Ptex
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Information about a face, as stored in the Ptex file header. More...
#include <Ptexture.h>
Public Types | |
enum | { flag_constant = 1, flag_hasedits = 2, flag_nbconstant = 4, flag_subface = 8 } |
Flag bit values (for internal use). | |
Public Member Functions | |
FaceInfo () | |
Default constructor, sets all members to zero. | |
FaceInfo (Res res_) | |
Constructor. | |
FaceInfo (Res res_, int adjfaces_[4], int adjedges_[4], bool isSubface_=false) | |
Constructor. | |
EdgeId | adjedge (int eid) const |
Access an adjacent edge id. The eid value must be 0..3. | |
int | adjface (int eid) const |
Access an adjacent face id. The eid value must be 0..3. | |
bool | isConstant () const |
Determine if face is constant (by checking a flag). | |
bool | isNeighborhoodConstant () const |
Determine if neighborhood of face is constant (by checking a flag). | |
bool | hasEdits () const |
Determine if face has edits in the file (by checking a flag). | |
bool | isSubface () const |
Determine if face is a subface (by checking a flag). | |
void | setadjfaces (int f0, int f1, int f2, int f3) |
Set the adjfaces data. | |
void | setadjedges (int e0, int e1, int e2, int e3) |
Set the adjedges data. | |
Public Attributes | |
Res | res |
Resolution of face. | |
uint8_t | adjedges |
Adjacent edges, 2 bits per edge. | |
uint8_t | flags |
Flags. | |
int32_t | adjfaces [4] |
Adjacent faces (-1 == no adjacent face). | |
Information about a face, as stored in the Ptex file header.
The FaceInfo data contains the face resolution and neighboring face adjacency information as well as a set of flags describing the face.
The adjfaces data member contains the face ids of the four neighboring faces. The neighbors are accessed in EdgeId order, CCW, starting with the bottom edge. The adjedges data member contains the corresponding edge id for each neighboring face.
If a face has no neighbor for a given edge, the adjface id should be -1, and the adjedge id doesn't matter (but is typically zero).
If an adjacent face is a pair of subfaces, the id of the first subface as encountered in a CCW traversal should be stored as the adjface id.