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虹色波。
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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) {}; float radius; vector<glm::vec2> location_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetLineWidth(1.5); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->radius = 20; auto x_span = radius * sqrt(3); auto flg = true; for (float y = -650; y < 650; y += radius * 1.5) { for (float x = -650; x < 650; x += x_span) { glm::vec2 location; if (flg) { location = glm::vec2(x, y); } else { location = glm::vec2(x + (x_span / 2), y); } this->location_list.push_back(location); } flg = !flg; } } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); ofRotateZ(ofGetFrameNum() * 0.6666666666666666); ofColor color; for (int i = 0; i < 8; i++) { color.setHsb(ofMap(i, 0, 8, 0, 255), 255, 255); auto noise_seed = ofRandom(1000); for (auto& location : this->location_list) { auto noise_y = ofMap(ofNoise(noise_seed, location.x * 0.0005 + ofGetFrameNum() * 0.0025), 0, 1, -400, 400); auto distance = abs(location.y - noise_y); if (distance < this->radius * 3) { vector<glm::vec2> vertices; for (int deg = 90; deg < 450; deg += 60) { vertices.push_back(location + glm::vec2(this->radius * cos(deg * DEG_TO_RAD), this->radius * sin(deg * DEG_TO_RAD))); } ofNoFill(); ofSetColor(color, ofMap(distance, 0, this->radius * 3, 255, 0)); ofBeginShape(); ofVertices(vertices); ofEndShape(true); ofFill(); ofSetColor(color, ofMap(distance, 0, this->radius * 3, 128, 0)); ofBeginShape(); ofVertices(vertices); ofEndShape(true); } } } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |