GLSL – ページ 11 – プログラミング de 落描き

2018年12月19日2018年12月19日

Flock System + GLSL. openFrameworks

[ Video ]

[ About ]
群れシステムの座標をGLSLへ送信。群れになるとピカピカします

Send coordinate of flock system to GLSL. It will be shiny when it comes to flocks.

[ Source ]

#pragma once
#include "ofMain.h"
#include "Particle.h"

class ofApp : public ofBaseApp {

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

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

	ofShader shader;

	int number_of_particle;
	vector<unique_ptr<Particle>> particles;
};

#pragma once

#include "ofMain.h"

#include "Particle.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofShader shader;

int number_of_particle;

vector<unique_ptr<Particle>> particles;

};

#include "ofApp.h"

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

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

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

	this->number_of_particle = 50;
	for (int i = 0; i < this->number_of_particle; i++) {

		auto particle = make_unique<Particle>();
		this->particles.push_back(move(particle));
	}
}

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

	for (auto& particle : this->particles) {
		
		particle->update(this->particles);
	}
}

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

	vector<glm::vec2> targets;
	vector<float> force;
	for (auto& particle : this->particles) {
		
		targets.push_back(particle->getLocation());
		force.push_back(std::min(ofMap(glm::length(particle->getAcceleration()), 0, 2, 0.2, 1), 1.f));
	}

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniform2fv("targets", &targets[0].x, this->number_of_particle);
	this->shader.setUniform1fv("force", &force[0], this->number_of_particle);

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

	this->shader.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

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

this->number_of_particle = 50;

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

auto particle = make_unique<Particle>();

this->particles.push_back(move(particle));

}

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

void ofApp::update() {

for (auto& particle : this->particles) {

particle->update(this->particles);

}

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

void ofApp::draw() {

vector<glm::vec2> targets;

vector<float> force;

for (auto& particle : this->particles) {

targets.push_back(particle->getLocation());

force.push_back(std::min(ofMap(glm::length(particle->getAcceleration()), 0, 2, 0.2, 1), 1.f));

}

this->shader.begin();

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

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

this->shader.setUniform2fv("targets", &targets[0].x, this->number_of_particle);

this->shader.setUniform1fv("force", &force[0], this->number_of_particle);

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());

}

#pragma once
#include "ofMain.h"

class Particle {
public:
	Particle();
	~Particle();

	void update(vector<unique_ptr<Particle>>& particles);
	void draw();
	glm::vec2 separate(vector<unique_ptr<Particle>>& particles);
	glm::vec2 align(vector<unique_ptr<Particle>>& particles);
	glm::vec2 cohesion(vector<unique_ptr<Particle>>& particles);
	glm::vec2 seek(glm::vec2 target);
	void applyForce(glm::vec2 force);
	glm::vec2 getLocation();
	glm::vec2 getVelocity();
	glm::vec2 getAcceleration();

private:
	glm::vec2 location;
	glm::vec2 velocity;
	glm::vec2 acceleration;
	glm::vec2 prev_acceleration;

	float range;
	float max_force;
	float max_speed;
	int wall;
};

#pragma once

#include "ofMain.h"

class Particle {

public:

Particle();

~Particle();

void update(vector<unique_ptr<Particle>>& particles);

void draw();

glm::vec2 separate(vector<unique_ptr<Particle>>& particles);

glm::vec2 align(vector<unique_ptr<Particle>>& particles);

glm::vec2 cohesion(vector<unique_ptr<Particle>>& particles);

glm::vec2 seek(glm::vec2 target);

void applyForce(glm::vec2 force);

glm::vec2 getLocation();

glm::vec2 getVelocity();

glm::vec2 getAcceleration();

private:

glm::vec2 location;

glm::vec2 velocity;

glm::vec2 acceleration;

glm::vec2 prev_acceleration;

float range;

float max_force;

float max_speed;

int wall;

};

#include "Particle.h"

Particle::Particle() {

	this->location = glm::vec2(ofRandom(ofGetWidth()), ofRandom(ofGetHeight()));
	this->velocity = glm::vec2(ofRandom(-1, 1), ofRandom(-1, 1));

	this->range = 40;
	this->max_force = 1;
	this->max_speed = 8;
	this->wall = 20;
}

Particle::~Particle() {

}

void Particle::update(vector<unique_ptr<Particle>>& particles) {

	// 分離
	glm::vec2 separate = this->separate(particles);
	this->applyForce(separate);

	// 整列
	glm::vec2 align = this->align(particles);
	this->applyForce(align);

	// 結合
	glm::vec2 cohesion = this->cohesion(particles);
	this->applyForce(cohesion);

	// 自我
	if (glm::length(this->velocity) > 0) {

		glm::vec2 future = glm::normalize(this->velocity) * this->range;
		future += this->location;

		float angle = ofRandom(360);
		glm::vec2 target = future + glm::vec2(this->range * 0.5 * cos(angle * DEG_TO_RAD), this->range * 0.5 * sin(angle * DEG_TO_RAD));
		
		glm::vec2 ego = this->seek(target);
		this->applyForce(ego);
	}

	// 境界
	glm::vec2 correction;
	if (this->location.x < this->wall) {

		correction += glm::vec2(max_speed, this->velocity.y);		
	}
	else if(this->location.x > ofGetWidth() - this->wall){

		correction += glm::vec2(-max_speed, this->velocity.y);
	}

	if (this->location.y < this->wall) {

		correction += glm::vec2(this->velocity.x, max_speed);
	}
	else if (this->location.y > ofGetHeight() - this->wall) {

		correction += glm::vec2(this->velocity.x, -max_speed);
	}
	
	if (glm::length(correction) > this->max_force) {

		correction = glm::normalize(correction) * this->max_force;
	}
	this->applyForce(correction);

	// 前進
	this->velocity += this->acceleration;
	if (glm::length(this->velocity) > this->max_speed) {

		this->velocity = glm::normalize(this->velocity) * this->max_speed;
	}
	this->location += this->velocity;
	this->prev_acceleration = this->acceleration;
	this->acceleration *= 0;
	this->velocity *= 0.9;
}

void Particle::draw() {

	ofDrawCircle(this->location, 5);
}

glm::vec2 Particle::separate(vector<unique_ptr<Particle>>& particles) {

	float tmp_range = this->range * 0.5;

	glm::vec2 result;
	glm::vec2 sum;
	int count = 0;
	for (auto& other : particles) {

		glm::vec2 difference = this->location - other->location;
		float len = glm::length(difference);
		if (len > 0 && len < tmp_range) {

			sum += glm::normalize(difference);
			count++;
		}
	}

	if (count > 0) {

		glm::vec2 avg = sum / count;
		avg = avg * this->max_speed;
		if (glm::length(avg) > this->max_speed) {

			avg = glm::normalize(avg) * this->max_speed;
		}
		glm::vec2 steer = avg - this->velocity;
		if (glm::length(steer) > this->max_force) {

			steer = glm::normalize(steer) * this->max_force;
		}
		result = steer;
	}

	return result;
}

glm::vec2 Particle::align(vector<unique_ptr<Particle>>& particles) {

	float tmp_range = this->range;

	glm::vec2 result;
	glm::vec2 sum;
	int count = 0;
	for (auto& other : particles) {

		glm::vec2 difference = this->location - other->location;
		float len = glm::length(difference);
		if (len > 0 && len < tmp_range) {

			sum += other->velocity;
			count++;
		}
	}

	if (count > 0) {

		glm::vec2 avg = sum / count;
		avg = avg * this->max_speed;
		if (glm::length(avg) > this->max_speed) {

			avg = glm::normalize(avg) * this->max_speed;
		}
		glm::vec2 steer = avg - this->velocity;
		if (glm::length(steer) > this->max_force) {

			steer = glm::normalize(steer) * this->max_force;
		}
		result = steer;
	}

	return result;
}

glm::vec2 Particle::cohesion(vector<unique_ptr<Particle>>& particles) {

	float tmp_range = this->range * 0.5;

	glm::vec2 result;
	glm::vec2 sum;
	int count = 0;
	for (auto& other : particles) {

		glm::vec2 difference = this->location - other->location;
		float len = glm::length(difference);
		if (len > 0 && len < tmp_range) {

			sum += other->location;
			count++;
		}
	}

	if (count > 0) {

		result = this->seek(sum / count);
	}

	return result;
}

glm::vec2 Particle::seek(glm::vec2 target) {

	glm::vec2 desired = target - this->location;
	float distance = glm::length(desired);
	desired = glm::normalize(desired);
	desired *= distance < this->range ? ofMap(distance, 0, this->range, 0, this->max_speed) : max_speed;
	glm::vec2 steer = desired - this->velocity;
	if (glm::length(steer) > this->max_force) {

		steer = glm::normalize(steer) * this->max_force;
	}
	return steer;
}

void Particle::applyForce(glm::vec2 force) {

	this->acceleration += force;
}

glm::vec2 Particle::getLocation() {

	return this->location;
}

glm::vec2 Particle::getVelocity() {

	return this->velocity;
}

glm::vec2 Particle::getAcceleration() {

	return this->prev_acceleration;
}

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#include "Particle.h"

Particle::Particle() {

this->location = glm::vec2(ofRandom(ofGetWidth()), ofRandom(ofGetHeight()));

this->velocity = glm::vec2(ofRandom(-1, 1), ofRandom(-1, 1));

this->range = 40;

this->max_force = 1;

this->max_speed = 8;

this->wall = 20;

}

Particle::~Particle() {

}

void Particle::update(vector<unique_ptr<Particle>>& particles) {

// 分離

glm::vec2 separate = this->separate(particles);

this->applyForce(separate);

// 整列

glm::vec2 align = this->align(particles);

this->applyForce(align);

// 結合

glm::vec2 cohesion = this->cohesion(particles);

this->applyForce(cohesion);

// 自我

if (glm::length(this->velocity) > 0) {

glm::vec2 future = glm::normalize(this->velocity) * this->range;

future += this->location;

float angle = ofRandom(360);

glm::vec2 target = future + glm::vec2(this->range * 0.5 * cos(angle * DEG_TO_RAD), this->range * 0.5 * sin(angle * DEG_TO_RAD));

glm::vec2 ego = this->seek(target);

this->applyForce(ego);

}

// 境界

glm::vec2 correction;

if (this->location.x < this->wall) {

correction += glm::vec2(max_speed, this->velocity.y);

}

else if(this->location.x > ofGetWidth() - this->wall){

correction += glm::vec2(-max_speed, this->velocity.y);

}

if (this->location.y < this->wall) {

correction += glm::vec2(this->velocity.x, max_speed);

}

else if (this->location.y > ofGetHeight() - this->wall) {

correction += glm::vec2(this->velocity.x, -max_speed);

}

if (glm::length(correction) > this->max_force) {

correction = glm::normalize(correction) * this->max_force;

}

this->applyForce(correction);

// 前進

this->velocity += this->acceleration;

if (glm::length(this->velocity) > this->max_speed) {

this->velocity = glm::normalize(this->velocity) * this->max_speed;

}

this->location += this->velocity;

this->prev_acceleration = this->acceleration;

this->acceleration *= 0;

this->velocity *= 0.9;

}

void Particle::draw() {

ofDrawCircle(this->location, 5);

}

glm::vec2 Particle::separate(vector<unique_ptr<Particle>>& particles) {

float tmp_range = this->range * 0.5;

glm::vec2 result;

glm::vec2 sum;

int count = 0;

for (auto& other : particles) {

glm::vec2 difference = this->location - other->location;

float len = glm::length(difference);

if (len > 0 && len < tmp_range) {

sum += glm::normalize(difference);

count++;

}

if (count > 0) {

glm::vec2 avg = sum / count;

avg = avg * this->max_speed;

if (glm::length(avg) > this->max_speed) {

avg = glm::normalize(avg) * this->max_speed;

}

glm::vec2 steer = avg - this->velocity;

if (glm::length(steer) > this->max_force) {

steer = glm::normalize(steer) * this->max_force;

}

result = steer;

}

return result;

}

glm::vec2 Particle::align(vector<unique_ptr<Particle>>& particles) {

float tmp_range = this->range;

glm::vec2 result;

glm::vec2 sum;

int count = 0;

for (auto& other : particles) {

glm::vec2 difference = this->location - other->location;

float len = glm::length(difference);

if (len > 0 && len < tmp_range) {

sum += other->velocity;

count++;

}

if (count > 0) {

glm::vec2 avg = sum / count;

avg = avg * this->max_speed;

if (glm::length(avg) > this->max_speed) {

avg = glm::normalize(avg) * this->max_speed;

}

glm::vec2 steer = avg - this->velocity;

if (glm::length(steer) > this->max_force) {

steer = glm::normalize(steer) * this->max_force;

}

result = steer;

}

return result;

}

glm::vec2 Particle::cohesion(vector<unique_ptr<Particle>>& particles) {

float tmp_range = this->range * 0.5;

glm::vec2 result;

glm::vec2 sum;

int count = 0;

for (auto& other : particles) {

glm::vec2 difference = this->location - other->location;

float len = glm::length(difference);

if (len > 0 && len < tmp_range) {

sum += other->location;

count++;

}

if (count > 0) {

result = this->seek(sum / count);

}

return result;

}

glm::vec2 Particle::seek(glm::vec2 target) {

glm::vec2 desired = target - this->location;

float distance = glm::length(desired);

desired = glm::normalize(desired);

desired *= distance < this->range ? ofMap(distance, 0, this->range, 0, this->max_speed) : max_speed;

glm::vec2 steer = desired - this->velocity;

if (glm::length(steer) > this->max_force) {

steer = glm::normalize(steer) * this->max_force;

}

return steer;

}

void Particle::applyForce(glm::vec2 force) {

this->acceleration += force;

}

glm::vec2 Particle::getLocation() {

return this->location;

}

glm::vec2 Particle::getVelocity() {

return this->velocity;

}

glm::vec2 Particle::getAcceleration() {

return this->prev_acceleration;

}

#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 = 50;

uniform float time;
uniform vec2 resolution;
uniform vec2 targets[number_of_targets];
uniform float force[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 r = 0.02 / length(p - t) * 1.0 * force[i];
    float g = 0.02 / length(p - t) * 1.0 * force[i];
    float b = 0.02 / length(p - t) * 0.75;
    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 = 50;

uniform float time;

uniform vec2 resolution;

uniform vec2 targets[number_of_targets];

uniform float force[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 r = 0.02 / length(p - t) * 1.0 * force[i];

float g = 0.02 / length(p - t) * 1.0 * force[i];

float b = 0.02 / length(p - t) * 0.75;

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/Insta20181219

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2018年11月25日

Screwdriver. openFrameworks

[ Video ]

[ About ]
Day 25 Screwdriver

スクリュードライバー(ウォッカ＋オレンジ）を買ってきて「酔っちゃった」とするつもりが、3件酒屋をハシゴするも取り扱いがなく、本家・スクリュードライバーの画像で「酔っちゃった」をしなければならなくなった図

[ 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) {};

	ofImage image;
	vector<glm::vec3> y_noise;

	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) {};

ofImage image;

vector<glm::vec3> y_noise;

ofShader shader;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);

	this->image.load("image/drivers.jpg");

	for (int i = 0; i < ofGetHeight(); i++)
	{
		this->y_noise.push_back(glm::vec3(0.f, 0.f, 0.f));
	}

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

	glm::vec3 noise_value;
	for (int y = 0; y < this->y_noise.size(); y++) {

		for (int i = 0; i < 3; i++) {

			noise_value[i] = ofMap(ofNoise(i, y * 0.005 + ofGetFrameNum() * 0.01), 0, 1, -1, 1);

		}
		this->y_noise[y] = noise_value;
	}
}

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

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex", this->image, 1);
	this->shader.setUniform3fv("y_noise", &this->y_noise[0].x, ofGetHeight());

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

	this->shader.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetColor(39);

this->image.load("image/drivers.jpg");

for (int i = 0; i < ofGetHeight(); i++)

{

this->y_noise.push_back(glm::vec3(0.f, 0.f, 0.f));

}

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

}

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

void ofApp::update() {

glm::vec3 noise_value;

for (int y = 0; y < this->y_noise.size(); y++) {

for (int i = 0; i < 3; i++) {

noise_value[i] = ofMap(ofNoise(i, y * 0.005 + ofGetFrameNum() * 0.01), 0, 1, -1, 1);

}

this->y_noise[y] = noise_value;

}

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

void ofApp::draw() {

this->shader.begin();

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

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

this->shader.setUniformTexture("tex", this->image, 1);

this->shader.setUniform3fv("y_noise", &this->y_noise[0].x, ofGetHeight());

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

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex;
uniform vec3 y_noise[720];

out vec4 outputColor;

void main() {

  float drift = 50.0;
  float r = texture(tex, vec2(gl_FragCoord.x + drift * y_noise[int(gl_FragCoord.y)].r, (resolution.y - gl_FragCoord.y))).r;
  float g = texture(tex, vec2(gl_FragCoord.x + drift * y_noise[int(gl_FragCoord.y)].g, (resolution.y - gl_FragCoord.y))).g;
  float b = texture(tex, vec2(gl_FragCoord.x + drift * y_noise[int(gl_FragCoord.y)].b, (resolution.y - gl_FragCoord.y))).b;
  outputColor = vec4(r, g, b, 1.0);
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex;

uniform vec3 y_noise[720];

out vec4 outputColor;

void main() {

float drift = 50.0;

float r = texture(tex, vec2(gl_FragCoord.x + drift * y_noise[int(gl_FragCoord.y)].r, (resolution.y - gl_FragCoord.y))).r;

float g = texture(tex, vec2(gl_FragCoord.x + drift * y_noise[int(gl_FragCoord.y)].g, (resolution.y - gl_FragCoord.y))).g;

float b = texture(tex, vec2(gl_FragCoord.x + drift * y_noise[int(gl_FragCoord.y)].b, (resolution.y - gl_FragCoord.y))).b;

outputColor = vec4(r, g, b, 1.0);

}

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2018年11月13日2018年11月13日

Black Hole. openFrameworks

[ Video ]

[ About ]
Day 13 Black Hole

openFrameworksで座標計算、GLSLで光球描写のパターン

openFframeworks is computing coordinate, GLSL is drawing light sphere.

[ 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_location;
	vector<ofPoint> locations;
	vector<float> velocity;

	ofFbo src;
	ofFbo dst;
	ofShader shader;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

int number_of_location;

vector<ofPoint> locations;

vector<float> velocity;

ofFbo src;

ofFbo dst;

ofShader shader;

};

#include "ofApp.h"

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

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

	ofBackground(0);

	this->number_of_location = 200;
	for (int i = 0; i < this->number_of_location; i++) {

		ofPoint point = ofPoint(ofRandom(-ofGetWidth(), ofGetWidth()), ofRandom(-ofGetHeight(), ofGetHeight()));
		
		this->locations.push_back(point);
		this->velocity.push_back(1.f);
	}

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

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

		float len = this->locations[i].length();
		if (len < 100) {

			ofPoint point;
			while (point.length() < 100) {

				point = ofPoint(ofRandom(-ofGetWidth(), ofGetWidth()), ofRandom(-ofGetHeight(), ofGetHeight()));
			}
		
			this->locations[i] = point;
			this->velocity[i] = 1.f;
		}
		else {

			this->locations[i] = this->locations[i].normalized() * (len * this->velocity[i]);
			this->velocity[i] *= 0.999f;
		}
	}
}

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

	vector<glm::vec2> targets;
	for (int i = 0; i < this->number_of_location; i++) {

		glm::vec2 target = glm::vec2(this->locations[i].x + ofGetWidth() * 0.5, this->locations[i].y + ofGetHeight() * 0.5);
		targets.push_back(target);
	}

	this->dst.begin();

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniform2fv("targets", &targets[0].x, this->number_of_location);
	this->shader.setUniformTexture("fbo", this->src.getTexture(), 1);

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

	this->shader.end();
	this->dst.end();

	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(60);

ofSetWindowTitle("openframeworks");

ofBackground(0);

this->number_of_location = 200;

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

ofPoint point = ofPoint(ofRandom(-ofGetWidth(), ofGetWidth()), ofRandom(-ofGetHeight(), ofGetHeight()));

this->locations.push_back(point);

this->velocity.push_back(1.f);

}

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

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

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

}

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

void ofApp::update() {

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

float len = this->locations[i].length();

if (len < 100) {

ofPoint point;

while (point.length() < 100) {

point = ofPoint(ofRandom(-ofGetWidth(), ofGetWidth()), ofRandom(-ofGetHeight(), ofGetHeight()));

}

this->locations[i] = point;

this->velocity[i] = 1.f;

}

else {

this->locations[i] = this->locations[i].normalized() * (len * this->velocity[i]);

this->velocity[i] *= 0.999f;

}

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

void ofApp::draw() {

vector<glm::vec2> targets;

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

glm::vec2 target = glm::vec2(this->locations[i].x + ofGetWidth() * 0.5, this->locations[i].y + ofGetHeight() * 0.5);

targets.push_back(target);

}

this->dst.begin();

this->shader.begin();

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

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

this->shader.setUniform2fv("targets", &targets[0].x, this->number_of_location);

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

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

this->shader.end();

this->dst.end();

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;

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 = 200;

uniform float time;
uniform vec2 resolution;
uniform vec2 targets[number_of_targets];
uniform sampler2DRect fbo;

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);
    vec3 c = vec3(smoothstep(0.01, 1.0, v));
    color += c;
  }

  vec4 fbo_value = texture(fbo, vec2(gl_FragCoord.x, gl_FragCoord.y));
  outputColor = vec4(color, 1.0) + fbo_value * 0.85;
}

#version 150

const int number_of_targets = 200;

uniform float time;

uniform vec2 resolution;

uniform vec2 targets[number_of_targets];

uniform sampler2DRect fbo;

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);

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

color += c;

}

vec4 fbo_value = texture(fbo, vec2(gl_FragCoord.x, gl_FragCoord.y));

outputColor = vec4(color, 1.0) + fbo_value * 0.85;

}

[ Link ]
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