circle – ページ 52 – プログラミング de 落描き

2021年2月4日2021年2月4日

Rotating. Draw by openFrameworks

[ Video ]

[ About ]
Rotating.

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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) {};

	int number_of_targets;
	vector<glm::vec2> target_list;
	vector<glm::vec3> color_list;
	ofShader shader;

	bool calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a);
};

#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;

bool calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a);

};

#include "ofApp.h"	

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

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

	ofBackground(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
	ofSetCircleResolution(72);

	this->number_of_targets = 40;
	for (int i = 0; i < this->number_of_targets; i++) {

		this->target_list.push_back(glm::vec2());
		this->color_list.push_back(glm::vec3(1, 1, 1));
	}

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

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

	ofSeedRandom(39);


}

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

	auto noise_seed_deg = ofRandom(1000);
	auto noise_seed_radius = ofRandom(1000);

	int index = 0;
	for (int deg = 0; deg < 360; deg += 18) {

		vector<glm::vec2> vertices;
		for (int i = 0; i < 50; i++) {

			auto noise_deg = deg + ofMap(ofNoise(noise_seed_deg, (ofGetFrameNum() + i) * 0.005), 0, 1, -360, 360);
			auto noise_radius = ofMap(ofNoise(noise_seed_radius, (ofGetFrameNum() + i) * 0.005), 0, 1, -350, 350);
			vertices.push_back(glm::vec2(360 + noise_radius * cos(noise_deg * DEG_TO_RAD), 360 + noise_radius * sin(noise_deg * DEG_TO_RAD)));
		}

		this->target_list[index++] = vertices.back();
		this->target_list[index++] = vertices.front();

		ofNoFill();
		ofBeginShape();
		ofVertices(vertices);
		ofEndShape();
	}

	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();
}

//--------------------------------------------------------------
bool ofApp::calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a) {

	auto distance = glm::distance(location_1, location_2);
	if (distance > radius_1 + radius_2 || distance < radius_1 - radius_2) { return false; }

	theta = atan2(location_2.y - location_1.y, location_2.x - location_1.x);
	auto cos_a = (pow(distance, 2) + pow(radius_1, 2) - pow(radius_2, 2)) / (2 * distance * radius_1);
	a = acos(cos_a);
	return 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);

ofSetCircleResolution(72);

this->number_of_targets = 40;

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

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

this->color_list.push_back(glm::vec3(1, 1, 1));

}

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

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

auto noise_seed_deg = ofRandom(1000);

auto noise_seed_radius = ofRandom(1000);

int index = 0;

for (int deg = 0; deg < 360; deg += 18) {

vector<glm::vec2> vertices;

for (int i = 0; i < 50; i++) {

auto noise_deg = deg + ofMap(ofNoise(noise_seed_deg, (ofGetFrameNum() + i) * 0.005), 0, 1, -360, 360);

auto noise_radius = ofMap(ofNoise(noise_seed_radius, (ofGetFrameNum() + i) * 0.005), 0, 1, -350, 350);

vertices.push_back(glm::vec2(360 + noise_radius * cos(noise_deg * DEG_TO_RAD), 360 + noise_radius * sin(noise_deg * DEG_TO_RAD)));

}

this->target_list[index++] = vertices.back();

this->target_list[index++] = vertices.front();

ofNoFill();

ofBeginShape();

ofVertices(vertices);

ofEndShape();

}

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();

}

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

bool ofApp::calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a) {

auto distance = glm::distance(location_1, location_2);

if (distance > radius_1 + radius_2 || distance < radius_1 - radius_2) { return false; }

theta = atan2(location_2.y - location_1.y, location_2.x - location_1.x);

auto cos_a = (pow(distance, 2) + pow(radius_1, 2) - pow(radius_2, 2)) / (2 * distance * radius_1);

a = acos(cos_a);

return 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 = 40;

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 = 0.02 / 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 = 40;

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 = 0.02 / 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/Insta20210204

2021年2月3日2021年2月3日

Rotating orbs. Draw by openFrameworks

[ Video ]

[ About ]
Rotating 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;

	bool calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a);
};

#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;

bool calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a);

};

#include "ofApp.h"	

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

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

	ofBackground(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
	ofSetCircleResolution(72);

	this->number_of_targets = 360;
	for (int i = 0; i < this->number_of_targets; i++) {

		this->target_list.push_back(glm::vec2());
		this->color_list.push_back(glm::vec3(1, 1, 1));
	}

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

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

	ofSeedRandom(39);

	int count = 0;
	int index = 0;
	int deg_start = ofGetFrameNum();
	for (int radius = 150; radius <= 300; radius += 15) {

		int deg_start = ofMap(ofNoise(radius * 0.005 + ofGetFrameNum() * 0.01), 0, 1, -180, 180);
		for (int deg = deg_start; deg < deg_start + 360; deg += 10) {

			this->target_list[index] = glm::vec2(360 + radius * cos(deg * DEG_TO_RAD), 360 + radius * sin(deg * DEG_TO_RAD));

			this->color_list[index] = glm::vec3(
				ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.05), 0, 1, 0.5, 1), 
				ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.05), 0, 1, 0.5, 1), 
				ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.05), 0, 1, 0.5, 1));

			index++;
		}
	}
}

//--------------------------------------------------------------
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();
}

//--------------------------------------------------------------
bool ofApp::calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a) {

	auto distance = glm::distance(location_1, location_2);
	if (distance > radius_1 + radius_2 || distance < radius_1 - radius_2) { return false; }

	theta = atan2(location_2.y - location_1.y, location_2.x - location_1.x);
	auto cos_a = (pow(distance, 2) + pow(radius_1, 2) - pow(radius_2, 2)) / (2 * distance * radius_1);
	a = acos(cos_a);
	return 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);

ofSetCircleResolution(72);

this->number_of_targets = 360;

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

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

this->color_list.push_back(glm::vec3(1, 1, 1));

}

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

}

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

void ofApp::update() {

ofSeedRandom(39);

int count = 0;

int index = 0;

int deg_start = ofGetFrameNum();

for (int radius = 150; radius <= 300; radius += 15) {

int deg_start = ofMap(ofNoise(radius * 0.005 + ofGetFrameNum() * 0.01), 0, 1, -180, 180);

for (int deg = deg_start; deg < deg_start + 360; deg += 10) {

this->target_list[index] = glm::vec2(360 + radius * cos(deg * DEG_TO_RAD), 360 + radius * sin(deg * DEG_TO_RAD));

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

ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.05), 0, 1, 0.5, 1),

ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.05), 0, 1, 0.5, 1));

index++;

}

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

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();

}

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

bool ofApp::calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a) {

auto distance = glm::distance(location_1, location_2);

if (distance > radius_1 + radius_2 || distance < radius_1 - radius_2) { return false; }

theta = atan2(location_2.y - location_1.y, location_2.x - location_1.x);

auto cos_a = (pow(distance, 2) + pow(radius_1, 2) - pow(radius_2, 2)) / (2 * distance * radius_1);

a = acos(cos_a);

return 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 = 360;

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 = 0.015 / 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 = 360;

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 = 0.015 / 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/Insta20210203

2021年2月2日2021年2月2日

Cross point log. Draw by openFrameworks

[ Video ]

[ About ]
Cross point log.

[ 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;

	bool calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a);
};

#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;

bool calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a);

};

#include "ofApp.h"	

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

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

	ofBackground(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
	ofSetCircleResolution(72);

	ofSetBackgroundAuto(false);

	this->number_of_targets = 150;
	for (int i = 0; i < this->number_of_targets; i++) {

		this->target_list.push_back(glm::vec2());
		this->color_list.push_back(glm::vec3(1, 1, 1));
	}

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

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

	ofSeedRandom(39);
}

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

	if (ofGetFrameNum() % 180 == 0) {
		
		ofBackground(0);
	}

	ofSetColor(255);
	vector<pair<glm::vec2, float>> circles;
	circles.push_back(make_pair(glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5), 230));
	for (int i = 0; i < 23; i++) {

		auto location = glm::vec2(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0035), 0, 1, 50, ofGetWidth() - 50), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0035), 0, 1, 50, ofGetHeight() - 50));
		auto radius = ofRandom(30, 60);

		auto circle = make_pair(location, radius);
		circles.push_back(circle);
	}

	vector<glm::vec2> tmp_target_list;
	vector<glm::vec3> tmp_color_list;
	for (auto circle : circles) {

		int p_1 = ofRandom(3);
		for (auto other : circles) {

			int p_2 = ofRandom(3);
			if (circle == other) { continue; }

			double theta, a;
			if (this->calculate_angle(circle.first, circle.second, other.first, other.second, theta, a)) {

				auto point_1 = circle.first + glm::vec2(circle.second * cos(theta + a), circle.second * sin(theta + a));
				auto point_2 = circle.first + glm::vec2(circle.second * cos(theta - a), circle.second * sin(theta - a));

				tmp_target_list.push_back(point_1);
				tmp_target_list.push_back(point_2);

				glm::vec3 tmp_color;
				switch (p_1)
				{
				case 0:
					tmp_color += glm::vec3(0.3, 0.2, 0.2);
					break;
				case 1:
					tmp_color += glm::vec3(0.2, 0.3, 0.2);
					break;
				case 2:
					tmp_color += glm::vec3(0.2, 0.2, 0.3);
					break;
				}

				switch (p_2)
				{
				case 0:
					tmp_color += glm::vec3(0.3, 0.2, 0.2);
					break;
				case 1:
					tmp_color += glm::vec3(0.2, 0.3, 0.2);
					break;
				case 2:
					tmp_color += glm::vec3(0.2, 0.2, 0.3);
					break;
				}

				tmp_color_list.push_back(tmp_color);
			}
		}
	}

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

		if (i < tmp_target_list.size()) {

			this->target_list[i] = tmp_target_list[i];
			this->color_list[i] = tmp_color_list[i / 2];
		}
		else {

			this->target_list[i] = glm::vec2();
			this->color_list[i] = glm::vec3();
		}
	}

	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();
}

//--------------------------------------------------------------
bool ofApp::calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a) {

	auto distance = glm::distance(location_1, location_2);
	if (distance > radius_1 + radius_2 || distance < radius_1 - radius_2) { return false; }

	theta = atan2(location_2.y - location_1.y, location_2.x - location_1.x);
	auto cos_a = (pow(distance, 2) + pow(radius_1, 2) - pow(radius_2, 2)) / (2 * distance * radius_1);
	a = acos(cos_a);
	return true;
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

ofSetCircleResolution(72);

ofSetBackgroundAuto(false);

this->number_of_targets = 150;

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

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

this->color_list.push_back(glm::vec3(1, 1, 1));

}

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

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

if (ofGetFrameNum() % 180 == 0) {

ofBackground(0);

}

ofSetColor(255);

vector<pair<glm::vec2, float>> circles;

circles.push_back(make_pair(glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5), 230));

for (int i = 0; i < 23; i++) {

auto location = glm::vec2(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0035), 0, 1, 50, ofGetWidth() - 50), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.0035), 0, 1, 50, ofGetHeight() - 50));

auto radius = ofRandom(30, 60);

auto circle = make_pair(location, radius);

circles.push_back(circle);

}

vector<glm::vec2> tmp_target_list;

vector<glm::vec3> tmp_color_list;

for (auto circle : circles) {

int p_1 = ofRandom(3);

for (auto other : circles) {

int p_2 = ofRandom(3);

if (circle == other) { continue; }

double theta, a;

if (this->calculate_angle(circle.first, circle.second, other.first, other.second, theta, a)) {

auto point_1 = circle.first + glm::vec2(circle.second * cos(theta + a), circle.second * sin(theta + a));

auto point_2 = circle.first + glm::vec2(circle.second * cos(theta - a), circle.second * sin(theta - a));

tmp_target_list.push_back(point_1);

tmp_target_list.push_back(point_2);

glm::vec3 tmp_color;

switch (p_1)

{

case 0:

tmp_color += glm::vec3(0.3, 0.2, 0.2);

break;

case 1:

tmp_color += glm::vec3(0.2, 0.3, 0.2);

break;

case 2:

tmp_color += glm::vec3(0.2, 0.2, 0.3);

break;

}

switch (p_2)

{

case 0:

tmp_color += glm::vec3(0.3, 0.2, 0.2);

break;

case 1:

tmp_color += glm::vec3(0.2, 0.3, 0.2);

break;

case 2:

tmp_color += glm::vec3(0.2, 0.2, 0.3);

break;

}

tmp_color_list.push_back(tmp_color);

}

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

if (i < tmp_target_list.size()) {

this->target_list[i] = tmp_target_list[i];

this->color_list[i] = tmp_color_list[i / 2];

}

else {

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

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

}

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();

}

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

bool ofApp::calculate_angle(glm::vec2 location_1, float radius_1, glm::vec2 location_2, float radius_2, double& theta, double& a) {

auto distance = glm::distance(location_1, location_2);

if (distance > radius_1 + radius_2 || distance < radius_1 - radius_2) { return false; }

theta = atan2(location_2.y - location_1.y, location_2.x - location_1.x);

auto cos_a = (pow(distance, 2) + pow(radius_1, 2) - pow(radius_2, 2)) / (2 * distance * radius_1);

a = acos(cos_a);

return 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 = 150;

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 = 0.005 / 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 = 150;

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 = 0.005 / 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/Insta20210202

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