FF7/Field/Script/Opcodes/D4 SIN

0xD4	B1 / B2	B3 / B4	D	M	A	S

const Bit[4] B1: Destination bank.
const Bit[4] B2: Bank to retrieve M, or zero if M is specified as a literal value.
const Bit[4] B3: Bank to retrieve A, or zero if A is specified as a literal value.
const Bit[4] B4: Bank to retrieve S, or zero if S is specified as a literal value.
const UByte D: Destination address.
const UByte M: Multiplicand, or address to retrieve value if B2 is non-zero.
const UByte A: Addition, or address to retrieve value if B3 is non-zero.
const UByte S: Variable for sin angle, or source address to retrieve value if B4 is non-zero.

Var[B1][D] = ( ( Math.sin(Var[B4][S]) * M) + A) >> 12

Creates a variable from the another variable, with SIN, a multiplicand and an addition factor

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