[ Video ]
[ About ]
黒い球体から発生する輪。
A ring arising from a black sphere.
[ Source ]
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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) {}; ofEasyCam cam; vector<float> radius_list; vector<float> speed_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(0); ofSetCircleResolution(60); ofEnableDepthTest(); } //-------------------------------------------------------------- void ofApp::update() { for (int i = this->radius_list.size() - 1; i >= 0; i--) { this->radius_list[i] += this->speed_list[i]; if (this->radius_list[i] > 450) { this->radius_list.erase(this->radius_list.begin() + i); this->speed_list.erase(this->speed_list.begin() + i); } } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); if (ofRandom(100) < 25) { this->radius_list.push_back(100); this->speed_list.push_back(ofRandom(0.5, 1.5)); } ofFill(); ofSetColor(0); ofDrawSphere(glm::vec3(), 100); for (auto& radius : this->radius_list) { auto alpha = radius < 300 ? 255 : ofMap(radius, 300, 450, 255, 0); ofNoFill(); ofSetColor(255, alpha); ofDrawCircle(glm::vec3(), radius); } this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |