[3255] | 1 | #pragma once
|
---|
| 2 | #include "RenderTechnique.h"
|
---|
| 3 |
|
---|
| 4 | /**
|
---|
| 5 | @brief Base abstract class __declspec( dllexport ) of rendering a light volume of a particle system.
|
---|
| 6 |
|
---|
| 7 | Light volumes are used when self shadowing of particle systems should be simulated.
|
---|
| 8 | Each layer of the volume represents the amount of transmitted light. The current implementation uses four grayscale layers,
|
---|
| 9 | and places these layers to the four channel of the light volume texture.
|
---|
| 10 | */
|
---|
| 11 | class __declspec( dllexport ) IllumVolumeRenderTechnique : virtual public RenderTechnique
|
---|
| 12 | {
|
---|
| 13 | public:
|
---|
| 14 | /**
|
---|
| 15 | @brief Constructor.
|
---|
| 16 |
|
---|
| 17 | @param startFrame adds an offset to the current frame number to help evenly distribute updates between frames
|
---|
| 18 | @param illumVolumeUpdateInterval the update frequency of the light volume
|
---|
| 19 | @param illumTextureResolution the resolution of the light volume texture
|
---|
| 20 | @param textureDepth the number of layers to use (should be set to 1)
|
---|
| 21 | @param useDistCalc flag to skip updates if the shaded particle system is far away (not used)
|
---|
| 22 | @param useHierarchicalImpostor set this flag to true if the particle system is a hierarchical particle system
|
---|
| 23 | @param parentRenderable the object to operate on
|
---|
| 24 | @param parentTechniqueGroup the TechniqueGroup this RenderedTechnique is attached to
|
---|
| 25 | */
|
---|
| 26 | IllumVolumeRenderTechnique(
|
---|
| 27 | unsigned long startFrame,
|
---|
| 28 | unsigned long illumVolumeUpdateInterval,
|
---|
| 29 | unsigned int illumTextureResolution,
|
---|
| 30 | unsigned int textureDepth,
|
---|
| 31 | bool useDistCalc,
|
---|
| 32 | bool useHierarchicalImpostor,
|
---|
| 33 | ElementaryRenderable* parentRenderable,
|
---|
| 34 | TechniqueGroup* parentTechniqueGroup
|
---|
| 35 | );
|
---|
| 36 | virtual ~IllumVolumeRenderTechnique();
|
---|
| 37 |
|
---|
| 38 | //inherited
|
---|
| 39 | void update(unsigned long frameNum);
|
---|
| 40 | //inherited
|
---|
| 41 | void runChanged(RenderingRunType runType, RenderingRun* run);
|
---|
| 42 | //inherited
|
---|
| 43 | void runUpdated(RenderingRunType runType, RenderingRun* run);
|
---|
| 44 |
|
---|
| 45 | protected:
|
---|
| 46 | /**
|
---|
| 47 | @brief the update frequency of the light volume
|
---|
| 48 | */
|
---|
| 49 | unsigned long illumVolumeUpdateInterval;
|
---|
| 50 | /**
|
---|
| 51 | @brief the resolution of the light volume texture
|
---|
| 52 | */
|
---|
| 53 | unsigned int illumTextureResolution;
|
---|
| 54 | /**
|
---|
| 55 | @brief the number of layers to use (should be set to 1)
|
---|
| 56 | */
|
---|
| 57 | unsigned int textureDepth;
|
---|
| 58 | /**
|
---|
| 59 | @brief offset in frame number used during update
|
---|
| 60 | */
|
---|
| 61 | unsigned long startFrame;
|
---|
| 62 | /**
|
---|
| 63 | @brief flag to skip updates if the shaded particle system is far away (not used)
|
---|
| 64 | */
|
---|
| 65 | bool useDistCalc;
|
---|
| 66 | /**
|
---|
| 67 | @brief set this flag to true if the particle system is a hierarchical particle system
|
---|
| 68 | */
|
---|
| 69 | bool useHierarchicalImpostor;
|
---|
| 70 |
|
---|
| 71 | /**
|
---|
| 72 | @brief creates a light volume rendering run needed by this technique
|
---|
| 73 |
|
---|
| 74 | @return pointer to the created LightVolumeRenderingRun instance
|
---|
| 75 | */
|
---|
| 76 | virtual RenderingRun* createLightVolumeRenderingRun()=0;
|
---|
| 77 | /**
|
---|
| 78 | @brief Called if the LightVolumeRenderingRun is chaged
|
---|
| 79 |
|
---|
| 80 | @param pointer to the new LightVolumeRenderingRun instance to use
|
---|
| 81 | */
|
---|
| 82 | virtual void lightVolumeChanged(RenderingRun* run) = 0;
|
---|
| 83 | /**
|
---|
| 84 | @brief Called if the LightVolumeRenderingRun is updated
|
---|
| 85 |
|
---|
| 86 | @param pointer to the updated LightVolumeRenderingRun instance
|
---|
| 87 | */
|
---|
| 88 | virtual void lightVolumeUpdated(RenderingRun* run) = 0;
|
---|
| 89 | /**
|
---|
| 90 | @brief Called if the ChildParticleSystemRenderingRun is chaged
|
---|
| 91 |
|
---|
| 92 | Only called if this particle system is a hierarchical particle system.
|
---|
| 93 |
|
---|
| 94 | @param pointer to the new ChildParticleSystemRenderingRun instance to use
|
---|
| 95 | */
|
---|
| 96 | virtual void hierarchicalImpostorUpdated(RenderingRun* run) = 0;
|
---|
| 97 |
|
---|
| 98 | }; |
---|