@param n0 The first value.
@param n1 The second value.
@param a The alpha value.
@returns The interpolated value.
The alpha value should range from 0.0 to 1.0. If the alpha value is
0.0, this function returns @a n0. If the alpha value is 1.0, this
function returns @a n1.
Performs linear interpolation between two values.
@param n0 The first value. @param n1 The second value. @param a The alpha value.
@returns The interpolated value.
The alpha value should range from 0.0 to 1.0. If the alpha value is 0.0, this function returns @a n0. If the alpha value is 1.0, this function returns @a n1.