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Wrong algorithm implementation #1

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long-nguyen opened this issue Sep 16, 2014 · 0 comments
Open

Wrong algorithm implementation #1

long-nguyen opened this issue Sep 16, 2014 · 0 comments

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@long-nguyen
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according to en.wikipedia.org/wiki/Even-odd_rule,
it should be:
if( (([[[polygon objectAtIndex:i] objectAtIndex:1] floatValue] > lat) != ([[[polygon objectAtIndex:j] objectAtIndex:1] floatValue] > lat)) && (lng < ( [[[polygon objectAtIndex:j] objectAtIndex:0] floatValue] - [[[polygon objectAtIndex:i] objectAtIndex:0] floatValue] ) * ( lat - [[[polygon objectAtIndex:i] objectAtIndex:1] floatValue] ) / ([[[polygon objectAtIndex:j] objectAtIndex:1] floatValue] - [[[polygon objectAtIndex:i] objectAtIndex:1] floatValue]) + [[[polygon objectAtIndex:i] objectAtIndex:0] floatValue] ) ){
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