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2021年2月1日2021年2月1日

Orb and child orb. Draw by openFrameworks

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Orb and child orb.

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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;

	float noise_seed;
};

#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;

float noise_seed;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openframeworks");
	
	ofBackground(0);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

	this->number_of_targets = 4 * 5 * 5;
	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);

	if (ofGetFrameNum() % 60 < 45) {

		this->noise_seed += ofMap(ofGetFrameNum() % 60, 0, 45, 0.04, 0);
	}
}

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

	int range = 100;
	int radius = 20;
	for (int i = 0; i < this->number_of_targets; i += 4) {

		int x = (i / 4) % 5 * 144 + 72;
		int y = (i / 4) / 5 * 144 + 72;

		this->target_list[i] = glm::vec2(x + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5), y + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5));

		auto r_location = glm::vec2(x + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5), y + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5));
		auto g_location = glm::vec2(x + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5), y + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5));
		auto b_location = glm::vec2(x + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5), y + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5));

		auto r = ofMap(distance(this->target_list[i], r_location), 0, range, 1, 0.1);
		auto g = ofMap(distance(this->target_list[i], g_location), 0, range, 1, 0.1);
		auto b = ofMap(distance(this->target_list[i], b_location), 0, range, 1, 0.1);
		this->color_list[i] = glm::vec3(r, g, b);

		this->target_list[i + 1] = r_location;
		this->color_list[i + 1] = glm::vec3(0.3, 0.2, 0.2);
		this->target_list[i + 2] = g_location;
		this->color_list[i + 2] = glm::vec3(0.2, 0.3, 0.2);
		this->target_list[i + 3] = b_location;
		this->color_list[i + 3] = glm::vec3(0.2, 0.2, 0.3);

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

		auto r_angle = std::atan2(r_location.y - this->target_list[i].y, r_location.x - this->target_list[i].x);
		auto r_line_location = this->target_list[i] + glm::vec2(radius * cos(r_angle), radius * sin(r_angle));
		ofDrawLine(r_location, r_line_location);

		auto g_angle = std::atan2(g_location.y - this->target_list[i].y, g_location.x - this->target_list[i].x);
		auto g_line_location = this->target_list[i] + glm::vec2(radius * cos(g_angle), radius * sin(g_angle));
		ofDrawLine(g_location, g_line_location);

		auto b_angle = std::atan2(b_location.y - this->target_list[i].y, b_location.x - this->target_list[i].x);
		auto b_line_location = this->target_list[i] + glm::vec2(radius * cos(b_angle), radius * sin(b_angle));
		ofDrawLine(b_location, b_line_location);
	}

	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++) {

		if (i % 4 == 0) {

			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(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));
			}
			for (int deg = 360; deg >= 0; deg -= 1) {

				ofVertex(this->target_list[i] + glm::vec2((radius + 1) * cos(deg * DEG_TO_RAD), (radius + 1) * sin(deg * DEG_TO_RAD)));
			}
			ofEndShape(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);

this->number_of_targets = 4 * 5 * 5;

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);

if (ofGetFrameNum() % 60 < 45) {

this->noise_seed += ofMap(ofGetFrameNum() % 60, 0, 45, 0.04, 0);

}

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

void ofApp::draw() {

int range = 100;

int radius = 20;

for (int i = 0; i < this->number_of_targets; i += 4) {

int x = (i / 4) % 5 * 144 + 72;

int y = (i / 4) / 5 * 144 + 72;

this->target_list[i] = glm::vec2(x + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5), y + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5));

auto r_location = glm::vec2(x + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5), y + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5));

auto g_location = glm::vec2(x + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5), y + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5));

auto b_location = glm::vec2(x + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5), y + ofMap(ofNoise(ofRandom(1000), this->noise_seed), 0, 1, range * -0.5, range * 0.5));

auto r = ofMap(distance(this->target_list[i], r_location), 0, range, 1, 0.1);

auto g = ofMap(distance(this->target_list[i], g_location), 0, range, 1, 0.1);

auto b = ofMap(distance(this->target_list[i], b_location), 0, range, 1, 0.1);

this->color_list[i] = glm::vec3(r, g, b);

this->target_list[i + 1] = r_location;

this->color_list[i + 1] = glm::vec3(0.3, 0.2, 0.2);

this->target_list[i + 2] = g_location;

this->color_list[i + 2] = glm::vec3(0.2, 0.3, 0.2);

this->target_list[i + 3] = b_location;

this->color_list[i + 3] = glm::vec3(0.2, 0.2, 0.3);

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

auto r_angle = std::atan2(r_location.y - this->target_list[i].y, r_location.x - this->target_list[i].x);

auto r_line_location = this->target_list[i] + glm::vec2(radius * cos(r_angle), radius * sin(r_angle));

ofDrawLine(r_location, r_line_location);

auto g_angle = std::atan2(g_location.y - this->target_list[i].y, g_location.x - this->target_list[i].x);

auto g_line_location = this->target_list[i] + glm::vec2(radius * cos(g_angle), radius * sin(g_angle));

ofDrawLine(g_location, g_line_location);

auto b_angle = std::atan2(b_location.y - this->target_list[i].y, b_location.x - this->target_list[i].x);

auto b_line_location = this->target_list[i] + glm::vec2(radius * cos(b_angle), radius * sin(b_angle));

ofDrawLine(b_location, b_line_location);

}

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++) {

if (i % 4 == 0) {

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(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));

}

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

ofVertex(this->target_list[i] + glm::vec2((radius + 1) * cos(deg * DEG_TO_RAD), (radius + 1) * 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 = 100;

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 = 0.025 / 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 = 100;

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 = 0.025 / 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);

}

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2021年1月31日

Random walking orb. Draw by openFrameworks

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Random walking orb.

[ 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) {};

	vector<glm::vec3> base_color_list;

	int number_of_targets;
	vector<glm::vec2> target_list;
	vector<glm::vec3> target_color_list;
	
	int frame_span;
	float size;
	vector<glm::vec2> location_list;

	vector<int> current_index_list;
	vector<int> next_index_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) {};

vector<glm::vec3> base_color_list;

int number_of_targets;

vector<glm::vec2> target_list;

vector<glm::vec3> target_color_list;

int frame_span;

float size;

vector<glm::vec2> location_list;

vector<int> current_index_list;

vector<int> next_index_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);
	ofSetCircleResolution(72);
	ofSetLineWidth(5);

	this->base_color_list.push_back(glm::vec3(0.4, 0.25, 0.25));
	this->base_color_list.push_back(glm::vec3(0.25, 0.4, 0.25));
	this->base_color_list.push_back(glm::vec3(0.25, 0.25, 0.4));

	this->number_of_targets = 120;
	for (int i = 0; i < this->number_of_targets; i++) {

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

	this->frame_span = 60;
	this->size = 15;
	while (this->location_list.size() < 110) {

		auto location = glm::vec2(ofRandom(80, ofGetWidth() - 80), ofRandom(80, ofGetHeight() - 80));
		bool flag = true;
		for (int i = 0; i < this->location_list.size(); i++) {

			if (glm::distance(location, this->location_list[i]) < this->size * 3) {

				flag = false;
				break;
			}
		}

		if (flag) {

			this->location_list.push_back(location);
		}

		cout << this->location_list.size() << endl;
	}

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

		this->current_index_list.push_back(0);
		this->next_index_list.push_back(ofRandom(this->location_list.size()));
		this->color_list.push_back(this->base_color_list[ofRandom(this->base_color_list.size())]);
	}

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

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

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

		if (ofGetFrameNum() % (this->frame_span * 2) == 0) {

			int next_index = this->next_index_list[i];
			int current_index = next_index;

			vector<int> near_indexes;
			for (int location_index = 0; location_index < this->location_list.size(); location_index++) {

				if (current_index == location_index) { continue; }
				if (glm::distance(this->location_list[current_index], this->location_list[location_index]) < this->size * 5) {

					near_indexes.push_back(location_index);
				}
			}

			if (near_indexes.size() > 0) {

				next_index = near_indexes[ofRandom(near_indexes.size())];
			}

			this->current_index_list[i] = current_index;
			this->next_index_list[i] = next_index;
		}
	}

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

		if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

			this->target_list[i] = this->location_list[this->current_index_list[i]];
			this->target_color_list[i] = this->color_list[i];
		}
		else {

			this->target_list[i] = this->location_list[this->next_index_list[i]];
			this->target_color_list[i] = this->color_list[i];
		}
	}
}

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

	int frame_param = ofGetFrameNum() % this->frame_span;

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

		ofSetColor(ofMap(this->target_color_list[i].x, 0.25, 0.4, 0, 255), ofMap(this->target_color_list[i].y, 0.25, 0.4, 0, 255), ofMap(this->target_color_list[i].z, 0.25, 0.4, 0, 255));

		int current_index = this->current_index_list[i];
		int next_index = this->next_index_list[i];

		auto angle_current = std::atan2(this->location_list[next_index].y - this->location_list[current_index].y, this->location_list[next_index].x - this->location_list[current_index].x);
		auto satellite_point_current = this->location_list[current_index] + glm::vec2(this->size * cos(angle_current), this->size * sin(angle_current));
		auto angle_next = std::atan2(this->location_list[current_index].y - this->location_list[next_index].y, this->location_list[current_index].x - this->location_list[next_index].x);
		auto satellite_point_next = this->location_list[next_index] + glm::vec2(this->size * cos(angle_next), this->size * sin(angle_next));

		if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

			auto distance = glm::distance(satellite_point_next, satellite_point_current);
			distance = ofMap(frame_param, 0, this->frame_span, 0, distance);
			auto direction = satellite_point_next - satellite_point_current;
			ofDrawLine(satellite_point_current, satellite_point_current + glm::normalize(direction) * distance);
		}
		else {

			auto distance = glm::distance(satellite_point_next, satellite_point_current);
			distance = ofMap(frame_param, 0, this->frame_span, distance, 0);
			auto direction = satellite_point_next - satellite_point_current;
			ofDrawLine(satellite_point_next, satellite_point_next - glm::normalize(direction) * distance);
		}
	}

	ofSetColor(255);
	ofNoFill();
	for (int location_index = 0; location_index < this->location_list.size(); location_index++) {
		
		ofDrawCircle(this->location_list[location_index], this->size);
	}

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

		if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

			float p = ofGetFrameNum() % this->frame_span < this->frame_span * 0.5 ? 1 : ofMap(ofGetFrameNum() % this->frame_span, this->frame_span * 0.5, this->frame_span, 1, 0);
			this->target_color_list[i] = this->target_color_list[i] * p;
		}
		else {

			this->target_color_list[i] = this->target_color_list[i] * ofMap(ofGetFrameNum() % this->frame_span, 0, this->frame_span, 0, 1);
		}
	}

	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->target_color_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());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

ofSetCircleResolution(72);

ofSetLineWidth(5);

this->base_color_list.push_back(glm::vec3(0.4, 0.25, 0.25));

this->base_color_list.push_back(glm::vec3(0.25, 0.4, 0.25));

this->base_color_list.push_back(glm::vec3(0.25, 0.25, 0.4));

this->number_of_targets = 120;

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

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

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

}

this->frame_span = 60;

this->size = 15;

while (this->location_list.size() < 110) {

auto location = glm::vec2(ofRandom(80, ofGetWidth() - 80), ofRandom(80, ofGetHeight() - 80));

bool flag = true;

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

if (glm::distance(location, this->location_list[i]) < this->size * 3) {

flag = false;

break;

}

if (flag) {

this->location_list.push_back(location);

}

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

}

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

this->current_index_list.push_back(0);

this->next_index_list.push_back(ofRandom(this->location_list.size()));

this->color_list.push_back(this->base_color_list[ofRandom(this->base_color_list.size())]);

}

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

}

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

void ofApp::update() {

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

if (ofGetFrameNum() % (this->frame_span * 2) == 0) {

int next_index = this->next_index_list[i];

int current_index = next_index;

vector<int> near_indexes;

for (int location_index = 0; location_index < this->location_list.size(); location_index++) {

if (current_index == location_index) { continue; }

if (glm::distance(this->location_list[current_index], this->location_list[location_index]) < this->size * 5) {

near_indexes.push_back(location_index);

}

if (near_indexes.size() > 0) {

next_index = near_indexes[ofRandom(near_indexes.size())];

}

this->current_index_list[i] = current_index;

this->next_index_list[i] = next_index;

}

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

if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

this->target_list[i] = this->location_list[this->current_index_list[i]];

this->target_color_list[i] = this->color_list[i];

}

else {

this->target_list[i] = this->location_list[this->next_index_list[i]];

this->target_color_list[i] = this->color_list[i];

}

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

void ofApp::draw() {

int frame_param = ofGetFrameNum() % this->frame_span;

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

ofSetColor(ofMap(this->target_color_list[i].x, 0.25, 0.4, 0, 255), ofMap(this->target_color_list[i].y, 0.25, 0.4, 0, 255), ofMap(this->target_color_list[i].z, 0.25, 0.4, 0, 255));

int current_index = this->current_index_list[i];

int next_index = this->next_index_list[i];

auto angle_current = std::atan2(this->location_list[next_index].y - this->location_list[current_index].y, this->location_list[next_index].x - this->location_list[current_index].x);

auto satellite_point_current = this->location_list[current_index] + glm::vec2(this->size * cos(angle_current), this->size * sin(angle_current));

auto angle_next = std::atan2(this->location_list[current_index].y - this->location_list[next_index].y, this->location_list[current_index].x - this->location_list[next_index].x);

auto satellite_point_next = this->location_list[next_index] + glm::vec2(this->size * cos(angle_next), this->size * sin(angle_next));

if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

auto distance = glm::distance(satellite_point_next, satellite_point_current);

distance = ofMap(frame_param, 0, this->frame_span, 0, distance);

auto direction = satellite_point_next - satellite_point_current;

ofDrawLine(satellite_point_current, satellite_point_current + glm::normalize(direction) * distance);

}

else {

auto distance = glm::distance(satellite_point_next, satellite_point_current);

distance = ofMap(frame_param, 0, this->frame_span, distance, 0);

auto direction = satellite_point_next - satellite_point_current;

ofDrawLine(satellite_point_next, satellite_point_next - glm::normalize(direction) * distance);

}

ofSetColor(255);

ofNoFill();

for (int location_index = 0; location_index < this->location_list.size(); location_index++) {

ofDrawCircle(this->location_list[location_index], this->size);

}

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

if (ofGetFrameNum() % (this->frame_span * 2) < this->frame_span) {

float p = ofGetFrameNum() % this->frame_span < this->frame_span * 0.5 ? 1 : ofMap(ofGetFrameNum() % this->frame_span, this->frame_span * 0.5, this->frame_span, 1, 0);

this->target_color_list[i] = this->target_color_list[i] * p;

}

else {

this->target_color_list[i] = this->target_color_list[i] * ofMap(ofGetFrameNum() % this->frame_span, 0, this->frame_span, 0, 1);

}

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->target_color_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 = 120;

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 = 0.035 / 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 = 120;

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 = 0.035 / 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/Insta20210131

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Glowing Intersection of circles. Draw by openFrameworks

[ Video ]

[ About ]
Glowing Intersection of circles.

[ 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 = 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() {

	ofSetColor(255);
	vector<pair<glm::vec2, float>> circles;
	circles.push_back(make_pair(glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5), 250));
	for (int i = 0; i < 20; i++) {

		auto location = glm::vec2(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.001), 0, 1, 0, ofGetWidth()), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.001), 0, 1, 0, ofGetHeight()));
		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);

		ofNoFill();
		ofDrawCircle(circle.first, circle.second);
		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);

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() {

ofSetColor(255);

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

circles.push_back(make_pair(glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5), 250));

for (int i = 0; i < 20; i++) {

auto location = glm::vec2(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.001), 0, 1, 0, ofGetWidth()), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.001), 0, 1, 0, ofGetHeight()));

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);

ofNoFill();

ofDrawCircle(circle.first, circle.second);

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 = 0.035 / 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 = 0.035 / 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/Insta20210130

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