[Reverse-engineering] [th01] Reimu's X position

13 copies of the clamping branches… Quality.

Part of P0096, funded by Ember2528.

Makefile.mak

@@ -59,7 +59,7 @@ bin\th01\op.exe: bin\piloadc.obj bin\th01\op.obj th01\op_01.cpp th01\op_02.c th0
 $**
 |
 
-bin\th01\reiiden.exe: bin\piloadc.obj bin\th01\reiiden.obj th01\main_01.cpp th01\main_02.c th01\main_03.c th01\main_04.c th01\main_05.c th01\main_06.cpp th01\main_07.cpp th01\main_08.cpp th01\main_12.c th01\main_13.cpp th01\main_13_.c th01\main_14.c th01\main_16.c th01\main_19.cpp th01\main_25.cpp th01\main_38.cpp
+bin\th01\reiiden.exe: bin\piloadc.obj bin\th01\reiiden.obj th01\main_01.cpp th01\main_02.c th01\main_03.c th01\main_04.c th01\main_05.c th01\main_06.cpp th01\main_07.cpp th01\main_08.cpp th01\main_12.c th01\main_13.cpp th01\main_13_.c th01\main_14.c th01\main_16.c th01\main_19.cpp th01\main_25.cpp th01\main_27.cpp th01\main_38.cpp
 	$(CC) $(CFLAGS) -ml -3 -DGAME=1 -DBINARY='M' -nbin\th01\ -eREIIDEN.EXE @&&|
 $**
 |

th01/main/player/move.cpp

@@ -0,0 +1,12 @@
+#include "th01/main/playfld.hpp"
+#include "th01/main/player/player.hpp"
+
+void player_move_and_clamp(int delta)
+{
+	player_left += delta;
+	if(player_left < PLAYER_LEFT_MIN) {
+		player_left = PLAYER_LEFT_MIN;
+	} else if(player_left >= PLAYER_LEFT_MAX) {
+		player_left = PLAYER_LEFT_MAX;
+	}
+}

th01/main/player/player.hpp

@@ -0,0 +1,10 @@
+static const int PLAYER_W = 32;
+
+static const int PLAYER_LEFT_MIN = (PLAYFIELD_LEFT);
+static const int PLAYER_LEFT_MAX = (PLAYFIELD_RIGHT - PLAYER_W);
+
+static const int PLAYER_LEFT_START = (PLAYFIELD_CENTER - (PLAYER_W / 2));
+
+extern int player_left;
+
+void player_move_and_clamp(int delta);

th01/main/player/player[bss].asm

@@ -0,0 +1,10 @@
+PLAYER_W = 32
+
+PLAYER_LEFT_MIN = (PLAYFIELD_LEFT)
+PLAYER_LEFT_MAX = (PLAYFIELD_RIGHT - PLAYER_W)
+
+PLAYER_LEFT_START = (PLAYFIELD_CENTER - (PLAYER_W / 2))
+
+public _PLAYER_INVINCIBILITY_TIME, _player_left
+_player_invincibility_time	dw ?
+_player_left	dw ?

th01/main/playfld.hpp

@@ -0,0 +1,5 @@
+static const int PLAYFIELD_LEFT = 0;
+static const int PLAYFIELD_RIGHT = RES_X;
+static const int PLAYFIELD_CENTER = (
+	((PLAYFIELD_RIGHT - PLAYFIELD_LEFT) / 2) + PLAYFIELD_LEFT
+);

th01/main/playfld.inc

@@ -0,0 +1,3 @@
+PLAYFIELD_LEFT = 0
+PLAYFIELD_RIGHT = RES_X
+PLAYFIELD_CENTER = (((PLAYFIELD_RIGHT - PLAYFIELD_LEFT) / 2) + PLAYFIELD_LEFT)

th01/main_27.cpp

@@ -0,0 +1,12 @@
+/* ReC98
+ * -----
+ * Code segment #27 of TH01's REIIDEN.EXE
+ */
+
+extern "C" {
+#include "platform.h"
+#include "pc98.h"
+
+#include "th01/main/player/move.cpp"
+
+}