From 0e1084373bd0efd5cb6484b607f08e23d5457852 Mon Sep 17 00:00:00 2001
From: root <root@ihack.net>
Date: Fri, 30 Aug 2013 22:55:29 +0000
Subject: [PATCH] Simple hack that saves another 230 bytes.

---
 lib/examples/LoLShield_Tetris/LoLShield_Tetris.h   | 6 +++++-
 lib/examples/LoLShield_Tetris/LoLShield_Tetris.pde | 6 +++---
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/examples/LoLShield_Tetris/LoLShield_Tetris.h b/lib/examples/LoLShield_Tetris/LoLShield_Tetris.h
index 71bde90..001052a 100644
--- a/lib/examples/LoLShield_Tetris/LoLShield_Tetris.h
+++ b/lib/examples/LoLShield_Tetris/LoLShield_Tetris.h
@@ -31,11 +31,15 @@ typedef struct coord {
   int8_t y;
 } coord_t;
 
+typedef struct coordPacked {
+  unsigned x:2, y:2;
+} coordPacked_t;
+
 /**
  * One piece view. Each Tetris piece may have one to four views.
  */
 typedef struct pieceView {
-  coord_t elements[4];
+  coordPacked_t elements[4];
 } pieceView_t;
 
 /**
diff --git a/lib/examples/LoLShield_Tetris/LoLShield_Tetris.pde b/lib/examples/LoLShield_Tetris/LoLShield_Tetris.pde
index b6d937d..cfd3a41 100644
--- a/lib/examples/LoLShield_Tetris/LoLShield_Tetris.pde
+++ b/lib/examples/LoLShield_Tetris/LoLShield_Tetris.pde
@@ -122,7 +122,7 @@ pos_t position;
  */
 void switchPiece(const piece_t* piece, const pos_t& position, uint8_t c=1) {
   for(uint8_t i=0;i<4;i++) {
-    coord_t element = piece->views[position.view].elements[i];
+    coordPacked_t element = piece->views[position.view].elements[i];
     uint8_t eltXPos = element.x+position.coord.x;
     uint8_t eltYPos = element.y+position.coord.y;
     LedSign::Set(13-eltYPos, eltXPos, c);
@@ -180,7 +180,7 @@ void startGame() {
  */
 boolean checkPieceMove(const piece_t* piece, const pos_t& position) {
   for (uint8_t i=0; i<4; i++) {
-    coord_t element = piece->views[position.view].elements[i];
+    coordPacked_t element = piece->views[position.view].elements[i];
     int8_t eltXPos = element.x+position.coord.x;
     int8_t eltYPos = element.y+position.coord.y;
     // Check x boundaries.
@@ -278,7 +278,7 @@ void timerPieceDown(uint32_t& count) {
     } else {
       // Drop the piece on the grid.
       for (uint8_t i=0; i<4; i++) {
-        coord_t element = currentPiece->views[position.view].elements[i];
+        coordPacked_t element = currentPiece->views[position.view].elements[i];
         uint8_t eltXPos = element.x+position.coord.x;
         uint8_t eltYPos = element.y+position.coord.y;
         playGrid[eltYPos][eltXPos] = true;