Detailed Description

Fast 8-bit and 16-bit approximations of sin(x) and cos(x).

Don't use these approximations for calculating the trajectory of a rocket to Mars, but they're great for art projects and LED displays.

On Arduino/AVR, the 16-bit approximation is more than 10X faster than floating point sin(x) and cos(x), while the 8-bit approximation is more than 20X faster.

Collaboration diagram for Fast Trigonometry Functions:

const uint8_t	b_m16_interleave [] = {0, 49, 49, 41, 90, 27, 117, 10}
	Pre-calculated lookup table used in sin8() and cos8() functions.

LIB8STATIC int16_t	sin16_C (uint16_t theta)
	Fast 16-bit approximation of sin(x).

LIB8STATIC int16_t	cos16 (uint16_t theta)
	Fast 16-bit approximation of cos(x).

LIB8STATIC uint8_t	sin8_C (uint8_t theta)
	Fast 8-bit approximation of sin(x).

LIB8STATIC uint8_t	cos8 (uint8_t theta)
	Fast 8-bit approximation of cos(x).

#define	sin16 sin16_C
	Platform-independent alias of the fast sin implementation.

#define	sin8 sin8_C
	Platform-independent alias of the fast sin implementation.