Bubbler: Routine at 9820

9820: Create Shot

Used by the routine at CreateSpawnedEntity.

Makes a shot at the spawn point. The shot is nudged on by three along both axes, given a random heading in the low four bits, and sent off with the moving flag set.

Input
IX	The shot

CreateShot

9820

CALL PlayBriefBuzz

Play the brief buzz.

9823

LD A,($5F9B)

Fetch a random number.

9826

AND %00001111

Keep a heading from 0 to 15.

9828

LD (IX+$20),A

Keep that heading aside.

982B

LD A,(IX+$03)

Nudge the low byte of the x coordinate on by three.

982E

ADD A,$03

9830

LD (IX+$03),A

9833

LD A,(IX+$06)

Nudge the low byte of the y coordinate on by three.

9836

ADD A,$03

9838

LD (IX+$06),A

983B

CALL SetUpShotSprite

Set up the shot sprite.

983E

CALL FacePlayer

Face the shot towards the player.

9841

LD A,(IX+$20)

Fetch the heading that was kept aside.

9844

OR %10000000

Mark the shot as moving.

9846

LD (IX+$11),A

Use that value as the heading.

9849

JP UpdateSpawnPoints_Advance

Go on to the next spawn point.