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回る色輪
Rotate color ring.
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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(39); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); auto radius_span = 50; auto deg_span = 5; for (auto radius = 50; radius < 350; radius += radius_span) { ofRotate(ofGetFrameNum()); for (auto deg = 0; deg < 360; deg += deg_span) { ofColor color; color.setHsb(ofMap(deg, 0, 360, 0, 255), 255, 255); ofSetColor(color); ofBeginShape(); ofVertex(glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD))); ofVertex(glm::vec2(radius * cos((deg + deg_span) * DEG_TO_RAD), radius * sin((deg + deg_span) * DEG_TO_RAD))); ofVertex(glm::vec2((radius + radius_span) * cos((deg + deg_span) * DEG_TO_RAD), (radius + radius_span) * sin((deg + deg_span) * DEG_TO_RAD))); ofVertex(glm::vec2((radius + radius_span) * cos((deg)* DEG_TO_RAD), (radius + radius_span) * sin((deg)* DEG_TO_RAD))); ofEndShape(); } } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |