How to write text into console
Urho implements its own functions for writing text (loging) into console. If you want to use them, first you need to include Log.h
#include "Urho3D/IO/Log.h"
Writing info messages:
LOGINFO(text);
Writing debug messages:
LOGDEBUG(text);
Writing error messages:
LOGERROR(text);
Creating and using your own subsystems
If you have a class inherited from Urho's Object class, you can create a subsystem out of it. The subsystems are helpful, for example, when you want to make a class instance available to every other class inheriting from Object. In this HowTo I will create a subsystem of a class called Settings.
First things to note in subsystem creation (this text is copied from the Urho documentation):
Any Object can be registered to the Context as a subsystem, by using the function RegisterSubsystem(). They can then be accessed by any other Object inside the same context by calling GetSubsystem(). Only one instance of each object type can exist as a subsystem.
So, we can create our own subsystem in just a few steps:
1. Create an instance of your desired class inheriting from Object. I'm using a class called Settings:
Settings* gs = new Settings(context_);
2. Register it to the Context:
context_->RegisterSubsystem(gs);
So now we have created our own subsystem. We can now use it from any Object class we want by using GetSubsystem<NameOfSubsystem>()
Settings* settings = context_->GetSubsystem<Settings>();
How To Enable Post Process Effects
Urho comes with several post process effects (screen effects). Some are listed here: http://urho3d.prophpbb.com/topic55.html
You can enable them like this:
RenderPath* effectRenderPath=viewport->GetRenderPath();
effectRenderPath->Append(cache->GetResource<XMLFile>("PostProcess/AutoExposure.xml"));
effectRenderPath->Append(cache->GetResource<XMLFile>("PostProcess/BloomHDR.xml"));
effectRenderPath->Append(cache->GetResource<XMLFile>("PostProcess/FXAA2.xml"));
The linked forum post uses the Clone() function, that crashed when I use it and just appending the effect to the current RenderPath works too.
The difference between the three effects being appended and not: (I configured the effects to be stronger as per default in their .xml so they may be different if you try it.)
