1 files changed, 63 insertions, 0 deletions
diff --git a/src/field_ground_effect.c b/src/field_ground_effect.c
new file mode 100644
index 000000000..e4742d384
--- /dev/null
+++ b/src/field_ground_effect.c
@@ -0,0 +1,63 @@
+#include "global.h"
+#include "asm_fieldmap.h"
+
+void FieldObjectUpdateMetatileBehaviors(struct MapObject *);
+void GetGroundEffectFlags_Reflection(struct MapObject *, u32 *);
+void GetGroundEffectFlags_TallGrassOnSpawn(struct MapObject *, u32 *);
+void GetGroundEffectFlags_TallGrassOnBeginStep(struct MapObject *, u32 *);
+void GetGroundEffectFlags_LongGrassOnSpawn(struct MapObject *, u32 *);
+void GetGroundEffectFlags_LongGrassOnBeginStep(struct MapObject *, u32 *);
+void GetGroundEffectFlags_Tracks(struct MapObject *, u32 *);
+void GetGroundEffectFlags_SandHeap(struct MapObject *, u32 *);
+void GetGroundEffectFlags_ShallowFlowingWater(struct MapObject *, u32 *);
+void GetGroundEffectFlags_Puddle(struct MapObject *, u32 *);
+void GetGroundEffectFlags_Ripple(struct MapObject *, u32 *);
+void GetGroundEffectFlags_ShortGrass(struct MapObject *, u32 *);
+void GetGroundEffectFlags_HotSprings(struct MapObject *, u32 *);
+void GetGroundEffectFlags_Seaweed(struct MapObject *, u32 *);
+void GetGroundEffectFlags_JumpLanding(struct MapObject *, u32 *);
+
+void GetAllGroundEffectFlags_OnSpawn(struct MapObject *mapObj, u32 *flags)
+{
+    FieldObjectUpdateMetatileBehaviors(mapObj);
+    GetGroundEffectFlags_Reflection(mapObj, flags);
+    GetGroundEffectFlags_TallGrassOnSpawn(mapObj, flags);
+    GetGroundEffectFlags_LongGrassOnSpawn(mapObj, flags);
+    GetGroundEffectFlags_SandHeap(mapObj, flags);
+    GetGroundEffectFlags_ShallowFlowingWater(mapObj, flags);
+    GetGroundEffectFlags_ShortGrass(mapObj, flags);
+    GetGroundEffectFlags_HotSprings(mapObj, flags);
+}
+
+void GetAllGroundEffectFlags_OnBeginStep(struct MapObject *mapObj, u32 *flags)
+{
+    FieldObjectUpdateMetatileBehaviors(mapObj);
+    GetGroundEffectFlags_Reflection(mapObj, flags);
+    GetGroundEffectFlags_TallGrassOnBeginStep(mapObj, flags);
+    GetGroundEffectFlags_LongGrassOnBeginStep(mapObj, flags);
+    GetGroundEffectFlags_Tracks(mapObj, flags);
+    GetGroundEffectFlags_SandHeap(mapObj, flags);
+    GetGroundEffectFlags_ShallowFlowingWater(mapObj, flags);
+    GetGroundEffectFlags_Puddle(mapObj, flags);
+    GetGroundEffectFlags_ShortGrass(mapObj, flags);
+    GetGroundEffectFlags_HotSprings(mapObj, flags);
+}
+
+void GetAllGroundEffectFlags_OnFinishStep(struct MapObject *mapObj, u32 *flags)
+{
+    FieldObjectUpdateMetatileBehaviors(mapObj);
+    GetGroundEffectFlags_ShallowFlowingWater(mapObj, flags);
+    GetGroundEffectFlags_SandHeap(mapObj, flags);
+    GetGroundEffectFlags_Puddle(mapObj, flags);
+    GetGroundEffectFlags_Ripple(mapObj, flags);
+    GetGroundEffectFlags_ShortGrass(mapObj, flags);
+    GetGroundEffectFlags_HotSprings(mapObj, flags);
+    GetGroundEffectFlags_Seaweed(mapObj, flags);
+    GetGroundEffectFlags_JumpLanding(mapObj, flags);
+}
+
+void FieldObjectUpdateMetatileBehaviors(struct MapObject *mapObj)
+{
+    mapObj->mapobj_unk_1F = MapGridGetMetatileBehaviorAt(mapObj->coords3.x, mapObj->coords3.y);
+    mapObj->mapobj_unk_1E = MapGridGetMetatileBehaviorAt(mapObj->coords2.x, mapObj->coords2.y);
+}