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一つの円を15度区切りで中心を軸に、X、Yに対してRotateしています。結構、忙しなくパラパラしているんですが、最後の揃う部分だけすぅーと揃うところが良いですね。
[ Source ]
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#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; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofBackground(239); ofSetWindowTitle("Insta"); ofSetColor(39); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); int radius = 300; int deg_span = 15; for (int deg = 0; deg < 360; deg += deg_span) { ofRotateX(ofGetFrameNum() * 0.25); ofRotateY(ofGetFrameNum() * 0.25); vector<ofPoint> vertices; vertices.push_back(ofPoint(0, 0)); 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))); deg % (deg_span * 2) == 0 ? ofSetColor(239, 39, 39) : ofSetColor(239); ofFill(); ofBeginShape(); ofVertices(vertices); ofEndShape(true); ofSetColor(39); ofNoFill(); ofBeginShape(); ofVertices(vertices); ofEndShape(true); } this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |