From 1436b17c30145c20b2c96da3373092252771d16d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= <tastyfish@seznam.cz>
Date: Wed, 12 Sep 2018 12:47:16 +0200
Subject: [PATCH] Add lift

---
 testSDL.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/testSDL.c b/testSDL.c
index dff9094..d5509f5 100644
--- a/testSDL.c
+++ b/testSDL.c
@@ -41,6 +41,8 @@
 
 int keys[KEYS];
 
+unsigned long frame = 0;
+
 Unit zBuffer[SCREEN_WIDTH]; ///< 1D z-buffer for visibility determination.
 
 Camera camera;
@@ -753,6 +755,9 @@ Unit textureAt(int16_t x, int16_t y)
 
 Unit floorHeightAt(int16_t x, int16_t y)
 {
+  if (x == 6 && (y == 13 || y == 14)) // moving lift
+    return ((absVal(-1 * (frame % 64) + 32)) * UNITS_PER_SQUARE) / 8; 
+
   if (x >= 0 && x < LEVEL_X_RES && y >= 0 && y < LEVEL_Y_RES)
     return (levelFloor[(LEVEL_Y_RES - y -1) * LEVEL_X_RES + x] * UNITS_PER_SQUARE) / 8; 
 
@@ -1022,6 +1027,8 @@ int main()
     SDL_RenderClear(renderer);
     SDL_RenderCopy(renderer,texture,NULL,NULL);
     SDL_RenderPresent(renderer);
+
+    frame++;
   }
 
   return 0;