Fix Z-sorting yet again, and add real level support to map loading.

src/debugsprite.cpp

@@ -52,8 +52,8 @@ void DebugSprite::TickRender(float delta_time)
 {
     Asset::TickRender(delta_time);
 
-    data->game->GetScene()->AddTile((data->tiler << 16) | 15, 300, 200, 32, 1);
-    data->game->GetScene()->AddTile((data->tiler << 16) | 31, 300, 200, 0, 1);
+    data->game->GetScene()->AddTile((data->tiler << 16) | 15, 320, 240, 32, 1);
+    data->game->GetScene()->AddTile((data->tiler << 16) | 31, 320, 240, 0, 1);
 }
 
 DebugSprite::~DebugSprite()

src/layer.cpp

@@ -7,7 +7,7 @@
 #   include "config.h"
 #endif
 
-#include <stdlib.h>
+#include <cstdlib>
 
 #include "layer.h"
 
@@ -40,7 +40,8 @@ void Layer::Render(Scene *scene, int x, int y, int z)
     for (int j = 0; j < height; j++)
         for (int i = 0; i < width; i++)
             if (data[j * width + i])
-                scene->AddTile(data[j * width + i], x + i * 32, y + j * 32,
+                scene->AddTile(data[j * width + i],
+                               x + i * 32, y + j * 32 + altitude,
                                altitude + z, orientation);
 }
 

src/map.cpp

@@ -130,6 +130,7 @@ Map::Map(char const *path)
             data->layers = (Layer **)realloc(data->layers,
                                        sizeof(Layer **) * (data->nlayers + 1));
             orientation = toupper(a) == 'V' ? 1 : 0;
+            level = i * 32;
             data->width = j;
             data->height = k;
             tiles = (uint32_t *)malloc(j * k * sizeof(uint32_t));

src/scene.cpp

@@ -72,7 +72,7 @@ void Scene::AddTile(uint32_t code, int x, int y, int z, int o)
     if ((data->ntiles % 1024) == 0)
         data->tiles = (Tile *)realloc(data->tiles,
                                       (data->ntiles + 1024) * sizeof(Tile));
-    data->tiles[data->ntiles].prio = y - 2 * 32 * z + (o ? 0 : 32);
+    data->tiles[data->ntiles].prio = -y - 2 * 32 * z + (o ? 0 : 32);
     data->tiles[data->ntiles].code = code;
     data->tiles[data->ntiles].x = x;
     data->tiles[data->ntiles].y = y;