Fix assets

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 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
 <https://www.gnu.org/licenses/why-not-lgpl.html>.
--- a/README.md
+++ b/README.md
@ -1,39 +0,0 @@
 # Python raycaster
 A simple [raycasting engine](https://en.wikipedia.org/wiki/Ray_casting), like the one used for [Wolfenstein 3D](https://en.wikipedia.org/wiki/Wolfenstein_3D), written in Python using the [SDL graphics library](https://en.wikipedia.org/wiki/Simple_DirectMedia_Layer).
 Inspired by [this video of 3DSage](https://www.youtube.com/watch?v=gYRrGTC7GtA)
 ![Screenshot](images/screenshot.png)
 ![Screenshot](images/screenshot2.png)
 ## Requirements
 Install SDL libs for Python and PNG lib (required for texture loading):
 ```
 pip install pysdl2 pysdl2-dll pypng
 ```
 ## Run
 Run with
 ```
 ./raycaster.py
 ```
 ## Context
 Being this an educational project (done to teach myself SDL and how a raycasting engine works), the performances are pretty bad. The code is written to be documental, more than efficient. I decided to keep the various milestones in different folders (v1, v2, v3...) instead of relying on git versioning to allow easier compare between different milestones.
 ## License
 Copyright (C) 2023 Daniele Verducci
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <https://www.gnu.org/licenses/>.
--- a/images/screenshot.png
+++ b/images/screenshot.png
--- a/images/screenshot2.png
+++ b/images/screenshot2.png
--- a/v3/assets/texture_temple.png
+++ b/v3/assets/texture_temple.png
--- a/v3/assets/texture_wall_brick_flag.png
+++ b/v3/assets/texture_wall_brick_flag.png
--- a/v3/raycaster.py
+++ b/v3/raycaster.py
@ -1,23 +1,8 @@
 #!/usr/bin/env python3
-# PYTHON RAYCASTER
+# RAYCASTER
 # Inspired by https://www.youtube.com/watch?v=gYRrGTC7GtA
-# Copyright (C) 2023 Daniele Verducci
+#
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 # REQUIREMENTS:
 # pip install pysdl2 pysdl2-dll pypng
 import sys
@ -42,20 +27,17 @@ TEXTURES = [
 	"assets/texture_wall_brick_door_left.png",	# = map index 2
 	"assets/texture_wall_brick_door_center.png",	# = map index 3
 	"assets/texture_wall_brick_door_right.png",	# = map index 4
 	"assets/texture_wall_brick_flag.png",	# = map index 5
 	"assets/texture_temple.png",	# = map index 6
 ]
 TEXTURE_SIZE = 64
 # Raycast cfg
-RAYCAST_WIN_WIDTH = 1000
+RAYCAST_WIN_WIDTH = 1024
-RAYCAST_WIN_HEIGHT = 1000
+RAYCAST_WIN_HEIGHT = 1024
-RAYCAST_RENDER_MULTIPLIER = 4
+RAYCAST_RENDER_WIDTH = int(RAYCAST_WIN_WIDTH / 4)
-RAYCAST_RENDER_WIDTH = int(RAYCAST_WIN_WIDTH / RAYCAST_RENDER_MULTIPLIER)
+RAYCAST_RENDER_HEIGHT = int(RAYCAST_WIN_HEIGHT / 4)
 RAYCAST_RENDER_HEIGHT = int(RAYCAST_WIN_HEIGHT / RAYCAST_RENDER_MULTIPLIER)
 DOF = 2*MAP_SIZE	# Depth Of Field
-CEILING_COLOR = [0,128,255]
+CEILING_COLOR = sdl2.ext.Color(0,128,255,255)
-FLOOR_COLOR = [64,64,64]
+FLOOR_COLOR = sdl2.ext.Color(64,64,64,255)
 # Player cfg
 PLAYER_SPEED = 8
@ -64,21 +46,21 @@ PLAYER_SPAWN_POSITION = {"x": 1.5, "y": 1.5, "r": 1.7}	# r is rotation in radian
 # Dungeon data
 MAP = [
-	1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 4, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 1, 0, 0, 6, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 5, 0, 0, 0, 0, 0, 0, 0, 5, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 2, 1, 1, 5, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 2, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 3, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 3, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 4, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 4, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 1, 0, 0, 0, 3, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 1, 0, 0, 0, 4, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
 	1, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
 	1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
 	1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
@ -93,7 +75,7 @@ MAP = [
 	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
 	1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
 	1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+	1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
 	1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 ]
@ -120,9 +102,10 @@ class Main:
 			self.mapWindow.show()
 			self.mapSurface = self.mapWindow.get_surface()
-		self.raycastWindow = sdl2.SDL_CreateWindow(b"3D View", 100, 100, RAYCAST_WIN_WIDTH, RAYCAST_WIN_HEIGHT,sdl2.SDL_WINDOW_SHOWN)
+		self.raycastWindow = sdl2.ext.Window("3D View", size=(RAYCAST_WIN_WIDTH, RAYCAST_WIN_HEIGHT))
-		self.raycastRenderer = sdl2.SDL_CreateRenderer(self.raycastWindow, -1,sdl2.SDL_RENDERER_ACCELERATED |sdl2.SDL_RENDERER_PRESENTVSYNC)
+		self.raycastWindow.show()
-		self.raycastSurface = sdl2.SDL_CreateRGBSurface(0,RAYCAST_WIN_WIDTH,RAYCAST_WIN_HEIGHT,32,0,0,0,0)
+		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 = {"x": int(MAP_SCALE * PLAYER_SPAWN_POSITION["x"]), "y": int(MAP_SCALE * PLAYER_SPAWN_POSITION["y"]), "r": PLAYER_SPAWN_POSITION["r"]}	# r is rotation in radiants
@ -179,7 +162,7 @@ class Main:
 			self.draw()
 			if not MAP_HIDDEN:
 				self.mapWindow.refresh()
-			#self.raycastWindow.refresh()
+			self.raycastWindow.refresh()
 			# Calculate FPS
 			frames = frames + 1
@ -214,9 +197,7 @@ class Main:
 		if not MAP_HIDDEN:
 			self.draw2Dmap()
 			self.drawPlayer()
 		self.drawRays()
 		sdl2.SDL_RenderPresent(self.raycastRenderer)
 	def drawPlayer(self):
 		# Player in 2D map
@ -241,12 +222,8 @@ class Main:
 			sdl2.ext.draw.fill(self.mapSurface, sdl2.ext.Color(color,color,color,255), (posX, posY, MAP_SCALE - 1, MAP_SCALE - 1))
 	def drawRays(self):
-		# Ceiling
+		sdl2.ext.draw.fill(self.raycastSurface, CEILING_COLOR, (0, 0, RAYCAST_WIN_WIDTH, RAYCAST_WIN_HEIGHT/2)) # Clears upper raycast screen (draws ceiling)
-		sdl2.SDL_SetRenderDrawColor(self.raycastRenderer, CEILING_COLOR[0], CEILING_COLOR[1], CEILING_COLOR[2], sdl2.SDL_ALPHA_OPAQUE)
+		sdl2.ext.draw.fill(self.raycastSurface, FLOOR_COLOR, (0, RAYCAST_WIN_HEIGHT/2, RAYCAST_WIN_WIDTH, RAYCAST_WIN_HEIGHT/2)) # Clears upper raycast screen (draws floor)
 		sdl2.SDL_RenderClear(self.raycastRenderer)
 		# Floor
 		sdl2.SDL_SetRenderDrawColor(self.raycastRenderer, FLOOR_COLOR[0], FLOOR_COLOR[1], FLOOR_COLOR[2], sdl2.SDL_ALPHA_OPAQUE)
 		sdl2.SDL_RenderFillRect(self.raycastRenderer, sdl2.SDL_Rect(0, int(RAYCAST_WIN_HEIGHT/2), RAYCAST_WIN_WIDTH, int(RAYCAST_WIN_HEIGHT)))
 		# Casts rays for raycasting
 		playerAngle = self.player_position["r"]
@ -400,15 +377,12 @@ class Main:
 					continue
 				# Draw segment (all is scaled x4)
-
+				x = i * 4
-				b = color & 0b000000000000000011111111
+				for idx in range(int(lineStart * 4) * RAYCAST_WIN_WIDTH + x, int(lineEnd * 4) * RAYCAST_WIN_WIDTH + x, RAYCAST_WIN_WIDTH):
-				g = color >> 8 & 0b000000000000000011111111
+					self.raycast_u32_pixels[idx] = color
-				r = color >> 16 & 0b000000000000000011111111
+					self.raycast_u32_pixels[idx + 1] = color
-				sdl2.SDL_SetRenderDrawColor(self.raycastRenderer, r, g, b, sdl2.SDL_ALPHA_OPAQUE) # Non fare in tutti i cicli
+					self.raycast_u32_pixels[idx + 2] = color
-
+					self.raycast_u32_pixels[idx + 3] = color
 				x = i * RAYCAST_RENDER_MULTIPLIER
 				#sdl2.SDL_RenderFillRect(self.raycastRenderer, sdl2.SDL_Rect(x, int(lineStart * RAYCAST_RENDER_MULTIPLIER), RAYCAST_RENDER_MULTIPLIER, int((lineEnd - lineStart) * RAYCAST_RENDER_MULTIPLIER) + 1))
 				sdl2.SDL_RenderFillRectF(self.raycastRenderer, sdl2.SDL_FRect(x, lineStart * RAYCAST_RENDER_MULTIPLIER, RAYCAST_RENDER_MULTIPLIER, (lineEnd - lineStart) * RAYCAST_RENDER_MULTIPLIER))
 	def shade(self, color):
 		# Obtain channels