From 8c20e2a6c4ba2a1793f9bb6194f3ee1505e6a5db Mon Sep 17 00:00:00 2001
From: Raimon Zamora <jaildoctor@gmail.com>
Date: Mon, 29 Sep 2025 12:45:07 +0200
Subject: [PATCH] - Prototip de dibuixat de sprites funcional

---
 main.cpp | 37 ++++++++++++++++++++++++++++++++++---
 1 file changed, 34 insertions(+), 3 deletions(-)

diff --git a/main.cpp b/main.cpp
index 67e4d30..6f74499 100644
--- a/main.cpp
+++ b/main.cpp
@@ -103,6 +103,16 @@ void putpd(int x, int y, Uint8 color, float depth)
     depth_buffer[x+y*320]=depth;
 }
 
+void putps(int x, int y, Uint8 color, float depth)
+{
+    if (x<0 || y<0 || x>=320 || y>=240) return;
+    if (depth_buffer[x+y*320]>=depth)
+    {
+        screen[x+y*320]=color;
+        depth_buffer[x+y*320]=depth;
+    }
+}
+
 void line(int x1, int y1, int x2, int y2, Uint8 color)
 {
     float dx = float(x2-x1);
@@ -258,7 +268,7 @@ void drawColumn(sector &s, int screen_column, int start, int end, float a_inc, v
             float actual_dist = straight_dist / SDL_cosf(a_inc*DEG_TO_RAD);
             int tx = abs(int(actual_dist * SDL_cosf(angle*DEG_TO_RAD) - position.x)) % tex_height;
             int ty = abs(int(actual_dist * SDL_sinf(angle*DEG_TO_RAD) - position.y)) % tex_height;
-            putpd(screen_column, y, gif[tx+ty*tex_height], straight_dist);
+            putpd(screen_column, y, gif[tx+ty*tex_height], -straight_dist);
         }
 
 
@@ -419,6 +429,9 @@ int main(int argc, char *argv[])
     palette = LoadPalette(buffer);
     free(buffer);
 
+    // [DEBUG] Paleta per al depth buffer
+    //for(int i=0;i<256;++i) palette[i] = (255-i) | ((255-i)<<8) | ((255-i)<<16);
+    
     createMap();
 
     SDL_Event e;
@@ -517,11 +530,26 @@ int main(int argc, char *argv[])
         map::putp(enemy.x, enemy.y, 9);
 
         float angle_to_enemy = is_enemy_in_fov(position.x, position.y, orientation, enemy.x, enemy.y);
-        if (SDL_fabsf(angle_to_enemy) <= 32.0f)
+        if (SDL_fabsf(angle_to_enemy) <= 64.0f)
         {
+            const float d = distance(position, enemy);// * SDL_cosf(a_inc*DEG_TO_RAD);
+            float dist = d * SDL_cosf(angle_to_enemy*DEG_TO_RAD);
+            float wall_height = (32.0f*277)/dist;
             debug::print("enemy in fov: "); debug::print(angle_to_enemy); debug::newline();
             int column = int((angle_to_enemy+32.0f)/0.2f);
-            line(column, 0, column, 239, 0);
+            for (int i=0; i<wall_height;++i)
+            {
+                int tx = i * 32 / wall_height;
+                const int c = column - (wall_height/2)+i;
+                if (c>=0 && c<320) {
+                    for (int j=0;j<wall_height;++j)
+                    {
+                        int ty = j * 32 / wall_height;
+                        putps(c, 120-(wall_height/2)+j, gif[tx+ty*64], d);
+                    }
+                }
+            }
+            //line(column, 0, column, 239, 0);
         }
         /*
         float angle = SDL_atan2f(enemy.y-position.y, enemy.x-position.x)*RAD_TO_DEG;
@@ -557,6 +585,9 @@ int main(int argc, char *argv[])
         for (int i=0; i<(320*240); ++i)
         {
             pixels[i] = 0xFF000000 | palette[screen[i]];
+
+            // [DEBUG] Visualització del depth buffer
+            //pixels[i] = 0xFF000000 | palette[SDL_min(int(depth_buffer[i]),255)];
         }
         SDL_UnlockTexture(sdl_texture);
         SDL_RenderTexture(sdl_renderer, sdl_texture, NULL, NULL);