math_table.c File Reference

Go to the source code of this file.

Variables
const u16	gMath_SinQuarter [256]
	A quarter-wave sine table, scaled by 65536.
const u16	gMath_TwoPiSteps [8]
	floor(i * 2π)
const s32	gMath_QuadrantSin [4]
	The sine at 0, 90, 180 and 270 degrees, in Q16.
const u16	gMath_TanTable [258]
	Tangents scaled by 256: index i is tan(i * 45 / 128 degrees), so index 128 is tan(45 degrees).

Variable Documentation

gMath_SinQuarter

const u16 gMath_SinQuarter[256]

A quarter-wave sine table, scaled by 65536.

Definition at line 7 of file math_table.c.

gMath_TwoPiSteps

const u16 gMath_TwoPiSteps[8]

Initial value:

                           = {
    0, 6, 12, 18, 25, 31, 37, 43,
}

floor(i * 2π)

Definition at line 43 of file math_table.c.

gMath_QuadrantSin

const s32 gMath_QuadrantSin[4]

Initial value:

                            = {
    0, 65536, 0, -65536,
}

The sine at 0, 90, 180 and 270 degrees, in Q16.

Definition at line 48 of file math_table.c.

gMath_TanTable

const u16 gMath_TanTable[258]

Tangents scaled by 256: index i is tan(i * 45 / 128 degrees), so index 128 is tan(45 degrees).

ArcTan2 starts its binary search at index 127.

Definition at line 55 of file math_table.c.

Referenced by ArcTan2().