For the most convincing look, assume the light source to be at the top left of the page - the shadow should simply be a thick grey line along the bottom and up the right edge of your shape.
为了更好看，在页面的左上方加上光源-阴影应该是沿着你形状的右边缘的上部和底部勾勒出粗的灰线条。
2
A shadowof the bat's impact zone is shown so you can line up your swing.
球棒的击球区会显示出阴影，让你可以对准了挥棒。
3
Now enable some user feedback based on the loading of the shadow dynamics file at line 1379.