OgreShadowCaster.h
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1 /*
2 -----------------------------------------------------------------------------
3 This source file is part of OGRE
4  (Object-oriented Graphics Rendering Engine)
5 For the latest info, see http://www.ogre3d.org/
6 
7 Copyright (c) 2000-2013 Torus Knot Software Ltd
8 
9 Permission is hereby granted, free of charge, to any person obtaining a copy
10 of this software and associated documentation files (the "Software"), to deal
11 in the Software without restriction, including without limitation the rights
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13 copies of the Software, and to permit persons to whom the Software is
14 furnished to do so, subject to the following conditions:
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17 all copies or substantial portions of the Software.
18 
19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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26 -----------------------------------------------------------------------------
27 */
28 #ifndef __ShadowCaster_H__
29 #define __ShadowCaster_H__
30 
31 #include "OgrePrerequisites.h"
32 #include "OgreRenderable.h"
33 #include "OgreHeaderPrefix.h"
34 
35 
36 namespace Ogre {
37 
53  {
54  protected:
58  public:
59  ShadowRenderable() : mMaterial(), mLightCap(0) {}
60  virtual ~ShadowRenderable() { delete mLightCap; }
64  void setMaterial(const MaterialPtr& mat) { mMaterial = mat; }
66  const MaterialPtr& getMaterial(void) const { return mMaterial; }
68  void getRenderOperation(RenderOperation& op) { op = mRenderOp; }
70  RenderOperation* getRenderOperationForUpdate(void) {return &mRenderOp;}
72  void getWorldTransforms(Matrix4* xform) const = 0;
74  Real getSquaredViewDepth(const Camera*) const{ return 0; /* not used */}
76  const LightList& getLights(void) const;
87  bool isLightCapSeparate(void) const { return mLightCap != 0; }
88 
90  ShadowRenderable* getLightCapRenderable(void) { return mLightCap; }
92  virtual bool isVisible(void) const { return true; }
93 
100  virtual void rebindIndexBuffer(const HardwareIndexBufferSharedPtr& indexBuffer) = 0;
101 
102  };
103 
106  {
108  SRF_INCLUDE_LIGHT_CAP = 0x00000001,
110  SRF_INCLUDE_DARK_CAP = 0x00000002,
113  };
114 
118  {
119  public:
120  virtual ~ShadowCaster() { }
122  virtual bool getCastShadows(void) const = 0;
123 
125  virtual EdgeData* getEdgeList(void) = 0;
127  virtual bool hasEdgeList(void) = 0;
128 
130  virtual const AxisAlignedBox& getWorldBoundingBox(bool derive = false) const = 0;
132  virtual const AxisAlignedBox& getLightCapBounds(void) const = 0;
134  virtual const AxisAlignedBox& getDarkCapBounds(const Light& light, Real dirLightExtrusionDist) const = 0;
135 
138 
160  virtual ShadowRenderableListIterator getShadowVolumeRenderableIterator(
161  ShadowTechnique shadowTechnique, const Light* light,
162  HardwareIndexBufferSharedPtr* indexBuffer, size_t* indexBufferUsedSize,
163  bool extrudeVertices, Real extrusionDistance, unsigned long flags = 0 ) = 0;
164 
188  static void extrudeVertices(const HardwareVertexBufferSharedPtr& vertexBuffer,
189  size_t originalVertexCount, const Vector4& lightPos, Real extrudeDist);
191  virtual Real getPointExtrusionDistance(const Light* l) const = 0;
192  protected:
194  Real getExtrusionDistance(const Vector3& objectPos, const Light* light) const;
203  virtual void updateEdgeListLightFacing(EdgeData* edgeData,
204  const Vector4& lightPos);
205 
228  virtual void generateShadowVolume(EdgeData* edgeData,
229  const HardwareIndexBufferSharedPtr& indexBuffer, size_t& indexBufferUsedSize,
230  const Light* light, ShadowRenderableList& shadowRenderables, unsigned long flags);
240  virtual void extrudeBounds(AxisAlignedBox& box, const Vector4& lightPos,
241  Real extrudeDist) const;
242 
243 
244  };
247 } // namespace Ogre
248 #include "OgreHeaderSuffix.h"
249 
250 #endif // __ShadowCaster_H__
Class which represents the renderable aspects of a set of shadow volume faces.
virtual bool isVisible(void) const
Should this ShadowRenderable be treated as visible?
Concrete IteratorWrapper for nonconst access to the underlying container.
Abstract class defining the interface all renderable objects must implement.
#define _OgreExport
Definition: OgrePlatform.h:257
const MaterialPtr & getMaterial(void) const
Retrieves a weak reference to the material this renderable object uses.
VectorIterator< ShadowRenderableList > ShadowRenderableListIterator
Shared pointer implementation used to share index buffers.
For shadow volume techniques only, indicates volume is extruded to infinity.
vector< ShadowRenderable * >::type ShadowRenderableList
4-dimensional homogeneous vector.
Definition: OgreVector4.h:45
void getRenderOperation(RenderOperation &op)
Gets the render operation required to send this object to the frame buffer.
float Real
Software floating point type.
void setMaterial(const MaterialPtr &mat)
Set the material to be used by the shadow, should be set by the caller before adding to a render queu...
ShadowTechnique
An enumeration of broad shadow techniques.
Definition: OgreCommon.h:190
This class contains the information required to describe the edge connectivity of a given set of vert...
ShadowRenderableFlags
A set of flags that can be used to influence ShadowRenderable creation.
Class encapsulating a standard 4x4 homogeneous matrix.
Definition: OgreMatrix4.h:78
Standard 3-dimensional vector.
Definition: OgreVector3.h:51
Shared pointer implementation used to share vertex buffers.
ShadowRenderable * getLightCapRenderable(void)
Get the light cap version of this renderable.
A hashed vector.
Definition: OgreCommon.h:332
This class defines the interface that must be implemented by shadow casters.
RenderOperation * getRenderOperationForUpdate(void)
Get the internal render operation for set up.
For shadow volume techniques only, generate a light cap on the volume.
bool isLightCapSeparate(void) const
Does this renderable require a separate light cap?
ShadowRenderable * mLightCap
A viewpoint from which the scene will be rendered.
Definition: OgreCamera.h:86
For shadow volume techniques only, generate a dark cap on the volume.
This source file is part of OGRE (Object-oriented Graphics Rendering Engine) For the latest info...
Real getSquaredViewDepth(const Camera *) const
Returns the camera-relative squared depth of this renderable.
RenderOperation mRenderOp
&#39;New&#39; rendering operation using vertex buffers.
ShadowRenderable()
Used only if isLightCapSeparate == true.
A 3D box aligned with the x/y/z axes.
Representation of a dynamic light source in the scene.
Definition: OgreLight.h:73
Superclass for all objects that wish to use custom memory allocators when their new / delete operator...

Copyright © 2012 Torus Knot Software Ltd
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Last modified Sun Oct 22 2017 04:04:15