == 1) {

ofSetColor(this->colors[i]);

}

else {

ofSetColor(239);

}

this->font.drawString(moji, point.x, point.y);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

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2018年10月25日2018年10月25日

GRID. openframeworks

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GRID.

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#pragma once
#include "ofMain.h"
#include "Particle.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) {};

	ofShader shader;
	int number_of_targets;

	ofFbo src;
	ofFbo dst;

	vector<Particle> particles;
	vector<ofPoint> locations;
	vector<vector<int>> next_indexes;
};

#pragma once

#include "ofMain.h"

#include "Particle.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) {};

ofShader shader;

int number_of_targets;

ofFbo src;

ofFbo dst;

vector<Particle> particles;

vector<ofPoint> locations;

vector<vector<int>> next_indexes;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openframeworks");
	
	ofBackground(0);
	ofSetColor(255);

	ofTrueTypeFont font;
	int font_size = 230;
	font.loadFont("fonts/Kazesawa-Bold.ttf", font_size, true, true, true);

	ofFbo fbo;
	fbo.allocate(ofGetWidth(), ofGetHeight());
	fbo.begin();
	ofClear(0);
	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);

	string word = "GRID";
	font.drawString(word, font.stringWidth(word) * -0.5, font.stringHeight(word) * 0.5);
	
	fbo.end();

	ofPixels pixels;
	fbo.readToPixels(pixels);

	int span = 10;
	for (int x = 0; x < fbo.getWidth(); x += span) {

		for (int y = 0; y < fbo.getHeight(); y += span) {

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

				this->locations.push_back(ofPoint(x, fbo.getHeight() - y));
			}
		}
	}

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

		vector<int> next_index = vector<int>();
		for (int j = 0; j < this->locations.size(); j++) {

			if (i == j) { continue; }

			float distance = this->locations[i].distance(this->locations[j]);
			if (distance <= span) {

				next_index.push_back(j);
			}
		}

		this->next_indexes.push_back(next_index);
	}

	this->number_of_targets = 200;
	for (int i = 0; i < this->number_of_targets; i++) {

		this->particles.push_back(Particle(this->locations, this->next_indexes));
	}

	this->src.allocate(ofGetWidth(), ofGetHeight());
	this->dst.allocate(ofGetWidth(), ofGetHeight());
	this->shader.load("shader/shader.vert", "shader/shader.frag");
}
//--------------------------------------------------------------
void ofApp::update() {

	for (Particle& particle : this->particles) { particle.Upate(); }
}

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

	vector<glm::vec2> targets;
	for (int i = 0; i < this->number_of_targets; i++) { targets.push_back(glm::vec2(this->particles[i].location.x, this->particles[i].location.y)); }

	this->dst.begin();
	this->shader.begin();

	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniform2fv("targets", &targets[0].x, this->number_of_targets);
	this->shader.setUniformTexture("fbo", this->src.getTexture(), 1);
	this->src.draw(0, 0);

	this->shader.end();
	this->dst.end();

	this->dst.draw(0, 0);
	std::swap(this->src, this->dst);
}

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

ofSetColor(255);

ofTrueTypeFont font;

int font_size = 230;

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

ofFbo fbo;

fbo.allocate(ofGetWidth(), ofGetHeight());

fbo.begin();

ofClear(0);

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

string word = "GRID";

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

fbo.end();

ofPixels pixels;

fbo.readToPixels(pixels);

int span = 10;

for (int x = 0; x < fbo.getWidth(); x += span) {

for (int y = 0; y < fbo.getHeight(); y += span) {

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

this->locations.push_back(ofPoint(x, fbo.getHeight() - y));

}

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

vector<int> next_index = vector<int>();

for (int j = 0; j < this->locations.size(); j++) {

if (i == j) { continue; }

float distance = this->locations[i].distance(this->locations[j]);

if (distance <= span) {

next_index.push_back(j);

}

this->next_indexes.push_back(next_index);

}

this->number_of_targets = 200;

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

this->particles.push_back(Particle(this->locations, this->next_indexes));

}

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

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

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

}

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

void ofApp::update() {

for (Particle& particle : this->particles) { particle.Upate(); }

}

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

void ofApp::draw() {

vector<glm::vec2> targets;

for (int i = 0; i < this->number_of_targets; i++) { targets.push_back(glm::vec2(this->particles[i].location.x, this->particles[i].location.y)); }

this->dst.begin();

this->shader.begin();

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

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

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

this->shader.setUniformTexture("fbo", this->src.getTexture(), 1);

this->src.draw(0, 0);

this->shader.end();

this->dst.end();

this->dst.draw(0, 0);

std::swap(this->src, this->dst);

}

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

int main() {

ofGLWindowSettings settings;

settings.setGLVersion(3, 2);

settings.setSize(720, 720);

ofCreateWindow(settings);

ofRunApp(new ofApp());

}

#pragma once
#include "ofMain.h"

class Particle {
public:
	Particle(vector<ofPoint> locations, vector<vector<int>> next_indexes);
	~Particle();
	void Upate();
	void Draw();

	ofPoint location;
private:

	vector<ofPoint> locations;
	vector<vector<int>> next_indexes;

	int locations_index;
	int next_index;
};

#pragma once

#include "ofMain.h"

class Particle {

public:

Particle(vector<ofPoint> locations, vector<vector<int>> next_indexes);

~Particle();

void Upate();

void Draw();

ofPoint location;

private:

vector<ofPoint> locations;

vector<vector<int>> next_indexes;

int locations_index;

int next_index;

};

#include "Particle.h"

//--------------------------------------------------------------
Particle::Particle(vector<ofPoint> locations, vector<vector<int>> next_indexes) {

	this->locations = locations;
	this->next_indexes = next_indexes;

	while (true) {

		this->locations_index = (int)ofRandom(this->locations.size());
		if (this->next_indexes[this->locations_index].size() > 0) {

			this->next_index = this->next_indexes[this->locations_index][(int)ofRandom(this->next_indexes[this->locations_index].size())];
			break;
		}
	}

}

//--------------------------------------------------------------
Particle::~Particle() {

}

//--------------------------------------------------------------
void Particle::Upate() {

	int frame_span = 5;

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

		this->locations_index = this->next_index;
		this->next_index = this->next_indexes[this->locations_index][(int)ofRandom(this->next_indexes[this->locations_index].size())];
	}

	ofPoint distance = this->locations[this->next_index] - this->locations[this->locations_index];
	this->location = this->locations[this->locations_index] + distance / frame_span * (ofGetFrameNum() % frame_span);
}

//--------------------------------------------------------------
void Particle::Draw() {

}

#include "Particle.h"

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

Particle::Particle(vector<ofPoint> locations, vector<vector<int>> next_indexes) {

this->locations = locations;

this->next_indexes = next_indexes;

while (true) {

this->locations_index = (int)ofRandom(this->locations.size());

if (this->next_indexes[this->locations_index].size() > 0) {

this->next_index = this->next_indexes[this->locations_index][(int)ofRandom(this->next_indexes[this->locations_index].size())];

break;

}

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

Particle::~Particle() {

}

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

void Particle::Upate() {

int frame_span = 5;

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

this->locations_index = this->next_index;

this->next_index = this->next_indexes[this->locations_index][(int)ofRandom(this->next_indexes[this->locations_index].size())];

}

ofPoint distance = this->locations[this->next_index] - this->locations[this->locations_index];

this->location = this->locations[this->locations_index] + distance / frame_span * (ofGetFrameNum() % frame_span);

}

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

void Particle::Draw() {

}

#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 = 200;

out vec4 outputColor;
uniform float time;
uniform vec2 resolution;
uniform vec2 targets[number_of_targets];
uniform sampler2DRect fbo;

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 r = 0.01 / length(p - t) * 0.2;
    float g = 0.01 / length(p - t) * 0.2;
    float b = 0.01 / length(p - t) * 0.5;
    vec3 c = vec3(smoothstep(0.2, 1.0, r), smoothstep(0.2, 1.0, g), smoothstep(0.2, 1.0, b));
    color += c;
  }

  vec4 fbo_value = texture(fbo, vec2(gl_FragCoord.x, gl_FragCoord.y));
  outputColor = vec4(color, 1.0) + fbo_value * 0.9;
}

#version 150

const int number_of_targets = 200;

out vec4 outputColor;

uniform float time;

uniform vec2 resolution;

uniform vec2 targets[number_of_targets];

uniform sampler2DRect fbo;

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 r = 0.01 / length(p - t) * 0.2;

float g = 0.01 / length(p - t) * 0.2;

float b = 0.01 / length(p - t) * 0.5;

vec3 c = vec3(smoothstep(0.2, 1.0, r), smoothstep(0.2, 1.0, g), smoothstep(0.2, 1.0, b));

color += c;

}

vec4 fbo_value = texture(fbo, vec2(gl_FragCoord.x, gl_FragCoord.y));

outputColor = vec4(color, 1.0) + fbo_value * 0.9;

}

[ Link ]
https://github.com/junkiyoshi/Insta20181025

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