Implements the plane optimal shadow camera algorithm. More...

Inheritance diagram for Ogre::PlaneOptimalShadowCameraSetup:

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Public Member Functions
	PlaneOptimalShadowCameraSetup (MovablePlane *plane)
	Constructor – requires a plane of interest.

virtual	~PlaneOptimalShadowCameraSetup ()
	Destructor.

virtual void	getShadowCamera (const SceneManager sm, const Camera cam, const Viewport vp, const Light light, Camera *texCam, size_t iteration) const
	Returns shadow camera configured to get 1-1 homography between screen and shadow map when restricted to plane.

void	operator delete (void *ptr)

void	operator delete (void ptr, const char , int, const char *)

void	operator delete (void ptr, void )

void	operator delete[] (void *ptr)

void	operator delete[] (void ptr, const char , int, const char *)

void *	operator new (size_t sz)

void *	operator new (size_t sz, const char file, int line, const char func)
	operator new, with debug line info

void *	operator new (size_t sz, void *ptr)
	placement operator new

void *	operator new[] (size_t sz)

void *	operator new[] (size_t sz, const char file, int line, const char func)
	array operator new, with debug line info

Private Member Functions
	PlaneOptimalShadowCameraSetup ()
	Default constructor is private.

Matrix4	computeConstrainedProjection (const Vector4 &pinhole, const vector< Vector4 >::type &fpoint, const vector< Vector2 >::type &constraint) const
	helper function computing projection matrix given constraints

Detailed Description

Implements the plane optimal shadow camera algorithm.

Remarks: Given a plane of interest, it is possible to set up the shadow camera matrix such that the mapping between screen and shadow map is the identity (when restricted to pixels that view the plane of interest). Therefore, if the shadow map resolution matches the screen space resolution (of the seen planar receiver), we can get pixel perfect shadowing on the plane. Off the plane, the shadowing is not guaranteed to be perfect and will likely exhibit the usual sampling artifacts associated with shadow mapping.

Note: Important: this routine requires double-precision calculations. When you are running under Direct3D, you must ensure that you set the floating point mode to 'Consistent' rather than 'Fastest' to ensure this precision. This does allegedly come with some performance cost but when measuring it appears to be negligible in modern systems for normal usage.; Second important note: this projection also only works for lights with a finite position. Therefore you cannot use it for directional lights at this time.

Constructor & Destructor Documentation

Ogre::PlaneOptimalShadowCameraSetup::PlaneOptimalShadowCameraSetup ( )

private

Default constructor is private.

Ogre::PlaneOptimalShadowCameraSetup::PlaneOptimalShadowCameraSetup ( MovablePlane * plane )

Constructor – requires a plane of interest.

virtual Ogre::PlaneOptimalShadowCameraSetup::~PlaneOptimalShadowCameraSetup ( )

virtual

Destructor.

Matrix4 Ogre::PlaneOptimalShadowCameraSetup::computeConstrainedProjection	(	const Vector4 &	pinhole,
		const vector< Vector4 >::type &	fpoint,
		const vector< Vector2 >::type &	constraint ) const

private

helper function computing projection matrix given constraints

virtual void Ogre::PlaneOptimalShadowCameraSetup::getShadowCamera	(	const SceneManager *	sm,
		const Camera *	cam,
		const Viewport *	vp,
		const Light *	light,
		Camera *	texCam,
		size_t	iteration ) const