From 4c73347244a51bdd3f25e751afe641664e56ca3f Mon Sep 17 00:00:00 2001
From: Kelly Rauchenberger <fefferburbia@gmail.com>
Date: Sat, 23 Feb 2019 15:37:53 -0500
Subject: Entities to be rendered are sorted by render layer

Partially just for fun.
---
 src/renderer.cpp   | 32 +++++++++++++++--------
 src/simulation.cpp | 77 ++++++++++++++++++++++++++----------------------------
 2 files changed, 58 insertions(+), 51 deletions(-)

(limited to 'src')

diff --git a/src/renderer.cpp b/src/renderer.cpp
index 0feee50..5580073 100644
--- a/src/renderer.cpp
+++ b/src/renderer.cpp
@@ -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());
diff --git a/src/simulation.cpp b/src/simulation.cpp
index 27ac6ab..98687b6 100644
--- a/src/simulation.cpp
+++ b/src/simulation.cpp
@@ -8,7 +8,44 @@ Simulation::Simulation(
   const Level& level) :
     level_(level)
 {
+  id_type trainId = emplaceEntity();
+  Entity& train = getEntity(trainId);
+  train.size = TILE_SIZE;
+  train.speed = schedule_.getBPS() * 2.0;
+  train.colliderType = ColliderType::train;
+  train.scheduled = true;
+  train.colorVal = 90;
+  train.gridPos = vec2s { 6, 1 };
+  train.moveDir = Direction::left;
 
+  id_type playerId = emplaceEntity();
+  Entity& player = getEntity(playerId);
+  player.size = TILE_SIZE;
+  player.speed = 3.0;
+  player.controllable = true;
+  player.colliderType = ColliderType::player;
+  player.colorVal = 180;
+  player.gridPos = vec2s { 1, 5 };
+
+  id_type crateId = emplaceEntity();
+  Entity& crate = getEntity(crateId);
+  crate.size = TILE_SIZE;
+  crate.speed = schedule_.getBPS() * 2.0;
+  crate.colliderType = ColliderType::crate;
+  crate.canBePushedBy.insert(ColliderType::player);
+  crate.canBePushedBy.insert(ColliderType::crate);
+  crate.canBePushedBy.insert(ColliderType::train);
+  crate.gridPos = vec2s { 4, 5 };
+
+  id_type crateId2 = emplaceEntity();
+  Entity& crate2 = getEntity(crateId2);
+  crate2.size = TILE_SIZE;
+  crate2.speed = schedule_.getBPS() * 2.0;
+  crate2.colliderType = ColliderType::crate;
+  crate2.canBePushedBy.insert(ColliderType::player);
+  crate2.canBePushedBy.insert(ColliderType::crate);
+  crate2.canBePushedBy.insert(ColliderType::train);
+  crate2.gridPos = vec2s { 6, 7 };
 
   id_type trackId = emplaceEntity();
   Entity& track = getEntity(trackId);
@@ -49,46 +86,6 @@ Simulation::Simulation(
   track4.trackDir2 = Direction::down;
   track4.colorVal = 130;
   track4.gridPos = vec2s { 7, 1 };
-
-
-  id_type trainId = emplaceEntity();
-  Entity& train = getEntity(trainId);
-  train.size = TILE_SIZE;
-  train.speed = schedule_.getBPS() * 2.0;
-  train.colliderType = ColliderType::train;
-  train.scheduled = true;
-  train.colorVal = 90;
-  train.gridPos = vec2s { 6, 1 };
-  train.moveDir = Direction::left;
-
-  id_type playerId = emplaceEntity();
-  Entity& player = getEntity(playerId);
-  player.size = TILE_SIZE;
-  player.speed = 3.0;
-  player.controllable = true;
-  player.colliderType = ColliderType::player;
-  player.colorVal = 180;
-  player.gridPos = vec2s { 1, 5 };
-
-  id_type crateId = emplaceEntity();
-  Entity& crate = getEntity(crateId);
-  crate.size = TILE_SIZE;
-  crate.speed = schedule_.getBPS() * 2.0;
-  crate.colliderType = ColliderType::crate;
-  crate.canBePushedBy.insert(ColliderType::player);
-  crate.canBePushedBy.insert(ColliderType::crate);
-  crate.canBePushedBy.insert(ColliderType::train);
-  crate.gridPos = vec2s { 4, 5 };
-
-  id_type crateId2 = emplaceEntity();
-  Entity& crate2 = getEntity(crateId2);
-  crate2.size = TILE_SIZE;
-  crate2.speed = schedule_.getBPS() * 2.0;
-  crate2.colliderType = ColliderType::crate;
-  crate2.canBePushedBy.insert(ColliderType::player);
-  crate2.canBePushedBy.insert(ColliderType::crate);
-  crate2.canBePushedBy.insert(ColliderType::train);
-  crate2.gridPos = vec2s { 6, 7 };
 }
 
 void Simulation::tick(
-- 
cgit 1.4.1