HTML_EDITOR Intro Page true true Designed by Fu-Kwun Hwang http://www.phy.ntnu.edu.tw/ntnujava/ ]]> 20 false VARIABLE_EDITOR coordinate true true range double xmin double xmax double ymin double ymax double t double dt double size double label String zero double D double stroke double np int double VARIABLE_EDITOR language true true l_play String l_pause String l_reset String l_init String l_dl String double VARIABLE_EDITOR basic true true x double y double L double k double m double v double vx double vy double scale double ax double ay double dl double dlmax double double ODE_EDITOR 微分方程式 true true t dt vx vy getF(x,y)/m getF(y,x)/m MidPoint CODE_EDITOR Cons Page true true LIBRARY_EDITOR playpause true true LIBRARY_EDITOR chinese true true LIBRARY_EDITOR getAx true true LIBRARY_EDITOR drag true true dlmax)dl=dlmax; // else if(dl<-dlmax/2)dl=-dlmax/2; r=L+dl; cta=Math.atan2(y,x); x=r*Math.cos(cta); y=r*Math.sin(cta); } ]]> true Elements.Frame Frame true true Elements.DrawingPanel DrawingPanel Frame center Elements.Particle Particle DrawingPanel Elements.Particle Particlec DrawingPanel Elements.Spring Spring DrawingPanel Elements.Arrow ArrowV2 DrawingPanel Elements.Arrow Arrowa DrawingPanel Elements.Trace Trace DrawingPanel true Elements.Panel Panel1 Frame south true Elements.Panel Panel Panel1 east Elements.Button reset Panel Elements.Button playpause Panel Elements.Slider Sliderdl Panel1 center