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立方体の表面座標をなぞりながら、一方向に向かって動く線をたくさん描写しています。それぞれの線がもつ高さの初期位置を、立方体一辺よりも狭い範囲の乱数にすることで、スパンごとの微妙な隙間が空き、ループしている事がハッキリ可視化することが出来て新しい発見でした。
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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) {}; ofEasyCam cam; ofPoint make_rect_point(float half_len, int deg, int z); }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofBackground(39); ofSetWindowTitle("Insta"); ofEnableDepthTest(); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateX(270); ofRotateZ(230); for (int i = 0; i < 200; i++) { vector<ofPoint> points; int z_param = ofRandom(250); int deg_param = ofRandom(360); ofColor color; color.setHsb(ofRandom(255), 255, 255); for (int i = 0; i < 15; i++) { int z = (z_param + ((ofGetFrameNum() + i) * 5)) % 500 - 250; int deg = deg_param + (ofGetFrameNum() + i) * 5; ofPoint point = this->make_rect_point(250, deg, z); points.push_back(point); } for (int i = 1; i < points.size(); i++) { if (points[i - 1].distance(points[i]) < 100) { ofSetColor(color, ofMap(points[i - 1].y + points[i - 1].x, -500, 500, 64, 255)); ofDrawLine(points[i - 1], points[i]); } } } this->cam.end(); } //-------------------------------------------------------------- ofPoint ofApp::make_rect_point(float half_len, int deg, int z) { int param = (deg + 45) / 90; ofPoint point; switch (param % 4) { case 0: return ofPoint(half_len, ofMap((deg + 45) % 90, 0, 89, -half_len, half_len),z); case 1: return ofPoint(ofMap((deg + 45) % 90, 0, 89, half_len, -half_len), half_len, z); case 2: return ofPoint(-half_len, ofMap((deg + 45) % 90, 0, 89, half_len, -half_len), z); case 3: return ofPoint(ofMap((deg + 45) % 90, 0, 89, -half_len, half_len), -half_len, z); default: return ofPoint(); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |