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Phoenix
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Iterating edges of a polygon25th February 2010 This is neat and trivial trick I found the other day which is useful when you want to iterate through consecutive pairs of vertices (edges) of a polygon. [tt]i[/tt] is the index of the first vertex, and [tt]j[/tt] is the index of the following vertex. [co*snip* |
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Phoenix
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Fast inverse square root29th June 2009 Found this while browsing about the net, and I thought it could be useful (or at least an interesting read). Lengthy explanation, for the mathematically inclined. [code] float InvSqrt(float x){ float xhalf = 0.5f * x; int i = *(int*)&x; // st*snip* |
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Phoenix
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Find powers of two1st May 2008 Took me quite a while to figure out how to do find out if a number is a power of two without having lots of bells and whistles. Not sure if it's the fastest way, but it sure is small. [code] bool Po2(int n) { return n <= 0 ? false : (((n-1) & n*snip* |
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Phoenix
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3D in 2D Cube20th March 2008 A classical and simple 3D effect made in 2D |
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Phoenix
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Sine Lines12th December 2006 An old effect I found on my computer |
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