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sine test

Started by andy_s_1 Mar 8, 2007 at 5:09 AM 2 replies 700+ views

Original Post

Mar 8, 2007 at 5:09 AM

what is the easiest way to set up a sine test for my integration methods? im usure where to attatch the sine function to and what to actually input as the sine value? lets say for using basic euler integration where v' = v + a; and x' = x + v'; should a = sin(time)? i just seem to get bland results that do not look correct!

JohnBolton

132

JohnBolton

Mar 9, 2007 at 12:28 AM

That looks right except perhaps the equations should be:

    v' = v + a * time;    x' = x + v' * time;

Also, keep in mind that Euler is not particularly accurate. Try smaller time steps.

andy_s_1

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andy_s_1

Mar 9, 2007 at 4:00 AM

yeah i am trying to demonstrate eulers inaccuracies compared with mine.

whne you say a+time do you mean the change in time (delta time)?

JohnBolton

132

JohnBolton

Mar 9, 2007 at 8:13 PM

Quote:
Original post by andy_s_1
whne you say a+time do you mean the change in time (delta time)?

Yes, sorry. I misread your post. time is delta time.

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