Urho3D::OcclusionBuffer Class Reference

Software renderer for occlusion. More...

#include <Urho3D/Graphics/OcclusionBuffer.h>

Inheritance diagram for Urho3D::OcclusionBuffer:

Public Member Functions
	OcclusionBuffer (Context *context)
	Construct.
	~OcclusionBuffer () override
	Destruct.
bool	SetSize (int width, int height, bool threaded)
	Set occlusion buffer size and whether to reserve multiple buffers for threading optimization.
void	SetView (Camera *camera)
	Set camera view to render from.
void	SetMaxTriangles (unsigned triangles)
	Set maximum triangles to render.
void	SetCullMode (CullMode mode)
	Set culling mode.
void	Reset ()
	Reset number of triangles.
void	Clear ()
	Clear the buffer.
bool	AddTriangles (const Matrix3x4 &model, const void *vertexData, unsigned vertexSize, unsigned vertexStart, unsigned vertexCount)
	Submit a triangle mesh to the buffer using non-indexed geometry. Return true if did not overflow the allowed triangle count.
bool	AddTriangles (const Matrix3x4 &model, const void *vertexData, unsigned vertexSize, const void *indexData, unsigned indexSize, unsigned indexStart, unsigned indexCount)
	Submit a triangle mesh to the buffer using indexed geometry. Return true if did not overflow the allowed triangle count.
void	DrawTriangles ()
	Draw submitted batches. Uses worker threads if enabled during SetSize().
void	BuildDepthHierarchy ()
	Build reduced size mip levels.
void	ResetUseTimer ()
	Reset last used timer.
int *	GetBuffer () const
	Return highest level depth values.
const Matrix3x4 &	GetView () const
	Return view transform matrix.
const Matrix4 &	GetProjection () const
	Return projection matrix.
int	GetWidth () const
	Return buffer width.
int	GetHeight () const
	Return buffer height.
unsigned	GetNumTriangles () const
	Return number of rendered triangles.
unsigned	GetMaxTriangles () const
	Return maximum number of triangles.
CullMode	GetCullMode () const
	Return culling mode.
bool	IsThreaded () const
	Return whether is using threads to speed up rendering.
bool	IsVisible (const BoundingBox &worldSpaceBox) const
	Test a bounding box for visibility. For best performance, build depth hierarchy first.
unsigned	GetUseTimer ()
	Return time since last use in milliseconds.
void	DrawBatch (const OcclusionBatch &batch, unsigned threadIndex)
	Draw a batch. Called internally.
Public Member Functions inherited from Urho3D::Object
	Object (Context *context)
	Construct.
	~Object () override
	Destruct. Clean up self from event sender & receiver structures.
virtual StringHash	GetType () const =0
virtual const ea::string &	GetTypeName () const =0
virtual const TypeInfo *	GetTypeInfo () const =0
	Return type info.
virtual bool	IsInstanceOf (StringHash type) const =0
	Check whether current instance implements specified type.
virtual void	OnEvent (Object *sender, StringHash eventType, VariantMap &eventData)
	Handle event.
virtual void	SerializeInBlock (Archive &archive)
	Serialize content from/to archive. May throw ArchiveException.
template<typename T >
bool	IsInstanceOf () const
	Check current instance is type of specified class.
template<typename T >
T *	Cast ()
	Cast the object to specified most derived class.
template<typename T >
const T *	Cast () const
	Cast the object to specified most derived class.
void	SubscribeToEventManual (StringHash eventType, EventHandler *handler)
	Subscribe to an event that can be sent by any sender.
void	SubscribeToEventManual (Object *sender, StringHash eventType, EventHandler *handler)
	Subscribe to a specific sender's event.
template<class T >
void	SubscribeToEvent (StringHash eventType, T handler)
	Subscribe to an event that can be sent by any sender.
template<class T >
void	SubscribeToEvent (Object *sender, StringHash eventType, T handler)
	Subscribe to a specific sender's event.
void	UnsubscribeFromEvent (StringHash eventType)
	Unsubscribe from an event.
void	UnsubscribeFromEvent (Object *sender, StringHash eventType)
	Unsubscribe from a specific sender's event.
void	UnsubscribeFromEvents (Object *sender)
	Unsubscribe from a specific sender's events.
void	UnsubscribeFromAllEvents ()
	Unsubscribe from all events.
void	UnsubscribeFromAllEventsExcept (const ea::vector< StringHash > &exceptions)
	Unsubscribe from all events except those listed.
void	UnsubscribeFromAllEventsExcept (const ea::vector< Object * > &exceptions)
	Unsubscribe from all events except those with listed senders.
void	SendEvent (StringHash eventType)
	Send event to all subscribers.
void	SendEvent (StringHash eventType, VariantMap &eventData)
	Send event with parameters to all subscribers.
VariantMap &	GetEventDataMap () const
	Return a preallocated map for event data. Used for optimization to avoid constant re-allocation of event data maps.
template<typename... Args>
void	SendEvent (StringHash eventType, const Args &... args)
	Send event with variadic parameter pairs to all subscribers. The parameters are (paramID, paramValue) pairs.
Context *	GetContext () const
	Return execution context.
const Variant &	GetGlobalVar (StringHash key) const
const VariantMap &	GetGlobalVars () const
void	SetGlobalVar (StringHash key, const Variant &value)
Object *	GetSubsystem (StringHash type) const
	Return subsystem by type.
Object *	GetEventSender () const
	Return active event sender. Null outside event handling.
EventHandler *	GetEventHandler () const
	Return active event handler. Null outside event handling.
bool	HasSubscribedToEvent (StringHash eventType) const
	Return whether has subscribed to an event without specific sender.
bool	HasSubscribedToEvent (Object *sender, StringHash eventType) const
	Return whether has subscribed to a specific sender's event.
bool	HasEventHandlers () const
	Return whether has subscribed to any event.
template<class T >
T *	GetSubsystem () const
	Template version of returning a subsystem.
const ea::string &	GetCategory () const
void	SendEvent (StringHash eventType, const VariantMap &eventData)
	Send event with parameters to all subscribers.
void	SetBlockEvents (bool block)
	Block object from sending and receiving events.
bool	GetBlockEvents () const
	Return sending and receiving events blocking status.
Public Member Functions inherited from Urho3D::RefCounted
	RefCounted ()
	Construct. Allocate the reference count structure and set an initial self weak reference.
virtual	~RefCounted ()
	Destruct. Mark as expired and also delete the reference count structure if no outside weak references exist.
	RefCounted (const RefCounted &rhs)=delete
	Prevent copy construction.
RefCounted &	operator= (const RefCounted &rhs)=delete
	Prevent assignment.
int	AddRef ()
int	ReleaseRef ()
int	Refs () const
int	WeakRefs () const
RefCount *	RefCountPtr () const
	Return pointer to the reference count structure.
bool	HasScriptObject () const
	Return true if script runtime object wrapping this native object exists.
bool	IsScriptStrongRef () const
	Return true if script reference is strong.

Static Public Member Functions
static void	RegisterObject (Context *context)
	Register object with the engine.
Static Public Member Functions inherited from Urho3D::Object
static const TypeInfo *	GetTypeInfoStatic ()
	Return type info static.

Private Member Functions
	URHO3D_OBJECT (OcclusionBuffer, Object)
Vector4	ModelTransform (const Matrix4 &transform, const Vector3 &vertex) const
	Apply modelview transform to vertex.
Vector3	ViewportTransform (const Vector4 &vertex) const
	Apply projection and viewport transform to vertex.
Vector4	ClipEdge (const Vector4 &v0, const Vector4 &v1, float d0, float d1) const
	Clip an edge.
float	SignedArea (const Vector3 &v0, const Vector3 &v1, const Vector3 &v2) const
	Return signed area of a triangle. If negative, is clockwise.
void	CalculateViewport ()
	Calculate viewport transform.
void	DrawTriangle (Vector4 *vertices, unsigned threadIndex)
	Draw a triangle.
void	ClipVertices (const Vector4 &plane, Vector4 *vertices, bool *triangles, unsigned &numTriangles)
	Clip vertices against a plane.
void	DrawTriangle2D (const Vector3 *vertices, bool clockwise, unsigned threadIndex)
	Draw a clipped triangle.
void	ClearBuffer (unsigned threadIndex)
	Clear a thread work buffer.
void	MergeBuffers ()
	Merge thread work buffers into the first buffer.

Private Attributes
ea::vector< OcclusionBufferData >	buffers_
	Highest-level buffer data per thread.
ea::vector< ea::shared_array< DepthValue > >	mipBuffers_
	Reduced size depth buffers.
ea::vector< OcclusionBatch >	batches_
	Submitted render jobs.
int	width_ {}
	Buffer width.
int	height_ {}
	Buffer height.
unsigned	numTriangles_ {}
	Number of rendered triangles.
unsigned	maxTriangles_ {OCCLUSION_DEFAULT_MAX_TRIANGLES}
	Maximum number of triangles.
CullMode	cullMode_ {CULL_CCW}
	Culling mode.
bool	depthHierarchyDirty_ {true}
	Depth hierarchy needs update flag.
bool	reverseCulling_ {}
	Culling reverse flag.
Matrix3x4	view_
	View transform matrix.
Matrix4	projection_
	Projection matrix.
Matrix4	viewProj_
	Combined view and projection matrix.
Timer	useTimer_
	Last used timer.
float	nearClip_ {}
	Near clip distance.
float	farClip_ {}
	Far clip distance.
float	scaleX_ {}
	X scaling for viewport transform.
float	scaleY_ {}
	Y scaling for viewport transform.
float	offsetX_ {}
	X offset for viewport transform.
float	offsetY_ {}
	Y offset for viewport transform.
float	projOffsetScaleX_ {}
	Combined X projection and viewport transform.
float	projOffsetScaleY_ {}
	Combined Y projection and viewport transform.

Additional Inherited Members
Static Public Attributes inherited from Urho3D::Object
static constexpr ea::array< StringHash, 0 >	TypeHierarchy {}
Protected Attributes inherited from Urho3D::Object
WeakPtr< Context >	context_
	Execution context.

Detailed Description

Software renderer for occlusion.

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

• Urho3D/Graphics/OcclusionBuffer.h
• Urho3D/Graphics/OcclusionBuffer.cpp