Shader – ページ 16 – プログラミング de 落描き

2018年8月27日2018年8月27日

Light font. openframeworks

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[ About ]
キラ☆キラ☆フォント

Light font.

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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 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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2018年8月26日2018年8月26日

Light ring. openfameworks

[ Video ]

[ About ]
光の輪っか

Light rings.

[ 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) {};

	int number_of_targets;
	vector<glm::vec4> targets;
	float size_start, size_max;
	vector<float> sizes;

	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) {};

int number_of_targets;

vector<glm::vec4> targets;

float size_start, size_max;

vector<float> sizes;

ofShader shader;

};

#include "ofApp.h"

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

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

	this->size_start = 0.001;
	this->size_max = 0.5;

	this->number_of_targets = 15;
	for (int i = 0; i < this->number_of_targets; i++) {

		glm::vec4 target = glm::vec4(ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), 0.f, 0.f);
		this->targets.push_back(target);

		this->sizes.push_back(ofRandom(this->size_start, this->size_max));
	}

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

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

		if (this->sizes[i] >= this->size_max) {
			
			this->targets[i] = glm::vec4(ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), 0.f, 0.f);
			this->sizes[i] = this->size_start;
		}
		else {

			this->sizes[i] += 0.01;
		}
	}
}

//--------------------------------------------------------------
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.setUniform1fv("sizes", &this->sizes[0], this->number_of_targets);
	this->shader.setUniform1f("size_max", this->size_max);
	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");

this->size_start = 0.001;

this->size_max = 0.5;

this->number_of_targets = 15;

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

glm::vec4 target = glm::vec4(ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), 0.f, 0.f);

this->targets.push_back(target);

this->sizes.push_back(ofRandom(this->size_start, this->size_max));

}

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

}

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

void ofApp::update() {

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

if (this->sizes[i] >= this->size_max) {

this->targets[i] = glm::vec4(ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), 0.f, 0.f);

this->sizes[i] = this->size_start;

}

else {

this->sizes[i] += 0.01;

}

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

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

this->shader.setUniform1f("size_max", this->size_max);

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 = 15;

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

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 = 0.02 * (size_max - sizes[i]) / abs(length(p - t) - sizes[i]);
    vec3 c = vec3(v);
    color += c;
  }

  outputColor = vec4(color, 1.0);
}

#version 150

const int number_of_targets = 15;

out vec4 outputColor;

uniform float time;

uniform vec2 resolution;

uniform vec4 targets[number_of_targets];

uniform float sizes[number_of_targets];

uniform float size_max;

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 = 0.02 * (size_max - sizes[i]) / abs(length(p - t) - sizes[i]);

vec3 c = vec3(v);

color += c;

}

outputColor = vec4(color, 1.0);

}

[ Link ]
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2018年8月25日

Red back black spheres. openFrameworks

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[ About ]
赤い背景、黒い粒子

Red back blask spheres.

[ 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) {};

	ofxBox2d box2d;
	ofShader shader;
	int number_of_targets;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<glm::vec4> colors;
};

#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) {};

ofxBox2d box2d;

ofShader shader;

int number_of_targets;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<glm::vec4> colors;

};

#include "ofApp.h"

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

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

	this->box2d.init();
	this->box2d.setGravity(0, 0);
	this->box2d.createBounds();
	this->box2d.setFPS(30);
	this->box2d.registerGrabbing();

	this->number_of_targets = 255;

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

		this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));
		this->circles.back().get()->setPhysics(1.5, 0.5, 0.1);
		this->circles.back().get()->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), 10);

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

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

	float direction = ofGetFrameNum() % 60 == 0 ? 1.0 : -0.25;
	//float direction = ofGetKeyPressed() ? 2.0 : -0.5;

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

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

			float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());
			if (distance < 80) {

				this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), 1.0 * direction);
				this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), 1.0 * direction);
			}
		}
	}

	this->box2d.update();
}

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

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

		glm::vec4 p = glm::vec4(this->circles[i]->getPosition().x, this->circles[i]->getPosition().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.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(1280, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

this->box2d.init();

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

this->box2d.createBounds();

this->box2d.setFPS(30);

this->box2d.registerGrabbing();

this->number_of_targets = 255;

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

this->circles.push_back(shared_ptr<ofxBox2dCircle>(new ofxBox2dCircle));

this->circles.back().get()->setPhysics(1.5, 0.5, 0.1);

this->circles.back().get()->setup(this->box2d.getWorld(), ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), 10);

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

this->colors.push_back(color);

}

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

}

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

void ofApp::update() {

float direction = ofGetFrameNum() % 60 == 0 ? 1.0 : -0.25;

//float direction = ofGetKeyPressed() ? 2.0 : -0.5;

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

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

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

if (distance < 80) {

this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), 1.0 * direction);

this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), 1.0 * direction);

}

this->box2d.update();

}

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

void ofApp::draw() {

vector<glm::vec4> points;

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

glm::vec4 p = glm::vec4(this->circles[i]->getPosition().x, this->circles[i]->getPosition().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.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(1280, 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 = 255;

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(1.0, 0.0, 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 = 255;

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(1.0, 0.0, 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);

}

[ Link ]
https://github.com/junkiyoshi/Insta20180825

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