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何も考えず思いついたままに。
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#include "ofMain.h" #include "ofFbo.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) {}; ofFbo fbo; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofBackground(0); ofSetWindowTitle("Insta"); this->fbo.allocate(ofGetWidth(), ofGetHeight()); } //-------------------------------------------------------------- void ofApp::update() { int deg_span = 10; float radius = 0; float radius_span = 30; int layer = 35; this->fbo.begin(); ofClear(0); for (int deg = 0; deg < 360; deg += deg_span) { radius = 0; for (int i = 0; i < layer; i++) { float noise_value = ofNoise(deg * 0.005, i * 0.005 - ofGetFrameNum() * 0.005); ofColor color; color.setHsb(noise_value * 255, 255, 255); ofSetColor(color); ofBeginShape(); for (int tmp_deg = deg; tmp_deg <= deg + deg_span; tmp_deg += 1) { ofVertex(radius * cos(tmp_deg * DEG_TO_RAD) + ofGetWidth() / 2, radius * sin(tmp_deg * DEG_TO_RAD) + ofGetHeight() / 2); } for (int tmp_deg = deg + deg_span; tmp_deg >= deg; tmp_deg -= 1) { ofVertex((radius + radius_span) * cos(tmp_deg * DEG_TO_RAD) + ofGetWidth() / 2, (radius + radius_span) * sin(tmp_deg * DEG_TO_RAD) + ofGetHeight() / 2); } ofEndShape(true); radius += radius_span; } } this->fbo.end(); } //-------------------------------------------------------------- void ofApp::draw() { this->fbo.draw(0, 0); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |