/* The CheckSpawn() function checks if a wild Pokemon battle will be triggered on this frame.
* It is only called when the player's StepCheck bit is true, so it is only called once every step. */
private void CheckSpawn()
{
/* This Random object will be needed for a lot of things later. */
Random r = new Random();
/* Each MapLayer in the map needs to be checked for a Tile with its Spawn bit set to true. */
foreach (MapLayer layer in world.CurrentMap.MapLayers)
{
/* If tile that the player is standing on in the layer has its Spawn bit set to true, a battle may happen. */
if (layer.GetTile(player.Sprite.TileLocation.X, player.Sprite.TileLocation.Y).Spawn)
{
/* This condition determines whether an actual battle happens or not.
* If a random double between 0 and 187.5 is less than the level's grass encounter rate, then a battle will happen.
* The most likely a battle can be to happen is a VeryCommon encounter rate, which is 10.0.
* With a VeryCommon encounter rate, the chance of a battle occurring is 10/187.5.
* The least likely a battle can be to happen is with a VeryRare encounter rate, which has a chance of 1.25/187.5.
* Note the the encounter rate is not how likely it is for a certain Pokemon to be battled - it is how likely that a battle will happen at all. */
if ((r.NextDouble() * 187.5) < World.CurrentLevel.GrassEncounterRate)
{
/* A new array of ProportionValue<PokemonSpawn> objects is created with the length of the GrassSpawns in the current level.
* GrassSpawns is a list of PokemonSpawn objects for the level's grass, stating what Pokemon at what level can be encountered.
* The spawns array is filled with ProportionValues created using the PokemonSpawn's Percentage property, and the PokemonSpawn object itself. */
ProportionValue <PokemonSpawn>[] spawns = new ProportionValue <PokemonSpawn> [World.CurrentLevel.GrassSpawns.Count];
for (int i = 0; i < spawns.Length; i++) // NOTE TO SELF: IT WOULD BE MORE EFFICIENT TO CREATE THE ARRAY IN A HIGHER SCOPE, SINCE IT IS PART OF THE LEVEL, BUT THIS WILL DO FOR NOW.
{
spawns[i] = ProportionValue.Create(World.CurrentLevel.GrassSpawns[i].Percentage, World.CurrentLevel.GrassSpawns[i]);
}
/* The encounter for the spawn is found proportionally from the array using ChooseByRandom().
* A new Pokemon object is created using the encounter data's ID, gender, and minimum/maximum levels.
* The wild Pokemon's level is chosen randomly between the minimum and maximum level in the selected PokemonSpawn.
* The moveset is currently just "Scratch". Although dynamic moveset generation is not part of the user requirements,
* I could add it if I have time by choosing the last four moves that the species can learn before it reaches its level. */
PokemonSpawn encounter = spawns.ChooseByRandom();
Pokemon p = new Pokemon(DataManager.PokemonSpecies[encounter.ID], Pokemon.GetGender(DataManager.PokemonSpecies[encounter.ID].GenderRatio), new[] { DataManager.Moves["Scratch"], null, null, null }, (byte)PkmnUtils.RandomInclusive(encounter.MinLevel, encounter.MaxLevel), null);
/* A wild battle is essentially a fight against an enemy team of one Pokemon.
* The BattleScreen.InitBattle() is called, which sends the player and enemy to the screen and sets the battle background index to zero.
* Finally, the BattleScreen is pushed on to the state stack. */
GameRef.BattleScreen.InitBattle(player.Team, p, 0);
Change(ChangeType.Push, GameRef.BattleScreen);
}
}
}
}
/* This method creates the WorldScreen's World. */
private void CreateWorld()
{
/* The commented out block of code here creates a test Beery item and adds it to the level.
* As it is not quite working and not in the user requirements, it is not being used. */
/* Berry testBerry = new Berry(BerryType.Razz);
* BaseSprite testBaseSprite = new BaseSprite(itemTexture, new Rectangle(64, 32, 32, 32), new Point(10, 10));
* ItemSprite testItemSprite = new ItemSprite(testBaseSprite, testBerry);
* level.Items.Add(testItemSprite); */
/* A new World object is created using references to the game and the window rectangle.
* Its list of Levels is set to DataManager.Levels (the master Level list).
* The starting level index is currently "Level 1" (the first area in the engine). */
World world = new World(GameRef, GameRef.ScreenRectangle);
world.Levels = DataManager.Levels;
world.CurrentLevelIndex = "Level 1";
/* The list of spawns for the first level is initialized.
* In the future, spawns may be editable in the level editor, but it's not a part of the user requirements.
* The two spawns added to the list mean that if a battle is triggered in the first level,
* there is a 50% chance it will be a Lv2-3 Caterpie, and a 50% chance it will be a Lv2-3 Metapod. */
List <PokemonSpawn> firstSpawns = new List <PokemonSpawn>();
PokemonSpawn spawn = new PokemonSpawn(0.5, 10, 2, 3);
firstSpawns.Add(spawn);
spawn = new PokemonSpawn(0.5, 11, 2, 3);
firstSpawns.Add(spawn);
/* The second level's spawn list has two entries.
* There is a three quarter chance of encountering a Pidgey between Lv4-5.
* There is a quarter chance of encountering a Pidgeotto between Lv4-5. */
List <PokemonSpawn> secondSpawns = new List <PokemonSpawn>();
spawn = new PokemonSpawn(0.75, 16, 4, 5);
secondSpawns.Add(spawn);
spawn = new PokemonSpawn(0.25, 17, 4, 5);
secondSpawns.Add(spawn);
/* There are three PokemonSpawn objects in the third level's list.
* 60% of the time, the player will run into a Lv6-7 Abra.
* 30% of the time, the player will run into a Lv6-7 Kadabra.
* 10% of the time, the player will run into a Lv6-7 Alakazam. */
List <PokemonSpawn> thirdSpawns = new List <PokemonSpawn>();
spawn = new PokemonSpawn(0.6, 63, 6, 7);
thirdSpawns.Add(spawn);
spawn = new PokemonSpawn(0.3, 64, 6, 7);
thirdSpawns.Add(spawn);
spawn = new PokemonSpawn(0.1, 65, 6, 7);
thirdSpawns.Add(spawn);
/* The spawns are added to the correct levels, as well as an encounter rate of VeryCommon.
* The WorldScreen.World is then set to the World that was just created. */
world.Levels["Level 1"].GrassSpawns = firstSpawns;
world.Levels["Level 1"].GrassEncounterRate = EncounterRate.VeryCommon;
world.Levels["Level 2"].GrassSpawns = secondSpawns;
world.Levels["Level 2"].GrassEncounterRate = EncounterRate.VeryCommon;
world.Levels["Level 3"].GrassSpawns = thirdSpawns;
world.Levels["Level 3"].GrassEncounterRate = EncounterRate.VeryCommon;
WorldScreen.World = world;
}
