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半径の長さで生成数を変える。
Change the number of products generated by the length of the radius.
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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<float> life_list; vector<float> life_speed_list; vector<float> life_span_list; ofMesh line; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openframeworks"); ofBackground(255); ofSetColor(0); ofSetLineWidth(1.5); ofSetRectMode(ofRectMode::OF_RECTMODE_CENTER); this->line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { for (int i = this->location_list.size() - 1; i >= 0; i--) { this->life_list[i] += this->life_speed_list[i]; if (this->life_list[i] > this->life_span_list[i]) { this->location_list.erase(this->location_list.begin() + i); this->life_list.erase(this->life_list.begin() + i); this->life_speed_list.erase(this->life_speed_list.begin() + i); this->life_span_list.erase(this->life_span_list.begin() + i); } } for (int i = 0; i < 2; i++) { int random_radius = ((ofGetFrameNum() * 4 + i * 320) % 640) + ofRandom(-10, 10); int loop_count = random_radius < 120 ? ofMap(random_radius, 0, 120, 0, 10) : ofMap(random_radius, 120, 640, 10, 120); for (int k = 0; k < loop_count; k++) { int random_deg = ofRandom(360); auto location = glm::vec2(random_radius * cos(random_deg * DEG_TO_RAD), random_radius * sin(random_deg * DEG_TO_RAD)); this->location_list.push_back(location); this->life_list.push_back(1); this->life_speed_list.push_back(ofRandom(0.2, 1.5)); this->life_span_list.push_back(ofRandom(5, 30)); } } this->line.clear(); for (int i = 0; i < this->location_list.size(); i++) { this->line.addVertex(glm::vec3(this->location_list[i], 0)); this->line.addColor(ofColor(0, ofMap(this->life_list[i], 1, this->life_span_list[i], 255, 30))); } for (int i = 0; i < this->line.getNumVertices(); i++) { for (int k = i + 1; k < this->line.getNumVertices(); k++) { auto distance = glm::distance(this->line.getVertex(i), this->line.getVertex(k)); if (distance < 30) { this->line.addIndex(i); this->line.addIndex(k); } } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWindowSize() * 0.5); this->line.drawWireframe(); for (int i = 0; i < this->location_list.size(); i++) { ofNoFill(); ofDrawRectangle(this->location_list[i], 10, 10); ofFill(); ofDrawCircle(this->location_list[i], 3); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |