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波形。
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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 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); } //-------------------------------------------------------------- void ofApp::update() { } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); ofSeedRandom(39); ofSetColor(39); for (int deg = 0; deg < 360; deg += 30) { ofPushMatrix(); ofRotate(deg); auto base_location = glm::vec2(0, -100); auto target_location = glm::vec2(0, -340); auto distance = target_location - base_location; auto len = glm::length(distance); auto noise_seed = ofRandom(1000); ofBeginShape(); for (int d = 0; d <= len; d += 1) { auto location = base_location + glm::normalize(distance) * d; auto gap = abs(len * 0.5 - d); auto power = gap < len * 0.35 ? 1 : ofMap(gap, len * 0.35, len * 0.5, 1, 0); auto noise_x = ofMap(ofNoise(noise_seed, location.x * 0.05, location.y * 0.015 + ofGetFrameNum() * 0.035), 0, 1, -50, 50); location += glm::vec2(noise_x * power, 0); ofVertex(location); } ofEndShape(); ofPopMatrix(); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |