circle – ページ 130 – プログラミング de 落描き

2018年4月19日2018年4月18日

Lineで円を描く openFrameworks

[ Video ]

[ About ]
円周上を一定間隔の角度で結ぶ線を描写、沢山重ねて円を描いてみました。

[ 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) {};
};

#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(39);
	ofSetWindowTitle("Insta");

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

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

}

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

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

	int radius = 150;
	int deg_span = 10;
	ofColor line_color;
	for (int deg = 0; deg < 360; deg += deg_span) {

		ofPoint start = ofPoint(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));
		ofPoint end = ofPoint(radius * cos((deg + deg_span) * DEG_TO_RAD), radius * sin((deg + deg_span) * DEG_TO_RAD));
		ofPoint gap = end - start;

		ofPoint line_start = end + gap * 100;
		ofPoint line_end = start - gap * 100;

		line_color.setHsb(((int)ofMap(deg, 0, 360, 0, 255) + ofGetFrameNum()) % 255, 255, 255);
		ofSetColor(line_color);

		ofDrawLine(line_start, line_end);
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(39);

ofSetWindowTitle("Insta");

ofSetLineWidth(1.5);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

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

int radius = 150;

int deg_span = 10;

ofColor line_color;

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

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

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

ofPoint gap = end - start;

ofPoint line_start = end + gap * 100;

ofPoint line_end = start - gap * 100;

line_color.setHsb(((int)ofMap(deg, 0, 360, 0, 255) + ofGetFrameNum()) % 255, 255, 255);

ofSetColor(line_color);

ofDrawLine(line_start, line_end);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180418

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2018年4月16日2018年4月15日

グラデーションサークル openFrameworks

[ Video ]

[ About ]
異なる半径を持つ2つの円周上を等間隔の角度で区切り、4点を結んで図形を描写しています。一つの円はNoise関数で半径が変動しているので、真ん中にニョキニョキ伸びているように見えます。

[ 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) {};
};

#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(39);
	ofSetWindowTitle("Insta");
}

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

}

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

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

	int radius = 300;
	int deg_span = 5;
	for (int deg = 0; deg <= 360; deg += deg_span) {

		ofColor color;
		color.setHsb(ofMap(deg, 0, 360, 0, 255), 239, 239);
		ofSetColor(color);

		ofPoint noise_point = ofPoint(radius * cos((deg + deg_span / 2) * DEG_TO_RAD) * 0.005, radius * sin((deg + deg_span / 2) * DEG_TO_RAD));
		float noise_value = ofNoise(noise_point.x * 0.05, noise_point.y * 0.05, ofGetFrameNum() * 0.01);

		vector<ofPoint> vertices;
		vertices.push_back(ofPoint(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));
		vertices.push_back(ofPoint(radius * cos((deg + deg_span) * DEG_TO_RAD), radius * sin((deg + deg_span) * DEG_TO_RAD)));
		vertices.push_back(ofPoint(radius * noise_value * cos((deg + deg_span) * DEG_TO_RAD), radius * noise_value * sin((deg + deg_span) * DEG_TO_RAD)));
		vertices.push_back(ofPoint(radius * noise_value * cos(deg * DEG_TO_RAD), radius * noise_value * sin(deg * DEG_TO_RAD)));

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

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(39);

ofSetWindowTitle("Insta");

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

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

int radius = 300;

int deg_span = 5;

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

ofColor color;

color.setHsb(ofMap(deg, 0, 360, 0, 255), 239, 239);

ofSetColor(color);

ofPoint noise_point = ofPoint(radius * cos((deg + deg_span / 2) * DEG_TO_RAD) * 0.005, radius * sin((deg + deg_span / 2) * DEG_TO_RAD));

float noise_value = ofNoise(noise_point.x * 0.05, noise_point.y * 0.05, ofGetFrameNum() * 0.01);

vector<ofPoint> vertices;

vertices.push_back(ofPoint(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));

vertices.push_back(ofPoint(radius * cos((deg + deg_span) * DEG_TO_RAD), radius * sin((deg + deg_span) * DEG_TO_RAD)));

vertices.push_back(ofPoint(radius * noise_value * cos((deg + deg_span) * DEG_TO_RAD), radius * noise_value * sin((deg + deg_span) * DEG_TO_RAD)));

vertices.push_back(ofPoint(radius * noise_value * cos(deg * DEG_TO_RAD), radius * noise_value * sin(deg * DEG_TO_RAD)));

ofBeginShape();

ofVertices(vertices);

ofEndShape(true);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180415

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2018年4月15日2018年4月14日

蜃気楼 openFrameworks

[ Video ]

[ About ]
円の両端を結ぶ線を描写しながら、Noise関数を使ってX座標をズラしています。Noise関数の値は0-1の間のになりますが、0.75以上であれば+方向にズラし、0.35以下であれば-方向にズラすという事をしています。そうすることで、円の形をある程度保ちながら、ぐねぐねした表現をすることができます。

[ 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) {};
};

#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(239, 39, 39);
	ofSetLineWidth(3);
}

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

}

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

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

	int radius = 250;
	for (int deg = 90; deg <= 270; deg += 3) {

		ofPoint point = ofPoint(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));
		float noise_value = ofNoise(deg * 0.05, ofGetFrameNum() * 0.005);
		float x_param = 0;

		if (noise_value > 0.75) {
	
			x_param = ofMap(noise_value, 0.75, 1.0, 0, 200);
		}
		else if(noise_value < 0.35) {

			x_param = ofMap(noise_value, 0.35, 0.0, 0, -200);
		}

		ofDrawLine(point.x + x_param, point.y, -point.x + x_param, point.y);
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(239);

ofSetWindowTitle("Insta");

ofSetColor(239, 39, 39);

ofSetLineWidth(3);

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

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

int radius = 250;

for (int deg = 90; deg <= 270; deg += 3) {

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

float noise_value = ofNoise(deg * 0.05, ofGetFrameNum() * 0.005);

float x_param = 0;

if (noise_value > 0.75) {

x_param = ofMap(noise_value, 0.75, 1.0, 0, 200);

}

else if(noise_value < 0.35) {

x_param = ofMap(noise_value, 0.35, 0.0, 0, -200);

}

ofDrawLine(point.x + x_param, point.y, -point.x + x_param, point.y);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180414

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Amazon

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