1 | #ifndef __RENDERQUEUE_H
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2 | #define __RENDERQUEUE_H
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3 |
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4 | #include "common.h"
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5 | #include "Timer/PerfTimer.h"
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6 |
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7 |
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8 | namespace CHCDemoEngine
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9 | {
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10 |
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11 | class RenderState;
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12 | class Camera;
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13 |
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14 |
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15 | /** Defines a bucket for scene entities that have the same properties.
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16 | */
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17 | struct RenderQueueBucket
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18 | {
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19 | ////////
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20 | //-- the attributes used to sort the materials
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21 | /// texture parameters
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22 | int mTexHeight;
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23 | int mTexWidth;
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24 | int mTexFormat;
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25 |
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26 | bool mHasTexture;
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27 |
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28 | bool mColorWriteEnabled;
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29 | bool mDepthWriteEnabled;
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30 | bool mLightingEnabled;
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31 |
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32 | bool mAlphaTestEnabled;
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33 | bool mCullFaceEnabled;
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34 |
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35 | //bool mHasVertexProgram;
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36 | //bool mHasFragmentProgram;
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37 | ShaderProgram *mVertexProgram;
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38 | ShaderProgram *mFragmentProgram;
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39 |
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40 | /// minimal distance to the camera
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41 | float mMinDistance;
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42 |
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43 | /// the shapes that belong to a bucket
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44 | ShapeContainer mShapes;
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45 | };
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46 |
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47 |
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48 | /** This class implements a render queue that sorts renderable geometry in order
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49 | to minimize state changes while approximately keeping front-to-back order
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50 | The implementation roughly follows the suggested implementation in
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51 | Tom Forsyth's article on render state changes. It requires sorting only on
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52 | bucket level and therefore has very low overhead.
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53 | */
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54 | class RenderQueue
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55 | {
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56 | public:
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57 |
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58 | /** Default constructor
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59 | */
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60 | RenderQueue();
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61 | /** Constructor taking a render queue
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62 | */
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63 | RenderQueue(RenderState *state, Camera *cam);
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64 |
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65 | ~RenderQueue();
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66 | /** Enqueues an entity.
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67 | */
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68 | void Enqueue(SceneEntity *entity);
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69 | /** Enqueues a single shape.
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70 | */
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71 | void Enqueue(Shape *shape);
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72 | /** Sets the current render state
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73 | */
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74 | void SetRenderState(RenderState *state);
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75 | /** Sets the current render state
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76 | */
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77 | void SetCamera(Camera *cam);
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78 | /** Returns the number of entries currently in the queue.
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79 | */
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80 | inline int GetSize() const { return (int)mNumEntries; }
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81 | /** Renders and clears the queue.
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82 | */
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83 | void Apply();
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84 | /** Clears the render queue
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85 | */
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86 | void Clear();
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87 |
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88 | protected:
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89 |
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90 | void Sort();
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91 |
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92 | inline bool FitsInBucket(Shape *shape, size_t idx) const;
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93 | /** Renders the contents of the render queue.
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94 | */
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95 | void Render();
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96 | /** Prints the current state of the render queue.
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97 | */
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98 | void Print();
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99 |
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100 |
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101 | ///////////
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102 |
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103 | RenderState *mState;
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104 |
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105 | Camera *mCamera;
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106 | //SceneEntityContainer mEntities;
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107 | int mMinSizeForSorting;
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108 | /// each bucket contains objects with similar materials that don't cause a hard state change
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109 | std::vector<RenderQueueBucket *> mBuckets;
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110 |
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111 | int mNumEntries;
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112 | };
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113 |
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114 |
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115 | }
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116 |
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117 | #endif
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