Visualization Library 2.0.0-b3

A lightweight C++ OpenGL middleware for 2D/3D graphics

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DistanceLODEvaluator.hpp
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31 
32 #ifndef DistanceLODEvaluator_INCLUDE_ONCE
33 #define DistanceLODEvaluator_INCLUDE_ONCE
34 
35 #include <vlGraphics/Actor.hpp>
36 
37 namespace vl
38 {
39  //-----------------------------------------------------------------------------
40  // DistanceLODEvaluator
41  //-----------------------------------------------------------------------------
51  {
53 
54  public:
56  {
57  VL_DEBUG_SET_OBJECT_NAME()
58  }
59  virtual int evaluate(Actor* actor, Camera* camera)
60  {
61  if (mDistanceRangeSet.empty())
62  return 0;
63 
64  vec3 center = actor->transform() ? actor->transform()->worldMatrix() * actor->lod(0)->boundingBox().center() : actor->lod(0)->boundingBox().center();
65  double dist = (camera->modelingMatrix().getT() - center).length();
66 
67  // we assume the distances are sorted in increasing order
68  int i=0;
69  for(; i<(int)mDistanceRangeSet.size(); ++i)
70  {
71  if (dist<mDistanceRangeSet[i])
72  return i;
73  }
74 
75  return i; // == mDistanceRangeSet.size()
76  }
77 
78  const std::vector<double>& distanceRangeSet() const { return mDistanceRangeSet; }
79 
80  std::vector<double>& distanceRangeSet() { return mDistanceRangeSet; }
81 
82  protected:
83  std::vector<double> mDistanceRangeSet;
84  };
85 }
86 
87 #endif
Associates a Renderable object to an Effect and Transform.
Definition: Actor.hpp:130
const Renderable * lod(int lod_index) const
Returns the Renderable object representing the LOD level specifed by lod_index.
Definition: Actor.hpp:173
Transform * transform()
Returns the Transform bound tho an Actor.
Definition: Actor.hpp:190
std::vector< double > & distanceRangeSet()
vec3 center() const
Returns the center of the AABB.
Definition: AABB.cpp:184
#define VL_INSTRUMENT_CLASS(ClassName, BaseClass)
Definition: TypeInfo.hpp:122
Visualization Library main namespace.
std::vector< double > mDistanceRangeSet
const mat4 & modelingMatrix() const
Returns the Camera&#39;s modelingMatrix() (inverse of the view matrix).
Definition: Camera.hpp:169
const std::vector< double > & distanceRangeSet() const
const mat4 & worldMatrix() const
Returns the world matrix used for rendering.
Definition: Transform.hpp:168
virtual int evaluate(Actor *actor, Camera *camera)
Abstract class to compute the appropriate LOD of an Actor or Effect.
A LODEvaluator that computes the appropriate LOD based on the distance of an Actor from the Camera...
Vector3< T_Scalar > getT() const
Definition: Matrix4.hpp:131
T length(T v)
Definition: glsl_math.hpp:1084
Represents a virtual camera defining, among other things, the point of view from which scenes can be ...
Definition: Camera.hpp:50
const AABB & boundingBox() const
Returns the bounding box of a Renderable without recomputing the bounds if dirty. ...
Definition: Renderable.hpp:151