openframeworks – ページ 646 – 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18日2018年4月17日

IcoSphereを変形 openFrameworks

[ Video ]

[ About ]
IcoSphereクラスから取得できる座標を変形させて遊んでいます。球体を構成する三角形(面)情報が取得できるので、中心座標を計算・図形で結んで、出っ張りを描写しています。

球体の半径を変化させているので、球体とトゲトゲの形に変形するのが楽しいですね。

[ 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;
};

#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;

};

#include "ofApp.h"

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

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

	ofEnableDepthTest();
}

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

}

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

	this->cam.begin();
	ofRotateX(ofGetFrameNum() * 0.1);
	ofRotateY(ofGetFrameNum() * 0.25);

	float radius = 400 * ofNoise(ofGetFrameNum() * 0.01);
	ofIcoSpherePrimitive ico_sphere = ofIcoSpherePrimitive(radius , 2);
	vector<ofMeshFace> triangles = ico_sphere.getMesh().getUniqueFaces();
	for (int i = 0; i < triangles.size(); i++) {

		ofPoint average = (triangles[i].getVertex(0) + triangles[i].getVertex(1) + triangles[i].getVertex(2)) / 3;
		average = average.normalized() * 240;

		ofFill();
		ofSetColor(239);
		ofBeginShape();
		ofVertex(triangles[i].getVertex(0).x, triangles[i].getVertex(0).y, triangles[i].getVertex(0).z);
		ofVertex(triangles[i].getVertex(1).x, triangles[i].getVertex(1).y, triangles[i].getVertex(1).z);
		ofVertex(triangles[i].getVertex(2).x, triangles[i].getVertex(2).y, triangles[i].getVertex(2).z);
		ofEndShape(true);

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

			ofFill();
			ofSetColor(239);
			ofBeginShape();
			ofVertex(average);
			ofVertex(triangles[i].getVertex(v).x, triangles[i].getVertex(v).y, triangles[i].getVertex(v).z);
			ofVertex(triangles[i].getVertex((v + 1) % 3).x, triangles[i].getVertex((v + 1) % 3).y, triangles[i].getVertex((v + 1) % 3).z);
			ofEndShape(true);

			ofNoFill();
			ofSetColor(39, 198);
			ofBeginShape();
			ofVertex(average);
			ofVertex(triangles[i].getVertex(v).x, triangles[i].getVertex(v).y, triangles[i].getVertex(v).z);
			ofVertex(triangles[i].getVertex((v + 1) % 3).x, triangles[i].getVertex((v + 1) % 3).y, triangles[i].getVertex((v + 1) % 3).z);
			ofEndShape(true);
		}
	}

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofBackground(239);

ofSetWindowTitle("Insta");

ofEnableDepthTest();

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(ofGetFrameNum() * 0.1);

ofRotateY(ofGetFrameNum() * 0.25);

float radius = 400 * ofNoise(ofGetFrameNum() * 0.01);

ofIcoSpherePrimitive ico_sphere = ofIcoSpherePrimitive(radius , 2);

vector<ofMeshFace> triangles = ico_sphere.getMesh().getUniqueFaces();

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

ofPoint average = (triangles[i].getVertex(0) + triangles[i].getVertex(1) + triangles[i].getVertex(2)) / 3;

average = average.normalized() * 240;

ofFill();

ofSetColor(239);

ofBeginShape();

ofVertex(triangles[i].getVertex(0).x, triangles[i].getVertex(0).y, triangles[i].getVertex(0).z);

ofVertex(triangles[i].getVertex(1).x, triangles[i].getVertex(1).y, triangles[i].getVertex(1).z);

ofVertex(triangles[i].getVertex(2).x, triangles[i].getVertex(2).y, triangles[i].getVertex(2).z);

ofEndShape(true);

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

ofFill();

ofSetColor(239);

ofBeginShape();

ofVertex(average);

ofVertex(triangles[i].getVertex(v).x, triangles[i].getVertex(v).y, triangles[i].getVertex(v).z);

ofVertex(triangles[i].getVertex((v + 1) % 3).x, triangles[i].getVertex((v + 1) % 3).y, triangles[i].getVertex((v + 1) % 3).z);

ofEndShape(true);

ofNoFill();

ofSetColor(39, 198);

ofBeginShape();

ofVertex(average);

ofVertex(triangles[i].getVertex(v).x, triangles[i].getVertex(v).y, triangles[i].getVertex(v).z);

ofVertex(triangles[i].getVertex((v + 1) % 3).x, triangles[i].getVertex((v + 1) % 3).y, triangles[i].getVertex((v + 1) % 3).z);

ofEndShape(true);

}

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180417

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2018年4月17日2018年4月16日

ノイズのスケール操作 openFrameworks

[ Video ]

[ About ]
等間隔にX軸に対する線をNoise関数の値だけY軸をズラしながら描写しています。

ただし、Y軸をズラす値は、Xの中心(Width / 2)からの距離で増減するようにしてあるので、中心付近は影響が大きく、離れると減少、一定距離を離れると0になります。

意図せずですが、以前ネットで見て良いなと感じたモノを作れたので良き良き。

[ 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");

	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD);
}

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

}

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

	for (int y = 0; y <= ofGetHeight(); y += 10) {

		ofColor line_color;
		line_color.setHsb(ofMap(y, 0, ofGetHeight(), 0, 255), 192, 192);
		ofSetColor(line_color);

		ofPoint prev_point = ofPoint(-1, y);
		float noise_value = 0;
		for (int x = 0; x < ofGetWidth(); x += 1) {

			float range = ofMap(ofPoint(ofGetWidth() / 2, y).distance(ofPoint(x, y)), 0, ofGetWidth() * 0.35, 100, 0);
			if (range < 0) {

				range = 0;
			}
			noise_value = ofMap(ofNoise(x * 0.005 - ofGetFrameNum() * 0.01, y * 0.01), 0, 1, -range, range);
			ofPoint point(x, y + noise_value);

			ofDrawLine(prev_point, point);
			prev_point = point;
		}
	}
}

//--------------------------------------------------------------
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);

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

for (int y = 0; y <= ofGetHeight(); y += 10) {

ofColor line_color;

line_color.setHsb(ofMap(y, 0, ofGetHeight(), 0, 255), 192, 192);

ofSetColor(line_color);

ofPoint prev_point = ofPoint(-1, y);

float noise_value = 0;

for (int x = 0; x < ofGetWidth(); x += 1) {

float range = ofMap(ofPoint(ofGetWidth() / 2, y).distance(ofPoint(x, y)), 0, ofGetWidth() * 0.35, 100, 0);

if (range < 0) {

range = 0;

}

noise_value = ofMap(ofNoise(x * 0.005 - ofGetFrameNum() * 0.01, y * 0.01), 0, 1, -range, range);

ofPoint point(x, y + noise_value);

ofDrawLine(prev_point, point);

prev_point = point;

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20180416

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