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赤輪。
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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<glm::vec2> velocity_list; vector<float> speed_list; vector<float> life_list; vector<ofColor> color_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(25); ofSetWindowTitle("openframeworks"); ofBackground(0); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); } //-------------------------------------------------------------- void ofApp::update() { ofColor color; for (int i = 0; i < 1000; i++) { auto deg = ofRandom(360); auto location = glm::vec2(200 * cos(deg * DEG_TO_RAD), 200 * sin(deg * DEG_TO_RAD)); auto next = glm::vec2(201 * cos(deg * DEG_TO_RAD), 201 * sin(deg * DEG_TO_RAD)); this->location_list.push_back(location); if (ofRandom(100) < 50) { this->velocity_list.push_back(next - location); } else { this->velocity_list.push_back(location - next); } this->speed_list.push_back(ofRandom(5, 10)); this->life_list.push_back(12); color.setHsb(0, 255, ofRandom(255)); this->color_list.push_back(color); } for (int i = this->location_list.size() - 1; i >= 0; i--) { auto fueture = glm::normalize(this->velocity_list[i]) * 30; auto deg = ofMap(ofNoise(glm::vec3(this->location_list[i] * 0.01, ofGetFrameNum() * 0.005)), 0, 1, -360, 360); fueture = fueture + glm::vec2(10 * cos(deg * DEG_TO_RAD), 10 * sin(deg * DEG_TO_RAD)); this->location_list[i] += glm::normalize(fueture) * this->speed_list[i]; this->life_list[i] -= 1; if (this->life_list[i] < 0) { this->location_list.erase(this->location_list.begin() + i); this->velocity_list.erase(this->velocity_list.begin() + i); this->speed_list.erase(this->speed_list.begin() + i); this->life_list.erase(this->life_list.begin() + i); this->color_list.erase(this->color_list.begin() + i); } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); for (int i = 0; i < this->location_list.size(); i++) { ofSetColor(this->color_list[i], ofMap(this->life_list[i], 0, 12, 32, 255)); ofDrawCircle(this->location_list[i], 1.5); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |