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sin波 x cos波。
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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) {}; ofMesh mesh; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetLineWidth(1.5); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->mesh.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(0, ofGetWindowHeight() * 0.5); int span = 5; ofColor color; ofMesh line; line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); for (int base_y = -150; base_y <= 150; base_y += 300) { for (int hue = 0; hue <= 256; hue += 16) { color.setHsb(hue, 255, 255); auto scale = 0.02; for (int start_x = 30; start_x < ofGetWindowWidth(); start_x += 120) { for (int x = start_x; x < start_x + 90; x += span) { auto y = start_x % 120 == 30 ? base_y + ofMap(sin((hue + x) * scale + ofGetFrameNum() * 0.05), -1, 1, -80, 80) : base_y + ofMap(cos((hue + x) * scale + ofGetFrameNum() * 0.05), -1, 1, -80, 80); line.addVertex(glm::vec3(x, y, 0)); line.addColor(color); if (x > start_x) { line.addIndex(line.getNumVertices() - 1); line.addIndex(line.getNumVertices() - 2); } else { ofSetColor(color); ofDrawCircle(line.getVertex(line.getNumVertices() - 1), 2); } } ofSetColor(color); ofDrawCircle(line.getVertex(line.getNumVertices() - 1), 2); } } } line.drawVertices(); line.drawWireframe(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |