OGRE-Next  3.0.0unstable
Object-Oriented Graphics Rendering Engine
Ogre::PlaneOptimalShadowCameraSetup Class Reference

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

#include <OgreShadowCameraSetupPlaneOptimal.h>

+ Inheritance diagram for Ogre::PlaneOptimalShadowCameraSetup:

Public Member Functions

 PlaneOptimalShadowCameraSetup (MovablePlane *plane)
 Constructor – requires a plane of interest. More...
 
 ~PlaneOptimalShadowCameraSetup () override
 Destructor. More...
 
void getShadowCamera (const SceneManager *sm, const Camera *cam, const Light *light, Camera *texCam, size_t iteration, const Vector2 &viewportRealSize) const override
 Returns shadow camera configured to get 1-1 homography between screen and shadow map when restricted to plane. More...
 
- Public Member Functions inherited from Ogre::ShadowCameraSetup
 ShadowCameraSetup ()
 
virtual ~ShadowCameraSetup ()
 Need virtual destructor in case subclasses use it. More...
 
Real getMaxDistance () const
 
Real getMinDistance () const
 

Additional Inherited Members

- Static Public Member Functions inherited from Ogre::ShadowCameraSetup
static void setUseEsm (bool useEsm)
 

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

◆ PlaneOptimalShadowCameraSetup()

Ogre::PlaneOptimalShadowCameraSetup::PlaneOptimalShadowCameraSetup ( MovablePlane plane)

Constructor – requires a plane of interest.

◆ ~PlaneOptimalShadowCameraSetup()

Ogre::PlaneOptimalShadowCameraSetup::~PlaneOptimalShadowCameraSetup ( )
override

Destructor.

Member Function Documentation

◆ getShadowCamera()

void Ogre::PlaneOptimalShadowCameraSetup::getShadowCamera ( const SceneManager sm,
const Camera cam,
const Light light,
Camera texCam,
size_t  iteration,
const Vector2 viewportRealSize 
) const
overridevirtual

Returns shadow camera configured to get 1-1 homography between screen and shadow map when restricted to plane.

Implements Ogre::ShadowCameraSetup.


The documentation for this class was generated from the following file: