Another ask when i set value R=0.5,y=0.5,z=-0.000
I notice line begin from gray arrows so i ask teacher physic and we test so find that:
Line begin from gray arrow not begin from [b]N[/b] i add button step for we test step by step and can watch lines more slowly
So prof my ask [b]when set value that i typing up line begin from gray arrows or must begin from [b]N[/b][/b]
I will attach image for applet by value that i set up and how he begin