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SNSに投稿を始めたころのヤツをイメージして。以前はParticleクラスとして定義していましたが、今回はRandomとNoiseを使って毎フレーム計算して算出するようにしました。
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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"); //ofBackground(39); //ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofSeedRandom(39); ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2); float radius = 250; for (int i = 0; i < 512; i++) { float size = ofRandom(20.f); float deg = ofRandom(360.f) + ofGetFrameNum() * ofMap(size, 0, 20, 0.8, 0.15); float noise_value = ofMap(ofNoise(i * 0.5, ofGetFrameNum() * 0.005), 0, 1, 0.8, 1.2); float x = radius * noise_value * cos(deg * DEG_TO_RAD); float y = radius * noise_value * sin(deg * DEG_TO_RAD); ofPoint point = ofPoint(x, y); ofColor c; c.setHsb(i % 256, 239, 239); ofSetColor(c, 139); ofFill(); ofDrawCircle(point, size); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |