Learning Guide Learning Guide

120 • Chapter 4: Graphicsthe resulting coloring. Use either light sources or direct coloring. Here isa surface colored with zgrayscale shading and no lighting.> plot3d( x*y^2/(x^2+y^4), x=-5..5,y=-5..5,> shading=zgrayscale, lightmodel=none );The same surface illuminated by lighting scheme light1 and noshading follows.> plot3d( x*y^2/(x^2+y^4), x=-5..5,y=-5..5,> shading=none, lightmodel=light1 );The plots appear in black and white in this book. Try them in Mapleto see the effects in color.4.3 AnimationGraphing is an excellent way to represent information. However, staticplots do not always emphasize certain graphical behavior, such as thedeformation of a bouncing ball, as effectively as their animated counterparts.