1 // Created on: 2011-11-02
2 // Created by: Sergey ZERCHANINOV
3 // Copyright (c) 2011-2015 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 #ifndef _OpenGl_Layer_Header
17 #define _OpenGl_Layer_Header
19 #include <NCollection_Sequence.hxx>
20 #include <NCollection_Array1.hxx>
22 #include <OpenGl_BVHClipPrimitiveSet.hxx>
23 #include <OpenGl_BVHClipPrimitiveTrsfPersSet.hxx>
24 #include <OpenGl_BVHTreeSelector.hxx>
26 #include <Graphic3d_ZLayerSettings.hxx>
27 #include <Graphic3d_Camera.hxx>
28 #include <OpenGl_GlCore11.hxx>
31 struct OpenGl_GlobalLayerSettings
37 //! Defines index map of OpenGL structures.
38 typedef NCollection_IndexedMap<const OpenGl_Structure*> OpenGl_IndexedMapOfStructure;
40 //! Defines array of indexed maps of OpenGL structures.
41 typedef NCollection_Array1<OpenGl_IndexedMapOfStructure> OpenGl_ArrayOfIndexedMapOfStructure;
43 //! Presentations list sorted within priorities.
44 class OpenGl_Layer : public Standard_Transient
46 DEFINE_STANDARD_RTTIEXT(OpenGl_Layer, Standard_Transient)
49 //! Initializes associated priority list and layer properties
50 OpenGl_Layer (const Standard_Integer theNbPriorities,
51 const Handle(Select3D_BVHBuilder3d)& theBuilder);
54 virtual ~OpenGl_Layer();
56 //! Returns BVH tree builder for frustom culling.
57 const Handle(Select3D_BVHBuilder3d)& FrustumCullingBVHBuilder() const { return myBVHPrimitivesTrsfPers.Builder(); }
59 //! Assigns BVH tree builder for frustom culling.
60 void SetFrustumCullingBVHBuilder (const Handle(Select3D_BVHBuilder3d)& theBuilder) { myBVHPrimitivesTrsfPers.SetBuilder (theBuilder); }
62 //! Return true if layer was marked with immediate flag.
63 Standard_Boolean IsImmediate() const { return myLayerSettings.IsImmediate(); }
65 //! Returns settings of the layer object.
66 const Graphic3d_ZLayerSettings& LayerSettings() const { return myLayerSettings; };
68 //! Sets settings of the layer object.
69 void SetLayerSettings (const Graphic3d_ZLayerSettings& theSettings);
71 void Add (const OpenGl_Structure* theStruct,
72 const Standard_Integer thePriority,
73 Standard_Boolean isForChangePriority = Standard_False);
75 //! Remove structure and returns its priority, if the structure is not found, method returns negative value
76 bool Remove (const OpenGl_Structure* theStruct,
77 Standard_Integer& thePriority,
78 Standard_Boolean isForChangePriority = Standard_False);
80 //! @return the number of structures
81 Standard_Integer NbStructures() const { return myNbStructures; }
83 //! Returns the number of available priority levels
84 Standard_Integer NbPriorities() const { return myArray.Length(); }
86 //! Append layer of acceptable type (with similar number of priorities or less).
87 //! Returns Standard_False if the list can not be accepted.
88 Standard_Boolean Append (const OpenGl_Layer& theOther);
90 //! Returns array of OpenGL structures.
91 const OpenGl_ArrayOfIndexedMapOfStructure& ArrayOfStructures() const { return myArray; }
93 //! Marks BVH tree for given priority list as dirty and
94 //! marks primitive set for rebuild.
95 void InvalidateBVHData() const;
97 //! Marks cached bounding box as obsolete.
98 void InvalidateBoundingBox() const
100 myIsBoundingBoxNeedsReset[0] = myIsBoundingBoxNeedsReset[1] = true;
103 //! Returns layer bounding box.
104 //! @param theViewId view index to consider View Affinity in structure
105 //! @param theCamera camera definition
106 //! @param theWindowWidth viewport width (for applying transformation-persistence)
107 //! @param theWindowHeight viewport height (for applying transformation-persistence)
108 //! @param theToIncludeAuxiliary consider also auxiliary presentations (with infinite flag or with trihedron transformation persistence)
109 //! @return computed bounding box
110 Bnd_Box BoundingBox (const Standard_Integer theViewId,
111 const Handle(Graphic3d_Camera)& theCamera,
112 const Standard_Integer theWindowWidth,
113 const Standard_Integer theWindowHeight,
114 const Standard_Boolean theToIncludeAuxiliary) const;
116 //! Returns zoom-scale factor.
117 Standard_Real considerZoomPersistenceObjects (const Standard_Integer theViewId,
118 const Handle(Graphic3d_Camera)& theCamera,
119 const Standard_Integer theWindowWidth,
120 const Standard_Integer theWindowHeight) const;
122 // Render all structures.
123 void Render (const Handle(OpenGl_Workspace)& theWorkspace,
124 const OpenGl_GlobalLayerSettings& theDefaultSettings) const;
126 //! Returns number of transform persistence objects.
127 Standard_Integer NbOfTransformPersistenceObjects() const
129 return myBVHPrimitivesTrsfPers.Size();
134 //! Updates BVH trees if their state has been invalidated.
135 void updateBVH() const;
137 //! Traverses through BVH tree to determine which structures are in view volume.
138 void traverse (const OpenGl_BVHTreeSelector& theSelector) const;
140 //! Iterates through the hierarchical list of existing structures and renders them all.
141 void renderAll (const Handle(OpenGl_Workspace)& theWorkspace) const;
143 //! Iterates through the hierarchical list of existing structures and renders only overlapping ones.
144 void renderTraverse (const Handle(OpenGl_Workspace)& theWorkspace) const;
148 //! Array of OpenGl_Structures by priority rendered in layer.
149 OpenGl_ArrayOfIndexedMapOfStructure myArray;
151 //! Overall number of structures rendered in the layer.
152 Standard_Integer myNbStructures;
154 //! Layer setting flags.
155 Graphic3d_ZLayerSettings myLayerSettings;
157 //! Set of OpenGl_Structures structures for building BVH tree.
158 mutable OpenGl_BVHClipPrimitiveSet myBVHPrimitives;
160 //! Set of transform persistent OpenGl_Structures for building BVH tree.
161 mutable OpenGl_BVHClipPrimitiveTrsfPersSet myBVHPrimitivesTrsfPers;
163 //! Indexed map of always rendered structures.
164 mutable NCollection_IndexedMap<const OpenGl_Structure*> myAlwaysRenderedMap;
166 //! Is needed for implementation of stochastic order of BVH traverse.
167 mutable Standard_Boolean myBVHIsLeftChildQueuedFirst;
169 //! Defines if the primitive set for BVH is outdated.
170 mutable Standard_Boolean myIsBVHPrimitivesNeedsReset;
172 //! Defines if the cached bounding box is outdated.
173 mutable bool myIsBoundingBoxNeedsReset[2];
175 //! Cached layer bounding box.
176 mutable Bnd_Box myBoundingBox[2];
180 DEFINE_STANDARD_ALLOC
184 #endif //_OpenGl_Layer_Header