circle – ページ 128 – プログラミング de 落描き

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

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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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2018年4月24日2018年4月23日

2つのトーラス openFrameworks

[ Video ]

[ About ]
トーラスの中を3色のSphereが巡回していて、Sphere周辺の辺だけがその色で描写されています。一つだけだと寂しかったので、二つ重ねてみました。

[ 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;
	ofPoint make_point(float radius, float small_radius, float deg, float small_deg);
};

#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;

ofPoint make_point(float radius, float small_radius, float deg, float small_deg);

};

#include "ofApp.h"

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

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

	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
	ofSetLineWidth(1.5);
}

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

}

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

	this->cam.begin();

	float radius = 300;
	vector<ofColor> colors = {ofColor(239, 39, 39), ofColor(39, 239, 39), ofColor(39, 39, 239)};
	for (int loop = 0; loop < 2; loop++) {

		ofRotateX(loop * 90);
		for (int i = 0; i < colors.size(); i++) {

			float sphere_deg = (360 / colors.size()) * i + ofGetFrameNum();

			ofPoint sphere_point = ofPoint(radius * cos(sphere_deg * DEG_TO_RAD), radius * sin(sphere_deg * DEG_TO_RAD));
			ofFill();
			ofSetColor(colors[i]);
			ofDrawSphere(sphere_point, 5);

			int deg_span = 5;
			for (int deg = 0; deg < 360; deg += deg_span) {

				int small_deg_span = 5;
				float small_radius = 80;
				vector<ofPoint> vertices;
				for (int small_deg = 0; small_deg < 360; small_deg += small_deg_span) {

					ofPoint point = make_point(radius, small_radius, deg, small_deg);
					float distance = sphere_point.distance(point);
					ofSetColor(colors[i], ofMap(distance, 0, 250, 255, 0));
					if (distance < 250) {

						vertices.push_back(point);

						ofPoint next_point = make_point(radius, small_radius, deg + deg_span, small_deg);
						ofDrawLine(point, next_point);
					}
				}

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

	this->cam.end();
}

//--------------------------------------------------------------
ofPoint ofApp::make_point(float radius, float small_radius, float deg, float small_deg) {

	float x_1 = radius * cos(deg * DEG_TO_RAD);
	float y_1 = radius * sin(deg * DEG_TO_RAD);

	float x_2 = small_radius * cos(small_deg * DEG_TO_RAD) * cos(deg * DEG_TO_RAD);
	float y_2 = small_radius * cos(small_deg * DEG_TO_RAD) * sin(deg * DEG_TO_RAD);

	float x = x_1 + x_2;
	float y = y_1 + y_2;
	float z = small_radius * sin(small_deg * DEG_TO_RAD);

	return ofPoint(x, y, z);
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(39);

ofSetWindowTitle("Insta");

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

ofSetLineWidth(1.5);

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

float radius = 300;

vector<ofColor> colors = {ofColor(239, 39, 39), ofColor(39, 239, 39), ofColor(39, 39, 239)};

for (int loop = 0; loop < 2; loop++) {

ofRotateX(loop * 90);

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

float sphere_deg = (360 / colors.size()) * i + ofGetFrameNum();

ofPoint sphere_point = ofPoint(radius * cos(sphere_deg * DEG_TO_RAD), radius * sin(sphere_deg * DEG_TO_RAD));

ofFill();

ofSetColor(colors[i]);

ofDrawSphere(sphere_point, 5);

int deg_span = 5;

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

int small_deg_span = 5;

float small_radius = 80;

vector<ofPoint> vertices;

for (int small_deg = 0; small_deg < 360; small_deg += small_deg_span) {

ofPoint point = make_point(radius, small_radius, deg, small_deg);

float distance = sphere_point.distance(point);

ofSetColor(colors[i], ofMap(distance, 0, 250, 255, 0));

if (distance < 250) {

vertices.push_back(point);

ofPoint next_point = make_point(radius, small_radius, deg + deg_span, small_deg);

ofDrawLine(point, next_point);

}

ofNoFill();

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

}

this->cam.end();

}

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

ofPoint ofApp::make_point(float radius, float small_radius, float deg, float small_deg) {

float x_1 = radius * cos(deg * DEG_TO_RAD);

float y_1 = radius * sin(deg * DEG_TO_RAD);

float x_2 = small_radius * cos(small_deg * DEG_TO_RAD) * cos(deg * DEG_TO_RAD);

float y_2 = small_radius * cos(small_deg * DEG_TO_RAD) * sin(deg * DEG_TO_RAD);

float x = x_1 + x_2;

float y = y_1 + y_2;

float z = small_radius * sin(small_deg * DEG_TO_RAD);

return ofPoint(x, y, z);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180423

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