font – ページ 62 – プログラミング de 落描き

2018年9月5日2018年9月5日

RGB DRIFT. openFrameworks

[ Video ]

[ About ]
ofFboに絵を描写してテキスチャとしてシェーダに送信、シェーダでピクセルずらし処理

Draw picture on ofFbo and send it to shader, pixel shift processing with shader.

[ 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) {};

	ofFbo fbo;
	ofTrueTypeFont font;

	glm::vec3 x_noise;
	glm::vec3 y_noise;

	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) {};

ofFbo fbo;

ofTrueTypeFont font;

glm::vec3 x_noise;

glm::vec3 y_noise;

ofShader shader;

};

#include "ofApp.h"

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

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

	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	this->font.loadFont("fonts/Kazesawa-bold.ttf", 180, true, true, true);

	this->x_noise = glm::vec3(0.f, 0.f, 0.f);
	this->y_noise = glm::vec3(0.f, 0.f, 0.f);

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

	this->fbo.begin();
	ofClear(0);
	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);

	ofSetColor(255);
	string word = "RGB";
	this->font.drawString(word, this->font.stringWidth(word) * -0.5, ofGetHeight() * -0.25 + this->font.stringHeight(word) * 0.5);
	word = "DRIFT";
	this->font.drawString(word, this->font.stringWidth(word) * -0.5, ofGetHeight() * 0.25 + this->font.stringHeight(word) * 0.5);

	this->fbo.end();

	ofSeedRandom(39);

	this->x_noise.r = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);
	this->x_noise.g = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);
	this->x_noise.b = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

	this->y_noise.r = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);
	this->y_noise.g = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);
	this->y_noise.b = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);
}

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

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex", this->fbo.getTexture(), 1);
	this->shader.setUniform3f("x_noise", this->x_noise);
	this->shader.setUniform3f("y_noise", this->y_noise);

	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());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

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

this->font.loadFont("fonts/Kazesawa-bold.ttf", 180, true, true, true);

this->x_noise = glm::vec3(0.f, 0.f, 0.f);

this->y_noise = glm::vec3(0.f, 0.f, 0.f);

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

}

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

void ofApp::update() {

this->fbo.begin();

ofClear(0);

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

ofSetColor(255);

string word = "RGB";

this->font.drawString(word, this->font.stringWidth(word) * -0.5, ofGetHeight() * -0.25 + this->font.stringHeight(word) * 0.5);

word = "DRIFT";

this->font.drawString(word, this->font.stringWidth(word) * -0.5, ofGetHeight() * 0.25 + this->font.stringHeight(word) * 0.5);

this->fbo.end();

ofSeedRandom(39);

this->x_noise.r = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

this->x_noise.g = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

this->x_noise.b = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

this->y_noise.r = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

this->y_noise.g = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

this->y_noise.b = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

}

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

void ofApp::draw() {

this->shader.begin();

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

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

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

this->shader.setUniform3f("x_noise", this->x_noise);

this->shader.setUniform3f("y_noise", this->y_noise);

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

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex;
uniform vec3 x_noise;
uniform vec3 y_noise;

out vec4 outputColor;

// 2D Random
float random (in vec2 st) {
    return fract(sin(dot(st.xy,
                         vec2(12.9898,78.233)))
                 * 43758.5453123);
}

// 2D Noise based on Morgan McGuire @morgan3d
// https://www.shadertoy.com/view/4dS3Wd
float noise (in vec2 st) {
    vec2 i = floor(st);
    vec2 f = fract(st);

    // Four corners in 2D of a tile
    float a = random(i);
    float b = random(i + vec2(1.0, 0.0));
    float c = random(i + vec2(0.0, 1.0));
    float d = random(i + vec2(1.0, 1.0));

    // Smooth Interpolation

    // Cubic Hermine Curve.  Same as SmoothStep()
    vec2 u = f*f*(3.0-2.0*f);
    // u = smoothstep(0.,1.,f);

    // Mix 4 coorners percentages
    return mix(a, b, u.x) +
            (c - a)* u.y * (1.0 - u.x) +
            (d - b) * u.x * u.y;
}

void main() {

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

  float drift = 60.0;
  float r = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.r, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.r)))).r;
  float g = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.g, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.g)))).g;
  float b = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.b, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.b)))).b;
  outputColor = vec4(r, g, b, 1.0);
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex;

uniform vec3 x_noise;

uniform vec3 y_noise;

out vec4 outputColor;

// 2D Random

float random (in vec2 st) {

return fract(sin(dot(st.xy,

vec2(12.9898,78.233)))

* 43758.5453123);

}

// 2D Noise based on Morgan McGuire @morgan3d

// https://www.shadertoy.com/view/4dS3Wd

float noise (in vec2 st) {

vec2 i = floor(st);

vec2 f = fract(st);

// Four corners in 2D of a tile

float a = random(i);

float b = random(i + vec2(1.0, 0.0));

float c = random(i + vec2(0.0, 1.0));

float d = random(i + vec2(1.0, 1.0));

// Smooth Interpolation

// Cubic Hermine Curve. Same as SmoothStep()

vec2 u = f*f*(3.0-2.0*f);

// u = smoothstep(0.,1.,f);

// Mix 4 coorners percentages

return mix(a, b, u.x) +

(c - a)* u.y * (1.0 - u.x) +

(d - b) * u.x * u.y;

}

void main() {

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

float drift = 60.0;

float r = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.r, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.r)))).r;

float g = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.g, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.g)))).g;

float b = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.b, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.b)))).b;

outputColor = vec4(r, g, b, 1.0);

}

[ Link ]
https://github.com/junkiyoshi/Insta20180905

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2018年8月29日

Particle on numbers. openFrameworks

[ Video ]

[ About ]
数字の上のパーティクル

Particles on numbers.

[ 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) {};

	float font_size;
	ofTrueTypeFont font;

	ofFbo fbo;
	ofPixels pix;

	ofShader shader;
	int number_of_targets;
	vector<glm::vec4> targets;
	vector<glm::vec4> 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 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 font_size;

ofTrueTypeFont font;

ofFbo fbo;

ofPixels pix;

ofShader shader;

int number_of_targets;

vector<glm::vec4> targets;

vector<glm::vec4> colors;

};

#include "ofApp.h"

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

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

	this->font.loadFont("fonts/Kazesawa-Bold.ttf", 350, true, true, true);

	this->number_of_targets = 350;
	for (int i = 0; i < this->number_of_targets; i++) {

		glm::vec4 target = glm::vec4(0.0, 0.0, 0.0, 0.0);
		this->targets.push_back(target);

		glm::vec4  color = glm::vec4(1.0, 1.0, 1.0, 0.0);
		int color_type = ofRandom(6);
		switch (color_type) {
		case 0:
			color = glm::vec4(1.0, 0.0, 0.0, 0.0);
			break;
		case 1:
			color = glm::vec4(0.0, 1.0, 0.0, 0.0);
			break;
		case 2:
			color = glm::vec4(0.0, 0.0, 1.0, 0.0);
			break;
		case 3:
			color = glm::vec4(1.0, 1.0, 0.0, 0.0);
			break;
		case 4:
			color = glm::vec4(0.0, 1.0, 1.0, 0.0);
			break;
		case 5:
			color = glm::vec4(1.0, 0.0, 1.0, 0.0);
			break;
		}
		this->colors.push_back(color);
	}

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

	ofSeedRandom(39);

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

	ofSetColor(0);
	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);

	time_t now = time(NULL);
	struct tm *pnow = localtime(&now);
	string word = std::to_string(pnow->tm_sec);
	this->font.drawString(word, this->font.stringWidth(word) * -0.5, this->font.stringHeight(word) * 0.5);

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

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

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

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

			continue;
		}

		float x_increase = ofMap(ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.05), 0, 1, -20, 20);
		float y_increase = ofMap(ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.05), 0, 1, -20, 20);
		x += x_increase;
		y += y_increase;

		this->targets[i] = glm::vec4(x, y, 0.0, 0.0);
		i++;
	}
}

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

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniform4fv("targets", &this->targets[0].x, this->number_of_targets);
	this->shader.setUniform4fv("colors", &this->colors[0].x, this->number_of_targets);
	ofRect(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");

this->font.loadFont("fonts/Kazesawa-Bold.ttf", 350, true, true, true);

this->number_of_targets = 350;

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

glm::vec4 target = glm::vec4(0.0, 0.0, 0.0, 0.0);

this->targets.push_back(target);

glm::vec4 color = glm::vec4(1.0, 1.0, 1.0, 0.0);

int color_type = ofRandom(6);

switch (color_type) {

case 0:

color = glm::vec4(1.0, 0.0, 0.0, 0.0);

break;

case 1:

color = glm::vec4(0.0, 1.0, 0.0, 0.0);

break;

case 2:

color = glm::vec4(0.0, 0.0, 1.0, 0.0);

break;

case 3:

color = glm::vec4(1.0, 1.0, 0.0, 0.0);

break;

case 4:

color = glm::vec4(0.0, 1.0, 1.0, 0.0);

break;

case 5:

color = glm::vec4(1.0, 0.0, 1.0, 0.0);

break;

}

this->colors.push_back(color);

}

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

}

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

void ofApp::update() {

ofSeedRandom(39);

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

this->fbo.begin();

ofClear(0);

ofSetColor(0);

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

time_t now = time(NULL);

struct tm *pnow = localtime(&now);

string word = std::to_string(pnow->tm_sec);

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

this->fbo.end();

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

int i = 0;

while (i < this->number_of_targets) {

int x = ofRandom(ofGetWidth());

int y = ofRandom(ofGetHeight());

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

if (pix_color != ofColor(0)) {

continue;

}

float x_increase = ofMap(ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.05), 0, 1, -20, 20);

float y_increase = ofMap(ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.05), 0, 1, -20, 20);

x += x_increase;

y += y_increase;

this->targets[i] = glm::vec4(x, y, 0.0, 0.0);

i++;

}

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

void ofApp::draw() {

this->shader.begin();

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

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

this->shader.setUniform4fv("targets", &this->targets[0].x, this->number_of_targets);

this->shader.setUniform4fv("colors", &this->colors[0].x, this->number_of_targets);

ofRect(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 = 400;

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

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) * colors[i].x;
    float g = 0.01 / length(p - t) * colors[i].y;
    float b = 0.01 / length(p - t) * colors[i].z;
    vec3 c = vec3(smoothstep(0.03, 1.0, r), smoothstep(0.03, 1.0, g), smoothstep(0.03, 1.0, b));
    color += c;
  }

  outputColor = vec4(color, 1.0);
}

#version 150

const int number_of_targets = 400;

out vec4 outputColor;

uniform float time;

uniform vec2 resolution;

uniform vec4 targets[number_of_targets];

uniform vec4 colors[number_of_targets];

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) * colors[i].x;

float g = 0.01 / length(p - t) * colors[i].y;

float b = 0.01 / length(p - t) * colors[i].z;

vec3 c = vec3(smoothstep(0.03, 1.0, r), smoothstep(0.03, 1.0, g), smoothstep(0.03, 1.0, b));

color += c;

}

outputColor = vec4(color, 1.0);

}

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2018年8月27日2018年8月27日

Light font. openframeworks

[ Video ]

[ About ]
キラ☆キラ☆フォント

Light font.

[ 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) {};

	ofShader shader;
	int number_of_targets;
	vector<glm::vec4> targets;
	vector<float> sizes;
};

#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) {};

ofShader shader;

int number_of_targets;

vector<glm::vec4> targets;

vector<float> sizes;

};

#include "ofApp.h"

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

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

	ofTrueTypeFont font;
	font.loadFont("fonts/Kazesawa-bold.ttf", 350, true, true, true);
	string word = "EX";
	int sample_count = 200;
	this->number_of_targets = sample_count * word.size();

	ofPoint word_size(font.stringWidth(word), font.stringHeight(word));
	vector<ofPath> word_path = font.getStringAsPoints(word, true, false);
	for (int word_index = 0; word_index < word.size(); word_index++) {

		vector<ofPolyline> outline = word_path[word_index].getOutline();
		int tmp_sample_count = sample_count / outline.size();
		for (int outline_index = 0; outline_index < outline.size(); outline_index++) {

			outline[outline_index] = outline[outline_index].getResampledByCount(tmp_sample_count);
			vector<glm::vec3> vertices = outline[outline_index].getVertices();
			for (int vertices_index = 0; vertices_index < vertices.size(); vertices_index++) {

				glm::vec4 target = glm::vec4(vertices[vertices_index].x, vertices[vertices_index].y, vertices[vertices_index].z, 0.0);
				target += glm::vec4(word_size.x * -0.5 + ofGetWidth() * 0.5, word_size.y * 0.5 + ofGetHeight() * 0.5, 0.0, 0.0);
				this->targets.push_back(target);

				glm::vec4 color = glm::vec4(1.0, 1.0, 1.0, 0.0);
				this->sizes.push_back(1.0);
			}
		}
	}

	while (this->targets.size() < sample_count * word.size()) {

		this->targets.push_back(glm::vec4(0.0, 0.0, 0.0, 0.0));
		this->sizes.push_back(0.0);
	}

	cout << this->targets.size() << endl;

	this->shader.load("shader/shader.vert", "shader/shader.frag");
}
//--------------------------------------------------------------
void ofApp::update() {
	
	for (int i = 0; i < this->targets.size(); i++) {

		if (this->targets[i] == glm::vec4(0.0, 0.0, 0.0, 0.0)) { continue; }

		this->sizes[i] = ofNoise(this->targets[i].x * 0.05, this->targets[i].y * 0.05, ofGetFrameNum() * 0.05);
	}
}

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

	vector<glm::vec4> points;
	for (int i = 0; i < this->number_of_targets; i++) {

		glm::vec4 p = glm::vec4(this->targets[i].x, this->targets[i].y, 0, 0);
		points.push_back(p);
	}

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniform4fv("targets", &points[0].x, this->number_of_targets);
	this->shader.setUniform1fv("sizes", &this->sizes[0], this->number_of_targets);
	ofRect(0, 0, ofGetWidth(), ofGetHeight());

	this->shader.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofTrueTypeFont font;

font.loadFont("fonts/Kazesawa-bold.ttf", 350, true, true, true);

string word = "EX";

int sample_count = 200;

this->number_of_targets = sample_count * word.size();

ofPoint word_size(font.stringWidth(word), font.stringHeight(word));

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

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

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

int tmp_sample_count = sample_count / outline.size();

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

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

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

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

glm::vec4 target = glm::vec4(vertices[vertices_index].x, vertices[vertices_index].y, vertices[vertices_index].z, 0.0);

target += glm::vec4(word_size.x * -0.5 + ofGetWidth() * 0.5, word_size.y * 0.5 + ofGetHeight() * 0.5, 0.0, 0.0);

this->targets.push_back(target);

glm::vec4 color = glm::vec4(1.0, 1.0, 1.0, 0.0);

this->sizes.push_back(1.0);

}

while (this->targets.size() < sample_count * word.size()) {

this->targets.push_back(glm::vec4(0.0, 0.0, 0.0, 0.0));

this->sizes.push_back(0.0);

}

cout << this->targets.size() << endl;

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

}

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

void ofApp::update() {

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

if (this->targets[i] == glm::vec4(0.0, 0.0, 0.0, 0.0)) { continue; }

this->sizes[i] = ofNoise(this->targets[i].x * 0.05, this->targets[i].y * 0.05, ofGetFrameNum() * 0.05);

}

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

void ofApp::draw() {

vector<glm::vec4> points;

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

glm::vec4 p = glm::vec4(this->targets[i].x, this->targets[i].y, 0, 0);

points.push_back(p);

}

this->shader.begin();

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

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

this->shader.setUniform4fv("targets", &points[0].x, this->number_of_targets);

this->shader.setUniform1fv("sizes", &this->sizes[0], this->number_of_targets);

ofRect(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 = 400;

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

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 = (0.012 * sizes[i]) / length(p - t);
    v = smoothstep(0.03, 1.0, v);
    vec3 c = vec3(v);
    color += c;
  }

  outputColor = vec4(color, 1.0);
}

#version 150

const int number_of_targets = 400;

out vec4 outputColor;

uniform float time;

uniform vec2 resolution;

uniform vec4 targets[number_of_targets];

uniform float sizes[number_of_targets];

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 = (0.012 * sizes[i]) / length(p - t);

v = smoothstep(0.03, 1.0, v);

vec3 c = vec3(v);

color += c;

}

outputColor = vec4(color, 1.0);

}

[ Link ]
https://github.com/junkiyoshi/Insta20180827

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