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noise関数でそれぞれの半円の長さを決定しています。
The semicircular length is determined by the noise function.
[ Source ]
ofApp.h
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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 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) {}; ofEasyCam cam; }; |
ofApp.cpp
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofBackground(0); ofSetWindowTitle("Insta"); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); float x, y; float noise_value; ofVec2f prev_point; for (int radius = 50; radius < 350; radius += 10) { noise_value = 45 + 360 * ofNoise(ofGetFrameNum() * 0.01 + radius * 0.005); for (int deg = 0; deg <= noise_value; deg += 1) { x = radius * cos(deg * DEG_TO_RAD); y = radius * sin(deg * DEG_TO_RAD); if (deg > 0) { ofDrawLine(prev_point, ofVec2f(x, y)); } prev_point = ofVec3f(x, y); } ofDrawCircle(prev_point, 3); } this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |