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 size2 double stroke double npt int double VARIABLE_EDITOR basic true true x double y double vx double vy double k double m double g double double double VARIABLE_EDITOR language true true l_play String l_pause String l_reset String l_init String label String l_step String l_springL0 String l_springL String String VARIABLE_EDITOR view true true y0 double y1 double y2 double dy double slope double L double r double c double f double ax double ay double double CODE_EDITOR 初始值 true true ODE_EDITOR ODE true true t dt vx vy ax=getFx(x,y-y0)/m ay=getFy(x,y-y0)/m RungeKutta LIBRARY_EDITOR chinese true true LIBRARY_EDITOR playpause true true LIBRARY_EDITOR getF true true true Elements.Frame Frame true true Elements.Panel Panel Frame south Elements.Button reset Panel Elements.Button initialize Panel Elements.Button playpause Panel Elements.Slider Sliderg Panel Elements.Slider SliderL0 Panel west 1.5*ymax)L=1.5*ymax; drag();]]> Elements.Bar Bar Panel true Elements.Panel Panel2 Frame center true Elements.DrawingPanel DrawingPanel Panel2 center Elements.Arrow wire DrawingPanel ymax/2)y1=ymax/2; else if(y1ymax/2)dy=ymax/2-y1; else if(y1+dy Elements.Spring Spring DrawingPanel Elements.Particle Particle DrawingPanel Elements.Arrow ArrowF DrawingPanel Elements.Arrow ArrowV DrawingPanel Elements.Text TextF DrawingPanel 0]]> true Elements.PlottingPanel PlottingPanel Panel2 Elements.Trace Tracexv PlottingPanel