From c73f1e066ac9a94751477e344e1a15dc5924a717 Mon Sep 17 00:00:00 2001
From: Devine Lu Linvega <aliceffekt@gmail.com>
Date: Sun, 24 Mar 2024 10:46:24 -0700
Subject: [PATCH] (snake) Optimizations

---
 projects/examples/demos/snake.tal | 59 ++++++++++++++++---------------
 1 file changed, 30 insertions(+), 29 deletions(-)

diff --git a/projects/examples/demos/snake.tal b/projects/examples/demos/snake.tal
index 5504ac1..9fbf2a2 100644
--- a/projects/examples/demos/snake.tal
+++ b/projects/examples/demos/snake.tal
@@ -24,9 +24,9 @@
 	#00c8 .Screen/width DEO2
 	#0100 .Screen/height DEO2
 	( | set arena )
-	.Screen/width DEI2 #03 SFT2 NIP .arena/w STZ
-	.Screen/height DEI2 #03 SFT2 NIP .arena/h STZ
-	[ LIT2 01 -Screen/auto ] DEO
+	.Screen/width DEI2 #03 SFT2 .arena/w STZ
+	POP .Screen/height DEI2 #03 SFT2 .arena/h STZ
+	POP [ LIT2 01 -Screen/auto ] DEO
 	reset BRK
 
 @on-frame ( -> )
@@ -35,7 +35,7 @@
 	[ LIT2 00 _&f ] STR
 	#00 <draw-snake>
 	<move>
-	#02 .snake/dead LDZ ADD <draw-snake>
+	[ LIT2 02 -snake/dead ] LDZ ADD <draw-snake>
 	#83 <draw-apple>
 	<draw-score>
 	BRK
@@ -71,30 +71,29 @@
 		SWP2r
 		( push ) DUPk ADD .snake/tail ADD STH2r ROT STZ2
 		INC GTHk ?&>loop
-	POP2 POP2r .snake/dead LDZ #00 EQU JMP
-	JMP2r
-	.snake/direction LDZ DUP #01 NEQ ?&no-up
-	.snake/y LDZ #01 SUB .arena/h LDZ LTHk JMP
-	SWP POP .snake/y STZ
-	&no-up DUP #02 NEQ ?&no-down
-	.snake/y LDZ INC .arena/h LDZ DIVk MUL SUB .snake/y STZ
-	&no-down DUP #04 NEQ ?&no-left
-	.snake/x LDZ #01 SUB .arena/w LDZ LTHk JMP
-	SWP POP .snake/x STZ
-	&no-left DUP #08 NEQ ?&no-right
-	.snake/x LDZ INC .arena/w LDZ DIVk MUL SUB .snake/x STZ
-	&no-right POP
-	( detect collision with apple ) .snake/x LDZ2 .apple/x LDZ2 NEQ2 ?{
+	POP2 POP2r
+	( ) .snake/dead LDZ #00 [ EQU JMP JMP2r ]
+	( ) .snake/direction LDZ DUP #01 NEQ ?{
+		.snake/y LDZ #01 SUB .arena/h LDZ [ LTHk JMP SWP POP ] .snake/y STZ }
+	DUP #02 NEQ ?{
+		.snake/y LDZ INC .arena/h LDZ DIVk MUL SUB .snake/y STZ }
+	DUP #04 NEQ ?{
+		.snake/x LDZ #01 SUB .arena/w LDZ [ LTHk JMP SWP POP ] .snake/x STZ }
+	DUP #08 NEQ ?{
+		.snake/x LDZ INC .arena/w LDZ DIVk MUL SUB .snake/x STZ }
+	POP
+	( | detect collision with apple )
+	.snake/x LDZ2 .apple/x LDZ2 NEQ2 ?{
 		#00 <draw-apple>
 		.snake/length LDZ INC .snake/length STZ
 		<add-apple>
 		<move> }
 	.snake/length LDZ #01
-	&loop-body ( -- )
-	( pop ) DUPk ADD .snake/tail ADD LDZ2 .snake/x LDZ2 NEQ2 ?{
-		#01 .snake/dead STZ
-		#03 <draw-snake> }
-	INC GTHk ?&loop-body
+	&>loop-body ( -- )
+		DUPk ADD .snake/tail ADD LDZ2 .snake/x LDZ2 NEQ2 ?{
+			[ LIT2 01 -snake/dead ] STZ
+			#03 <draw-snake> }
+		INC GTHk ?&>loop-body
 	POP2 JMP2r
 
 @<add-apple> ( -- )
@@ -110,24 +109,24 @@
 	STH
 	( | draw tail )
 	;snake-icns .Screen/addr DEO2
-	.snake/tail .snake/length LDZ DUP ADD OVR ADD SWP
+	[ LIT2 -snake/tail -snake/length ] LDZ DUP ADD OVR ADD SWP
 	&>loop ( -- )
 		LDZk #0005 SFT2 .Screen/x DEO2
 		INCk LDZ #0005 SFT2 .Screen/y DEO2
-		STHkr .Screen/sprite DEO
+		DUPr [ LITr -Screen/sprite ] DEOr
 		INC INC GTHk ?&>loop
 	POP2
 	( | draw head )
 	.snake/x LDZ #0005 SFT2 .Screen/x DEO2
 	.snake/y LDZ #0005 SFT2 .Screen/y DEO2
 	;snake-icns/face .Screen/addr DEO2
-	STHr .Screen/sprite DEO
+	[ LITr -Screen/sprite ] DEOr
 	JMP2r
 
 @<draw-apple> ( color -- )
 	.apple/x LDZ #0005 SFT2 .Screen/x DEO2
 	.apple/y LDZ #0005 SFT2 .Screen/y DEO2
-	;apple-chr .Screen/addr DEO2
+	STHk ;apple-chr ;fill-icn [ STHr ?{ SWP2 } POP2 ] .Screen/addr DEO2
 	.Screen/sprite DEO
 	JMP2r
 
@@ -136,10 +135,10 @@
 	.Screen/y DEO2
 	.snake/length LDZ
 	( x0 ) DUP #04 SFT <draw-num>
-	( 0x ) !<draw-num>
+	( >> )
 
 @<draw-num> ( num -- )
-	#00 SWP #0f AND #30 SFT2 ;font-hex ADD2 .Screen/addr DEO2
+	#000f ROT AND #30 SFT2 ;font-hex ADD2 .Screen/addr DEO2
 	[ LIT2 41 -Screen/sprite ] DEO
 	JMP2r
 
@@ -152,6 +151,8 @@
 @apple-chr [
 	0000 76ff ffff 7e3c 1008 0000 0000 0000 ]
 
+@fill-icn [ ffff ffff ffff ffff ]
+
 @font-hex [
 	007c 8282 8282 827c 0030 1010 1010 1010
 	007c 8202 7c80 80fe 007c 8202 1c02 827c