Created Spawn Invisible Player (markdown)

Spawn-Invisible-Player.md

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+## Spawn Invisible Player
+
+credits to ghoulslash
+
+This feature allows us to spawn the player object as invisible after a warp, which can be useful for cutscenes, etc. Note that the camera will still be centered on the player.
+
+## Define a flag
+
+We'll use a flag to toggle whether or not we want to spawn the player as an invisible object. Open up [include/constants/flags.h](../blob/master/include/constants/flags.h) and either add or replace a flag with the following: `FLAG_SPAWN_INVISIBLE`
+
+## Make the flag functional
+
+1. Open [src/field_player_avatar.c](../blob/master/src/field_player_avatar.c) and find the function `InitPlayerAvatar`. Add the following to the end of the function:
+```c
+if (FlagGet(FLAG_SPAWN_INVISIBLE))
+{
+    FlagClear(FLAG_SPAWN_INVISIBLE);
+    objectEvent->invisible = TRUE;
+}
+```
+
+## Use the flag
+
+Now, we can use this in a script as so:
+```
+EventScript_SetupCutscene::
+    lock
+    setflag FLAG_SPAWN_INVISIBLE
+    warp MAP_PETALBURG_CITY, -1, 30, 40
+    release
+    end
+```
+
+And you would need to then add a map script to run your cutscene in petalburg city.
+
+When you want the player to appear again, you must use the `applymovement` command that includes a `set_visible` movement command.