GLSL – ページ 5 – プログラミング de 落描き

2021年1月29日2021年1月29日

Color orbs. Draw by openFrameworks

[ Video ]

[ About ]
Color orbs.

[ 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::vec2> target_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) {};

int number_of_targets;

vector<glm::vec2> target_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);

	this->number_of_targets = 30;
	for (int i = 0; i < this->number_of_targets; i++) {

		this->target_list.push_back(glm::vec2());
		this->color_list.push_back(glm::vec3());
	}

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

	ofSeedRandom(39);

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

		auto location_noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));
		this->target_list[i] = glm::vec2(
			ofMap(ofNoise(location_noise_seed.x, ofGetFrameNum() * 0.0005), 0, 1, 30, ofGetWidth() - 30),
			ofMap(ofNoise(location_noise_seed.y, ofGetFrameNum() * 0.0005), 0, 1, 30, ofGetHeight() - 30));
		
		auto color_noise_seed = glm::vec3(ofRandom(1000), ofRandom(1000), ofRandom(1000));
		this->color_list[i] = glm::vec3(
			ofMap(ofNoise(color_noise_seed.x, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1),
			ofMap(ofNoise(color_noise_seed.y, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1),
			ofMap(ofNoise(color_noise_seed.z, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1));
	}
}

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

	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->color_list[0].x, this->number_of_targets);

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

	this->shader.end();

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

		ofSetColor(this->color_list[i].x * 255, this->color_list[i].y * 255, this->color_list[i].z * 255);

		ofBeginShape();
		for (int deg = 0; deg <= 360; deg += 1) {

			ofVertex(this->target_list[i] + glm::vec2(30 * cos(deg * DEG_TO_RAD), 30 * sin(deg * DEG_TO_RAD)));
		}
		for (int deg = 360; deg >= 0; deg -= 1) {

			ofVertex(this->target_list[i] + glm::vec2(33 * cos(deg * DEG_TO_RAD), 33 * sin(deg * DEG_TO_RAD)));
		}
		ofEndShape(true);
	}
}

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

ofBackground(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

this->number_of_targets = 30;

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

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

this->color_list.push_back(glm::vec3());

}

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

}

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

void ofApp::update() {

ofSeedRandom(39);

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

auto location_noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000));

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

ofMap(ofNoise(location_noise_seed.x, ofGetFrameNum() * 0.0005), 0, 1, 30, ofGetWidth() - 30),

ofMap(ofNoise(location_noise_seed.y, ofGetFrameNum() * 0.0005), 0, 1, 30, ofGetHeight() - 30));

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

this->color_list[i] = glm::vec3(

ofMap(ofNoise(color_noise_seed.x, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1),

ofMap(ofNoise(color_noise_seed.y, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1),

ofMap(ofNoise(color_noise_seed.z, ofGetFrameNum() * 0.005), 0, 1, 0.25, 1));

}

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

void ofApp::draw() {

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->color_list[0].x, this->number_of_targets);

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

this->shader.end();

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

ofSetColor(this->color_list[i].x * 255, this->color_list[i].y * 255, this->color_list[i].z * 255);

ofBeginShape();

for (int deg = 0; deg <= 360; deg += 1) {

ofVertex(this->target_list[i] + glm::vec2(30 * cos(deg * DEG_TO_RAD), 30 * sin(deg * DEG_TO_RAD)));

}

for (int deg = 360; deg >= 0; deg -= 1) {

ofVertex(this->target_list[i] + glm::vec2(33 * cos(deg * DEG_TO_RAD), 33 * sin(deg * DEG_TO_RAD)));

}

ofEndShape(true);

}

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

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 = 30;

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 = 0.05 / 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 = 30;

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 = 0.05 / 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);

}

[ Link ]
https://github.com/junkiyoshi/Insta20210129

2021年1月28日2021年1月28日

Over 1505 days. Draw by openFrameworks

[ Video ]

[ About ]
Over 1505 days.

[ 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;
	ofFbo fbo1, fbo2;
	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 windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofTrueTypeFont font;

ofFbo fbo1, fbo2;

ofShader shader;

};

#include "ofApp.h"

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

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

	ofBackground(239);

	this->font.loadFont("fonts/Kazesawa-Bold.ttf", 180, true, true, true);
	this->fbo1.allocate(ofGetWidth(), ofGetHeight());
	this->fbo2.allocate(ofGetWidth(), ofGetHeight());
	this->shader.load("shader/shader.vert", "shader/shader.frag");
}

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

	this->fbo1.begin();
	ofClear(0);
	ofSetColor(39);

	vector<string> word_list = {
		"over",
		"15  5",
		"days"
	};

	vector<glm::vec2> base_location_list = {
		glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[0]) * 0.5, ofGetHeight() * 0.5 - 150),
		glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[1]) * 0.5, ofGetHeight() * 0.5 + 60),
		glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[2]) * 0.5, ofGetHeight() * 0.5 + 270)
	};

	this->font.drawString(word_list[0], base_location_list[0].x, base_location_list[0].y);
	this->font.drawString(word_list[1], base_location_list[1].x, base_location_list[1].y);
	this->font.drawString(word_list[2], base_location_list[2].x, base_location_list[2].y);

	this->fbo1.end();

	this->fbo2.begin();
	ofClear(0);
	ofSetColor(39);

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

	int radius = 30;

	ofFill();
	ofDrawCircle(glm::vec2(ofGetWidth() * 0.1, 0), radius);

	auto deg_span = 15;
	for (auto deg_start = ofGetFrameNum() * 0.2; deg_start <= ofGetFrameNum() * 0.5 + 360; deg_start += deg_span * 2) {

		vector<glm::vec2> vertices_1, vertices_2;
		for (auto deg = deg_start; deg <= deg_start + deg_span; deg++) {

			vertices_1.push_back(glm::vec2((radius + 10) * cos(deg * DEG_TO_RAD) + ofGetWidth() * 0.1, (radius + 10) * sin(deg * DEG_TO_RAD)));
			vertices_2.push_back(glm::vec2((radius * 14) * cos(deg * DEG_TO_RAD) + ofGetWidth() * 0.1, (radius * 14) * sin(deg * DEG_TO_RAD)));
		}

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

		ofBeginShape();
		ofVertices(vertices_1);
		ofVertices(vertices_2);
		ofEndShape(true);
	}
	
	this->fbo2.end();
}

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

	ofSetColor(255);
	ofFill();
	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex1", this->fbo1.getTexture(), 1);
	this->shader.setUniformTexture("tex2", this->fbo2.getTexture(), 2);

	ofDrawRectangle(glm::vec2(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");

ofBackground(239);

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

this->fbo1.allocate(ofGetWidth(), ofGetHeight());

this->fbo2.allocate(ofGetWidth(), ofGetHeight());

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

}

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

void ofApp::update() {

this->fbo1.begin();

ofClear(0);

ofSetColor(39);

vector<string> word_list = {

"over",

"15 5",

"days"

};

vector<glm::vec2> base_location_list = {

glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[0]) * 0.5, ofGetHeight() * 0.5 - 150),

glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[1]) * 0.5, ofGetHeight() * 0.5 + 60),

glm::vec2(ofGetWidth() * 0.5 - this->font.stringWidth(word_list[2]) * 0.5, ofGetHeight() * 0.5 + 270)

};

this->font.drawString(word_list[0], base_location_list[0].x, base_location_list[0].y);

this->font.drawString(word_list[1], base_location_list[1].x, base_location_list[1].y);

this->font.drawString(word_list[2], base_location_list[2].x, base_location_list[2].y);

this->fbo1.end();

this->fbo2.begin();

ofClear(0);

ofSetColor(39);

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

int radius = 30;

ofFill();

ofDrawCircle(glm::vec2(ofGetWidth() * 0.1, 0), radius);

auto deg_span = 15;

for (auto deg_start = ofGetFrameNum() * 0.2; deg_start <= ofGetFrameNum() * 0.5 + 360; deg_start += deg_span * 2) {

vector<glm::vec2> vertices_1, vertices_2;

for (auto deg = deg_start; deg <= deg_start + deg_span; deg++) {

vertices_1.push_back(glm::vec2((radius + 10) * cos(deg * DEG_TO_RAD) + ofGetWidth() * 0.1, (radius + 10) * sin(deg * DEG_TO_RAD)));

vertices_2.push_back(glm::vec2((radius * 14) * cos(deg * DEG_TO_RAD) + ofGetWidth() * 0.1, (radius * 14) * sin(deg * DEG_TO_RAD)));

}

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

ofBeginShape();

ofVertices(vertices_1);

ofVertices(vertices_2);

ofEndShape(true);

}

this->fbo2.end();

}

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

void ofApp::draw() {

ofSetColor(255);

ofFill();

this->shader.begin();

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

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

this->shader.setUniformTexture("tex1", this->fbo1.getTexture(), 1);

this->shader.setUniformTexture("tex2", this->fbo2.getTexture(), 2);

ofDrawRectangle(glm::vec2(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;
in vec2 texcoord;
out vec2 texCoordVarying;

void main(){

	texCoordVarying = texcoord;
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

in vec2 texcoord;

out vec2 texCoordVarying;

void main(){

texCoordVarying = texcoord;

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex1;
uniform sampler2DRect tex2;

in vec2 texCoordVarying;
out vec4 outputColor;

void main() {

  vec4 t1 = texture(tex1, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));
  vec4 t2 = texture(tex2, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));
  
  vec4 c;
  if(t1 != vec4(0.0) && t2 == vec4(0.0)){
  
	c = t1;
  }else if(t1 == vec4(0.0) && t2 != vec4(0.0)){
  
	c = t2;
  }else{
  
	c = vec4(vec3(0.937), 1.0);
  }

  outputColor = c;
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex1;

uniform sampler2DRect tex2;

in vec2 texCoordVarying;

out vec4 outputColor;

void main() {

vec4 t1 = texture(tex1, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

vec4 t2 = texture(tex2, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

vec4 c;

if(t1 != vec4(0.0) && t2 == vec4(0.0)){

c = t1;

}else if(t1 == vec4(0.0) && t2 != vec4(0.0)){

c = t2;

}else{

c = vec4(vec3(0.937), 1.0);

}

outputColor = c;

}

[ Link ]
https://github.com/junkiyoshi/Insta20210128/

2021年1月19日2021年1月19日

Circular Light. Draw by openFrameworks

[ Video ]

[ About ]
Circular Light.

[ 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::vec2> target_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) {};

int number_of_targets;

vector<glm::vec2> target_list;

ofShader shader;

};

#include "ofApp.h"

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

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

	this->number_of_targets = 100;
	for (int i = 0; i < this->number_of_targets; i++) {

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

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

	ofSeedRandom(39);

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

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

		int deg = ofMap(ofNoise(noise_seed.x, ofGetFrameNum() * 0.005 + i * 0.003), 0, 1, -360, 360);
		this->target_list[i] = glm::vec2(ofGetWidth() * 0.5 + 250 * cos(deg * DEG_TO_RAD), ofGetHeight() * 0.5 + 250 * sin(deg * DEG_TO_RAD));
	}
}

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

	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);

	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->number_of_targets = 100;

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

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

}

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

}

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

void ofApp::update() {

ofSeedRandom(39);

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

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

int deg = ofMap(ofNoise(noise_seed.x, ofGetFrameNum() * 0.005 + i * 0.003), 0, 1, -360, 360);

this->target_list[i] = glm::vec2(ofGetWidth() * 0.5 + 250 * cos(deg * DEG_TO_RAD), ofGetHeight() * 0.5 + 250 * sin(deg * DEG_TO_RAD));

}

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

void ofApp::draw() {

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);

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 = 100;

uniform float time;
uniform vec2 resolution;
uniform vec2 targets[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 = 0.02 / length(p - t);
    vec3 c = vec3(smoothstep(0.01, 1.0, v));
    color += c;
  }

  outputColor = vec4(color, 1.0);
}

#version 150

const int number_of_targets = 100;

uniform float time;

uniform vec2 resolution;

uniform vec2 targets[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 = 0.02 / length(p - t);

vec3 c = vec3(smoothstep(0.01, 1.0, v));

color += c;

}

outputColor = vec4(color, 1.0);

}

[ Link ]
https://github.com/junkiyoshi/Insta20210119

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