tr2: port FallingBlock_Ceiling

LostArtefacts · Nov 14, 2024 · 31b05f8 · 31b05f8
1 parent 9781f15
commit 31b05f8
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Showing 6 changed files with 24 additions and 10 deletions.
diff --git a/docs/tr2/progress.svg b/docs/tr2/progress.svg
diff --git a/docs/tr2/progress.txt b/docs/tr2/progress.txt
@@ -3768,7 +3768,7 @@ typedef enum {
 0x004423F0  0x010A  -       void __cdecl Pendulum_Control(int16_t item_num);
 0x00442500  0x0105  +       void __cdecl FallingBlock_Control(int16_t item_num);
 0x00442610  0x003E  +       void __cdecl FallingBlock_Floor(const ITEM *item, int32_t x, int32_t y, int32_t z, int32_t *out_height);
-0x00442650  0x0044  -       void __cdecl FallingBlock_Ceiling(const ITEM *item, int32_t x, int32_t y, int32_t z, int32_t *out_height);
+0x00442650  0x0044  +       void __cdecl FallingBlock_Ceiling(const ITEM *item, int32_t x, int32_t y, int32_t z, int32_t *out_height);
 0x004426A0  0x00BD  -       void __cdecl TeethTrap_Control(int16_t item_num);
 0x00442760  0x00E0  -       void __cdecl FallingCeiling_Control(int16_t item_num);
 0x00442840  0x013E  -       void __cdecl DartEmitter_Control(int16_t item_num);

diff --git a/src/tr2/game/objects/traps/falling_block.c b/src/tr2/game/objects/traps/falling_block.c
@@ -73,3 +73,15 @@ void __cdecl FallingBlock_Floor(
         *out_height = item->pos.y - origin;
     }
 }
+
+void __cdecl FallingBlock_Ceiling(
+    const ITEM *const item, const int32_t x, const int32_t y, const int32_t z,
+    int32_t *const out_height)
+{
+    const int32_t origin = M_GetOrigin(item->object_id);
+    if (y > item->pos.y - origin
+        && (item->current_anim_state == TRAP_SET
+            || item->current_anim_state == TRAP_ACTIVATE)) {
+        *out_height = item->pos.y - origin + STEP_L;
+    }
+}
diff --git a/src/tr2/game/objects/traps/falling_block.h b/src/tr2/game/objects/traps/falling_block.h
@@ -5,3 +5,5 @@
 void __cdecl FallingBlock_Control(int16_t item_num);
 void __cdecl FallingBlock_Floor(
     const ITEM *item, int32_t x, int32_t y, int32_t z, int32_t *out_height);
+void __cdecl FallingBlock_Ceiling(
+    const ITEM *item, int32_t x, int32_t y, int32_t z, int32_t *out_height);
diff --git a/src/tr2/global/funcs.h b/src/tr2/global/funcs.h
@@ -128,7 +128,6 @@
 #define SpringBoard_Control ((void __cdecl (*)(int16_t item_num))0x00441A50)
 #define Spike_Collision ((void __cdecl (*)(int16_t item_num, ITEM *litem, COLL_INFO *coll))0x00442110)
 #define Pendulum_Control ((void __cdecl (*)(int16_t item_num))0x004423F0)
-#define FallingBlock_Ceiling ((void __cdecl (*)(const ITEM *item, int32_t x, int32_t y, int32_t z, int32_t *out_height))0x00442650)
 #define TeethTrap_Control ((void __cdecl (*)(int16_t item_num))0x004426A0)
 #define FallingCeiling_Control ((void __cdecl (*)(int16_t item_num))0x00442760)
 #define DartEmitter_Control ((void __cdecl (*)(int16_t item_num))0x00442840)

diff --git a/src/tr2/inject_exec.c b/src/tr2/inject_exec.c
@@ -1138,6 +1138,7 @@ static void M_Objects(const bool enable)
     INJECT(enable, 0x00442340, Trapdoor_IsItemOnTop);
     INJECT(enable, 0x00442500, FallingBlock_Control);
     INJECT(enable, 0x00442610, FallingBlock_Floor);
+    INJECT(enable, 0x00442650, FallingBlock_Ceiling);
     INJECT(enable, 0x00442B30, FlameEmitter_Control);
     INJECT(enable, 0x00442BC0, Flame_Control);
     INJECT(enable, 0x00442E70, EmberEmitter_Control);