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200度の四角形を書いて、以前作成したねじれC openFrameworksの方法でズラシてみました。
この一部が欠けた四角形を描写するロジック、スマートな方法が思いつかずドロ臭い方法で実装となりました。無念。
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#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) {}; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofBackground(239); ofSetWindowTitle("Insta"); ofNoFill(); ofSetColor(39); ofSetLineWidth(3); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2); for (int len = 10; len < 350; len += 10) { int noise_deg = ofNoise(len * 0.005 - ofGetFrameNum() * 0.01) * 720; ofBeginShape(); for (int deg = noise_deg; deg <= noise_deg + 200; deg++) { int param = (deg + 45) / 90; ofPoint point; switch (param % 4) { case 0: ofVertex(ofPoint(len, ofMap((deg + 45) % 90, 0, 89, -len, len))); break; case 1: ofVertex(ofPoint(ofMap((deg + 45) % 90, 0, 89, len, -len), len)); break; case 2: ofVertex(ofPoint(-len, ofMap((deg + 45) % 90, 0, 89, len, -len))); break; case 3: ofVertex(ofPoint(ofMap((deg + 45) % 90, 0, 89, -len, len), -len)); break; } } ofEndShape(); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |