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色をHSBで指定して、HUEをフレーム番号で変化させる。
Specify the color by HSB, and change the HUE by frame number.
[ 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) {}; vector<glm::vec3> base_location_list; vector<ofColor> base_color_list; vector<vector<glm::vec2>> log_list; vector<ofColor> color_list; vector<float> life_list; float base_radius; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofNoFill(); ofSetLineWidth(1.5); ofSetCircleResolution(60); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->base_radius = 150; for (int deg = 0; deg < 360; deg++) { this->base_location_list.push_back(glm::vec3(this->base_radius * cos(deg * DEG_TO_RAD), this->base_radius * sin(deg * DEG_TO_RAD) - 150, 0)); } } //-------------------------------------------------------------- void ofApp::update() { int radius = 6; ofColor color; while (this->log_list.size() < 800) { int font_location_index = ofRandom(this->base_location_list.size()); vector<glm::vec2> log; log.push_back(this->base_location_list[font_location_index]); this->log_list.push_back(log); color.setHsb((ofGetFrameNum() * 2) % 255, 200, 100); this->color_list.push_back(color); this->life_list.push_back(ofRandom(10, 200)); } for (int i = this->log_list.size() - 1; i >= 0; i--) { this->life_list[i] -= 1; if (this->life_list[i] < 0) { this->log_list.erase(this->log_list.begin() + i); this->color_list.erase(this->color_list.begin() + i); this->life_list.erase(this->life_list.begin() + i); continue; } auto deg = ofMap(ofNoise(glm::vec3(this->log_list[i].back() * 0.008, ofGetFrameNum() * 0.0015)), 0, 1, 45, 125 + 10); this->log_list[i].push_back(this->log_list[i].back() + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD))); while (this->log_list[i].size() > 100) { this->log_list[i].erase(this->log_list[i].begin()); } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); for (int i = 0; i < this->log_list.size(); i++) { ofSetColor(this->color_list[i], this->life_list[i] > 30 ? 255 : ofMap(this->life_list[i], 0, 30, 0, 255)); ofBeginShape(); ofVertices(this->log_list[i]); ofEndShape(); } ofSetColor(255); ofDrawCircle(glm::vec3(0, -150, 0), 150); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |