Formula for converting angle to vector?
Hi guys
Basic game math help needed.
I need a formula to convert an angle in to (x, y).
For example 135 deg = (1, 1) and 90 = (1, 0)
Basic game math help needed.
I need a formula to convert an angle in to (x, y).
For example 135 deg = (1, 1) and 90 = (1, 0)
Code:
double XComponentOfVector( const double p_direction, const double p_magnitude )
{
return ( sin( p_direction ) * p_magnitude );
}
...and...
Code:
double YComponentOfVector( const double p_direction, const double p_magnitude )
{
return ( cos( p_direction ) * p_magnitude );
}
Mark Bishop

Student and freelance OS X & iOS developer
sin and cos are what you want. If your angles are in degrees, remember to convert to radians first. Also note that 135 degrees in your example will be {0.707106781186548, 0.707106781186548}, not {1, 1}; if you want square coordinates rather than circular ones, you'll need to do something like divide both numbers by the larger of the two.
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