From 1736931554175a70bf0a37fd70dfef8513fcf796 Mon Sep 17 00:00:00 2001
From: Daniele Verducci <daniele.verducci@ichibi.eu>
Date: Mon, 2 Jan 2023 20:40:11 +0100
Subject: [PATCH] Lighting

---
 raycaster.py | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/raycaster.py b/raycaster.py
index 9aa4a66..ddd659a 100755
--- a/raycaster.py
+++ b/raycaster.py
@@ -12,8 +12,8 @@ from time import time
 
 MAP_WIN_WIDTH = 640
 MAP_WIN_HEIGHT = 640
-RAYCAST_WIN_WIDTH = MAP_WIN_WIDTH
-RAYCAST_WIN_HEIGHT = MAP_WIN_HEIGHT
+RAYCAST_WIN_WIDTH = 900
+RAYCAST_WIN_HEIGHT = 600
 DUNGEON_WIDTH = MAP_WIN_WIDTH
 DUNGEON_HEIGHT = MAP_WIN_HEIGHT
 PLAYER_SPEED = 10
@@ -26,10 +26,10 @@ DEGREE_IN_RADIANTS = 0.01745329
 MAP = [
 	1, 1, 1, 1, 1, 1, 1, 1,
 	1, 0, 0, 0, 1, 0, 0, 1,
-	1, 0, 0, 0, 1, 1, 0, 1,
-	1, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 0, 0, 0, 0, 0, 1,
-	1, 0, 1, 0, 0, 0, 0, 1,
+	1, 0, 1, 0, 1, 0, 0, 1,
+	1, 0, 0, 0, 1, 0, 0, 1,
+	1, 0, 0, 0, 1, 0, 0, 1,
+	1, 0, 1, 1, 1, 0, 0, 1,
 	1, 0, 0, 0, 0, 0, 0, 1,
 	1, 1, 1, 1, 1, 1, 1, 1,
 ]
@@ -68,9 +68,9 @@ class Main:
 				if event.type == sdl2.SDL_KEYDOWN:
 					# Rotate player
 					if event.key.keysym.sym == sdl2.SDLK_LEFT:
-						self.player_position["r"] = self.player_position["r"] - 5*DEGREE_IN_RADIANTS
+						self.player_position["r"] = self.player_position["r"] + 10*DEGREE_IN_RADIANTS
 					elif event.key.keysym.sym == sdl2.SDLK_RIGHT:
-						self.player_position["r"] = self.player_position["r"] + 5*DEGREE_IN_RADIANTS
+						self.player_position["r"] = self.player_position["r"] - 10*DEGREE_IN_RADIANTS
 
 					# Compute deltax and deltay based on player direction
 					player_delta_x = math.cos(self.player_position["r"]) * PLAYER_SPEED
@@ -235,9 +235,15 @@ class Main:
 				lineHeight = RAYCAST_WIN_HEIGHT
 			# Center line vertically in window
 			lineOffset = RAYCAST_WIN_HEIGHT / 2 - lineHeight / 2
+
+			# Simulate lighting based on wall incidence
+			color = sdl2.ext.Color(255,255,255,255)
+			if vertDist > horizDist:
+				color = sdl2.ext.Color(200,200,200,255)
+
 			# Draw line
-			for x in range(i*10, i*10+10):
-				sdl2.ext.draw.line(self.raycastSurface, sdl2.ext.Color(255,255,255,255), (x, int(lineOffset), x, int(lineOffset + lineHeight)))
+			for x in range(i*15, i*15+15):
+				sdl2.ext.draw.line(self.raycastSurface, color, (x, int(lineOffset), x, int(lineOffset + lineHeight)))
 
 	def dist(self, ax, ay, bx, by):
 		return math.sqrt((bx-ax)*(bx-ax) + (by-ay)*(by-ay))