;;; $82A5: Instruction - calculate direction towards Samus ;;;
{
;; Parameters:
;;     X: Enemy projectile index

; Used only by eye door projectile
$86:82A5 5A          PHY
$86:82A6 AD F6 0A    LDA $0AF6  [$7E:0AF6]  ;\
$86:82A9 38          SEC                    ;|
$86:82AA FD 4B 1A    SBC $1A4B,x[$7E:1A6D]  ;|
$86:82AD 85 12       STA $12    [$7E:0012]  ;|
$86:82AF AD FA 0A    LDA $0AFA  [$7E:0AFA]  ;} A = (angle from enemy projectile to Samus)
$86:82B2 38          SEC                    ;|
$86:82B3 FD 93 1A    SBC $1A93,x[$7E:1AB5]  ;|
$86:82B6 85 14       STA $14    [$7E:0014]  ;|
$86:82B8 22 AE C0 A0 JSL $A0C0AE[$A0:C0AE]  ;/
$86:82BC 0A          ASL A                  ;\
$86:82BD AC 91 19    LDY $1991  [$7E:1991]  ;} Enemy projectile angle to Samus = [A] * 2 (angle * 2)
$86:82C0 99 FF 1A    STA $1AFF,y[$7E:1B21]  ;/
$86:82C3 AA          TAX                    ;\
$86:82C4 BF 43 B4 A0 LDA $A0B443,x[$A0:B5B3];} Enemy projectile X velocity = sin([A] * pi / 80h)
$86:82C8 99 B7 1A    STA $1AB7,y[$7E:1AD9]  ;/
$86:82CB BF C3 B3 A0 LDA $A0B3C3,x[$A0:B533];\
$86:82CF 99 DB 1A    STA $1ADB,y[$7E:1AFD]  ;} Enemy projectile Y velocity = -cos([A] * pi / 80h)
$86:82D2 BB          TYX
$86:82D3 7A          PLY
$86:82D4 60          RTS
}