From 0998e8ed0d23317e65a42ccb9b5ef6195f7cafdf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sten=20J=C3=B8rgen=20Pettersen?=
 <stenjorgenpettersen@gmail.com>
Date: Fri, 21 Mar 2025 22:43:02 +0100
Subject: [PATCH] fr. 21. mars 22:43:02 +0100 2025

---
 main.cpp | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/main.cpp b/main.cpp
index 60f2881..4d23d67 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,3 +1,4 @@
+#include <asm-generic/errno.h>
 #include <cmath>
 #include <string>
 #include <vector>
@@ -70,6 +71,41 @@ int main(int /*argc*/, char */*argv*/[])
             double sideDistY;
             double deltaDistX = (rayDirX == 0) ? 1e30 : std::abs(1 / rayDirX);
             double deltaDistY = (rayDirY == 0) ? 1e30 : std::abs(1 / rayDirY);
+            double perpWallDist;
+            int stepX;
+            int stepY;
+            int hit = 0;
+            int side;
+            if(rayDirX < 0) {
+                stepX = -1;
+                sideDistX = (posX -mapX) * deltaDistX;
+            } else {
+                stepX = 1;
+                sideDistX = (mapX + 1.0 - posX) * deltaDistX;
+            }
+            if(rayDirY < 0) {
+                stepY = -1;
+                sideDistY = (posY - mapY) * deltaDistY;
+            } else {
+                stepY = 1;
+                sideDistY = (mapY +1.0 - posY) * deltaDistY;
+            }
+            while(hit == 0)
+            {
+                if(sideDistX < sideDistY) {
+                    sideDistX += deltaDistX;
+                    mapX += stepX;
+                    side = 0;
+                } else {
+                    sideDistY += deltaDistY;
+                    mapY += stepY;
+                    side = 1;
+                }
+                if(worldMap[mapX][mapY] > 0) hit = 1;
+                if(side == 0) perpWallDist = (sideDistX - deltaDistX);
+                else perpWallDist = (sideDistY - deltaDistY);
+                int lineHeight = (int)(h /perpWallDist);
+            }
         }
     }
 }