From e933fb3639329a40576b2878344d647fe42218cb Mon Sep 17 00:00:00 2001
From: pikalaxalt <PikalaxALT@gmail.com>
Date: Wed, 25 May 2016 10:20:45 -0400
Subject: More pikachu engine stuff

---
 macros.asm | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'macros.asm')

diff --git a/macros.asm b/macros.asm
index f153e379..969d9465 100644
--- a/macros.asm
+++ b/macros.asm
@@ -758,3 +758,14 @@ ENDC
 	endr
 	db x
 ENDM
+
+sine_wave: MACRO
+; \1: amplitude
+
+x = 0
+	rept $20
+	; Round up.
+	dw (sin(x) + (sin(x) & $ff)) >> 8
+x = x + (\1) * $40000
+	endr
+ENDM
-- 
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