Web студия "GrandView"

Description

float acos ( float arg )

Returns the arc cosine of arg in radians. acos() is the complementary function of cos(), which means that a==cos(acos(a)) for every value of a that is within acos()' range.

See also: acosh(), asin(), and atan().

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acos

zoltan dot szentesi at nokia dot com
06-Aug-2006 03:29


Wondering what is the use of 'acos' function?



It is essential in games, animations and drawings to determine the location of two objects relating to each other.



To the point: the angle of two vectors is calculated by



           v1X*v2X + v1Y*v2Y

  acos(--------------------------)=angle between two vectors.

               |v1| * |v2|



 |v1| and |v2| are the length of the vectors and calculated using Pithagoras-formula: |v1|=sqrt(v1X*v1X + v1Y*v1Y)



This helped me to calculate and share given space for 'n' amount of objects so that they don't overlap.



Enjoy! :-)

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