From aadcecf2022ec13d15da5d816567779740a37da7 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Wed, 24 Sep 2014 15:22:09 +0200
Subject: Keep mutable entity list in the MapContext only

---
 src/view/MapView.cpp | 36 ++++++++++++++++++++++++------------
 src/view/MapView.hpp |  7 +++++--
 2 files changed, 29 insertions(+), 14 deletions(-)

(limited to 'src/view')

diff --git a/src/view/MapView.cpp b/src/view/MapView.cpp
index d511c31..c8abab5 100644
--- a/src/view/MapView.cpp
+++ b/src/view/MapView.cpp
@@ -71,21 +71,33 @@ MapView::MapView(const std::shared_ptr<Window> &window0,
 
 	tiles = SDL_CreateTextureFromSurface(window->getRenderer(), surface);
 	SDL_FreeSurface(surface);
-
-	for (auto &entity : map->getEntities()) {
-		const std::string &name = entity->getName();
-		entities[name] = SDL_CreateTextureFromSurface(window->getRenderer(), spriteCache->get("entity", name));
-	}
 }
 
 MapView::~MapView() {
 	SDL_DestroyTexture(tiles);
 
-	for (const std::pair<std::string, SDL_Texture *> &entity : entities)
+	clearEntities();
+}
+
+void MapView::updateEntities(const std::vector<std::unique_ptr<Model::Entity>> &entities) {
+	SpriteCache *spriteCache = window->getSpriteCache();
+
+	for (auto &entity : entities) {
+		const std::string &name = entity->getName();
+
+		if (!entitySprites[name])
+			entitySprites[name] = SDL_CreateTextureFromSurface(window->getRenderer(), spriteCache->get("entity", name));
+	}
+}
+
+void MapView::clearEntities() {
+	for (const std::pair<std::string, SDL_Texture *> &entity : entitySprites)
 		SDL_DestroyTexture(entity.second);
+
+	entitySprites.clear();
 }
 
-void MapView::render(float centerX, float centerY, uint64_t time) {
+void MapView::render(const std::vector<std::unique_ptr<Model::Entity>> &entities, Model::Position center, uint64_t time) {
 	SDL_RenderClear(window->getRenderer());
 
 	std::pair<int, int> viewport = window->getViewport();
@@ -96,10 +108,10 @@ void MapView::render(float centerX, float centerY, uint64_t time) {
 	float tilesW = viewport.first / tilePixels;
 	float tilesH = viewport.second / tilePixels;
 
-	int minX = std::floor(centerX - tilesW/2 - 0.5f), maxX = std::ceil(centerX + tilesW/2 + 0.5f);
-	int minY = std::floor(centerY - tilesH/2 - 0.5f), maxY = std::ceil(centerY + tilesH/2 + 0.5f);
+	int minX = std::floor(center.x - tilesW/2 - 0.5f), maxX = std::ceil(center.x + tilesW/2 + 0.5f);
+	int minY = std::floor(center.y - tilesH/2 - 0.5f), maxY = std::ceil(center.y + tilesH/2 + 0.5f);
 
-	int baseX = viewport.first/2 - int(centerX * tilePixels) - tilePixels/2, baseY = viewport.second/2 - int(centerY * tilePixels) - tilePixels/2;
+	int baseX = viewport.first/2 - int(center.x * tilePixels) - tilePixels/2, baseY = viewport.second/2 - int(center.y * tilePixels) - tilePixels/2;
 
 	for (size_t layer = 0; layer < map->getLayerCount(); layer++) {
 		for (int x = minX; x <= maxX; x++) {
@@ -127,7 +139,7 @@ void MapView::render(float centerX, float centerY, uint64_t time) {
 		}
 	}
 
-	for (const std::shared_ptr<Model::Entity> &entity : map->getEntities()) {
+	for (const std::unique_ptr<Model::Entity> &entity : entities) {
 		Model::Position pos = entity->getPosition(time);
 		Model::Direction dir = entity->getDirection();
 
@@ -145,7 +157,7 @@ void MapView::render(float centerX, float centerY, uint64_t time) {
 			.h = tilePixels,
 		};
 
-		SDL_RenderCopy(window->getRenderer(), entities[entity->getName()], &src, &dst);
+		SDL_RenderCopy(window->getRenderer(), entitySprites[entity->getName()], &src, &dst);
 	}
 }
 
diff --git a/src/view/MapView.hpp b/src/view/MapView.hpp
index e764297..e128a93 100644
--- a/src/view/MapView.hpp
+++ b/src/view/MapView.hpp
@@ -44,7 +44,7 @@ private:
 	std::shared_ptr<const Model::Map> map;
 
 	SDL_Texture *tiles;
-	std::map<std::string, SDL_Texture *> entities;
+	std::map<std::string, SDL_Texture *> entitySprites;
 
 	int getTileSize() {
 		return 32;
@@ -55,7 +55,10 @@ public:
 		const std::shared_ptr<const Model::Map> &map0);
 	~MapView();
 
-	void render(float centerX, float centerY, uint64_t time);
+	void updateEntities(const std::vector<std::unique_ptr<Model::Entity>> &entities);
+	void clearEntities();
+
+	void render(const std::vector<std::unique_ptr<Model::Entity>> &entities, Model::Position center, uint64_t time);
 };
 
 }
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