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vertexDescriptor.h
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1 //
2 // Copyright 2013 Pixar
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4 // Licensed under the Apache License, Version 2.0 (the "Apache License")
5 // with the following modification; you may not use this file except in
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24 
25 #ifndef OSD_CPU_VERTEX_DESCRIPTOR_H
26 #define OSD_CPU_VERTEX_DESCRIPTOR_H
27 
28 #include "../version.h"
29 #include <string.h>
30 
31 namespace OpenSubdiv {
32 namespace OPENSUBDIV_VERSION {
33 
34 namespace Osd {
35 
38 
41 
43  VertexBufferDescriptor(int o, int l, int s) : offset(o), length(l), stride(s) { }
44 
46  bool IsValid() const {
47  return ((length>0) and (offset<stride) and (length<=stride-offset));
48  }
49 
52  bool CanEval( VertexBufferDescriptor const & other ) const {
53  return (IsValid() and
54  other.IsValid() and
55  (length==other.length));
56  }
57 
59  void Reset() {
60  offset = length = stride = 0;
61  }
62 
64  bool operator == ( VertexBufferDescriptor const other ) const {
65  return (offset == other.offset and
66  length == other.length and
67  stride == other.stride);
68  }
69 
70  int offset; // offset to desired element data
71  int length; // number or length of the data
72  int stride; // stride to the next element
73 };
74 
75 } // end namespace Osd
76 
77 } // end namespace OPENSUBDIV_VERSION
78 using namespace OPENSUBDIV_VERSION;
79 
80 } // end namespace OpenSubdiv
81 
82 #endif /* OSD_CPU_VERTEX_DESCRIPTRO_H */
83 
bool operator==(VertexBufferDescriptor const other) const
True if the descriptors are identical.
bool IsValid() const
True if the descriptor values are internally consistent.
Describes vertex elements in interleaved data buffers.
void Reset()
Resets the descriptor to default.
bool CanEval(VertexBufferDescriptor const &other) const