2018年9月 – ページ 10 – プログラミング de 落描き

2018年9月3日2018年9月3日

After images. openframeworks

[ Video ]

[ About ]
シェーダに前フレームをテキスチャとして送信、残像として重ねて描写。

Send the previous frame as a texture to the shader and overlay it as an afterimage.

[ Source ]

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

class ofApp : public ofBaseApp {

public:
	void setup();
	void update();
	void draw();

	void keyPressed(int key) {};
	void keyReleased(int key) {};
	void mouseMoved(int x, int y) {};
	void mouseDragged(int x, int y, int button) {};
	void mousePressed(int x, int y, int button) {};
	void mouseReleased(int x, int y, int button) {};
	void mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	int number_of_targets;

	vector<glm::vec4> targets;
	vector<glm::vec4> colors;

	ofFbo src;
	ofFbo dst;

	ofShader shader;
};

#pragma once

#include "ofMain.h"

#include <opencv2/opencv.hpp>

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

void mouseMoved(int x, int y) {};

void mouseDragged(int x, int y, int button) {};

void mousePressed(int x, int y, int button) {};

void mouseReleased(int x, int y, int button) {};

void mouseEntered(int x, int y) {};

void mouseExited(int x, int y) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

int number_of_targets;

vector<glm::vec4> targets;

vector<glm::vec4> colors;

ofFbo src;

ofFbo dst;

ofShader shader;

};

#include "ofApp.h"

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

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

	this->number_of_targets = 21;
	for (int i = 0; i < this->number_of_targets; i++) {

		this->targets.push_back(glm::vec4(ofRandom(ofGetWidth()), ofRandom(ofGetHeight()), 0.0, 0.0));
		glm::vec4  color = glm::vec4(1.0, 1.0, 1.0, 0.0);
		int color_type = i % 3;
		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;
		}
		this->colors.push_back(color);
	}

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

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

	ofSeedRandom(this->number_of_targets);

	glm::vec4 rgb_point;
	for (int i = 0; i < this->number_of_targets; i++) {
		
		if (i % 3 == 0) {

			rgb_point = glm::vec4(ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.005) * ofGetWidth(), ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.005) * ofGetHeight(), 0.0, 0.0);
		}

		this->targets[i] = rgb_point + glm::vec4(ofMap(ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.01), 0, 1, -30, 30), ofMap(ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.01), 0, 1, -30, 30), 0.0, 0.0);
	}
}

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

	this->dst.begin();
	ofClear(0);

	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);
	this->shader.setUniformTexture("tex0", this->src.getTexture(), 1);

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

	this->dst.end();

	ofSetColor(255);
	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());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

this->number_of_targets = 21;

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

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

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

int color_type = i % 3;

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;

}

this->colors.push_back(color);

}

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

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

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

}

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

void ofApp::update() {

ofSeedRandom(this->number_of_targets);

glm::vec4 rgb_point;

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

if (i % 3 == 0) {

rgb_point = glm::vec4(ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.005) * ofGetWidth(), ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.005) * ofGetHeight(), 0.0, 0.0);

}

this->targets[i] = rgb_point + glm::vec4(ofMap(ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.01), 0, 1, -30, 30), ofMap(ofNoise(ofRandom(this->number_of_targets), ofGetFrameNum() * 0.01), 0, 1, -30, 30), 0.0, 0.0);

}

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

void ofApp::draw() {

this->dst.begin();

ofClear(0);

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);

this->shader.setUniformTexture("tex0", this->src.getTexture(), 1);

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

this->shader.end();

this->dst.end();

ofSetColor(255);

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());

}

#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

const int number_of_targets = 21;

uniform float time;
uniform vec2 resolution;
uniform vec4 targets[number_of_targets];
uniform vec4 colors[number_of_targets];
uniform sampler2DRect tex0;

in vec2 texCoordVarying;
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 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(0.003, 1.0, r), smoothstep(0.003, 1.0, g), smoothstep(0.003, 1.0, b));
    color += c;
  }

  vec4 tex = texture(tex0, texCoordVarying);

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

#version 150

const int number_of_targets = 21;

uniform float time;

uniform vec2 resolution;

uniform vec4 targets[number_of_targets];

uniform vec4 colors[number_of_targets];

uniform sampler2DRect tex0;

in vec2 texCoordVarying;

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 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(0.003, 1.0, r), smoothstep(0.003, 1.0, g), smoothstep(0.003, 1.0, b));

color += c;

}

vec4 tex = texture(tex0, texCoordVarying);

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

}

[ Link ]
https://github.com/junkiyoshi/Insta20180903

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2018年9月2日2018年9月2日

Mix 2 Video. openFrameworks

[ Video ]

[ About ]
2つの動画をミックス

Mix 2 video.

[ Source ]

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

class ofApp : public ofBaseApp {

public:
	void setup();
	void update();
	void draw();

	void keyPressed(int key) {};
	void keyReleased(int key) {};
	void mouseMoved(int x, int y) {};
	void mouseDragged(int x, int y, int button) {};
	void mousePressed(int x, int y, int button) {};
	void mouseReleased(int x, int y, int button) {};
	void mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	cv::Size cap_size;

	cv::VideoCapture cap1;
	cv::Mat frame1;
	ofImage image1;

	cv::VideoCapture cap2;
	cv::Mat frame2;
	ofImage image2;

	ofFbo src;
	ofFbo dst;

	ofShader shader;
};

#pragma once

#include "ofMain.h"

#include <opencv2/opencv.hpp>

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

void mouseMoved(int x, int y) {};

void mouseDragged(int x, int y, int button) {};

void mousePressed(int x, int y, int button) {};

void mouseReleased(int x, int y, int button) {};

void mouseEntered(int x, int y) {};

void mouseExited(int x, int y) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

cv::Size cap_size;

cv::VideoCapture cap1;

cv::Mat frame1;

ofImage image1;

cv::VideoCapture cap2;

cv::Mat frame2;

ofImage image2;

ofFbo src;

ofFbo dst;

ofShader shader;

};

#include "ofApp.h"

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

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

	this->cap1.open("video1.mp4");
	this->cap2.open("video2.mp4");
	this->cap_size = cv::Size(1280, 720);

	this->image1.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);
	this->frame1 = cv::Mat(cv::Size(this->image1.getWidth(), this->image1.getHeight()), CV_MAKETYPE(CV_8UC3, this->image1.getPixels().getNumChannels()), this->image1.getPixels().getData(), 0);

	this->image2.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);
	this->frame2 = cv::Mat(cv::Size(this->image2.getWidth(), this->image2.getHeight()), CV_MAKETYPE(CV_8UC3, this->image2.getPixels().getNumChannels()), this->image2.getPixels().getData(), 0);

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

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

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

	cv::Mat src;

	this->cap1 >> src;
	if (src.empty()) {

		this->cap1.set(CV_CAP_PROP_POS_FRAMES, 1);
		return;
	}
	cv::resize(src, this->frame1, this->cap_size);
	cv::cvtColor(this->frame1, this->frame1, CV_BGR2RGB);
	this->image1.update();

	this->cap2 >> src;
	if (src.empty()) {

		this->cap2.set(CV_CAP_PROP_POS_FRAMES, 1);
		return;
	}
	cv::resize(src, this->frame2, this->cap_size);
	cv::cvtColor(this->frame2, this->frame2, CV_BGR2RGB);
	this->image2.update();
}

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

	this->dst.begin();
	ofClear(0);

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex1", this->image1, 1);
	this->shader.setUniformTexture("tex2", this->image2, 2);

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

	this->dst.end();

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

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

	ofGLWindowSettings settings;
	settings.setGLVersion(3, 2);
	settings.setSize(1280, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

this->cap1.open("video1.mp4");

this->cap2.open("video2.mp4");

this->cap_size = cv::Size(1280, 720);

this->image1.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);

this->frame1 = cv::Mat(cv::Size(this->image1.getWidth(), this->image1.getHeight()), CV_MAKETYPE(CV_8UC3, this->image1.getPixels().getNumChannels()), this->image1.getPixels().getData(), 0);

this->image2.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);

this->frame2 = cv::Mat(cv::Size(this->image2.getWidth(), this->image2.getHeight()), CV_MAKETYPE(CV_8UC3, this->image2.getPixels().getNumChannels()), this->image2.getPixels().getData(), 0);

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

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

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

}

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

void ofApp::update() {

cv::Mat src;

this->cap1 >> src;

if (src.empty()) {

this->cap1.set(CV_CAP_PROP_POS_FRAMES, 1);

return;

}

cv::resize(src, this->frame1, this->cap_size);

cv::cvtColor(this->frame1, this->frame1, CV_BGR2RGB);

this->image1.update();

this->cap2 >> src;

if (src.empty()) {

this->cap2.set(CV_CAP_PROP_POS_FRAMES, 1);

return;

}

cv::resize(src, this->frame2, this->cap_size);

cv::cvtColor(this->frame2, this->frame2, CV_BGR2RGB);

this->image2.update();

}

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

void ofApp::draw() {

this->dst.begin();

ofClear(0);

this->shader.begin();

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

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

this->shader.setUniformTexture("tex1", this->image1, 1);

this->shader.setUniformTexture("tex2", this->image2, 2);

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

this->shader.end();

this->dst.end();

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

}

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

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;
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;

float mod289(float x){return x - floor(x * (1.0 / 289.0)) * 289.0;}
vec4 mod289(vec4 x){return x - floor(x * (1.0 / 289.0)) * 289.0;}
vec4 perm(vec4 x){return mod289(((x * 34.0) + 1.0) * x);}

float noise(vec3 p){
    vec3 a = floor(p);
    vec3 d = p - a;
    d = d * d * (3.0 - 2.0 * d);

    vec4 b = a.xxyy + vec4(0.0, 1.0, 0.0, 1.0);
    vec4 k1 = perm(b.xyxy);
    vec4 k2 = perm(k1.xyxy + b.zzww);

    vec4 c = k2 + a.zzzz;
    vec4 k3 = perm(c);
    vec4 k4 = perm(c + 1.0);

    vec4 o1 = fract(k3 * (1.0 / 41.0));
    vec4 o2 = fract(k4 * (1.0 / 41.0));

    vec4 o3 = o2 * d.z + o1 * (1.0 - d.z);
    vec2 o4 = o3.yw * d.x + o3.xz * (1.0 - d.x);

    return o4.y * d.y + o4.x * (1.0 - d.y);
}

void main() {

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

  float v = noise(vec3(p.x * 1.5, p.y * 1.5 + time, 0.0));

  vec4 c1 = texture(tex1, texCoordVarying) * v;
  vec4 c2 = texture(tex2, texCoordVarying) * (1 - v);

  outputColor = c1 + c2;
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex1;

uniform sampler2DRect tex2;

in vec2 texCoordVarying;

out vec4 outputColor;

float mod289(float x){return x - floor(x * (1.0 / 289.0)) * 289.0;}

vec4 mod289(vec4 x){return x - floor(x * (1.0 / 289.0)) * 289.0;}

vec4 perm(vec4 x){return mod289(((x * 34.0) + 1.0) * x);}

float noise(vec3 p){

vec3 a = floor(p);

vec3 d = p - a;

d = d * d * (3.0 - 2.0 * d);

vec4 b = a.xxyy + vec4(0.0, 1.0, 0.0, 1.0);

vec4 k1 = perm(b.xyxy);

vec4 k2 = perm(k1.xyxy + b.zzww);

vec4 c = k2 + a.zzzz;

vec4 k3 = perm(c);

vec4 k4 = perm(c + 1.0);

vec4 o1 = fract(k3 * (1.0 / 41.0));

vec4 o2 = fract(k4 * (1.0 / 41.0));

vec4 o3 = o2 * d.z + o1 * (1.0 - d.z);

vec2 o4 = o3.yw * d.x + o3.xz * (1.0 - d.x);

return o4.y * d.y + o4.x * (1.0 - d.y);

}

void main() {

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

float v = noise(vec3(p.x * 1.5, p.y * 1.5 + time, 0.0));

vec4 c1 = texture(tex1, texCoordVarying) * v;

vec4 c2 = texture(tex2, texCoordVarying) * (1 - v);

outputColor = c1 + c2;

}

[ Link ]
https://github.com/junkiyoshi/Insta20180902

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2018年9月1日

Particles escape from tip of pen. openFrameworks

[ Video ]

[ About ]
ペン先から逃げるパーティクル

Particles escape from tip of pen.

[ 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;
	vector<float> sizes;
};

#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;

vector<float> sizes;

};

#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 = 150;

	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()), 15);

		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->sizes.push_back(1.0f);
	}

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

	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(), 0.1);
				this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), 0.1);
			}
		}
	}

	ofPoint mouse = ofPoint(ofGetMouseX(), ofGetMouseY());
	for (int i = 0; i < this->circles.size(); i++) {

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

			this->circles[i]->addForce(this->circles[i]->getPosition() - mouse, 10.0);
		}
	}

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

		this->sizes[i] = ofMap(this->circles[i]->getVelocity().length(), 0, 10, 0, 1);
	}

	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);
	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(1280, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

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#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 = 150;

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()), 15);

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->sizes.push_back(1.0f);

}

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

}

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

void ofApp::update() {

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(), 0.1);

this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), 0.1);

}

ofPoint mouse = ofPoint(ofGetMouseX(), ofGetMouseY());

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

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

if (distance < 80) {

this->circles[i]->addForce(this->circles[i]->getPosition() - mouse, 10.0);

}

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

this->sizes[i] = ofMap(this->circles[i]->getVelocity().length(), 0, 10, 0, 1);

}

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);

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(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 = 150;

out vec4 outputColor;
uniform float time;
uniform vec2 resolution;
uniform vec4 targets[number_of_targets];
uniform vec4 colors[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 r = 0.03 / length(p - t) * colors[i].x * sizes[i];
    float g = 0.03 / length(p - t) * colors[i].y * sizes[i];
    float b = 0.03 / length(p - t) * colors[i].z * sizes[i];
    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 = 150;

out vec4 outputColor;

uniform float time;

uniform vec2 resolution;

uniform vec4 targets[number_of_targets];

uniform vec4 colors[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 r = 0.03 / length(p - t) * colors[i].x * sizes[i];

float g = 0.03 / length(p - t) * colors[i].y * sizes[i];

float b = 0.03 / length(p - t) * colors[i].z * sizes[i];

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/Insta20180901

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