Modernize project codebase (#906)

* Fixed boats falling and a TP glitch #266

* Replaced every C-style cast with C++ ones

* Replaced every C-style cast with C++ ones

* Fixed boats falling and a TP glitch #266

* Updated NULL to nullptr and fixing some type issues

* Modernized and fixed a few bugs

- Replaced most instances of `NULL` with `nullptr`.
- Replaced most `shared_ptr(new ...)` with `make_shared`.
- Removed the `nullptr` macro as it was interfering with the actual nullptr keyword in some instances.

* Fixing more conflicts

* Replace int loops with size_t and start work on overrides

* Add safety checks and fix a issue with vector going OOR

1 files changed, 8 insertions, 3 deletions

diff --git a/Minecraft.Client/EntityRenderDispatcher.cpp b/Minecraft.Client/EntityRenderDispatcher.cpp
index 57fdcc47..01972e56 100644
--- a/Minecraft.Client/EntityRenderDispatcher.cpp
+++ b/Minecraft.Client/EntityRenderDispatcher.cpp
@@ -87,7 +87,7 @@ double EntityRenderDispatcher::xOff = 0.0;
 double EntityRenderDispatcher::yOff = 0.0;
 double EntityRenderDispatcher::zOff = 0.0;
 
-EntityRenderDispatcher *EntityRenderDispatcher::instance = NULL;
+EntityRenderDispatcher *EntityRenderDispatcher::instance = nullptr;
 
 void EntityRenderDispatcher::staticCtor()
 {
@@ -222,7 +222,7 @@ void EntityRenderDispatcher::prepare(Level *level, Textures *textures, Font *fon
 			int data = level->getData(Mth::floor(player->x), Mth::floor(player->y), Mth::floor(player->z));
 
 			int direction = data & 3;
-			playerRotY = (float)(direction * 90 + 180);
+			playerRotY = static_cast<float>(direction * 90 + 180);
 			playerRotX = 0;
 		}
 	} else {
@@ -245,6 +245,11 @@ void EntityRenderDispatcher::prepare(Level *level, Textures *textures, Font *fon
 
 void EntityRenderDispatcher::render(shared_ptr<Entity> entity, float a)
 {
+	if (entity == nullptr)
+	{
+		return;
+	}
+
 	double x = entity->xOld + (entity->x - entity->xOld) * a;
 	double y = entity->yOld + (entity->y - entity->yOld) * a;
 	double z = entity->zOld + (entity->z - entity->zOld) * a;
@@ -281,7 +286,7 @@ void EntityRenderDispatcher::render(shared_ptr<Entity> entity, float a)
 void EntityRenderDispatcher::render(shared_ptr<Entity> entity, double x, double y, double z, float rot, float a, bool bItemFrame, bool bRenderPlayerShadow)
 {
 	EntityRenderer *renderer = getRenderer(entity);
-	if (renderer != NULL)
+	if (renderer != nullptr)
 	{	
 		renderer->SetItemFrame(bItemFrame);