makVrv::DtInstance Class Reference

Notion of a 'GPU' instance An instance has a model id, instance id and an absolute transform (32 bits). More...

Public Member Functions
	DtInstance ()
	CTOR.
	DtInstance (int modelId, int instanceId, const Matrix4_32 &xform)
	CTOR.
int	id () const
	Get the id.
void	setId (int instanceId)
	Set the id.
int	modelId () const
	Get the model Id.
int	visible (void) const
	Visibility.
void	setVisible (int vis)
	Visibility.
int	data (void) const
	Internal custom data.
void	setData (int i)
	Internal custom data.
void	setXForm (const Matrix4_32 &xform)
	Set/Update the transform.

Protected Attributes
Vector4_int	myIds
Matrix4_32	myXForm

Detailed Description

Notion of a 'GPU' instance An instance has a model id, instance id and an absolute transform (32 bits).

An instance id can be set (using setId) and can be subsequently internally read/modified/used on the GPU (e.g. culling in compute shader). Transform may or may not be static. A DtInstance can be directly stored on the GPU (since its xform is 32 bit and its member layout is 4 byte-aligned such that its the exact same declaration in the shader. This is useful for things like indirect geometry. The layout of this class matches the equivalent structure in the indirect rendering shaders. Therefore, ***be CAREFUL if you extend/add variables to this class***, because you must change the corresponding structure in the shaders as well. Especially, be careful if you declare virtual methods/inherit this class (***best avoided***), because that will implicitly add 4/8 bytes for the vtable pointer that you need to account for in the shaders (not to mention, wasted GPU memory space)

Constructor & Destructor Documentation

makVrv::DtInstance::DtInstance

(

)

CTOR.

makVrv::DtInstance::DtInstance	(	int	modelId,
		int	instanceId,
		const Matrix4_32 &	xform
	)

CTOR.

Member Function Documentation

int makVrv::DtInstance::id

(

)

const

Get the id.

void makVrv::DtInstance::setId

(

int

instanceId

)

Set the id.

int makVrv::DtInstance::modelId

(

)

const

Get the model Id.

int makVrv::DtInstance::visible

(

void

)

const

Visibility.

void makVrv::DtInstance::setVisible

(

int

vis

)

Visibility.

int makVrv::DtInstance::data

(

void

)

const

Internal custom data.

void makVrv::DtInstance::setData

(

int

i

)

Internal custom data.

void makVrv::DtInstance::setXForm

(

const Matrix4_32 &

xform

)

Set/Update the transform.

Member Data Documentation

Vector4_int makVrv::DtInstance::myIds

protected

Matrix4_32 makVrv::DtInstance::myXForm

protected

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

• /exports/nfedora7-1/nightly/docs/vrforcesDevelopment.vrf4-6-branch/include/vrvIndirectRendering/DtInstance.h