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伸び縮みする円を重ねる
Cirlces.
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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) {}; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(239); ofSetColor(39); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { auto center = glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5); auto span = 20; for (auto radius = 50; radius < 350; radius += span) { vector<glm::vec2> inner, outer; int deg_start = ofRandom(360); int deg_width = (int)(ofRandom(0, 360) + ofGetFrameNum() * ofRandom(1, 5)) % 720; if (deg_width < 360) { for (auto deg = deg_start; deg <= deg_start + deg_width; deg++) { inner.push_back(center + glm::vec2((radius - span * 0.45) * cos(deg * DEG_TO_RAD), (radius - span * 0.45) * sin(deg * DEG_TO_RAD))); outer.push_back(center + glm::vec2((radius + span * 0.45) * cos(deg * DEG_TO_RAD), (radius + span * 0.45) * sin(deg * DEG_TO_RAD))); } } else { for (auto deg = deg_start + deg_width - 360; deg <= deg_start + 360; deg++) { inner.push_back(center + glm::vec2((radius - span * 0.45) * cos(deg * DEG_TO_RAD), (radius - span * 0.45) * sin(deg * DEG_TO_RAD))); outer.push_back(center + glm::vec2((radius + span * 0.45) * cos(deg * DEG_TO_RAD), (radius + span * 0.45) * sin(deg * DEG_TO_RAD))); } } reverse(inner.begin(), inner.end()); ofBeginShape(); ofVertices(outer); ofVertices(inner); ofEndShape(true); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |