Screen.cpp
No OneTemporary
Actions

Size

1 KB

Referenced Files

None

Subscribers

None

Screen.cpp
View Options

	#include <echo/Graphics/Scene.h>
	#include <echo/GUI/Screen.h>
	#include <echo/Graphics/RenderTarget.h>
	#include <echo/Graphics/Camera.h>

	namespace Echo
	{
	namespace GUI
	{
	Screen::Screen() : mUpdateSizeToCamera(true)
	{
	}

	Screen::~Screen()
	{

	}

	void Screen::Accept(SceneRenderableVisitor& visitor)
	{
	if(mUpdateSizeToCamera)
	{
	const Camera* camera = visitor.GetCurrentCamera();

	if(camera)
	{
	if(camera->GetProjectionType()==ProjectionTypes::PERSPECTIVE)
	{
	Scalar distance = GetDerivedPosition().Distance(camera->GetPosition());

	// Calculate so that the horizontal view takes up viewWidth units.
	Radian halfFOVx = camera->GetFOV() / 2.f;
	Scalar width = (Maths::Tan(halfFOVx.ValueRadians()) * distance) * 2.f;
	Scalar height = width / camera->GetAspectRatio();

	//The SetSize() function takes care of setting to the same size (i.e not causing an update)
	SetSize(width,height);
	}else
	{
	SetSize(camera->GetOrthoWindowWidth(),camera->GetOrthoWindowHeight());
	}
	}
	}
	SceneEntity::Accept(visitor);
	}
	}
	}