1. Re: Math Shortcuts
- Posted by Arthur Adamson <euclid at ISOC.NET> Jul 04, 1998
- 434 views
>what if: >Xdis = floor(x2-x1) >Xdis = power(Xdis,2) >--now in theory, Xdis _should_ be 'integer', ie: >--Xdis should have no 'real' or fractional part >Ydis = floor(y2-y1) >Xdis = power(Ydis,2) >--Zdis = power(floor(z2-z1),2) >DIS = SQRT( Xdis + Ydis ) -- + Zdis Speed demons, note!!! floor() is not fast. On my pentium, one million ops for: o1 = floor(34.56) 2.42 seconds vs o1 = sqrt(34.56) 1.54 " vs Arthur P. Adamson, The Engine Man, euclid at isoc.net