returns the difference between two angles within -180 and 180 return values.

angle_difference(double src, double dest)

Returns: double

This function will return the difference between two input angles within -180 and 180. It is used to gather information to know which direction to rotate in the quickest way to get to a specific direction.

var driftAngle = angle_difference(direction, image_angle);
direction -= min(abs(image_angle), 15) * sign(driftAngle);

Above code will rotate an object's image angle towards its nearest current direction by an incremental method.

Back to Vectors