From cdc71ac981a89c6ffa143283a0fec3d558222e4d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= <tastyfish@seznam.cz>
Date: Sun, 9 Sep 2018 16:29:48 +0200
Subject: [PATCH] Fix ceiling coll bug

---
 raycastlib.h | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/raycastlib.h b/raycastlib.h
index 96a87bf..96041ea 100644
--- a/raycastlib.h
+++ b/raycastlib.h
@@ -1115,33 +1115,33 @@ void moveCameraWithCollision(Camera *camera, Vector2D planeOffset,
       divRoundDown(camera->position.y + CAMERA_COLL_RADIUS,UNITS_PER_SQUARE);
 
     Unit bottomLimit = floorHeightFunc(xSquare1,ySquare1);
+    Unit topLimit = ceilingHeightFunc != 0 ?
+      ceilingHeightFunc(xSquare1,ySquare1) : UNIT_INFINITY;
 
     Unit height;
 
-    if (xSquare2 != xSquare1)
-    {
-      height = floorHeightFunc(xSquare2,ySquare1);
-      bottomLimit = bottomLimit < height ? height : bottomLimit;
+    #define checkSquares(s1,s2)\
+    {\
+      height = floorHeightFunc(xSquare##s1,ySquare##s2);\
+      bottomLimit = bottomLimit < height ? height : bottomLimit;\
+      height = ceilingHeightFunc != 0 ?\
+        ceilingHeightFunc(xSquare##s1,ySquare##s2) : UNIT_INFINITY;\
+      topLimit = topLimit > height ? height : topLimit;\
     }
 
+    if (xSquare2 != xSquare1)
+      checkSquares(2,1)
+
     if (ySquare2 != ySquare1)
-    {
-      height = floorHeightFunc(xSquare1,ySquare2);
-      bottomLimit = bottomLimit < height ? height : bottomLimit;
-    }
+      checkSquares(1,2)
 
     if (xSquare2 != xSquare1 && ySquare2 != ySquare1)
-    {
-      height = floorHeightFunc(xSquare2,ySquare2);
-      bottomLimit = bottomLimit < height ? height : bottomLimit;
-    }
+      checkSquares(2,2)
 
-    Unit topLimit = ceilingHeightFunc != 0 ?
-      ceilingHeightFunc(xSquareNew,ySquareNew) : UNIT_INFINITY;
-   
     camera->height = clamp(camera->height,
       bottomLimit + CAMERA_COLL_HEIGHT_BELOW,
       topLimit - CAMERA_COLL_HEIGHT_ABOVE);
+    #undef checkSquares
   }
 }