From dd70d247ec64d68188ba28a2a25ee02de82f8d8c Mon Sep 17 00:00:00 2001
From: Teddy Wing
Date: Wed, 7 Oct 2015 02:45:32 -0400
Subject: Hitting enemies with missiles makes enemies disappear

When a missile hits an enemy, the enemy now disappears.

TODO:
* Add scoring
* Currently missiles don't stop when they hit an enemy so they'll just
  keep on killing enemies until they get to the edge of the board.
---
 autoload/space_vlaze/enemy.vim   | 13 +++++++++++++
 autoload/space_vlaze/missile.vim |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/autoload/space_vlaze/enemy.vim b/autoload/space_vlaze/enemy.vim
index 51bf14d..1fefbf5 100644
--- a/autoload/space_vlaze/enemy.vim
+++ b/autoload/space_vlaze/enemy.vim
@@ -51,3 +51,16 @@ function! space_vlaze#enemy#DropEnemyAtRandomCoordinates()
 	
 	call space_vlaze#game#SetBoardCell(y, x, space_vlaze#enemy#EnemyCharacter())
 endfunction
+
+
+" Calling this function tells us that coordinates y, x were hit by a missile.
+" If an enemy lives at y, x, it needs to disappear and update the score.
+function! space_vlaze#enemy#HandleEnemyHitAt(y, x)
+	if space_vlaze#game#IsWithinBoard(a:y, a:x)
+		if space_vlaze#game#BoardCell(a:y, a:x) ==# space_vlaze#enemy#EnemyCharacter()
+			call space_vlaze#game#ClearBoardCell(a:y, a:x)
+			
+			return 1
+		endif
+	endif
+endfunction
diff --git a/autoload/space_vlaze/missile.vim b/autoload/space_vlaze/missile.vim
index aa9da39..95f4e94 100644
--- a/autoload/space_vlaze/missile.vim
+++ b/autoload/space_vlaze/missile.vim
@@ -51,6 +51,8 @@ function! space_vlaze#missile#Move(y, x, direction)
 		call space_vlaze#game#RenderBoard()
 		
 		return 1
+	else
+		call space_vlaze#enemy#HandleEnemyHitAt(y, x)
 	endif
 	
 	return 0
-- 
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