From ee32ff009d7f52df463d471ef0cbb5a4a7a48388 Mon Sep 17 00:00:00 2001
From: Sawakita <sawakitanoodles@gmail.com>
Date: Wed, 4 Jan 2012 00:25:21 +0100
Subject: Add macro for 'Event Displacement' and 'Fly-Warp' formula.

hg-commit-id: 70445835998b
---
 constants.asm | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/constants.asm b/constants.asm
index 1dd556cb..8e2abd2f 100644
--- a/constants.asm
+++ b/constants.asm
@@ -6,6 +6,20 @@ FuncCoord: MACRO
 Coord = $C3A0 + 20 * \2 + \1
 	ENDM
 
+;\1 = Map Width
+;\2 = Rows above (Y-blocks)
+;\3 = X movement (X-blocks)
+EVENT_DISP: MACRO
+	dw ($C6EF + (\1) + ((\1) + 6) * ((\2) >> 1) + ((\3) >> 1)) ; Ev.Disp
+	db \2,\3	;Y,X
+	ENDM
+
+FLYWARP_DATA: MACRO
+	EVENT_DISP \1,\2,\3
+	db ((\2) & $01)	;sub-block Y
+	db ((\3) & $01)	;sub-block X
+	ENDM
+        
 ; external map entry macro
 EMAP: MACRO ; emap x-coordinate,y-coordinate,textpointer
 ; the appearance of towns and routes in the town map, indexed by map id
-- 
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