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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。
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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) {}; }; |
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#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()); } |