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囲ったパーティクルを表示する。
Show enclosed particles.
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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 mouseEntered(int x, int y) {}; void mouseExited(int x, int y) {}; void windowResized(int w, int h) {}; void dragEvent(ofDragInfo dragInfo) {}; void gotMessage(ofMessage msg) {}; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(239); ofSetColor(39); ofSetLineWidth(3); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { vector<glm::vec2> location_list; int span = 36; for(int x = span * 0.5; x < ofGetWidth(); x += span){ for (int y = span * 0.5; y < ofGetHeight(); y += span) { location_list.push_back(glm::vec2( x + ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.001), 0, 1, span * -0.4, span * 0.4), y + ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.001), 0, 1, span * -0.4, span * 0.4))); } } for (int i = 0; i < location_list.size(); i++) { float max_alpha = 0; for (int k = 0; k < location_list.size(); k++) { if (i == k) { continue; } auto distance = glm::distance(location_list[i], location_list[k]); if (distance < span * 0.85) { vector<glm::vec2> vertices; auto direction_rad = std::atan2(location_list[k].y - location_list[i].y, location_list[k].x - location_list[i].x); auto direction_deg = direction_rad * RAD_TO_DEG + 90; int radius = 8; for (int deg = direction_deg; deg <= direction_deg + 180; deg += 3) { vertices.push_back(location_list[i] + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD))); } for (int deg = direction_deg + 180; deg <= direction_deg + 360; deg += 3) { vertices.push_back(location_list[k] + glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD))); } auto alpha = distance < span * 0.6 ? 255 : ofMap(distance, span * 0.6, span * 0.85, 255, 0); ofSetColor(39, alpha); ofNoFill(); ofBeginShape(); ofVertices(vertices); ofEndShape(true); if (alpha > max_alpha) { max_alpha = alpha; } } } ofFill(); ofSetColor(39, max_alpha); ofDrawCircle(location_list[i], 4); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |