From 85353d64fb502f27954b52db9365d3b4da994413 Mon Sep 17 00:00:00 2001
From: Raimon Zamora <jaildoctor@gmail.com>
Date: Mon, 2 Mar 2026 17:14:54 +0100
Subject: [PATCH] =?UTF-8?q?-=20[NEW]=20Carrega=20de=20la=20posici=C3=B3,?=
 =?UTF-8?q?=20orientaci=C3=B3=20i=20sector=20inicials=20des=20del=20WAD?=
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---
 main.cpp | 37 ++++++++++++++++++++++++++++++++++++-
 util.h   |  2 +-
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/main.cpp b/main.cpp
index 1216780..600f228 100644
--- a/main.cpp
+++ b/main.cpp
@@ -39,6 +39,13 @@ struct sector {
     std::vector<wall> walls;
 };
 
+struct thing_t {
+    int16_t x_position;
+    int16_t y_position;
+    int16_t angle;
+    int16_t type;
+    int16_t flags;
+};
 
 std::vector<sector> sectors;
 int current_sector = 38;
@@ -68,6 +75,7 @@ draw::surface_t *sky;
 int drawColumn_count = 0;
 
 uint8_t *colormap;
+thing_t *things;
 
 #pragma pack(push, 1)
 struct sidedef {
@@ -80,6 +88,16 @@ struct sidedef {
 };
 #pragma pack(pop)
 
+const bool is_inside_sector(sector &s, float x, float y)
+{
+    const vec2 infinity = {100000.0f, 100000.0f};
+    int intersections = 0;
+    for (auto wall : s.walls) {
+        if (get_line_intersection(vec2{x,y}, infinity, verts[wall.v1], verts[wall.v2], nullptr)) intersections++;
+    }
+    return (intersections%2)!=0;
+}
+
 // ------------------------------------------------------------
 // Área firmada de un contorno
 // ------------------------------------------------------------
@@ -222,6 +240,17 @@ void loadMap(const char* name)
 {
     int size;
 
+    things = (thing_t*)wad::load(name, "THINGS", &size);
+    const int thing_count = size/10;
+    for (int i=0;i<thing_count;++i)
+        if (things[i].type==1) {
+            position.x = things[i].x_position;
+            position.y = -things[i].y_position;
+            orientation = things[i].angle+180;
+            break;
+        }
+    
+
     int16_t *vertices = (int16_t *)wad::load(name, "VERTEXES", &size);
     const int num_vertices = size/4;
     for (int i=0;i<num_vertices;++i)
@@ -297,9 +326,14 @@ void loadMap(const char* name)
     free(linedefs_lump);
     free(sidedefs_lump);
 
+    int sector_index = 0;
     for (auto &s : sectors )
     {
         //order_sector_walls_with_holes(s);
+        if (is_inside_sector(s, position.x, position.y)) {
+            current_sector = sector_index;
+            height = real_height = s.floor_height + 41.0f;
+        }
 
         for (auto &w : s.walls )
         {
@@ -315,6 +349,7 @@ void loadMap(const char* name)
             const float tmp = norm.x; norm.x = -norm.y; norm.y = tmp;
             w.normal = norm;
         }
+        sector_index++;
     }
 
 }
@@ -607,7 +642,7 @@ int main(int argc, char *argv[])
     //for(int i=0;i<256;++i) palette[i] = (255-i) | ((255-i)<<8) | ((255-i)<<16);
     
     //createMap();
-    loadMap("E1M1");
+    loadMap("E1M3");
 
     SDL_Event e;
     bool should_exit = false;
diff --git a/util.h b/util.h
index 72e1eb2..136b1c6 100644
--- a/util.h
+++ b/util.h
@@ -10,4 +10,4 @@ const bool get_line_intersection(vec2 p0, vec2 p1, vec2 p2, vec2 p3, vec2 *i);
 const float distance(vec2 p1, vec2 p2);
 const void normalize(vec2 *v);
 const float dot(vec2 v1, vec2 v2);
-float is_enemy_in_fov(double Ax, double Ay, double orientation_deg, double Bx, double By);
\ No newline at end of file
+float is_enemy_in_fov(double Ax, double Ay, double orientation_deg, double Bx, double By);