プログラミング de 落描き – ページ 827 – クリエイティブ・コーディングによる生成物とソース

2019年1月27日2019年2月7日

Torus knot. openFrameworks

[ Video ]

[ About ]
「数学デッサン教室描いて楽しむ数学のかたち」という本に記載のある数式を元にトーラス結び目(7, 2)をopenFrameworksで描写しました

Torus knot.

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

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

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

	void draw_torus(float R, float r, float p, float q);
	glm::vec3 make_point(float R, float r, float t, float p, float q);

	ofEasyCam cam;
};

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

void draw_torus(float R, float r, float p, float q);

glm::vec3 make_point(float R, float r, float t, float p, float q);

ofEasyCam cam;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetLineWidth(5);
	ofEnableDepthTest();
}

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

}

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

	this->cam.begin();

	this->draw_torus(200, 60, 7, 2);

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::draw_torus(float R, float r, float p, float q) {

	ofColor color;
	for (int t_start = ofGetFrameNum() * 0.75; t_start < ofGetFrameNum() * 0.75 + 360; t_start += 30) {

		ofSetColor(39);
		for (int t = t_start; t <= t_start + 20; t++) {

			ofDrawLine(this->make_point(R, r, t, p, q), this->make_point(R, r, t + 1, p, q));
		}

		color.setHsb(ofMap(t_start % 360, 0, 360, 0, 255), 255, 255);
		ofSetColor(color);

		ofDrawSphere(this->make_point(R, r, t_start + 25, p, q), 10);
	}
}

//--------------------------------------------------------------
glm::vec3 ofApp::make_point(float R, float r, float t, float p, float q) {

	// 数学デッサン教室 描いて楽しむ数学たち　P.39
	float x = (R + r * cos(p * t * DEG_TO_RAD)) * cos(q * t * DEG_TO_RAD);
	float y = (R + r * cos(p * t * DEG_TO_RAD)) * sin(q * t * DEG_TO_RAD);
	float z = r * sin(p * t * DEG_TO_RAD);

	return glm::vec3(x, y, z);
}
//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetLineWidth(5);

ofEnableDepthTest();

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

this->draw_torus(200, 60, 7, 2);

this->cam.end();

}

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

void ofApp::draw_torus(float R, float r, float p, float q) {

ofColor color;

for (int t_start = ofGetFrameNum() * 0.75; t_start < ofGetFrameNum() * 0.75 + 360; t_start += 30) {

ofSetColor(39);

for (int t = t_start; t <= t_start + 20; t++) {

ofDrawLine(this->make_point(R, r, t, p, q), this->make_point(R, r, t + 1, p, q));

}

color.setHsb(ofMap(t_start % 360, 0, 360, 0, 255), 255, 255);

ofSetColor(color);

ofDrawSphere(this->make_point(R, r, t_start + 25, p, q), 10);

}

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

glm::vec3 ofApp::make_point(float R, float r, float t, float p, float q) {

// 数学デッサン教室描いて楽しむ数学たち　P.39

float x = (R + r * cos(p * t * DEG_TO_RAD)) * cos(q * t * DEG_TO_RAD);

float y = (R + r * cos(p * t * DEG_TO_RAD)) * sin(q * t * DEG_TO_RAD);

float z = r * sin(p * t * DEG_TO_RAD);

return glm::vec3(x, y, z);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20190127

2019年1月26日

Particle Systems. Proessing

[ Video ]

[ About ]
Processing部という勉強会グループで作成した課題

Particle System.

[ Source ]

ParticleSystem particleSystemR;
ParticleSystem particleSystemG;
ParticleSystem particleSystemB;

void setup()
{
  size(500, 500);

  particleSystemR = new ParticleSystem(new PVector(50, 50), new PVector(150, 150), color(255, 0, 0));
  particleSystemG = new ParticleSystem(new PVector(0, 250), new PVector(250, 250), color(0, 255, 0));
  particleSystemB = new ParticleSystem(new PVector(250, 0), new PVector(250, 500), color(0, 128, 255));
}

void draw()
{
  background(39);
  
  particleSystemR.run();
  particleSystemG.run();
  particleSystemB.run();
}

ParticleSystem particleSystemR;

ParticleSystem particleSystemG;

ParticleSystem particleSystemB;

void setup()

{

size(500, 500);

particleSystemR = new ParticleSystem(new PVector(50, 50), new PVector(150, 150), color(255, 0, 0));

particleSystemG = new ParticleSystem(new PVector(0, 250), new PVector(250, 250), color(0, 255, 0));

particleSystemB = new ParticleSystem(new PVector(250, 0), new PVector(250, 500), color(0, 128, 255));

}

void draw()

{

background(39);

particleSystemR.run();

particleSystemG.run();

particleSystemB.run();

}

class Particle
{
  PVector position;
  PVector velocity;
  color myColor;
  
  Particle(PVector position, color myColor)
  {
    this.position = position;
    this.velocity = new PVector(random(-1, 1), random(-1, 1));
    this.velocity = this.velocity.normalize().mult(random(3, 5));   
    this.myColor = myColor;
  }
  
  void update(PVector origin, PVector size)
  {    
    if(this.position.x < origin.x) { this.velocity.x *= -1; }
    if(this.position.x > origin.x + size.x) { this.velocity.x *= -1; }    
    if(this.position.y < origin.y) { this.velocity.y *= -1; }
    if(this.position.y > origin.y + size.y) { this.velocity.y *= -1; }
    
    this.position.add(this.velocity); 
  }
  
  void display()
  {
    stroke(239);
    fill(this.myColor);
    ellipse(this.position.x, this.position.y, 15, 15);
  }
}

class Particle

{

PVector position;

PVector velocity;

color myColor;

Particle(PVector position, color myColor)

{

this.position = position;

this.velocity = new PVector(random(-1, 1), random(-1, 1));

this.velocity = this.velocity.normalize().mult(random(3, 5));

this.myColor = myColor;

}

void update(PVector origin, PVector size)

{

if(this.position.x < origin.x) { this.velocity.x *= -1; }

if(this.position.x > origin.x + size.x) { this.velocity.x *= -1; }

if(this.position.y < origin.y) { this.velocity.y *= -1; }

if(this.position.y > origin.y + size.y) { this.velocity.y *= -1; }

this.position.add(this.velocity);

}

void display()

{

stroke(239);

fill(this.myColor);

ellipse(this.position.x, this.position.y, 15, 15);

}

class ParticleSystem
{
  ArrayList<Particle> particles;
  PVector position;
  PVector size;
  
  ParticleSystem(PVector position, PVector size, color particleColor)
  {
    this.position = position;
    this.size = size;
    this.particles = new ArrayList<Particle>();
    for(int i = 0; i < 15; i++)
    {
      PVector particlePosition = new PVector(random(position.x, position.x + size.x), random(position.y, position.y + size.y));      
      Particle particle = new Particle(particlePosition, particleColor);
      this.particles.add(particle);
    }
  }
  
  void run()
  {
    for(Particle particle : this.particles)
    {
      particle.update(this.position, this.size);
      particle.display();
    }
    
    stroke(255);
    noFill();
    rect(this.position.x, this.position.y, this.size.x, this.size.y);
  }
}

class ParticleSystem

{

ArrayList<Particle> particles;

PVector position;

PVector size;

ParticleSystem(PVector position, PVector size, color particleColor)

{

this.position = position;

this.size = size;

this.particles = new ArrayList<Particle>();

for(int i = 0; i < 15; i++)

{

PVector particlePosition = new PVector(random(position.x, position.x + size.x), random(position.y, position.y + size.y));

Particle particle = new Particle(particlePosition, particleColor);

this.particles.add(particle);

}

void run()

{

for(Particle particle : this.particles)

{

particle.update(this.position, this.size);

particle.display();

}

stroke(255);

noFill();

rect(this.position.x, this.position.y, this.size.x, this.size.y);

}

[ Link ]

2019年1月25日2019年1月25日

Split circles. openFrameworks

[ Video ]

[ About ]
ノイズ関数を使って円を分割

Split circles from Perlin Noise.

[ Source ]

#pragma once
#include "ofMain.h"

class ofApp : public ofBaseApp {

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

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

#pragma once

#include "ofMain.h"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

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

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

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

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);
	ofNoFill();
	ofSetLineWidth(2);
}

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

	ofSeedRandom(39);
}

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

	int span = 144;
	for (int x = span * 0.5; x < ofGetWidth(); x += span) {

		for (int y = span * 0.5; y < ofGetHeight(); y += span) {

			ofPushMatrix();
			ofTranslate(x, y);
			ofRotateDeg(ofRandom(360));

			int radius = 60;
			int deg_span = 1;
			float noise_seed = ofRandom(1000);
			vector<int> degs;
			for (int deg = 0; deg < 180; deg += deg_span) {

				float noise_value = ofNoise((noise_seed + deg) * 0.04, ofGetFrameNum() * 0.01);
				if (noise_value > 0.4) {

					degs.push_back(deg);
				}
				else {

					if (degs.size() > 0) {

						vector<ofPoint> vertices;
						for (int i = 0; i < degs.size(); i++) {

							vertices.push_back(ofPoint(radius * cos(degs[i] * DEG_TO_RAD), radius * sin(degs[i] * DEG_TO_RAD)));
						}

						for (int i = degs.size() - 1; i >= 0; i--) {

							vertices.push_back(ofPoint(radius * cos((360 - degs[i]) * DEG_TO_RAD), radius * sin((360 - degs[i]) * DEG_TO_RAD)));
						}

						ofBeginShape();
						ofVertices(vertices);
						ofEndShape(true);

						degs.clear();
					}
				}
			}

			ofPopMatrix();
		}
	}
}

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

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(39);

ofNoFill();

ofSetLineWidth(2);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

int span = 144;

for (int x = span * 0.5; x < ofGetWidth(); x += span) {

for (int y = span * 0.5; y < ofGetHeight(); y += span) {

ofPushMatrix();

ofTranslate(x, y);

ofRotateDeg(ofRandom(360));

int radius = 60;

int deg_span = 1;

float noise_seed = ofRandom(1000);

vector<int> degs;

for (int deg = 0; deg < 180; deg += deg_span) {

float noise_value = ofNoise((noise_seed + deg) * 0.04, ofGetFrameNum() * 0.01);

if (noise_value > 0.4) {

degs.push_back(deg);

}

else {

if (degs.size() > 0) {

vector<ofPoint> vertices;

for (int i = 0; i < degs.size(); i++) {

vertices.push_back(ofPoint(radius * cos(degs[i] * DEG_TO_RAD), radius * sin(degs[i] * DEG_TO_RAD)));

}

for (int i = degs.size() - 1; i >= 0; i--) {

vertices.push_back(ofPoint(radius * cos((360 - degs[i]) * DEG_TO_RAD), radius * sin((360 - degs[i]) * DEG_TO_RAD)));

}

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

degs.clear();

}

ofPopMatrix();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20190125

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