diff --git a/v2/raycaster.py b/v2/raycaster.py
index faacfd6..7946ab2 100755
--- a/v2/raycaster.py
+++ b/v2/raycaster.py
@@ -107,6 +107,7 @@ class Main:
 		self.raycastWindow = sdl2.ext.Window("3D View", size=(RAYCAST_WIN_WIDTH, RAYCAST_WIN_HEIGHT))
 		self.raycastWindow.show()
 		self.raycastSurface = self.raycastWindow.get_surface()
+		self.raycast_u32_pixels = ctypes.cast(self.raycastSurface.pixels, ctypes.POINTER(ctypes.c_uint32))	# Raw SDL surface pixel array
 
 		# Player
 		self.player_position = PLAYER_SPAWN_POSITION
@@ -379,10 +380,9 @@ class Main:
 					self.drawVline(self.raycastSurface, color, x, int(lineStart), int(lineEnd))
 
 	def drawVline(self, surface, color, x, startY, endY):
-		u32_pixels = ctypes.cast(self.raycastSurface.pixels, ctypes.POINTER(ctypes.c_uint32));
 		startIdx = startY * RAYCAST_WIN_WIDTH + x
 		for idx in range(startIdx, endY * RAYCAST_WIN_WIDTH + x, RAYCAST_WIN_WIDTH):
-			u32_pixels[idx] = color
+			self.raycast_u32_pixels[idx] = color
 
 
 	def dist(self, ax, ay, bx, by):