Entities to be rendered are sorted by render layer

Partially just for fun.

1 files changed, 21 insertions, 11 deletions

@@ -2,6 +2,7 @@
 #include "simulation.h"
 #include "consts.h"
 #include "level.h"
+#include "views.h"
 
 Renderer::Renderer()
 {
@@ -76,19 +77,28 @@ void Renderer::render(const Simulation& sim)
     }
   }
 
-  for (const Entity& entity : sim.getActive() | sim.entityView())
-  {
-    SDL_SetRenderDrawColor(ren_.get(), entity.colorVal, entity.colorVal, 65, 255);
+  constexpr Layer renderOrder[] = { Layer::track, Layer::object };
 
-    SDL_Rect rect {
-      static_cast<int>(entity.pos.x()),
-      static_cast<int>(entity.pos.y()),
-      static_cast<int>(entity.size.w()),
-      static_cast<int>(entity.size.h())
-    };
+  ranges::for_each(
+    ranges::view::for_each(
+      renderOrder,
+      [&] (Layer layer) {
+        return sim.getActive() |
+                sim.entityView() |
+                views::isOnLayer(layer);
+      }),
+    [&] (const Entity& entity) {
+      SDL_SetRenderDrawColor(ren_.get(), entity.colorVal, entity.colorVal, 65, 255);
 
-    SDL_RenderFillRect(ren_.get(), &rect);
-  }
+      SDL_Rect rect {
+        static_cast<int>(entity.pos.x()),
+        static_cast<int>(entity.pos.y()),
+        static_cast<int>(entity.size.w()),
+        static_cast<int>(entity.size.h())
+      };
+
+      SDL_RenderFillRect(ren_.get(), &rect);
+    });
 
   //SDL_RenderCopy(ren_.get(), canvas.get(), nullptr, nullptr);
   SDL_RenderPresent(ren_.get());