[Reverse-engineering] [th02] Bombs: Particle sprites

The circle point sprite is technically identical to the pellet sprite,
but logically different.

Part of P0237, funded by Yanga.

Tupfile

@@ -71,6 +71,7 @@ BMP2ARR = bin\\Pipeline\\bmp2arr.exe
 : th01/sprites/pillar.bmp |> !bmp2arr -sym sPILLAR -of cpp -sw 32 -sh 8 |> th01/sprites/pillar.csp
 : th01/sprites/shape8x8.bmp |> !bmp2arr -sym sSHAPE8X8 -of cpp -sw 8 -sh 8 |> th01/sprites/shape8x8.csp
 : th01/sprites/bonusbox.bmp |> !bmp2arr -sym sSTAGEBONUS_BOX -of cpp -sw 8 -sh 4 |> th01/sprites/bonusbox.csp
+: th02/sprites/bombpart.bmp |> !bmp2arr -sym _sBOMB_PARTICLES -of asm -sw 8 -sh 8 |> th02/sprites/bombpart.asp
 : th02/sprites/pellet.bmp |> !bmp2arr -sym _sPELLET -of asm -sw 8 -sh 8 -pshf outer |> th02/sprites/pellet.asp
 : th02/sprites/sparks.bmp |> !bmp2arr -sym _sSPARKS -of asm -sw 8 -sh 8 -pshf outer |> th02/sprites/sparks.asp
 : th02/sprites/pointnum.bmp |> !bmp2arr -sym _sPOINTNUMS -of asm -sw 8 -sh 8 |> th02/sprites/pointnum.asp
@@ -102,6 +103,7 @@ BMP2ARR = bin\\Pipeline\\bmp2arr.exe
 : th02_zuninit.asm |> !as |> bin\\th02\\zuninit.obj
 : th02_op.asm |> !as |> bin\\th02\\op.obj
 : th02_main.asm | \
+	th02/sprites/bombpart.asp \
 	th02/sprites/pellet.asp \
 	th02/sprites/sparks.asp \
 	th02/sprites/pointnum.asp \

Tupfile.bat

@@ -14,6 +14,7 @@ bin\\Pipeline\\bmp2arr.exe -q -i th01/sprites/pellet_c.bmp -o th01/sprites/pelle
 bin\\Pipeline\\bmp2arr.exe -q -i th01/sprites/pillar.bmp -o th01/sprites/pillar.csp -sym sPILLAR -of cpp -sw 32 -sh 8
 bin\\Pipeline\\bmp2arr.exe -q -i th01/sprites/shape8x8.bmp -o th01/sprites/shape8x8.csp -sym sSHAPE8X8 -of cpp -sw 8 -sh 8
 bin\\Pipeline\\bmp2arr.exe -q -i th01/sprites/bonusbox.bmp -o th01/sprites/bonusbox.csp -sym sSTAGEBONUS_BOX -of cpp -sw 8 -sh 4
+bin\\Pipeline\\bmp2arr.exe -q -i th02/sprites/bombpart.bmp -o th02/sprites/bombpart.asp -sym _sBOMB_PARTICLES -of asm -sw 8 -sh 8
 bin\\Pipeline\\bmp2arr.exe -q -i th02/sprites/pellet.bmp -o th02/sprites/pellet.asp -sym _sPELLET -of asm -sw 8 -sh 8 -pshf outer
 bin\\Pipeline\\bmp2arr.exe -q -i th02/sprites/sparks.bmp -o th02/sprites/sparks.asp -sym _sSPARKS -of asm -sw 8 -sh 8 -pshf outer
 bin\\Pipeline\\bmp2arr.exe -q -i th02/sprites/pointnum.bmp -o th02/sprites/pointnum.asp -sym _sPOINTNUMS -of asm -sw 8 -sh 8

th02/sprites/bombpart.h

@@ -0,0 +1,10 @@
+#define BOMB_PARTICLE_W 8
+#define BOMB_PARTICLE_H 8
+static const int BOMB_PARTICLE_CELS = 4;
+
+typedef dots_t(BOMB_PARTICLE_W) bomb_particle_dots_t;
+
+extern const bomb_particle_dots_t sBOMB_PARTICLES[BOMB_PARTICLE_CELS + 1][
+	BOMB_PARTICLE_H
+];
+#define sBOMB_CIRCLE sBOMB_PARTICLES[BOMB_PARTICLE_CELS]

th02_main.asm

@@ -7178,7 +7178,7 @@ loc_ED47:
 		mov	[bp+var_4], bx
 		mov	dx, 10h
 		sub	dx, bx
-		mov	si, 0C92h
+		mov	si, offset _sBOMB_PARTICLES[4 * 8]
 		mov	[bp+var_1], 0
 
 loc_ED6E:
@@ -7240,7 +7240,7 @@ loc_EDBA:
 		shr	dx, 2
 		add	ax, dx
 		mov	di, ax
-		mov	si, 0C72h
+		mov	si, offset _sBOMB_PARTICLES
 		mov	ax, [bp+arg_0]
 		shl	ax, 3
 		add	si, ax
@@ -7291,7 +7291,7 @@ loc_EE0B:
 		shr	dx, 2
 		add	ax, dx
 		mov	di, ax
-		mov	si, 0C92h
+		mov	si, offset _sBOMB_PARTICLES[4 * 8]
 		add	si, 4
 		mov	cx, 4
 		mov	dx, 10h
@@ -32504,46 +32504,7 @@ aBomb3_pi	db 'bomb3.pi',0
 aBomb2_pi	db 'bomb2.pi',0
 aBomb1_bft	db 'bomb1.bft',0
 asc_1E6DF	db '  ',0
-		db    0
-		db    0
-		db    0
-		db  10h
-		db    0
-		db    0
-		db    0
-		db    0
-		db    0
-		db    0
-		db  10h
-		db  38h	; 8
-		db  10h
-		db    0
-		db    0
-		db    0
-		db    0
-		db  10h
-		db  10h
-		db  7Ch	; |
-		db  10h
-		db  10h
-		db    0
-		db    0
-		db  10h
-		db  10h
-		db  38h	; 8
-		db 0FEh
-		db  38h	; 8
-		db  10h
-		db  10h
-		db    0
-		db  3Ch	; <
-		db  7Eh	; ~
-		db 0FFh
-		db 0FFh
-		db 0FFh
-		db 0FFh
-		db  7Eh	; ~
-		db  3Ch	; <
+include th02/sprites/bombpart.asp
 include th02/sprites/sparks.asp
 public _spark_accel_x
 _spark_accel_x	dw 0