| Ptex
    | 
Point-sampling filter for triangular textures. More...
 
  
| Public Member Functions | |
| PtexPointFilterTri (PtexTexture *tx) | |
| virtual void | release () | 
| Release resources held by this pointer (pointer becomes invalid).  More... | |
| 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.  More... | |
| 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.  More... | |
Point-sampling filter for triangular textures.
Definition at line 70 of file PtexFilters.cpp.
| 
 | inline | 
Definition at line 73 of file PtexFilters.cpp.
| 
 | 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.
| 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 75 of file PtexFilters.cpp.
References _tx, PtexUtils::clamp(), PtexTexture::getFaceInfo(), PtexTexture::getPixel(), PtexTexture::numFaces(), Ptex::FaceInfo::res, and Ptex::Res::u().
| 
 | inlinevirtual | 
Release resources held by this pointer (pointer becomes invalid).
Implements PtexFilter.
Definition at line 74 of file PtexFilters.cpp.
| 
 | private | 
Definition at line 101 of file PtexFilters.cpp.
Referenced by eval().
 1.8.17
 1.8.17