Tornado circle. Draw by openFrameworks – プログラミング de 落描き

[ Video ]

[ About ]
伸び縮みする円。

A circle that expands and contracts.

[ 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 mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	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 mouseEntered(int x, int y) {};

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

};

#include "ofApp.h"	

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openFrameworks");

	ofBackground(255);
	ofSetColor(0);
	ofNoFill();
	ofSetLineWidth(2);
}

//--------------------------------------------------------------
void ofApp::update() {
	
	ofSeedRandom(39);
}

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

	ofTranslate(ofGetWindowSize() * 0.5);

	auto max_loop = 5;
	auto max_radius = 480;
	for (int deg_start = 0; deg_start < 360; deg_start += 45) {

		auto loop = ofMap(ofNoise(cos(deg_start * DEG_TO_RAD) * 0.2, sin(deg_start * DEG_TO_RAD) * 0.2, ofGetFrameNum() * 0.01), 0, 1, -1.5, max_loop);

		ofBeginShape();
		for (int deg = deg_start; deg <= deg_start + 360 * loop; deg++) {

			auto radius = ofMap(deg, deg_start, deg_start + 360 * max_loop, 50, max_radius);
			auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));

			ofVertex(location);

			if (deg == deg_start) {

				ofFill();
				ofDrawCircle(location, 3);
				ofNoFill();
			}
		}
		ofEndShape();
	}
}


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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(255);

ofSetColor(0);

ofNoFill();

ofSetLineWidth(2);

}

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

void ofApp::update() {

ofSeedRandom(39);

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

auto max_loop = 5;

auto max_radius = 480;

for (int deg_start = 0; deg_start < 360; deg_start += 45) {

auto loop = ofMap(ofNoise(cos(deg_start * DEG_TO_RAD) * 0.2, sin(deg_start * DEG_TO_RAD) * 0.2, ofGetFrameNum() * 0.01), 0, 1, -1.5, max_loop);

ofBeginShape();

for (int deg = deg_start; deg <= deg_start + 360 * loop; deg++) {

auto radius = ofMap(deg, deg_start, deg_start + 360 * max_loop, 50, max_radius);

auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));

ofVertex(location);

if (deg == deg_start) {

ofFill();

ofDrawCircle(location, 3);

ofNoFill();

}

ofEndShape();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220517

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