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色付きドット。
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ofApp.h
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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::vec2> location_list; vector<int> life_list; vector<ofColor> color_list; float noise_value; }; |
ofApp.cpp
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openFrameworks"); ofBackground(39); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); } //-------------------------------------------------------------- void ofApp::update() { this->noise_value += 0.03; ofColor color; for (int i = 0; i < 300; i++) { auto radius = ofRandom(150, 250); auto deg = ofRandom(360); color.setHsb(ofRandom(0, 255), 255, 1503); auto location = glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)); this->location_list.push_back(location); this->life_list.push_back(0); this->color_list.push_back(color); } for (int i = this->location_list.size() - 1; i >= 0; i--) { if (abs(this->location_list[i].x) > 460 || abs(this->location_list[i].y) > 460) { this->location_list.erase(this->location_list.begin() + i); this->life_list.erase(this->life_list.begin() + i); this->color_list.erase(this->color_list.begin() + i); } if (this->life_list[i] > 15) { this->location_list.erase(this->location_list.begin() + i); this->life_list.erase(this->life_list.begin() + i); this->color_list.erase(this->color_list.begin() + i); } } for (int i = 0; i < this->location_list.size(); i++) { auto deg = ofMap(ofNoise(this->location_list[i].x * 0.015, this->location_list[i].y * 0.015, this->noise_value), 0, 1, -360, 360); auto next = this->location_list[i] + glm::vec2(5 * cos(deg * DEG_TO_RAD), 5 * sin(deg * DEG_TO_RAD)); this->location_list[i] = next; this->life_list[i] += 1; } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); for (int i = 0; i < this->location_list.size(); i++) { auto size = this->life_list[i] < 10 ? ofMap(this->life_list[i], 0, 10, 0, 3) : 3; auto alpha = this->life_list[i] > 10 ? ofMap(this->life_list[i], 10, 15, 255, 0) : 255; ofSetColor(this->color_list[i], alpha); ofDrawCircle(this->location_list[i], size); } /* int start = 100; if (ofGetFrameNum() > start) { ostringstream os; os << setw(4) << setfill('0') << ofGetFrameNum() - start; ofImage image; image.grabScreen(0, 0, ofGetWidth(), ofGetHeight()); image.saveImage("image/cap/img_" + os.str() + ".jpg"); if (ofGetFrameNum() - start >= 25 * 20) { std::exit(1); } } */ } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |