HDK
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
GEO_PrimTriFan.h
Go to the documentation of this file.
1 /*
2  * PROPRIETARY INFORMATION. This software is proprietary to
3  * Side Effects Software Inc., and is not to be reproduced,
4  * transmitted, or disclosed in any way without written permission.
5  *
6  * NAME: GEO_PrimTriFan.h ( GEO Library, C++)
7  *
8  * COMMENTS: Implements a normal triangle fan.
9  */
10 
11 #ifndef __GEO_PrimTriFan__
12 #define __GEO_PrimTriFan__
13 
14 #include "GEO_API.h"
15 #include "GEO_TriMesh.h"
16 #include "GEO_PrimType.h"
17 
18 class GA_Detail;
19 
20 /// Triangle fan. All triangles share the first vertex
22 {
23 protected:
24  /// NOTE: The constructor should only be called from subclass
25  /// constructors.
27  : GEO_TriMesh(d, offset)
28  {}
29 
30  /// NOTE: The destructor should only be called from subclass
31  /// destructors.
32  ~GEO_PrimTriFan() override {}
33 
34 public:
35  /// @{
36  /// Interface from GEO_TriMesh
37  bool isDegenerate() const override;
38  UT_Vector3 computeNormal() const override;
39  void reverse() override;
40 
41  fpreal calcVolume(const UT_Vector3 &refpt) const override;
42  fpreal calcArea() const override;
43  fpreal calcPerimeter() const override;
44  /// @}
45 
46  /// Get number of triangles in the fan
47  exint getTriangleCount() const { return getVertexCount()-2; }
48 
49  /// Get the vertices for a single triangle in the fan
50  void getTriangleVertices(exint tri, int &v0, int &v1, int &v2) const
51  {
52  v0 = 0;
53  v1 = tri + 1;
54  v2 = tri + 2;
55  }
56 
57  const GA_PrimitiveJSON *getJSON() const override;
58 
59 protected:
61  { return GEO_TriMesh::buildFamilyMask(); }
62 
63  /// All subclasses should call this method to register the curve intrinsics.
64  /// @see GA_IntrinsicManager
67  { return GEO_TriMesh::registerIntrinsics(defn); }
68 
69  // We don't need to save anything other than what's in a face
70  bool savePrivateH9(std::ostream &,
71  bool binary) const override;
72  bool loadPrivateH9(UT_IStream &) override;
73 
74 private:
75  friend std::ostream &operator<<(std::ostream &os, const GEO_PrimTriFan &d)
76  {
77  d.saveH9(os, 0,
80  return os;
81  }
82 };
83 
84 #endif
85 
static GA_IntrinsicManager::Registrar registerIntrinsics(GA_PrimitiveDefinition &defn)
Definition: GEO_TriMesh.h:192
fpreal calcPerimeter() const override
bool isDegenerate() const override
Is the primitive degenerate.
SYS_FORCE_INLINE GA_Size getVertexCount() const
Return the number of vertices used by this primitive.
Definition: GA_Primitive.h:232
fpreal calcVolume(const UT_Vector3 &) const override
int64 exint
Definition: SYS_Types.h:125
void reverse() override=0
Reverse the order of vertices.
fpreal calcArea() const override
GA_PrimitiveFamilyMask
virtual UT_Vector3 computeNormal() const =0
Return a normal vector for the primitive.
virtual bool loadPrivateH9(UT_IStream &is)=0
#define GA_INVALID_OFFSET
Definition: GA_Types.h:676
GA_Size GA_Offset
Definition: GA_Types.h:639
GLfloat GLfloat GLfloat v2
Definition: glew.h:1856
Triangle fan. All triangles share the first vertex.
const GLuint GLenum const void * binary
Definition: glew.h:3502
virtual bool savePrivateH9(std::ostream &os, bool binary) const =0
bool saveH9(std::ostream &os, bool binary, const UT_Array< GA_AttribSaveDataH9 > &prim_attribs, const UT_Array< GA_AttribSaveDataH9 > &vtx_attribs) const override
~GEO_PrimTriFan() override
static GA_IntrinsicManager::Registrar registerIntrinsics(GA_PrimitiveDefinition &defn)
virtual const GA_PrimitiveJSON * getJSON() const =0
Provide a JSON interface to a primitive.
#define GEO_API
Definition: GEO_API.h:14
static GA_PrimitiveFamilyMask buildFamilyMask()
friend std::ostream & operator<<(std::ostream &os, const GEO_PrimTriFan &d)
exint getTriangleCount() const
Get number of triangles in the fan.
GEO_PrimTriFan(GA_Detail *d, GA_Offset offset=GA_INVALID_OFFSET)
static const UT_Array< GA_AttribSaveDataH9 > & theEmptySaveAttribs
Convience objects to pass as arguments to saveH9()/loadH9().
fpreal64 fpreal
Definition: SYS_Types.h:277
GLfloat v0
Definition: glew.h:1848
Container class for all geometry.
Definition: GA_Detail.h:95
Definition of a geometric primitive.
GLfloat GLfloat v1
Definition: glew.h:1852
static GA_PrimitiveFamilyMask buildFamilyMask()
Definition: GEO_TriMesh.h:187
void getTriangleVertices(exint tri, int &v0, int &v1, int &v2) const
Get the vertices for a single triangle in the fan.
GLintptr offset
Definition: glew.h:1682