Ogre::RenderSystem Class Reference

Defines the functionality of a 3D API. More...

#include <OgreRenderSystem.h>

Inheritance diagram for Ogre::RenderSystem:

List of all members.


Public Types
typedef MapIterator< Ogre::RenderTargetMap >	RenderTargetIterator
	Iterator over RenderTargets.
Public Member Functions
	RenderSystem ()
	Default Constructor.
virtual	~RenderSystem ()
	Destructor.
virtual const String &	getName (void) const=0
	Returns the name of the rendering system.
virtual ConfigOptionMap &	getConfigOptions (void)=0
	Returns the details of this API's configuration options.
virtual void	setConfigOption (const String &name, const String &value)=0
	Sets an option for this API.
virtual HardwareOcclusionQuery *	createHardwareOcclusionQuery (void)=0
	Create an object for performing hardware occlusion queries.
virtual void	destroyHardwareOcclusionQuery (HardwareOcclusionQuery *hq)
	Destroy a hardware occlusion query object.
virtual String	validateConfigOptions (void)=0
	Validates the options set for the rendering system, returning a message if there are problems.
virtual RenderWindow *	initialise (bool autoCreateWindow, const String &windowTitle="OGRE Render Window")
	Start up the renderer using the settings selected (Or the defaults if none have been selected).
virtual void	reinitialise (void)=0
	Restart the renderer (normally following a change in settings).
virtual void	shutdown (void)
	Shutdown the renderer and cleanup resources.
virtual void	setAmbientLight (float r, float g, float b)=0
	Sets the colour & strength of the ambient (global directionless) light in the world.
virtual void	setShadingType (ShadeOptions so)=0
	Sets the type of light shading required (default = Gouraud).
virtual void	setLightingEnabled (bool enabled)=0
	Sets whether or not dynamic lighting is enabled.
void	setWBufferEnabled (bool enabled)
	Sets whether or not W-buffers are enabled if they are avalible for this renderer.
bool	getWBufferEnabled (void) const
	Returns true if the renderer will try to use W-buffers when avalible.
virtual RenderWindow *	createRenderWindow (const String &name, unsigned int width, unsigned int height, bool fullScreen, const NameValuePairList *miscParams=0)=0
	Creates a new rendering window.
RenderTexture *	createRenderTexture (const String &name, unsigned int width, unsigned int height, TextureType texType=TEX_TYPE_2D, PixelFormat internalFormat=PF_X8R8G8B8, const NameValuePairList *miscParams=0)
	Creates and registers a render texture object.
virtual MultiRenderTarget *	createMultiRenderTarget (const String &name)=0
	Create a MultiRenderTarget, which is a render target that renders to multiple RenderTextures at once.
virtual void	destroyRenderWindow (const String &name)
	Destroys a render window.
virtual void	destroyRenderTexture (const String &name)
	Destroys a render texture.
virtual void	destroyRenderTarget (const String &name)
	Destroys a render target of any sort.
virtual void	attachRenderTarget (RenderTarget &target)
	Attaches the passed render target to the render system.
virtual RenderTarget *	getRenderTarget (const String &name)
	Returns a pointer to the render target with the passed name, or NULL if that render target cannot be found.
virtual RenderTarget *	detachRenderTarget (const String &name)
	Detaches the render target with the passed name from the render system and returns a pointer to it.
virtual RenderTargetIterator	getRenderTargetIterator (void)
	Returns a specialised MapIterator over all render targets attached to the RenderSystem.
virtual String	getErrorDescription (long errorNumber) const=0
	Returns a description of an error code.
void	setWaitForVerticalBlank (bool enabled)
	Defines whether or now fullscreen render windows wait for the vertical blank before flipping buffers.
bool	getWaitForVerticalBlank (void) const
	Returns true if the system is synchronising frames with the monitor vertical blank.
virtual void	_useLights (const LightList &lights, unsigned short limit)=0
	Tells the rendersystem to use the attached set of lights (and no others) up to the number specified (this allows the same list to be used with different count limits).
virtual void	_setWorldMatrix (const Matrix4 &m)=0
	Sets the world transform matrix.
virtual void	_setWorldMatrices (const Matrix4 *m, unsigned short count)
	Sets multiple world matrices (vertex blending).
virtual void	_setViewMatrix (const Matrix4 &m)=0
	Sets the view transform matrix.
virtual void	_setProjectionMatrix (const Matrix4 &m)=0
	Sets the projection transform matrix.
virtual void	_setTextureUnitSettings (size_t texUnit, TextureUnitState &tl)
	Utility function for setting all the properties of a texture unit at once.
virtual void	_disableTextureUnit (size_t texUnit)
	Turns off a texture unit.
virtual void	_disableTextureUnitsFrom (size_t texUnit)
	Disables all texture units from the given unit upwards.
virtual void	_setSurfaceParams (const ColourValue &ambient, const ColourValue &diffuse, const ColourValue &specular, const ColourValue &emissive, Real shininess, TrackVertexColourType tracking=TVC_NONE)=0
	Sets the surface properties to be used for future rendering.
virtual void	_setPointSpritesEnabled (bool enabled)=0
	Sets whether or not rendering points using OT_POINT_LIST will render point sprites (textured quads) or plain points.
virtual void	_setPointParameters (Real size, bool attenuationEnabled, Real constant, Real linear, Real quadratic, Real minSize, Real maxSize)=0
	Sets the size of points and how they are attenuated with distance.
virtual void	_setTexture (size_t unit, bool enabled, const String &texname)=0
	Sets the status of a single texture stage.
virtual void	_setTextureCoordSet (size_t unit, size_t index)=0
	Sets the texture coordinate set to use for a texture unit.
virtual void	_setTextureCoordCalculation (size_t unit, TexCoordCalcMethod m, const Frustum *frustum=0)=0
	Sets a method for automatically calculating texture coordinates for a stage.
virtual void	_setTextureBlendMode (size_t unit, const LayerBlendModeEx &bm)=0
	Sets the texture blend modes from a TextureUnitState record.
virtual void	_setTextureUnitFiltering (size_t unit, FilterOptions minFilter, FilterOptions magFilter, FilterOptions mipFilter)
	Sets the filtering options for a given texture unit.
virtual void	_setTextureUnitFiltering (size_t unit, FilterType ftype, FilterOptions filter)=0
	Sets a single filter for a given texture unit.
virtual void	_setTextureLayerAnisotropy (size_t unit, unsigned int maxAnisotropy)=0
	Sets the maximal anisotropy for the specified texture unit.
virtual void	_setTextureAddressingMode (size_t unit, const TextureUnitState::UVWAddressingMode &uvw)=0
	Sets the texture addressing mode for a texture unit.
virtual void	_setTextureBorderColour (size_t unit, const ColourValue &colour)=0
	Sets the texture border colour for a texture unit.
virtual void	_setTextureMatrix (size_t unit, const Matrix4 &xform)=0
	Sets the texture coordinate transformation matrix for a texture unit.
virtual void	_setSceneBlending (SceneBlendFactor sourceFactor, SceneBlendFactor destFactor)=0
	Sets the global blending factors for combining subsequent renders with the existing frame contents.
virtual void	_setAlphaRejectSettings (CompareFunction func, unsigned char value)=0
	Sets the global alpha rejection approach for future renders.
virtual void	_beginFrame (void)=0
	Signifies the beginning of a frame, ie the start of rendering on a single viewport.
virtual void	_endFrame (void)=0
	Ends rendering of a frame to the current viewport.
virtual void	_setViewport (Viewport *vp)=0
	Sets the provided viewport as the active one for future rendering operations.
virtual Viewport *	_getViewport (void)
	Get the current active viewport for rendering.
virtual void	_setCullingMode (CullingMode mode)=0
	Sets the culling mode for the render system based on the 'vertex winding'.
virtual CullingMode	_getCullingMode (void) const
virtual void	_setDepthBufferParams (bool depthTest=true, bool depthWrite=true, CompareFunction depthFunction=CMPF_LESS_EQUAL)=0
	Sets the mode of operation for depth buffer tests from this point onwards.
virtual void	_setDepthBufferCheckEnabled (bool enabled=true)=0
	Sets whether or not the depth buffer check is performed before a pixel write.
virtual void	_setDepthBufferWriteEnabled (bool enabled=true)=0
	Sets whether or not the depth buffer is updated after a pixel write.
virtual void	_setDepthBufferFunction (CompareFunction func=CMPF_LESS_EQUAL)=0
	Sets the comparison function for the depth buffer check.
virtual void	_setColourBufferWriteEnabled (bool red, bool green, bool blue, bool alpha)=0
	Sets whether or not colour buffer writing is enabled, and for which channels.
virtual void	_setDepthBias (ushort bias)=0
	Sets the depth bias, NB you should use the Material version of this.
virtual void	_setFog (FogMode mode=FOG_NONE, const ColourValue &colour=ColourValue::White, Real expDensity=1.0, Real linearStart=0.0, Real linearEnd=1.0)=0
	Sets the fogging mode for future geometry.
virtual void	_beginGeometryCount (void)
	The RenderSystem will keep a count of tris rendered, this resets the count.
virtual unsigned int	_getFaceCount (void) const
	Reports the number of tris rendered since the last _beginGeometryCount call.
virtual unsigned int	_getVertexCount (void) const
	Reports the number of vertices passed to the renderer since the last _beginGeometryCount call.
virtual void	convertColourValue (const ColourValue &colour, uint32 *pDest)
	Generates a packed data version of the passed in ColourValue suitable for use as with this RenderSystem.
virtual VertexElementType	getColourVertexElementType (void) const=0
	Get the native VertexElementType for a compact 32-bit colour value for this rendersystem.
virtual void	_convertProjectionMatrix (const Matrix4 &matrix, Matrix4 &dest, bool forGpuProgram=false)=0
	Converts a uniform projection matrix to suitable for this render system.
virtual void	_makeProjectionMatrix (const Radian &fovy, Real aspect, Real nearPlane, Real farPlane, Matrix4 &dest, bool forGpuProgram=false)=0
	Builds a perspective projection matrix suitable for this render system.
virtual void	_makeProjectionMatrix (Real left, Real right, Real bottom, Real top, Real nearPlane, Real farPlane, Matrix4 &dest, bool forGpuProgram=false)=0
	Builds a perspective projection matrix for the case when frustum is not centered around camera.
virtual void	_makeOrthoMatrix (const Radian &fovy, Real aspect, Real nearPlane, Real farPlane, Matrix4 &dest, bool forGpuProgram=false)=0
	Builds an orthographic projection matrix suitable for this render system.
virtual void	_applyObliqueDepthProjection (Matrix4 &matrix, const Plane &plane, bool forGpuProgram)=0
	Update a perspective projection matrix to use 'oblique depth projection'.
virtual void	_setPolygonMode (PolygonMode level)=0
	Sets how to rasterise triangles, as points, wireframe or solid polys.
virtual void	setStencilCheckEnabled (bool enabled)=0
	Turns stencil buffer checking on or off.
virtual void	setStencilBufferParams (CompareFunction func=CMPF_ALWAYS_PASS, uint32 refValue=0, uint32 mask=0xFFFFFFFF, StencilOperation stencilFailOp=SOP_KEEP, StencilOperation depthFailOp=SOP_KEEP, StencilOperation passOp=SOP_KEEP, bool twoSidedOperation=false)=0
	This method allows you to set all the stencil buffer parameters in one call.
virtual void	setVertexDeclaration (VertexDeclaration *decl)=0
	Sets the current vertex declaration, ie the source of vertex data.
virtual void	setVertexBufferBinding (VertexBufferBinding *binding)=0
	Sets the current vertex buffer binding state.
virtual void	setNormaliseNormals (bool normalise)=0
	Sets whether or not normals are to be automatically normalised.
virtual void	_render (const RenderOperation &op)
	Render something to the active viewport.
const RenderSystemCapabilities *	getCapabilities (void) const
	Gets the capabilities of the render system.
virtual void	bindGpuProgram (GpuProgram *prg)
	Binds a given GpuProgram (but not the parameters).
virtual void	bindGpuProgramParameters (GpuProgramType gptype, GpuProgramParametersSharedPtr params)=0
	Bind Gpu program parameters.
virtual void	bindGpuProgramPassIterationParameters (GpuProgramType gptype)=0
	Only binds Gpu program parameters used for passes that have more than one iteration rendering.
virtual void	unbindGpuProgram (GpuProgramType gptype)
	Unbinds GpuPrograms of a given GpuProgramType.
virtual bool	isGpuProgramBound (GpuProgramType gptype)
	Returns whether or not a Gpu program of the given type is currently bound.
virtual void	setClipPlanes (const PlaneList &clipPlanes)=0
	sets the clipping region.
virtual void	_initRenderTargets (void)
	Utility method for initialising all render targets attached to this rendering system.
virtual void	_notifyCameraRemoved (const Camera *cam)
	Utility method to notify all render targets that a camera has been removed, incase they were referring to it as their viewer.
virtual void	_updateAllRenderTargets (void)
	Internal method for updating all render targets attached to this rendering system.
virtual void	setClipPlane (ushort index, const Plane &p)
	Set a clipping plane.
virtual void	setClipPlane (ushort index, Real A, Real B, Real C, Real D)=0
	Set a clipping plane.
virtual void	enableClipPlane (ushort index, bool enable)=0
	Enable the clipping plane.
virtual void	setInvertVertexWinding (bool invert)
	Sets whether or not vertex windings set should be inverted; this can be important for rendering reflections.
virtual void	setScissorTest (bool enabled, size_t left=0, size_t top=0, size_t right=800, size_t bottom=600)=0
	Sets the 'scissor region' ie the region of the target in which rendering can take place.
virtual void	clearFrameBuffer (unsigned int buffers, const ColourValue &colour=ColourValue::Black, Real depth=1.0f, unsigned short stencil=0)=0
	Clears one or more frame buffers on the active render target.
virtual Real	getHorizontalTexelOffset (void)=0
	Returns the horizontal texel offset value required for mapping texel origins to pixel origins in this rendersystem.
virtual Real	getVerticalTexelOffset (void)=0
	Returns the vertical texel offset value required for mapping texel origins to pixel origins in this rendersystem.
virtual Real	getMinimumDepthInputValue (void)=0
	Gets the minimum (closest) depth value to be used when rendering using identity transforms.
virtual Real	getMaximumDepthInputValue (void)=0
	Gets the maximum (farthest) depth value to be used when rendering using identity transforms.
void	setCurrentPassIterationCount (const size_t count)
	set the current multi pass count value.
virtual void	addListener (Listener *l)
	Adds a listener to the custom events that this render system can raise.
virtual void	removeListener (Listener *l)
	Remove a listener to the custom events that this render system can raise.
virtual const StringVector &	getRenderSystemEvents (void) const
	Gets a list of the rendersystem specific events that this rendersystem can raise.
Protected Types
typedef std::list< Listener * >	ListenerList
typedef std::list< HardwareOcclusionQuery * >	HardwareOcclusionQueryList
Protected Member Functions
bool	updatePassIterationRenderState (void)
	updates pass iteration rendering state including bound gpu program parameter pass iteration auto constant entry
virtual void	fireEvent (const String &name, const NameValuePairList *params=0)
	Internal method for firing a rendersystem event.
Protected Attributes
RenderTargetMap	mRenderTargets
	The render targets.
RenderTargetPriorityMap	mPrioritisedRenderTargets
	The render targets, ordered by priority.
RenderTarget *	mActiveRenderTarget
	The Active render target.
GpuProgramParametersSharedPtr	mActiveVertexGpuProgramParameters
	The Active GPU programs and gpu program parameters.
GpuProgramParametersSharedPtr	mActiveFragmentGpuProgramParameters
TextureManager *	mTextureManager
RenderSystemCapabilities *	mCapabilities
	Used to store the capabilities of the graphics card.
Viewport *	mActiveViewport
CullingMode	mCullingMode
bool	mVSync
bool	mWBuffer
size_t	mFaceCount
size_t	mVertexCount
Matrix4	mWorldMatrices [256]
	Saved set of world matrices.
ColourValue	mManualBlendColours [OGRE_MAX_TEXTURE_LAYERS][2]
	Saved manual colour blends.
bool	mInvertVertexWinding
size_t	mCurrentPassIterationCount
	number of times to render the current state
StringVector	mEventNames
	List of names of events this rendersystem may raise.
ListenerList	mEventListeners
HardwareOcclusionQueryList	mHwOcclusionQueries
bool	mVertexProgramBound
bool	mFragmentProgramBound

Detailed Description

Defines the functionality of a 3D API.

Remarks:: The RenderSystem class provides a base interface which abstracts the general functionality of the 3D API e.g. Direct3D or OpenGL. Whilst a few of the general methods have implementations, most of this class is abstract, requiring a subclass based on a specific API to be constructed to provide the full functionality. Note there are 2 levels to the interface - one which will be used often by the caller of the Ogre library, and one which is at a lower level and will be used by the other classes provided by Ogre. These lower level methods are prefixed with '_' to differentiate them. The advanced user of the library may use these lower level methods to access the 3D API at a more fundamental level (dealing direct with render states and rendering primitives), but still benefitting from Ogre's abstraction of exactly which 3D API is in use.

Author:: Steven Streeting

Version:: 1.0

Definition at line 110 of file OgreRenderSystem.h.

Member Typedef Documentation

typedef std::list<HardwareOcclusionQuery*> Ogre::RenderSystem::HardwareOcclusionQueryList [protected]

Definition at line 1111 of file OgreRenderSystem.h.

typedef std::list<Listener*> Ogre::RenderSystem::ListenerList [protected]

Definition at line 1108 of file OgreRenderSystem.h.

typedef MapIterator<Ogre::RenderTargetMap> Ogre::RenderSystem::RenderTargetIterator

Iterator over RenderTargets.

Definition at line 399 of file OgreRenderSystem.h.
Referenced by getRenderTargetIterator().

Constructor & Destructor Documentation

Ogre::RenderSystem::RenderSystem ( )

Default Constructor.

virtual Ogre::RenderSystem::~RenderSystem ( ) [virtual]

Destructor.

Member Function Documentation

virtual void Ogre::RenderSystem::_applyObliqueDepthProjection ( Matrix4 & matrix,

const Plane & plane,

bool forGpuProgram

) [pure virtual]

Update a perspective projection matrix to use 'oblique depth projection'.

Remarks:
This method can be used to change the nature of a perspective transform in order to make the near plane not perpendicular to the camera view direction, but to be at some different orientation. This can be useful for performing arbitrary clipping (e.g. to a reflection plane) which could otherwise only be done using user clip planes, which are more expensive, and not necessarily supported on all cards.

Parameters:

matrix The existing projection matrix. Note that this must be a perspective transform (not orthographic), and must not have already been altered by this method. The matrix will be altered in-place.

plane The plane which is to be used as the clipping plane. This plane must be in CAMERA (view) space.

forGpuProgram Is this for use with a Gpu program or fixed-function

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_beginFrame ( void ) [pure virtual]

Signifies the beginning of a frame, ie the start of rendering on a single viewport.
Will occur several times per complete frame if multiple viewports exist.
Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_beginGeometryCount ( void ) [virtual]

The RenderSystem will keep a count of tris rendered, this resets the count.

virtual void Ogre::RenderSystem::_convertProjectionMatrix ( const Matrix4 & matrix,

Matrix4 & dest,

bool forGpuProgram = false

) [pure virtual]

Converts a uniform projection matrix to suitable for this render system.

Remarks:
Because different APIs have different requirements (some incompatible) for the projection matrix, this method allows each to implement their own correctly and pass back a generic OGRE matrix for storage in the engine.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_disableTextureUnit ( size_t texUnit ) [virtual]

Turns off a texture unit.

virtual void Ogre::RenderSystem::_disableTextureUnitsFrom ( size_t texUnit ) [virtual]

Disables all texture units from the given unit upwards.

virtual void Ogre::RenderSystem::_endFrame ( void ) [pure virtual]

Ends rendering of a frame to the current viewport.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual CullingMode Ogre::RenderSystem::_getCullingMode ( void ) const [virtual]

virtual unsigned int Ogre::RenderSystem::_getFaceCount ( void ) const [virtual]

Reports the number of tris rendered since the last _beginGeometryCount call.

virtual unsigned int Ogre::RenderSystem::_getVertexCount ( void ) const [virtual]

Reports the number of vertices passed to the renderer since the last _beginGeometryCount call.

virtual Viewport* Ogre::RenderSystem::_getViewport ( void ) [virtual]

Get the current active viewport for rendering.

virtual void Ogre::RenderSystem::_initRenderTargets ( void ) [virtual]

Utility method for initialising all render targets attached to this rendering system.

virtual void Ogre::RenderSystem::_makeOrthoMatrix ( const Radian & fovy,

Real aspect,

Real nearPlane,

Real farPlane,

Matrix4 & dest,

bool forGpuProgram = false

) [pure virtual]

Builds an orthographic projection matrix suitable for this render system.

Remarks:
Because different APIs have different requirements (some incompatible) for the projection matrix, this method allows each to implement their own correctly and pass back a generic OGRE matrix for storage in the engine.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_makeProjectionMatrix ( Real left,

Real right,

Real bottom,

Real top,

Real nearPlane,

Real farPlane,

Matrix4 & dest,

bool forGpuProgram = false

) [pure virtual]

Builds a perspective projection matrix for the case when frustum is not centered around camera.

Remarks:
Viewport coordinates are in camera coordinate frame, i.e. camera is at the origin.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_makeProjectionMatrix ( const Radian & fovy,

Real aspect,

Real nearPlane,

Real farPlane,

Matrix4 & dest,

bool forGpuProgram = false

) [pure virtual]

Builds a perspective projection matrix suitable for this render system.

Remarks:
Because different APIs have different requirements (some incompatible) for the projection matrix, this method allows each to implement their own correctly and pass back a generic OGRE matrix for storage in the engine.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_notifyCameraRemoved ( const Camera * cam ) [virtual]

Utility method to notify all render targets that a camera has been removed, incase they were referring to it as their viewer.

virtual void Ogre::RenderSystem::_render ( const RenderOperation & op ) [virtual]

Render something to the active viewport.
Low-level rendering interface to perform rendering operations. Unlikely to be used directly by client applications, since the SceneManager and various support classes will be responsible for calling this method. Can only be called between _beginScene and _endScene

Parameters:

op A rendering operation instance, which contains details of the operation to be performed.

Reimplemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setAlphaRejectSettings ( CompareFunction func,

unsigned char value

) [pure virtual]

Sets the global alpha rejection approach for future renders.
By default images are rendered regardless of texture alpha. This method lets you change that.
Parameters:

func The comparison function which must pass for a pixel to be written.

val The value to compare each pixels alpha value to (0-255)

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setColourBufferWriteEnabled ( bool red,

bool green,

bool blue,

bool alpha

) [pure virtual]

Sets whether or not colour buffer writing is enabled, and for which channels.

Remarks:
For some advanced effects, you may wish to turn off the writing of certain colour channels, or even all of the colour channels so that only the depth buffer is updated in a rendering pass. However, the chances are that you really want to use this option through the Material class.

Parameters:

red,green,blue,alpha Whether writing is enabled for each of the 4 colour channels.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setCullingMode ( CullingMode mode ) [pure virtual]

Sets the culling mode for the render system based on the 'vertex winding'.
A typical way for the rendering engine to cull triangles is based on the 'vertex winding' of triangles. Vertex winding refers to the direction in which the vertices are passed or indexed to in the rendering operation as viewed from the camera, and will wither be clockwise or anticlockwise (that's 'counterclockwise' for you Americans out there ;) The default is CULL_CLOCKWISE i.e. that only triangles whose vertices are passed/indexed in anticlockwise order are rendered - this is a common approach and is used in 3D studio models for example. You can alter this culling mode if you wish but it is not advised unless you know what you are doing. You may wish to use the CULL_NONE option for mesh data that you cull yourself where the vertex winding is uncertain.
Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setDepthBias ( ushort bias ) [pure virtual]

Sets the depth bias, NB you should use the Material version of this.

Remarks:
When polygons are coplanar, you can get problems with 'depth fighting' where the pixels from the two polys compete for the same screen pixel. This is particularly a problem for decals (polys attached to another surface to represent details such as bulletholes etc.).

A way to combat this problem is to use a depth bias to adjust the depth buffer value used for the decal such that it is slightly higher than the true value, ensuring that the decal appears on top.

Parameters:

bias The bias value, should be between 0 and 16.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setDepthBufferCheckEnabled ( bool enabled = true ) [pure virtual]

Sets whether or not the depth buffer check is performed before a pixel write.

Parameters:

enabled If true, the depth buffer is tested for each pixel and the frame buffer is only updated if the depth function test succeeds. If false, no test is performed and pixels are always written.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setDepthBufferFunction ( CompareFunction func = CMPF_LESS_EQUAL ) [pure virtual]

Sets the comparison function for the depth buffer check.
Advanced use only - allows you to choose the function applied to compare the depth values of new and existing pixels in the depth buffer. Only an issue if the deoth buffer check is enabled (see _setDepthBufferCheckEnabled)
Parameters:

func The comparison between the new depth and the existing depth which must return true for the new pixel to be written.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setDepthBufferParams ( bool depthTest = true,

bool depthWrite = true,

CompareFunction depthFunction = CMPF_LESS_EQUAL

) [pure virtual]

Sets the mode of operation for depth buffer tests from this point onwards.
Sometimes you may wish to alter the behaviour of the depth buffer to achieve special effects. Because it's unlikely that you'll set these options for an entire frame, but rather use them to tweak settings between rendering objects, this is an internal method (indicated by the '_' prefix) which will be used by a SceneManager implementation rather than directly from the client application. If this method is never called the settings are automatically the same as the default parameters.
Parameters:

depthTest If true, the depth buffer is tested for each pixel and the frame buffer is only updated if the depth function test succeeds. If false, no test is performed and pixels are always written.

depthWrite If true, the depth buffer is updated with the depth of the new pixel if the depth test succeeds. If false, the depth buffer is left unchanged even if a new pixel is written.

depthFunction Sets the function required for the depth test.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setDepthBufferWriteEnabled ( bool enabled = true ) [pure virtual]

Sets whether or not the depth buffer is updated after a pixel write.

Parameters:

enabled If true, the depth buffer is updated with the depth of the new pixel if the depth test succeeds. If false, the depth buffer is left unchanged even if a new pixel is written.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setFog ( FogMode mode = FOG_NONE,

const ColourValue & colour = ColourValue::White,

Real expDensity = 1.0,

Real linearStart = 0.0,

Real linearEnd = 1.0

) [pure virtual]

Sets the fogging mode for future geometry.

Parameters:

mode Set up the mode of fog as described in the FogMode enum, or set to FOG_NONE to turn off.

colour The colour of the fog. Either set this to the same as your viewport background colour, or to blend in with a skydome or skybox.

expDensity The density of the fog in FOG_EXP or FOG_EXP2 mode, as a value between 0 and 1. The default is 1. i.e. completely opaque, lower values can mean that fog never completely obscures the scene.

linearStart Distance at which linear fog starts to encroach. The distance must be passed as a parametric value between 0 and 1, with 0 being the near clipping plane, and 1 being the far clipping plane. Only applicable if mode is FOG_LINEAR.

linearEnd Distance at which linear fog becomes completely opaque.The distance must be passed as a parametric value between 0 and 1, with 0 being the near clipping plane, and 1 being the far clipping plane. Only applicable if mode is FOG_LINEAR.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setPointParameters ( Real size,

bool attenuationEnabled,

Real constant,

Real linear,

Real quadratic,

Real minSize,

Real maxSize

) [pure virtual]

Sets the size of points and how they are attenuated with distance.

Remarks:
When performing point rendering or point sprite rendering, point size can be attenuated with distance. The equation for doing this is attenuation = 1 / (constant + linear * dist + quadratic * d^2) .

For example, to disable distance attenuation (constant screensize) you would set constant to 1, and linear and quadratic to 0. A standard perspective attenuation would be 0, 1, 0 respectively.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setPointSpritesEnabled ( bool enabled ) [pure virtual]

Sets whether or not rendering points using OT_POINT_LIST will render point sprites (textured quads) or plain points.

Parameters:

enabled True enables point sprites, false returns to normal point rendering.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setPolygonMode ( PolygonMode level ) [pure virtual]

Sets how to rasterise triangles, as points, wireframe or solid polys.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setProjectionMatrix ( const Matrix4 & m ) [pure virtual]

Sets the projection transform matrix.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setSceneBlending ( SceneBlendFactor sourceFactor,

SceneBlendFactor destFactor

) [pure virtual]

Sets the global blending factors for combining subsequent renders with the existing frame contents.
The result of the blending operation is:
final = (texture * sourceFactor) + (pixel * destFactor) Each of the factors is specified as one of a number of options, as specified in the SceneBlendFactor enumerated type.
Parameters:

sourceFactor The source factor in the above calculation, i.e. multiplied by the texture colour components.

destFactor The destination factor in the above calculation, i.e. multiplied by the pixel colour components.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setSurfaceParams ( const ColourValue & ambient,

const ColourValue & diffuse,

const ColourValue & specular,

const ColourValue & emissive,

Real shininess,

TrackVertexColourType tracking = TVC_NONE

) [pure virtual]

Sets the surface properties to be used for future rendering.
This method sets the the properties of the surfaces of objects to be rendered after it. In this context these surface properties are the amount of each type of light the object reflects (determining it's colour under different types of light), whether it emits light itself, and how shiny it is. Textures are not dealt with here, see the _setTetxure method for details. This method is used by _setMaterial so does not need to be called direct if that method is being used.

Parameters:

ambient The amount of ambient (sourceless and directionless) light an object reflects. Affected by the colour/amount of ambient light in the scene.

diffuse The amount of light from directed sources that is reflected (affected by colour/amount of point, directed and spot light sources)

specular The amount of specular light reflected. This is also affected by directed light sources but represents the colour at the highlights of the object.

emissive The colour of light emitted from the object. Note that this will make an object seem brighter and not dependent on lights in the scene, but it will not act as a light, so will not illuminate other objects. Use a light attached to the same SceneNode as the object for this purpose.

shininess A value which only has an effect on specular highlights (so specular must be non-black). The higher this value, the smaller and crisper the specular highlights will be, imitating a more highly polished surface. This value is not constrained to 0.0-1.0, in fact it is likely to be more (10.0 gives a modest sheen to an object).

tracking A bit field that describes which of the ambient, diffuse, specular and emissive colours follow the vertex colour of the primitive. When a bit in this field is set its ColourValue is ignored. This is a combination of TVC_AMBIENT, TVC_DIFFUSE, TVC_SPECULAR(note that the shininess value is still taken from shininess) and TVC_EMISSIVE. TVC_NONE means that there will be no material property tracking the vertex colours.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setTexture ( size_t unit,

bool enabled,

const String & texname

) [pure virtual]

Sets the status of a single texture stage.
Sets the details of a texture stage, to be used for all primitives rendered afterwards. User processes would not normally call this direct unless rendering primitives themselves - the SubEntity class is designed to manage materials for objects. Note that this method is called by _setMaterial.

Parameters:

unit The index of the texture unit to modify. Multitexturing hardware can support multiple units (see RenderSystemCapabilites::numTextureUnits)

enabled Boolean to turn the unit on/off

texname The name of the texture to use - this should have already been loaded with TextureManager::load.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setTextureAddressingMode ( size_t unit,

const TextureUnitState::UVWAddressingMode & uvw

) [pure virtual]

Sets the texture addressing mode for a texture unit.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setTextureBlendMode ( size_t unit,

const LayerBlendModeEx & bm

) [pure virtual]

Sets the texture blend modes from a TextureUnitState record.
Meant for use internally only - apps should use the Material and TextureUnitState classes.
Parameters:

unit Texture unit as above

bm Details of the blending mode

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setTextureBorderColour ( size_t unit,

const ColourValue & colour

) [pure virtual]

Sets the texture border colour for a texture unit.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setTextureCoordCalculation ( size_t unit,

TexCoordCalcMethod m,

const Frustum * frustum = 0

) [pure virtual]

Sets a method for automatically calculating texture coordinates for a stage.
Should not be used by apps - for use by Ogre only.
Parameters:

unit Texture unit as above

m Calculation method to use

frustum Optional Frustum param, only used for projective effects

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setTextureCoordSet ( size_t unit,

size_t index

) [pure virtual]

Sets the texture coordinate set to use for a texture unit.
Meant for use internally - not generally used directly by apps - the Material and TextureUnitState classes let you manage textures far more easily.

Parameters:

unit Texture unit as above

index The index of the texture coordinate set to use.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setTextureLayerAnisotropy ( size_t unit,

unsigned int maxAnisotropy

) [pure virtual]

Sets the maximal anisotropy for the specified texture unit.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setTextureMatrix ( size_t unit,

const Matrix4 & xform

) [pure virtual]

Sets the texture coordinate transformation matrix for a texture unit.

Parameters:

unit Texture unit to affect

xform The 4x4 matrix

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setTextureUnitFiltering ( size_t unit,

FilterType ftype,

FilterOptions filter

) [pure virtual]

Sets a single filter for a given texture unit.

Parameters:

unit The texture unit to set the filtering options for

ftype The filter type

filter The filter to be used

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setTextureUnitFiltering ( size_t unit,

FilterOptions minFilter,

FilterOptions magFilter,

FilterOptions mipFilter

) [virtual]

Sets the filtering options for a given texture unit.

Parameters:

unit The texture unit to set the filtering options for

minFilter The filter used when a texture is reduced in size

magFilter The filter used when a texture is magnified

mipFilter The filter used between mipmap levels, FO_NONE disables mipmapping

virtual void Ogre::RenderSystem::_setTextureUnitSettings ( size_t texUnit,

TextureUnitState & tl

) [virtual]

Utility function for setting all the properties of a texture unit at once.
This method is also worth using over the individual texture unit settings because it only sets those settings which are different from the current settings for this unit, thus minimising render state changes.

virtual void Ogre::RenderSystem::_setViewMatrix ( const Matrix4 & m ) [pure virtual]

Sets the view transform matrix.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setViewport ( Viewport * vp ) [pure virtual]

Sets the provided viewport as the active one for future rendering operations.
This viewport is aware of it's own camera and render target. Must be implemented by subclass.

Parameters:

target Pointer to the appropriate viewport.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_setWorldMatrices ( const Matrix4 * m,

unsigned short count

) [virtual]

Sets multiple world matrices (vertex blending).

virtual void Ogre::RenderSystem::_setWorldMatrix ( const Matrix4 & m ) [pure virtual]

Sets the world transform matrix.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::_updateAllRenderTargets ( void ) [virtual]

Internal method for updating all render targets attached to this rendering system.

virtual void Ogre::RenderSystem::_useLights ( const LightList & lights,

unsigned short limit

) [pure virtual]

Tells the rendersystem to use the attached set of lights (and no others) up to the number specified (this allows the same list to be used with different count limits).

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::addListener ( Listener * l ) [virtual]

Adds a listener to the custom events that this render system can raise.

Remarks:
Some render systems have quite specific, internally generated events that the application may wish to be notified of. Many applications don't have to worry about these events, and can just trust OGRE to handle them, but if you want to know, you can add a listener here.

Events are raised very generically by string name. Perhaps the most common example of a render system specific event is the loss and restoration of a device in DirectX; which OGRE deals with, but you may wish to know when it happens.

See also:
RenderSystem::getRenderSystemEvents

virtual void Ogre::RenderSystem::attachRenderTarget ( RenderTarget & target ) [virtual]

Attaches the passed render target to the render system.

virtual void Ogre::RenderSystem::bindGpuProgram ( GpuProgram * prg ) [virtual]

Binds a given GpuProgram (but not the parameters).

Remarks:
Only one GpuProgram of each type can be bound at once, binding another one will simply replace the exsiting one.

Reimplemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::bindGpuProgramParameters ( GpuProgramType gptype,

GpuProgramParametersSharedPtr params

) [pure virtual]

Bind Gpu program parameters.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::bindGpuProgramPassIterationParameters ( GpuProgramType gptype ) [pure virtual]

Only binds Gpu program parameters used for passes that have more than one iteration rendering.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::clearFrameBuffer ( unsigned int buffers,

const ColourValue & colour = ColourValue::Black,

Real depth = 1.0f,

unsigned short stencil = 0

) [pure virtual]

Clears one or more frame buffers on the active render target.

Parameters:

buffers Combination of one or more elements of FrameBufferType denoting which buffers are to be cleared

colour The colour to clear the colour buffer with, if enabled

depth The value to initialise the depth buffer with, if enabled

stencil The value to initialise the stencil buffer with, if enabled.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::convertColourValue ( const ColourValue & colour,

uint32 * pDest

) [virtual]

Generates a packed data version of the passed in ColourValue suitable for use as with this RenderSystem.

Remarks:
Since different render systems have different colour data formats (eg RGBA for GL, ARGB for D3D) this method allows you to use 1 method for all.

Parameters:

colour The colour to convert

pDest Pointer to location to put the result.

virtual HardwareOcclusionQuery* Ogre::RenderSystem::createHardwareOcclusionQuery ( void ) [pure virtual]

Create an object for performing hardware occlusion queries.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual MultiRenderTarget* Ogre::RenderSystem::createMultiRenderTarget ( const String & name ) [pure virtual]

Create a MultiRenderTarget, which is a render target that renders to multiple RenderTextures at once.
Surfaces can be bound and unbound at will. This fails if mCapabilities->numMultiRenderTargets() is smaller than 2.
Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

RenderTexture* Ogre::RenderSystem::createRenderTexture ( const String & name,

unsigned int width,

unsigned int height,

TextureType texType = TEX_TYPE_2D,

PixelFormat internalFormat = PF_X8R8G8B8,

const NameValuePairList * miscParams = 0

)

Creates and registers a render texture object.

Parameters:

name The name for the new render texture. Note that names must be unique.

width The requested width for the render texture. See Remarks for more info.

height The requested width for the render texture. See Remarks for more info.

texType The type of texture; defaults to TEX_TYPE_2D

internalFormat The internal format of the texture; defaults to PF_X8R8G8B8

miscParams This parameter is ignored.

Returns:
On succes, a pointer to a new platform-dependernt, RenderTexture-derived class is returned. On failiure, NULL is returned.

Remarks:
Because a render texture is basically a wrapper around a texture object, the width and height parameters of this method just hint the preferred size for the texture. Depending on the hardware driver or the underlying API, these values might change when the texture is created. The same applies to the internalFormat parameter.

Deprecated:
This method is deprecated, and exists only for backward compatibility. You can create arbitrary rendertextures with the TextureManager::createManual call with usage TU_RENDERTEXTURE.

Reimplemented in Ogre::D3D9RenderSystem.

virtual RenderWindow* Ogre::RenderSystem::createRenderWindow ( const String & name,

unsigned int width,

unsigned int height,

bool fullScreen,

const NameValuePairList * miscParams = 0

) [pure virtual]

Creates a new rendering window.

Remarks:
This method creates a new rendering window as specified by the paramteters. The rendering system could be responible for only a single window (e.g. in the case of a game), or could be in charge of multiple ones (in the case of a level editor). The option to create the window as a child of another is therefore given. This method will create an appropriate subclass of RenderWindow depending on the API and platform implementation.

After creation, this window can be retrieved using getRenderTarget().

Parameters:

name The name of the window. Used in other methods later like setRenderTarget and getRenderWindow.

width The width of the new window.

height The height of the new window.

fullScreen Specify true to make the window full screen without borders, title bar or menu bar.

miscParams A NameValuePairList describing the other parameters for the new rendering window. Options are case sensitive. Unrecognised parameters will be ignored silently. These values might be platform dependent, but these are present for all platorms unless indicated otherwise:

Key: "title" Description: The title of the window that will appear in the title bar Values: string Default: RenderTarget name
Key: "colourDepth" Description: Colour depth of the resulting rendering window; only applies if fullScreen is set. Values: 16 or 32 Default: desktop depth Notes: [W32 specific]
Key: "left" Description: screen x coordinate from left Values: positive integers Default: 'center window on screen' Notes: Ignored in case of full screen
Key: "top" Description: screen y coordinate from top Values: positive integers Default: 'center window on screen' Notes: Ignored in case of full screen
Key: "depthBuffer" [DX9 specific] Description: Use depth buffer Values: false or true Default: true
Key: "externalWindowHandle" [API specific] Description: External window handle, for embedding the OGRE context Values: positive integer for W32 (HWND handle) poslong:posint:poslong (display*:screen:windowHandle) or poslong:posint:poslong:poslong (display*:screen:windowHandle:XVisualInfo*) for GLX Default: 0 (None)
Key: "parentWindowHandle" [API specific] Description: Parent window handle, for embedding the OGRE context Values: positive integer for W32 (HWND handle) poslong:posint:poslong for GLX (display*:screen:windowHandle) Default: 0 (None)
Key: "FSAA" Description: Full screen antialiasing factor Values: 0,2,4,6,... Default: 0
Key: "displayFrequency" Description: Display frequency rate, for fullscreen mode Values: 60...? Default: Desktop vsync rate
Key: "vsync" Description: Synchronize buffer swaps to vsync Values: true, false Default: 0
Key: "border" Description: The type of window border (in windowed mode) Values: none, fixed, resize Default: resize
Key: "outerDimensions" Description: Whether the width/height is expressed as the size of the outer window, rather than the content area Values: true, false Default: false
Key: "useNVPerfHUD" [DX9 specific] Description: Enable the use of nVidia NVPerfHUD Values: true, false Default: false
Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::destroyHardwareOcclusionQuery ( HardwareOcclusionQuery * hq ) [virtual]

Destroy a hardware occlusion query object.

virtual void Ogre::RenderSystem::destroyRenderTarget ( const String & name ) [virtual]

Destroys a render target of any sort.

Reimplemented in Ogre::D3D9RenderSystem.

virtual void Ogre::RenderSystem::destroyRenderTexture ( const String & name ) [virtual]

Destroys a render texture.

virtual void Ogre::RenderSystem::destroyRenderWindow ( const String & name ) [virtual]

Destroys a render window.

virtual RenderTarget* Ogre::RenderSystem::detachRenderTarget ( const String & name ) [virtual]

Detaches the render target with the passed name from the render system and returns a pointer to it.

Note:
If the render target cannot be found, NULL is returned.

virtual void Ogre::RenderSystem::enableClipPlane ( ushort index,

bool enable

) [pure virtual]

Enable the clipping plane.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::fireEvent ( const String & name,

const NameValuePairList * params = 0

) [protected, virtual]

Internal method for firing a rendersystem event.

const RenderSystemCapabilities* Ogre::RenderSystem::getCapabilities ( void ) const

Gets the capabilities of the render system.

Definition at line 893 of file OgreRenderSystem.h.

virtual VertexElementType Ogre::RenderSystem::getColourVertexElementType ( void ) const [pure virtual]

Get the native VertexElementType for a compact 32-bit colour value for this rendersystem.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual ConfigOptionMap& Ogre::RenderSystem::getConfigOptions ( void ) [pure virtual]

Returns the details of this API's configuration options.

Remarks:
Each render system must be able to inform the world of what options must/can be specified for it's operation.

These are passed as strings for portability, but grouped into a structure (_ConfigOption) which includes both options and current value.

Note that the settings returned from this call are affected by the options that have been set so far, since some options are interdependent.

This routine is called automatically by the default configuration dialogue produced by Root::showConfigDialog or may be used by the caller for custom settings dialogs

Returns:
A 'map' of options, i.e. a list of options which is also indexed by option name.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual String Ogre::RenderSystem::getErrorDescription ( long errorNumber ) const [pure virtual]

Returns a description of an error code.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual Real Ogre::RenderSystem::getHorizontalTexelOffset ( void ) [pure virtual]

Returns the horizontal texel offset value required for mapping texel origins to pixel origins in this rendersystem.

Remarks:
Since rendersystems sometimes disagree on the origin of a texel, mapping from texels to pixels can sometimes be problematic to implement generically. This method allows you to retrieve the offset required to map the origin of a texel to the origin of a pixel in the horizontal direction.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual Real Ogre::RenderSystem::getMaximumDepthInputValue ( void ) [pure virtual]

Gets the maximum (farthest) depth value to be used when rendering using identity transforms.

Remarks:
When using identity transforms you can manually set the depth of a vertex; however the input values required differ per rendersystem. This method lets you retrieve the correct value.

See also:
Renderable::useIdentityView, Renderable::useIdentityProjection

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual Real Ogre::RenderSystem::getMinimumDepthInputValue ( void ) [pure virtual]

Gets the minimum (closest) depth value to be used when rendering using identity transforms.

Remarks:
When using identity transforms you can manually set the depth of a vertex; however the input values required differ per rendersystem. This method lets you retrieve the correct value.

See also:
Renderable::useIdentityView, Renderable::useIdentityProjection

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual const String& Ogre::RenderSystem::getName ( void ) const [pure virtual]

Returns the name of the rendering system.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual const StringVector& Ogre::RenderSystem::getRenderSystemEvents ( void ) const [virtual]

Gets a list of the rendersystem specific events that this rendersystem can raise.

See also:
RenderSystem::addListener

Definition at line 1051 of file OgreRenderSystem.h.
References Ogre::StringVector.

virtual RenderTarget* Ogre::RenderSystem::getRenderTarget ( const String & name ) [virtual]

Returns a pointer to the render target with the passed name, or NULL if that render target cannot be found.

virtual RenderTargetIterator Ogre::RenderSystem::getRenderTargetIterator ( void ) [virtual]

Returns a specialised MapIterator over all render targets attached to the RenderSystem.

Definition at line 402 of file OgreRenderSystem.h.
References RenderTargetIterator.

virtual Real Ogre::RenderSystem::getVerticalTexelOffset ( void ) [pure virtual]

Returns the vertical texel offset value required for mapping texel origins to pixel origins in this rendersystem.

Remarks:
Since rendersystems sometimes disagree on the origin of a texel, mapping from texels to pixels can sometimes be problematic to implement generically. This method allows you to retrieve the offset required to map the origin of a texel to the origin of a pixel in the vertical direction.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

bool Ogre::RenderSystem::getWaitForVerticalBlank ( void ) const

Returns true if the system is synchronising frames with the monitor vertical blank.

bool Ogre::RenderSystem::getWBufferEnabled ( void ) const

Returns true if the renderer will try to use W-buffers when avalible.

virtual RenderWindow* Ogre::RenderSystem::initialise ( bool autoCreateWindow,

const String & windowTitle = "OGRE Render Window"

) [virtual]

Start up the renderer using the settings selected (Or the defaults if none have been selected).

Remarks:
Called by Root::setRenderSystem. Shouldn't really be called directly, although this can be done if the app wants to.

Parameters:

autoCreateWindow If true, creates a render window automatically, based on settings chosen so far. This saves an extra call to RenderSystem::createRenderWindow for the main render window.

If an application has more specific window requirements, however (e.g. a level design app), it should specify false for this parameter and do it manually.

Returns:
A pointer to the automatically created window, if requested, otherwise null.

Reimplemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual bool Ogre::RenderSystem::isGpuProgramBound ( GpuProgramType gptype ) [virtual]

Returns whether or not a Gpu program of the given type is currently bound.

virtual void Ogre::RenderSystem::reinitialise ( void ) [pure virtual]

Restart the renderer (normally following a change in settings).

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::removeListener ( Listener * l ) [virtual]

Remove a listener to the custom events that this render system can raise.

virtual void Ogre::RenderSystem::setAmbientLight ( float r,

float g,

float b

) [pure virtual]

Sets the colour & strength of the ambient (global directionless) light in the world.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::setClipPlane ( ushort index,

Real A,

Real B,

Real C,

Real D

) [pure virtual]

Set a clipping plane.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::setClipPlane ( ushort index,

const Plane & p

) [virtual]

Set a clipping plane.

virtual void Ogre::RenderSystem::setClipPlanes ( const PlaneList & clipPlanes ) [pure virtual]

sets the clipping region.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::setConfigOption ( const String & name,

const String & value

) [pure virtual]

Sets an option for this API.

Remarks:
Used to confirm the settings (normally chosen by the user) in order to make the renderer able to initialise with the settings as required. This may be video mode, D3D driver, full screen / windowed etc. Called automatically by the default configuration dialog, and by the restoration of saved settings. These settings are stored and only activated when RenderSystem::initialise or RenderSystem::reinitialise are called.

If using a custom configuration dialog, it is advised that the caller calls RenderSystem::getConfigOptions again, since some options can alter resulting from a selection.

Parameters:

name The name of the option to alter.

value The value to set the option to.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

void Ogre::RenderSystem::setCurrentPassIterationCount ( const size_t count )

set the current multi pass count value.
This must be set prior to calling _render() if multiple renderings of the same pass state are required.
Parameters:

count Number of times to render the current state.

Definition at line 1009 of file OgreRenderSystem.h.

virtual void Ogre::RenderSystem::setInvertVertexWinding ( bool invert ) [virtual]

Sets whether or not vertex windings set should be inverted; this can be important for rendering reflections.

virtual void Ogre::RenderSystem::setLightingEnabled ( bool enabled ) [pure virtual]

Sets whether or not dynamic lighting is enabled.

Parameters:

enabled If true, dynamic lighting is performed on geometry with normals supplied, geometry without normals will not be displayed. If false, no lighting is applied and all geometry will be full brightness.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::setNormaliseNormals ( bool normalise ) [pure virtual]

Sets whether or not normals are to be automatically normalised.

Remarks:
This is useful when, for example, you are scaling SceneNodes such that normals may not be unit-length anymore. Note though that this has an overhead so should not be turn on unless you really need it.

You should not normally call this direct unless you are rendering world geometry; set it on the Renderable because otherwise it will be overridden by material settings.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::setScissorTest ( bool enabled,

size_t left = 0,

size_t top = 0,

size_t right = 800,

size_t bottom = 600

) [pure virtual]

Sets the 'scissor region' ie the region of the target in which rendering can take place.

Remarks:
This method allows you to 'mask off' rendering in all but a given rectangular area as identified by the parameters to this method.

Note:
Not all systems support this method. Check the RenderSystemCapabilities for the RSC_SCISSOR_TEST capability to see if it is supported.

Parameters:

enabled True to enable the scissor test, false to disable it.

left,top,right,bottom The location of the corners of the rectangle, expressed in pixels.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::setShadingType ( ShadeOptions so ) [pure virtual]

Sets the type of light shading required (default = Gouraud).

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::setStencilBufferParams ( CompareFunction func = CMPF_ALWAYS_PASS,

uint32 refValue = 0,

uint32 mask = 0xFFFFFFFF,

StencilOperation stencilFailOp = SOP_KEEP,

StencilOperation depthFailOp = SOP_KEEP,

StencilOperation passOp = SOP_KEEP,

bool twoSidedOperation = false

) [pure virtual]

This method allows you to set all the stencil buffer parameters in one call.

Remarks:
The stencil buffer is used to mask out pixels in the render target, allowing you to do effects like mirrors, cut-outs, stencil shadows and more. Each of your batches of rendering is likely to ignore the stencil buffer, update it with new values, or apply it to mask the output of the render. The stencil test is:
(Reference Value & Mask) CompareFunction (Stencil Buffer Value & Mask)
The result of this will cause one of 3 actions depending on whether the test fails, succeeds but with the depth buffer check still failing, or succeeds with the depth buffer check passing too.

Unlike other render states, stencilling is left for the application to turn on and off when it requires. This is because you are likely to want to change parameters between batches of arbitrary objects and control the ordering yourself. In order to batch things this way, you'll want to use OGRE's separate render queue groups (see RenderQueue) and register a RenderQueueListener to get notifications between batches.

There are individual state change methods for each of the parameters set using this method. Note that the default values in this method represent the defaults at system start up too.

Parameters:

func The comparison function applied.

refValue The reference value used in the comparison

mask The bitmask applied to both the stencil value and the reference value before comparison

stencilFailOp The action to perform when the stencil check fails

depthFailOp The action to perform when the stencil check passes, but the depth buffer check still fails

passOp The action to take when both the stencil and depth check pass.

twoSidedOperation If set to true, then if you render both back and front faces (you'll have to turn off culling) then these parameters will apply for front faces, and the inverse of them will happen for back faces (keep remains the same).

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::setStencilCheckEnabled ( bool enabled ) [pure virtual]

Turns stencil buffer checking on or off.

Remarks:
Stencilling (masking off areas of the rendering target based on the stencil buffer) canbe turned on or off using this method. By default, stencilling is disabled.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::setVertexBufferBinding ( VertexBufferBinding * binding ) [pure virtual]

Sets the current vertex buffer binding state.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::setVertexDeclaration ( VertexDeclaration * decl ) [pure virtual]

Sets the current vertex declaration, ie the source of vertex data.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

void Ogre::RenderSystem::setWaitForVerticalBlank ( bool enabled )

Defines whether or now fullscreen render windows wait for the vertical blank before flipping buffers.

Remarks:
By default, all rendering windows wait for a vertical blank (when the CRT beam turns off briefly to move from the bottom right of the screen back to the top left) before flipping the screen buffers. This ensures that the image you see on the screen is steady. However it restricts the frame rate to the refresh rate of the monitor, and can slow the frame rate down. You can speed this up by not waiting for the blank, but this has the downside of introducing 'tearing' artefacts where part of the previous frame is still displayed as the buffers are switched. Speed vs quality, you choose.

Note:
Has NO effect on windowed mode render targets. Only affects fullscreen mode.

Parameters:

enabled If true, the system waits for vertical blanks - quality over speed. If false it doesn't - speed over quality.

void Ogre::RenderSystem::setWBufferEnabled ( bool enabled )

Sets whether or not W-buffers are enabled if they are avalible for this renderer.

Parameters:

enabled If true and the renderer supports them W-buffers will be used. If false W-buffers will not be used even if avalible. W-buffers are enabled by default for 16bit depth buffers and disabled for all other depths.

virtual void Ogre::RenderSystem::shutdown ( void ) [virtual]

Shutdown the renderer and cleanup resources.

Reimplemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

virtual void Ogre::RenderSystem::unbindGpuProgram ( GpuProgramType gptype ) [virtual]

Unbinds GpuPrograms of a given GpuProgramType.

Remarks:
This returns the pipeline to fixed-function processing for this type.

Reimplemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

bool Ogre::RenderSystem::updatePassIterationRenderState ( void ) [protected]

updates pass iteration rendering state including bound gpu program parameter pass iteration auto constant entry

Returns:
True if more iterations are required

virtual String Ogre::RenderSystem::validateConfigOptions ( void ) [pure virtual]

Validates the options set for the rendering system, returning a message if there are problems.

Note:
If the returned string is empty, there are no problems.

Implemented in Ogre::D3D9RenderSystem, and Ogre::GLRenderSystem.

Member Data Documentation

GpuProgramParametersSharedPtr Ogre::RenderSystem::mActiveFragmentGpuProgramParameters [protected]

Definition at line 1063 of file OgreRenderSystem.h.

RenderTarget* Ogre::RenderSystem::mActiveRenderTarget [protected]

The Active render target.

Definition at line 1060 of file OgreRenderSystem.h.

GpuProgramParametersSharedPtr Ogre::RenderSystem::mActiveVertexGpuProgramParameters [protected]

The Active GPU programs and gpu program parameters.

Definition at line 1062 of file OgreRenderSystem.h.

Viewport* Ogre::RenderSystem::mActiveViewport [protected]

Definition at line 1075 of file OgreRenderSystem.h.

RenderSystemCapabilities* Ogre::RenderSystem::mCapabilities [protected]

Used to store the capabilities of the graphics card.

Definition at line 1072 of file OgreRenderSystem.h.

CullingMode Ogre::RenderSystem::mCullingMode [protected]

Definition at line 1077 of file OgreRenderSystem.h.

size_t Ogre::RenderSystem::mCurrentPassIterationCount [protected]

number of times to render the current state

Definition at line 1094 of file OgreRenderSystem.h.

ListenerList Ogre::RenderSystem::mEventListeners [protected]

Definition at line 1109 of file OgreRenderSystem.h.

StringVector Ogre::RenderSystem::mEventNames [protected]

List of names of events this rendersystem may raise.

Definition at line 1103 of file OgreRenderSystem.h.

size_t Ogre::RenderSystem::mFaceCount [protected]

Definition at line 1082 of file OgreRenderSystem.h.

bool Ogre::RenderSystem::mFragmentProgramBound [protected]

Definition at line 1115 of file OgreRenderSystem.h.

HardwareOcclusionQueryList Ogre::RenderSystem::mHwOcclusionQueries [protected]

Definition at line 1112 of file OgreRenderSystem.h.

bool Ogre::RenderSystem::mInvertVertexWinding [protected]

Definition at line 1091 of file OgreRenderSystem.h.

ColourValue Ogre::RenderSystem::mManualBlendColours[OGRE_MAX_TEXTURE_LAYERS][2] [protected]

Saved manual colour blends.

Definition at line 1089 of file OgreRenderSystem.h.

RenderTargetPriorityMap Ogre::RenderSystem::mPrioritisedRenderTargets [protected]

The render targets, ordered by priority.

Definition at line 1058 of file OgreRenderSystem.h.

RenderTargetMap Ogre::RenderSystem::mRenderTargets [protected]

The render targets.

Definition at line 1056 of file OgreRenderSystem.h.

TextureManager* Ogre::RenderSystem::mTextureManager [protected]

Definition at line 1069 of file OgreRenderSystem.h.

size_t Ogre::RenderSystem::mVertexCount [protected]

Definition at line 1083 of file OgreRenderSystem.h.

bool Ogre::RenderSystem::mVertexProgramBound [protected]

Definition at line 1114 of file OgreRenderSystem.h.

bool Ogre::RenderSystem::mVSync [protected]

Definition at line 1079 of file OgreRenderSystem.h.

bool Ogre::RenderSystem::mWBuffer [protected]

Definition at line 1080 of file OgreRenderSystem.h.

Matrix4 Ogre::RenderSystem::mWorldMatrices[256] [protected]

Saved set of world matrices.

Definition at line 1086 of file OgreRenderSystem.h.

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

OgreRenderSystem.h

Ogre::RenderSystem Class Reference

Public Types

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

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Member Data Documentation