Point-sampling filter for rectangular textures. More...

Inheritance diagram for PtexPointFilter:

Public Member Functions
	PtexPointFilter (PtexTexture *tx)

virtual void	release ()
	Release resources held by this pointer (pointer becomes invalid).

virtual void	eval (float *result, int firstchan, int nchannels, int faceid, float u, float v, float, float, float, float, float, float)
	Apply filter to a ptex data file.

virtual void	release ()=0
	Release resources held by this pointer (pointer becomes invalid).

virtual void	eval (float *result, int firstchan, int nchannels, int faceid, float u, float v, float uw1, float vw1, float uw2, float vw2, float width=1, float blur=0)=0
	Apply filter to a ptex data file.

Private Attributes
PtexTexture *	_tx

Additional Inherited Members
Public Types inherited from PtexFilter
enum	FilterType { f_point , f_bilinear , f_box , f_gaussian , f_bicubic , f_bspline , f_catmullrom , f_mitchell }
	Filter types. More...

Static Public Member Functions inherited from PtexFilter
static PtexFilter *	getFilter (PtexTexture *tx, const Options &opts)

Protected Member Functions inherited from PtexFilter
virtual	~PtexFilter ()
	Destructor not for public use. Use release() instead.

Detailed Description

Point-sampling filter for rectangular textures.

Definition at line 45 of file PtexFilters.cpp.

Constructor & Destructor Documentation

◆ PtexPointFilter()

PtexPointFilter::PtexPointFilter ( PtexTexture * tx )

inline

Definition at line 48 of file PtexFilters.cpp.

Member Function Documentation

◆ eval()

virtual void PtexPointFilter::eval	(	float *	result,
		int	firstchan,
		int	nchannels,
		int	faceid,
		float	u,
		float	v,
		float	uw1,
		float	vw1,
		float	uw2,
		float	vw2,
		float	width,
		float	blur
	)

inlinevirtual

Apply filter to a ptex data file.

The filter region is a parallelogram centered at the given (u,v) coordinate with sides defined by two vectors [uw1, vw1] and [uw2, vw2]. For an axis-aligned rectangle, the vectors are [uw, 0] and [0, vw]. See Filter Footprint for details.

Parameters

result	Buffer to hold filter result. Must be large enough to hold nchannels worth of data.
firstchan	First channel to evaluate [0..tx->numChannels()-1]
nchannels	Number of channels to evaluate
faceid	Face index [0..tx->numFaces()-1]
u	U coordinate, normalized [0..1]
v	V coordinate, normalized [0..1]
uw1	U filter width 1, normalized [0..1]
vw1	V filter width 1, normalized [0..1]
uw2	U filter width 2, normalized [0..1]
vw2	V filter width 2, normalized [0..1]
width	scale factor for filter width
blur	amount to add to filter width [0..1]

Implements PtexFilter.

Definition at line 50 of file PtexFilters.cpp.

References _tx, PtexUtils::clamp(), PtexTexture::getFaceInfo(), PtexTexture::getPixel(), PtexTexture::numFaces(), Ptex::FaceInfo::res, and Ptex::Res::u().

◆ release()

virtual void PtexPointFilter::release ( )

inlinevirtual

Release resources held by this pointer (pointer becomes invalid).

Implements PtexFilter.

Definition at line 49 of file PtexFilters.cpp.

Member Data Documentation

◆ _tx

PtexTexture* PtexPointFilter::_tx

private

Definition at line 65 of file PtexFilters.cpp.

Referenced by eval().

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

PtexFilters.cpp

Public Member Functions

Private Attributes

Additional Inherited Members