Comparing doubles to 0
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I know this is a big no no with floats because of precision, but do doubles overcome this? i am doing some code review of some really horrible code and am dealing with this:
if( point.x == 0.0 && point.y == 0.0 && point.z == 0.0)
// do this
there are many errors and a total lack of coding standars this jackass delivered to me, so it matters little but for my own personal peace of mind i'd like to know.
doubles have the most of the same problems floats have, they are just alot
more tolerant. you should always use an epsilon value to compare floats/doubles.
more tolerant. you should always use an epsilon value to compare floats/doubles.
Sorry, I'm afraid that using doubles doesn't magically solve the inability to accurately represtent certain values like 0.1, or the inaccuracy that comes accumulates when performing calculations.
If point is the result of some calculation, then you still need to compare them using an epsilon value, however the epsilon value can be significantly smaller, by many orders of magnitude in fact.
If point is the result of some calculation, then you still need to compare them using an epsilon value, however the epsilon value can be significantly smaller, by many orders of magnitude in fact.
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