1 // Copyright (c) 2020 OPEN CASCADE SAS
3 // This file is part of Open CASCADE Technology software library.
5 // This library is free software; you can redistribute it and/or modify it under
6 // the terms of the GNU Lesser General Public License version 2.1 as published
7 // by the Free Software Foundation, with special exception defined in the file
8 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
9 // distribution for complete text of the license and disclaimer of any warranty.
11 // Alternatively, this file may be used under the terms of Open CASCADE
12 // commercial license or contractual agreement.
14 #ifndef _OpenGl_TextureSetPairIterator_Header
15 #define _OpenGl_TextureSetPairIterator_Header
17 #include <OpenGl_TextureSet.hxx>
19 //! Class for iterating pair of texture sets through each defined texture slot.
20 //! Note that iterator considers texture slots being in ascending order within OpenGl_TextureSet.
21 class OpenGl_TextureSetPairIterator
26 OpenGl_TextureSetPairIterator (const Handle(OpenGl_TextureSet)& theSet1,
27 const Handle(OpenGl_TextureSet)& theSet2)
32 myUnitLower (IntegerLast()),
33 myUnitUpper (IntegerFirst()),
37 && !theSet1->IsEmpty())
39 myUnitLower = Min (myUnitLower, theSet1->FirstUnit());
40 myUnitUpper = Max (myUnitUpper, theSet1->LastUnit());
43 && !theSet2->IsEmpty())
45 myUnitLower = Min (myUnitLower, theSet2->FirstUnit());
46 myUnitUpper = Max (myUnitUpper, theSet2->LastUnit());
48 myUnitCurrent = myUnitLower;
49 myTexture1 = (myIter1.More() && myIter1.Unit() == myUnitCurrent)
50 ? myIter1.ChangeValue().get()
52 myTexture2 = (myIter2.More() && myIter2.Unit() == myUnitCurrent)
53 ? myIter2.ChangeValue().get()
57 //! Return TRUE if there are more texture units to pass through.
58 bool More() const { return myUnitCurrent <= myUnitUpper; }
60 //! Return current texture unit.
61 Graphic3d_TextureUnit Unit() const { return (Graphic3d_TextureUnit )myUnitCurrent; }
63 //! Access texture from first texture set.
64 const OpenGl_Texture* Texture1() const { return myTexture1; }
66 //! Access texture from second texture set.
67 const OpenGl_Texture* Texture2() const { return myTexture2; }
69 //! Move iterator position to the next pair.
73 myTexture1 = myTexture2 = NULL;
74 for (; myIter1.More(); myIter1.Next())
76 if (myIter1.Unit() >= myUnitCurrent)
78 myTexture1 = myIter1.Unit() == myUnitCurrent ? myIter1.ChangeValue().get() : NULL;
82 for (; myIter2.More(); myIter2.Next())
84 if (myIter2.Unit() >= myUnitCurrent)
86 myTexture2 = myIter2.Unit() == myUnitCurrent ? myIter2.ChangeValue().get() : NULL;
94 OpenGl_TextureSet::Iterator myIter1;
95 OpenGl_TextureSet::Iterator myIter2;
96 OpenGl_Texture* myTexture1;
97 OpenGl_Texture* myTexture2;
98 Standard_Integer myUnitLower;
99 Standard_Integer myUnitUpper;
100 Standard_Integer myUnitCurrent;
104 #endif //_OpenGl_TextureSetPairIterator_Header