プログラミング de 落描き – ページ 834 – クリエイティブ・コーディングによる生成物とソース

2018年4月28日2018年4月27日

無邪気な夢 openFrameworks

[ Video ]

[ About ]
最近購入した書籍「Make Your Own Algorithmic Art」で紹介されていたコードを参考にしてみました。

Innocent Dreams
Rashid, Tariq. Make Your Own Algorithmic Art （ページ575). . Kindle 版.

こちらの本はopenProcessing(p5js)を使って書かれています。英語が読めないので、雰囲気で読んだ感想ですが、図解も多く、内容もステップアップで進み、解説もかなり丁寧です。結構、お勧めの書籍です。

[ 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) {};

	float alpha;
	vector<int> seed_values;
	void draw_circles(ofPoint range_point, int number_of_circles, int seed_value);
};

#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) {};

float alpha;

vector<int> seed_values;

void draw_circles(ofPoint range_point, int number_of_circles, int seed_value);

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofBackground(239);
	ofSetWindowTitle("Insta");

	this->alpha = 255;
	this->seed_values = { 0, 0, 0, 0 };
}

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

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

	// サイクル(増加、停止、フェードアウト)管理
	int number_of_circles = ofGetFrameNum() % 450;
	if (number_of_circles > 400) {
		
		this->alpha = ofMap(number_of_circles, 400, 450, 255, 0);
		number_of_circles = 350;
	}
	else if (number_of_circles > 350) {

		number_of_circles = 350;
	}else{

		this->alpha = 255;
	}
	
	//　サイクルが1周したらリセット
	if (number_of_circles == 0) {

		this->seed_values[0] = ofRandom(10, 30);
		this->seed_values[1] = ofRandom(50, 80);
		this->seed_values[2] = ofRandom(100, 130);
		this->seed_values[3] = ofRandom(150, 180);
		return;
	}

	// 4カ所に描写
	this->draw_circles(ofPoint(ofGetWidth() / 4, ofGetHeight() / 4), number_of_circles, this->seed_values[0]);
	this->draw_circles(ofPoint(ofGetWidth() / 4, ofGetHeight() / 4 * 3), number_of_circles, this->seed_values[1]);
	this->draw_circles(ofPoint(ofGetWidth() / 4 * 3, ofGetHeight() / 4), number_of_circles, this->seed_values[2]);
	this->draw_circles(ofPoint(ofGetWidth() / 4 * 3, ofGetHeight() / 4 * 3), number_of_circles, this->seed_values[3]);
}

//--------------------------------------------------------------
void ofApp::draw_circles(ofPoint range_point, int number_of_circles, int seed_value) {

	ofSeedRandom(seed_value);

	ofPushMatrix();
	ofTranslate(range_point);

	vector<tuple<ofColor, ofPoint, float>> circles;
	int range_radius = 150;

	// 重ならないCircleをnumber_of_circles数だけ生成
	while (circles.size() < number_of_circles) {

		ofPoint point = ofPoint(ofRandom(-range_radius, range_radius), ofRandom(-range_radius, range_radius));
		if (point.length() > range_radius) {

			continue;
		}

		ofColor color;
		color.setHsb(ofRandom(seed_value - 10, seed_value + 10), ofRandom(139, 239), ofRandom(139, 239));
		float radius = ofRandom(2, 35);

		bool flag = true;
		for (int i = 0; i < circles.size(); i++) {

			if (point.distance(get<1>(circles[i])) < get<2>(circles[i]) + radius) {

				flag = false;
				break;
			}
		}

		if (flag) {

			circles.push_back(make_tuple(color, point, radius));
		}
	}

	// 生成したCircleの描写
	for (int circles_index = 0; circles_index < circles.size(); circles_index++) {

		ofColor color = get<0>(circles[circles_index]);
		ofPoint point = get<1>(circles[circles_index]);
		float radius = get<2>(circles[circles_index]);

		ofSetColor(color, this->alpha);
		ofDrawCircle(point, radius);
	}

	ofPopMatrix();
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(239);

ofSetWindowTitle("Insta");

this->alpha = 255;

this->seed_values = { 0, 0, 0, 0 };

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

// サイクル(増加、停止、フェードアウト)管理

int number_of_circles = ofGetFrameNum() % 450;

if (number_of_circles > 400) {

this->alpha = ofMap(number_of_circles, 400, 450, 255, 0);

number_of_circles = 350;

}

else if (number_of_circles > 350) {

number_of_circles = 350;

}else{

this->alpha = 255;

}

//　サイクルが1周したらリセット

if (number_of_circles == 0) {

this->seed_values[0] = ofRandom(10, 30);

this->seed_values[1] = ofRandom(50, 80);

this->seed_values[2] = ofRandom(100, 130);

this->seed_values[3] = ofRandom(150, 180);

return;

}

// 4カ所に描写

this->draw_circles(ofPoint(ofGetWidth() / 4, ofGetHeight() / 4), number_of_circles, this->seed_values[0]);

this->draw_circles(ofPoint(ofGetWidth() / 4, ofGetHeight() / 4 * 3), number_of_circles, this->seed_values[1]);

this->draw_circles(ofPoint(ofGetWidth() / 4 * 3, ofGetHeight() / 4), number_of_circles, this->seed_values[2]);

this->draw_circles(ofPoint(ofGetWidth() / 4 * 3, ofGetHeight() / 4 * 3), number_of_circles, this->seed_values[3]);

}

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

void ofApp::draw_circles(ofPoint range_point, int number_of_circles, int seed_value) {

ofSeedRandom(seed_value);

ofPushMatrix();

ofTranslate(range_point);

vector<tuple<ofColor, ofPoint, float>> circles;

int range_radius = 150;

// 重ならないCircleをnumber_of_circles数だけ生成

while (circles.size() < number_of_circles) {

ofPoint point = ofPoint(ofRandom(-range_radius, range_radius), ofRandom(-range_radius, range_radius));

if (point.length() > range_radius) {

continue;

}

ofColor color;

color.setHsb(ofRandom(seed_value - 10, seed_value + 10), ofRandom(139, 239), ofRandom(139, 239));

float radius = ofRandom(2, 35);

bool flag = true;

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

if (point.distance(get<1>(circles[i])) < get<2>(circles[i]) + radius) {

flag = false;

break;

}

if (flag) {

circles.push_back(make_tuple(color, point, radius));

}

// 生成したCircleの描写

for (int circles_index = 0; circles_index < circles.size(); circles_index++) {

ofColor color = get<0>(circles[circles_index]);

ofPoint point = get<1>(circles[circles_index]);

float radius = get<2>(circles[circles_index]);

ofSetColor(color, this->alpha);

ofDrawCircle(point, radius);

}

ofPopMatrix();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180427

2018年4月27日2018年4月26日

ずれるヘキサゴン openFrameworks

[ Video ]

[ About ]
六角形を重ねて描写しています。

高さ+Frame番号を引数としたNoiseで座標をズラしているので、ずれが伝播して昇っていくようなっています。

また、全部を同じ色で描写すると、奥行が感じられないので、前後の深さと線のアルファが連動させてそれっぽくしています。

[ 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) {};

	ofEasyCam cam;
	void draw_hexagon(ofPoint center, float radius, float z = 0.f);
};

#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) {};

ofEasyCam cam;

void draw_hexagon(ofPoint center, float radius, float z = 0.f);

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofBackground(39);
	ofSetWindowTitle("Insta");

	ofSetLineWidth(2);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
}

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

	ofSeedRandom(39);
}

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

	this->cam.begin();
	ofRotateX(270);
	ofRotateZ(35);

	float noise_x_param = ofRandom(1000);
	float noise_y_param = ofRandom(1000);
	float noise_threshold_high = 0.65;
	float noise_threshold_low = 0.35;
	for (int z = -300; z <= 300; z += 10) {

		ofPushMatrix();
		
		float noise_x_value = ofNoise(noise_x_param + z * 0.005 - ofGetFrameNum() * 0.05);
		float noise_y_value = ofNoise(noise_y_param + z * 0.005 - ofGetFrameNum() * 0.05);

		if (noise_x_value > noise_threshold_high) {

			ofTranslate(ofMap(noise_x_value, noise_threshold_high, 1.0, 0, 500), 0);
		}
		else if (noise_x_value < noise_threshold_low) {

			ofTranslate(ofMap(noise_x_value, 0.0, noise_threshold_low, -500, 0), 0);
		}

		if (noise_y_value > noise_threshold_high) {

			ofTranslate(0, ofMap(noise_y_value, noise_threshold_high, 1.0, 0, 500));
		}
		else if (noise_y_value < noise_threshold_low) {

			ofTranslate(0, ofMap(noise_y_value, 0.0, noise_threshold_low, -500, 0));
		}

		this->draw_hexagon(ofPoint(), 300, z);

		ofPopMatrix();
	}

	this->cam.end();
}

//--------------------------------------------------------------
void ofApp::draw_hexagon(ofPoint center, float radius, float z) {

	for (int deg = 0; deg < 360; deg += 60) {

		ofPoint start = ofPoint(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), z);
		ofPoint end = ofPoint(radius * cos((deg + 60) * DEG_TO_RAD), radius * sin((deg + 60) * DEG_TO_RAD), z);
		ofPoint distance = end - start;
		float len = distance.length();
		distance.normalize();

		for (int l = 0; l < len; l++) {

			ofPoint p1 = start + l * distance;
			ofPoint p2 = start + (l + 1) * distance;

			ofSetColor(239, ofMap(p1.y, -radius, radius, 255, 25));
			ofDrawLine(p1, p2);
		}
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(39);

ofSetWindowTitle("Insta");

ofSetLineWidth(2);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(270);

ofRotateZ(35);

float noise_x_param = ofRandom(1000);

float noise_y_param = ofRandom(1000);

float noise_threshold_high = 0.65;

float noise_threshold_low = 0.35;

for (int z = -300; z <= 300; z += 10) {

ofPushMatrix();

float noise_x_value = ofNoise(noise_x_param + z * 0.005 - ofGetFrameNum() * 0.05);

float noise_y_value = ofNoise(noise_y_param + z * 0.005 - ofGetFrameNum() * 0.05);

if (noise_x_value > noise_threshold_high) {

ofTranslate(ofMap(noise_x_value, noise_threshold_high, 1.0, 0, 500), 0);

}

else if (noise_x_value < noise_threshold_low) {

ofTranslate(ofMap(noise_x_value, 0.0, noise_threshold_low, -500, 0), 0);

}

if (noise_y_value > noise_threshold_high) {

ofTranslate(0, ofMap(noise_y_value, noise_threshold_high, 1.0, 0, 500));

}

else if (noise_y_value < noise_threshold_low) {

ofTranslate(0, ofMap(noise_y_value, 0.0, noise_threshold_low, -500, 0));

}

this->draw_hexagon(ofPoint(), 300, z);

ofPopMatrix();

}

this->cam.end();

}

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

void ofApp::draw_hexagon(ofPoint center, float radius, float z) {

for (int deg = 0; deg < 360; deg += 60) {

ofPoint start = ofPoint(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), z);

ofPoint end = ofPoint(radius * cos((deg + 60) * DEG_TO_RAD), radius * sin((deg + 60) * DEG_TO_RAD), z);

ofPoint distance = end - start;

float len = distance.length();

distance.normalize();

for (int l = 0; l < len; l++) {

ofPoint p1 = start + l * distance;

ofPoint p2 = start + (l + 1) * distance;

ofSetColor(239, ofMap(p1.y, -radius, radius, 255, 25));

ofDrawLine(p1, p2);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180426

2018年4月26日2018年4月25日

陽炎 openFrameworks

[ Video ]

[ About ]
X軸に平行な線を等間隔に描写していきます。

ただし、下記の二つのフールを追加しています。
1. Y座標 + Frame数を引数としたNoise関数の結果により線のX座標がずれる
2. 中心座標からの距離が一定以内の場合は描写しない

割と、はっきり円の輪郭が見えてくるのが個人的にツボです。

[ 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);
	ofBackground(239);
	ofSetWindowTitle("Insta");

	ofSetColor(39);
	ofSetLineWidth(2);
}

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

}

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

	ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2);

	int radius = 250;
	int line_length = 380;
	for (int y = -ofGetHeight() / 2; y <= ofGetHeight() / 2; y += 5) {

		int x_start = ofNoise(y * 0.02 + ofGetFrameNum() * 0.01) * -line_length;
		for (int x = x_start; x <= x_start + line_length; x += 1) {

			if (ofPoint(x, y).length() > radius) {

				ofDrawLine(ofPoint(x, y), ofPoint(x + 1, y));
			}
		}
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(239);

ofSetWindowTitle("Insta");

ofSetColor(39);

ofSetLineWidth(2);

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2);

int radius = 250;

int line_length = 380;

for (int y = -ofGetHeight() / 2; y <= ofGetHeight() / 2; y += 5) {

int x_start = ofNoise(y * 0.02 + ofGetFrameNum() * 0.01) * -line_length;

for (int x = x_start; x <= x_start + line_length; x += 1) {

if (ofPoint(x, y).length() > radius) {

ofDrawLine(ofPoint(x, y), ofPoint(x + 1, y));

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180425

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