   1D perlin noise return value is not (-1, 1)?
  hi therewhy 1D perlin noise always generates values between (-0.5, 0.5)? shouldnt it be (-1, 1)? everytime my test program generates 1,000,000 noise outputs, and find the min and max values then noticed all test results are between (-0.5, 0.5). input value is a float which starts from 0 and step is 0.1.is it correct? thanks   
  well it just depends on how you implemented your perlin noise function.  it can return anything you implement it to return.  If you want it to return (-1,1) just multiply the result by 2.f.:-D   ;  it looks that i asked a silly question, :)the implementation is in its original form and from ken perlin's website.anyway, if i havnt tested it, i would still think its between (-1, 1)thanks for your quick reply.back to work.   