impl some spells and create `info.cc`

1 files changed, 97 insertions, 0 deletions

diff --git a/src/info.cc b/src/info.cc
new file mode 100644
index 0000000..7105535
--- /dev/null
+++ b/src/info.cc
@@ -0,0 +1,97 @@
+#include "info.hh"
+#include "creature.hh"
+
+#include "stubs.hh"
+
+bool JumpPossible(int x, int y, int z, bool AvoidPlayers){
+	bool HasBank = false;
+	Object Obj = GetFirstObject(x, y, z);
+	while(Obj != NONE){
+		ObjectType ObjType = Obj.getObjectType();
+
+		if(ObjType.getFlag(BANK)){
+			HasBank = true;
+		}
+
+		if(ObjType.getFlag(UNPASS) && ObjType.getFlag(UNMOVE)){
+			return false;
+		}
+
+		if(AvoidPlayers && ObjType.isCreatureContainer()){
+			TCreature *Creature = GetCreature(Obj);
+			if(Creature != NULL && Creature->Type == PLAYER){
+				return false;
+			}
+		}
+
+		Obj = Obj.getNextObject();
+	}
+	return HasBank;
+}
+
+bool SearchFreeField(int *x, int *y, int *z, int Distance, uint16 HouseID, bool Jump){
+	int OffsetX = 0;
+	int OffsetY = 0;
+	int CurrentDistance = 0;
+	int CurrentDirection = DIRECTION_EAST;
+	while(CurrentDistance <= Distance){
+		int FieldX = *x + OffsetX;
+		int FieldY = *y + OffsetY;
+		int FieldZ = *z;
+
+		// TODO(fusion): This is probably some form of the `TCreature::MovePossible`
+		// function inlined.
+		bool MovePossible;
+		if(Jump){
+			MovePossible = JumpPossible(FieldX, FieldY, FieldZ, true);
+		}else{
+			MovePossible = CoordinateFlag(FieldX, FieldY, FieldZ, BANK)
+					&& !CoordinateFlag(FieldX, FieldY, FieldZ, UNPASS);
+
+			// TODO(fusion): This one I'm not so sure.
+			if(MovePossible && CoordinateFlag(FieldX, FieldY, FieldZ, AVOID)){
+				MovePossible = CoordinateFlag(FieldX, FieldY, FieldZ, BED);
+			}
+		}
+
+		if(MovePossible){
+			if(HouseID == HOUSEID_ANY || !IsHouse(FieldX, FieldY, FieldZ)
+			|| (HouseID != 0 && HouseID == GetHouseID(FieldX, FieldY, FieldZ))){
+				*x = FieldX;
+				*y = FieldY;
+				return true;
+			}
+		}
+
+
+		// NOTE(fusion): We're spiraling out from the initial coordinate.
+		// TODO(fusion): This function used directions different from the ones
+		// used by creatures and defined in `enums.hh` so I made it use them
+		// instead, LOL.
+		if(CurrentDirection == DIRECTION_NORTH){
+			OffsetY -= 1;
+			if(OffsetY <= -CurrentDistance){
+				CurrentDirection = DIRECTION_WEST;
+			}
+		}else if(CurrentDirection == DIRECTION_WEST){
+			OffsetX -= 1;
+			if(OffsetX <= -CurrentDistance){
+				CurrentDirection = DIRECTION_SOUTH;
+			}
+		}else if(CurrentDirection == DIRECTION_SOUTH){
+			OffsetY += 1;
+			if(OffsetY >= CurrentDistance){
+				CurrentDirection = DIRECTION_EAST;
+			}
+		}else{
+			ASSERT(CurrentDirection == DIRECTION_EAST);
+			OffsetX += 1;
+			if(OffsetX > CurrentDistance){
+				CurrentDistance = OffsetX;
+				CurrentDirection = DIRECTION_NORTH;
+			}
+		}
+	}
+
+	return false;
+}