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円柱状を移動する点を近づいたら線で結ぶ。色情報はXとY座標から計算する。
When you get close to the point where you want to move the cylinder shape, connect it with a line. The color information is calculated from the X and Y coordinates.
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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) {}; ofMesh line; ofEasyCam cam; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofSetLineWidth(0.8); ofEnableDepthTest(); this->line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); this->line.clear(); auto radius = 300; auto deg_span = 5; for (int x = -350; x <= 350; x += 700) { for (int deg = 0; deg < 360; deg += deg_span) { this->line.addVertex(glm::vec3(x + radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), -radius)); this->line.addColor(ofColor()); this->line.addVertex(glm::vec3(x + radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), radius)); this->line.addColor(ofColor()); } for (int i = 0; i < 800; i++) { int z = (int)(ofRandom(radius * 2) + ofGetFrameNum() * ofRandom(1, 3)) % radius * 2 - radius; if (x == 350) { z = -z; } int deg = (int)ofRandom(0, 360) / deg_span * deg_span; this->line.addVertex(glm::vec3(x + radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD), z)); this->line.addColor(ofColor()); } } auto color = ofColor(); for (int i = 0; i < this->line.getNumVertices(); i++) { auto location = this->line.getVertex(i); auto hue = ofMap(location.x, -600, 600, 0, 255); auto alpha = ofMap(location.y, -radius, radius, 255, 32); color.setHsb(hue, 255, 255, alpha); this->line.setColor(i, color); for (int k = i + 1; k < this->line.getNumVertices(); k++) { auto other = this->line.getVertex(k); float distance = glm::distance(location, other); if (distance < 50) { this->line.addIndex(i); this->line.addIndex(k); } } } } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateX(270); this->line.drawWireframe(); for (int i = 0; i < this->line.getNumVertices(); i++) { ofSetColor(this->line.getColor(i)); ofDrawSphere(this->line.getVertex(i), 4); } this->cam.end(); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |