Krakout: Ball velocity vectors by heading

A594: Ball velocity vectors by heading

One row per heading code, from $48 at due right, then counterclockwise. Three bytes per heading.

Offset	Field	What it holds
+0	X step threshold	sub-pixel units per on-screen X step, so smaller is faster
+1	Y step threshold	the same, on the Y axis
+2	Direction signs	bit 4 set for right, bit 0 set for down

A zero threshold stops all steps on that axis.

velocity_table

A594

DEFB $05,$00,$10

0°, due right – a principal heading

A597

DEFB $05,$43,$10

4°, up-right

A59A

DEFB $05,$24,$10

8°, up-right

A59D

DEFB $05,$17,$10

12°, up-right

A5A0

DEFB $06,$12,$10

18°, up-right

A5A3

DEFB $06,$0E,$10

23°, up-right

A5A6

DEFB $06,$0C,$10

27°, up-right

A5A9

DEFB $06,$0B,$10

29°, up-right

A5AC

DEFB $07,$0A,$10

35°, up-right

A5AF

DEFB $07,$08,$10

41°, up-right diagonal – a principal heading

A5B2

DEFB $08,$08,$10

45°, up-right

A5B5

DEFB $09,$07,$10

52°, up-right

A5B8

DEFB $0A,$07,$10

55°, up-right

A5BB

DEFB $0C,$07,$10

60°, up-right

A5BE

DEFB $0F,$07,$10

65°, up-right

A5C1

DEFB $13,$06,$10

72°, up-right

A5C4

DEFB $1E,$06,$10

79°, up-right

A5C7

DEFB $38,$06,$10

84°, up-right

A5CA

DEFB $00,$06,$00

90°, straight up – a principal heading

A5CD

DEFB $38,$06,$00

96°, up-left

A5D0

DEFB $1E,$06,$00

101°, up-left

A5D3

DEFB $13,$06,$00

108°, up-left

A5D6

DEFB $0F,$07,$00

115°, up-left

A5D9

DEFB $0C,$07,$00

120°, up-left

A5DC

DEFB $0A,$07,$00

125°, up-left

A5DF

DEFB $09,$07,$00

128°, up-left

A5E2

DEFB $08,$08,$00

135°, up-left

A5E5

DEFB $07,$08,$00

139°, up-left diagonal – a principal heading

A5E8

DEFB $07,$0A,$00

145°, up-left

A5EB

DEFB $06,$0B,$00

151°, up-left

A5EE

DEFB $06,$0C,$00

153°, up-left

A5F1

DEFB $06,$0E,$00

157°, up-left

A5F4

DEFB $06,$12,$00

162°, up-left

A5F7

DEFB $05,$17,$00

168°, up-left

A5FA

DEFB $05,$24,$00

172°, up-left

A5FD

DEFB $05,$43,$00

176°, up-left

A600

DEFB $05,$00,$01

180°, due left – a principal heading

A603

DEFB $05,$43,$01

184°, down-left

A606

DEFB $05,$24,$01

188°, down-left

A609

DEFB $05,$17,$01

192°, down-left

A60C

DEFB $06,$12,$01

198°, down-left

A60F

DEFB $06,$0E,$01

203°, down-left

A612

DEFB $06,$0C,$01

207°, down-left

A615

DEFB $06,$0B,$01

209°, down-left

A618

DEFB $07,$0A,$01

215°, down-left

A61B

DEFB $07,$08,$01

221°, down-left diagonal – a principal heading

A61E

DEFB $08,$08,$01

225°, down-left

A621

DEFB $09,$07,$01

232°, down-left

A624

DEFB $0A,$07,$01

235°, down-left

A627

DEFB $0C,$07,$01

240°, down-left

A62A

DEFB $0F,$07,$01

245°, down-left

A62D

DEFB $13,$06,$01

252°, down-left

A630

DEFB $1E,$06,$01

259°, down-left

A633

DEFB $38,$06,$01

264°, down-left

A636

DEFB $00,$06,$11

270°, straight down – a principal heading

A639

DEFB $38,$06,$11

276°, down-right

A63C

DEFB $1E,$06,$11

281°, down-right

A63F

DEFB $13,$06,$11

288°, down-right

A642

DEFB $0F,$07,$11

295°, down-right

A645

DEFB $0C,$07,$11

300°, down-right

A648

DEFB $0A,$07,$11

305°, down-right

A64B

DEFB $09,$07,$11

308°, down-right

A64E

DEFB $08,$08,$11

315°, down-right

A651

DEFB $07,$08,$11

319°, down-right diagonal – a principal heading

A654

DEFB $07,$0A,$11

325°, down-right

A657

DEFB $06,$0B,$11

331°, down-right

A65A

DEFB $06,$0C,$11

333°, down-right

A65D

DEFB $06,$0E,$11

337°, down-right

A660

DEFB $06,$12,$11

342°, down-right

A663

DEFB $05,$17,$11

348°, down-right

A666

DEFB $05,$24,$11

352°, down-right

A669

DEFB $05,$43,$11

356°, down-right

Fork me on GitHub