From Adrian Egli, improvements to ParallelSplitShadowMap implementation
This commit is contained in:
Robert Osfield
parent
8e91926ca5
commit
1047f970bb
@ -502,10 +502,8 @@ int main(int argc, char** argv)
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arguments.getApplicationUsage()->addCommandLineOption("--minNearSplit", "ParallelSplitShadowMap shadow map near offset.");//ADEGLI
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arguments.getApplicationUsage()->addCommandLineOption("--maxFarDist", "ParallelSplitShadowMap max far distance to shadow.");//ADEGLI
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arguments.getApplicationUsage()->addCommandLineOption("--moveVCamFactor", "ParallelSplitShadowMap move the virtual frustum behind the real camera, (also back ground object can cast shadow).");//ADEGLI
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arguments.getApplicationUsage()->addCommandLineOption("--NVidia", "ParallelSplitShadowMap set default PolygonOffset for NVidia.");//ADEGLI
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arguments.getApplicationUsage()->addCommandLineOption("--PolyOffset-Factor", "ParallelSplitShadowMap set PolygonOffset factor.");//ADEGLI
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arguments.getApplicationUsage()->addCommandLineOption("--PolyOffset-Unit", "ParallelSplitShadowMap set PolygonOffset unit.");//ADEGLI
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arguments.getApplicationUsage()->addCommandLineOption("--CullFaceFront", "ParallelSplitShadowMap add a cull face: front.");//ADEGLI
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arguments.getApplicationUsage()->addCommandLineOption("-1", "Use test model one.");
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@ -626,20 +624,12 @@ int main(int argc, char** argv)
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}
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double polyoffsetfactor = -0.02;
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double polyoffsetunit = 1.0;
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double polyoffsetfactor = pssm->getPolygonOffset().x();
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double polyoffsetunit = pssm->getPolygonOffset().y();
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while (arguments.read("--PolyOffset-Factor", polyoffsetfactor));
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while (arguments.read("--PolyOffset-Unit", polyoffsetunit));
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pssm->setPolygonOffset(osg::Vec2(polyoffsetfactor,polyoffsetunit)); //ATI Radeon
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if (arguments.read("--NVidia")){
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//pssm->setPolygonOffset(osg::Vec2(-0.02,1.0)); //ATI Radeon
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pssm->setPolygonOffset(osg::Vec2(10.0f,20.0f)); //NVidia
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}
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if ( arguments.read("--CullFaceFront") ) {
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pssm->forceFrontCullFace();
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}
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pssm->setPolygonOffset(osg::Vec2(polyoffsetfactor,polyoffsetunit));
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shadowedScene->setShadowTechnique(pssm.get());
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}
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@ -11,13 +11,24 @@
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* OpenSceneGraph Public License for more details.
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*/
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/* ParallelSplitShadowMap written by Adrian Egli */
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/* ParallelSplitShadowMap written by Adrian Egli
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*
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* this version has still a bug in mutli-thread application (flickering problem)
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* to avoid the flickering problem try osgShadow --pssm --SingleThreaded your_scene.ive
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*
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* The Parallel Split Shadow Map only supports directional light for simulating the shadow.
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* It's one of the most robust algorithm for huge terrain sun light's shadow simulation, if
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* you need to shadow a terrain, or another huge scene, you should use Parallel Split Shadow Map
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* or at least test it against your scene. Have fun.
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*
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*/
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#ifndef OSGSHADOW_ParallelSplitShadowMap
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#define OSGSHADOW_ParallelSplitShadowMap 1
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#include <osg/Camera>
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#include <osg/Material>
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#include <osg/Depth>
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#include <osgShadow/ShadowTechnique>
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@ -63,35 +74,22 @@ class OSGSHADOW_EXPORT ParallelSplitShadowMap : public ShadowTechnique
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/** Set the factor for moving the virtual camera behind the real camera*/
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inline void setMoveVCamBehindRCamFactor(double distFactor ) { _move_vcam_behind_rcam_factor = distFactor; }
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/** Force to add a cull face front */
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inline void forceFrontCullFace() { _useFrontCullFace = true; }
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/** Set min near distance for splits */
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inline void setMinNearDistanceForSplits(double nd){ _split_min_near_dist=nd; }
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/** use linear split (default: linear) */
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inline void useLinearSplit(bool flag) { _linearSplit = flag;}
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/**
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light / |
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\ / |
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min near dist / |
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for splits / |
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\ / ¦ |
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./ \ ¦ |
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| \ ¦ |
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| x ¦ |
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| ¦ |
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. | |
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\ ¦ |
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\ ¦ |
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\ |
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\ |
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\ |
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.<- max far dist. ->.
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/** set a user defined light for shadow simulation (sun light, ... )
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* when this light get passed to pssm, the scene's light are no longer collected
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* and simulated. just this user passed light, it needs to be a directional light.
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*/
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inline void setUserLight(osg::Light* light) { _userLight = light; }
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/** Set the values for the ambient bias the shader will use.*/
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void setAmbientBias(const osg::Vec2& ambientBias );
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protected :
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virtual ~ParallelSplitShadowMap() {}
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@ -105,16 +103,15 @@ class OSGSHADOW_EXPORT ParallelSplitShadowMap : public ShadowTechnique
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osg::ref_ptr<osg::Texture2D> _texture;
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osg::ref_ptr<osg::StateSet> _stateset;
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unsigned int _textureUnit;
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osg::Vec2d _ambientBias;
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osg::ref_ptr<osg::Depth> _depth;
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osg::ref_ptr<osg::Camera> _debug_camera;
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osg::ref_ptr<osg::Texture2D> _debug_texture;
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osg::ref_ptr<osg::StateSet> _debug_stateset;
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unsigned int _debug_textureUnit;
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// Light (SUN)
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osg::Vec3d _lightCameraSource;
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osg::Vec3d _lightCameraTarget;
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@ -158,14 +155,18 @@ class OSGSHADOW_EXPORT ParallelSplitShadowMap : public ShadowTechnique
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double _setMaxFarDistance;
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bool _isSetMaxFarDistance;
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bool _useFrontCullFace;
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double _split_min_near_dist;
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double _move_vcam_behind_rcam_factor;
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bool _linearSplit;
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osg::Light* _userLight;
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osg::Uniform* _ambientBiasUniform;
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osg::Vec2d _ambientBias;
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};
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}
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#endif
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@ -16,7 +16,19 @@
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* THE SOFTWARE.
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*/
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/* ParallelSplitShadowMap written by Adrian Egli */
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/* ##################################################################################################### */
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/* ParallelSplitShadowMap written by Adrian Egli (3dhelp (at) gmail.com) */
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/* ##################################################################################################### */
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/* */
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/* the pssm main idea is based on: */
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/* */
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/* Parallel-Split Shadow Maps for Large-scale Virtual Environments */
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/* Fan Zhang Hanqiu Sun Leilei Xu Lee Kit Lun */
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/* The Chinese University of Hong Kong */
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/* */
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/* Refer to our latest project webpage for "Parallel-Split Shadow Maps on Programmable GPUs" in GPU Gems */
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/* */
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/* ##################################################################################################### */
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#include <osgShadow/ParallelSplitShadowMap>
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@ -32,20 +44,18 @@
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#include <osg/Geometry>
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#include <osgDB/ReadFile>
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#include <osg/Texture1D>
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#include <osg/Depth>
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#include <osg/ShadeModel>
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using namespace osgShadow;
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// split scheme
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#define TEXTURE_RESOLUTION 1024
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//#define ADAPTIVE_TEXTURE_RESOLUTION
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#define LINEAR_SPLIT true
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#define LINEAR_SPLIT false
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//#define SMOOTH_SHADOW //experimental
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#define ZNEAR_MIN_FROM_LIGHT_SOURCE 2.0
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#define MOVE_VIRTUAL_CAMERA_BEHIND_REAL_CAMERA_FACTOR 0.0
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@ -63,15 +73,16 @@ using namespace osgShadow;
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std::string ParallelSplitShadowMap::generateGLSL_FragmentShader_BaseTex(bool debug, unsigned int splitCount) {
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std::stringstream sstr;
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/// base texture
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sstr << "uniform sampler2D baseTexture; " << std::endl;
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#ifdef SMOOTH_SHADOW
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sstr << "uniform sampler2D randomTexture; " << std::endl;
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#endif
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sstr << "uniform float enableBaseTexture; " << std::endl;
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sstr << "uniform vec2 ambientBias;" << std::endl;
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for (unsigned int i=0;i<_number_of_splits;i++) {
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sstr << "uniform sampler2DShadow shadowTexture" << i <<"; " << std::endl;
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//TODO: sstr << "uniform vec2 ambientBias" << i <<"; " << std::endl;
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sstr << "uniform float zShadow" << i <<"; " << std::endl;
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}
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@ -79,26 +90,33 @@ std::string ParallelSplitShadowMap::generateGLSL_FragmentShader_BaseTex(bool deb
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sstr << "{" << std::endl;
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if ( debug ) {
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sstr << " vec4 coord = vec4(0,0,0,1);"<<std::endl;
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} else {
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sstr << " vec4 coord = gl_FragCoord;"<<std::endl;
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}
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#ifdef SMOOTH_SHADOW
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for (unsigned int i=0;i<_number_of_splits;i++) {
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sstr << " float shadow" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+1) <<"]).r;" << std::endl;
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sstr << " vec4 random" << i <<" = "<<(1.25/(double)_resolution)<<"*coord.z*texture2D(randomTexture,gl_TexCoord[" << (i+1) <<"].st); " << std::endl;
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sstr << " float shadow1" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+1) <<"]+random" << i <<".r*vec4(-1,-1,0,0)).r;" << std::endl;
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sstr << " float shadow2" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+1) <<"]+random" << i <<".g*vec4(1,-1,0,0)).r;" << std::endl;
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sstr << " float shadow3" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+1) <<"]+random" << i <<".b*vec4(1,1,0,0)).r;" << std::endl;
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sstr << " float shadow4" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+1) <<"]+random" << i <<".a*vec4(-1,1,0,0)).r;" << std::endl;
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sstr << " float shadow" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+_textureUnitOffset) <<"]).r;" << std::endl;
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sstr << " vec4 random" << i <<" = "<<(1.15/(double)_resolution)<<"*coord.z*texture2D(randomTexture,gl_TexCoord[" << (i+_textureUnitOffset) <<"].st); " << std::endl;
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sstr << " float shadow1" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+_textureUnitOffset) <<"]+random" << i <<".r*vec4(-1,-1,0,0)).r;" << std::endl;
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sstr << " float shadow2" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+_textureUnitOffset) <<"]+random" << i <<".g*vec4(1,-1,0,0)).r;" << std::endl;
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sstr << " float shadow3" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+_textureUnitOffset) <<"]+random" << i <<".b*vec4(1,1,0,0)).r;" << std::endl;
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sstr << " float shadow4" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+_textureUnitOffset) <<"]+random" << i <<".a*vec4(-1,1,0,0)).r;" << std::endl;
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sstr << " shadow" << i <<" = shadow" << i <<" + shadow1" << i <<" + shadow2" << i <<" + shadow3" << i <<" + shadow4" << i <<";" << std::endl;
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sstr << " shadow" << i <<" = shadow" << i <<"*0.2;" << std::endl;
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}
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#else
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for (unsigned int i=0;i<_number_of_splits;i++) {
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sstr << " float shadow" << i <<" = shadow2DProj( shadowTexture" << i <<",gl_TexCoord[" << (i+_textureUnitOffset) <<"]).r;" << std::endl;
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}
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#endif
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sstr << " float term0 = (1.0-shadow0); " << std::endl;
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for (unsigned int i=1;i<_number_of_splits;i++) {
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sstr << " float term" << i << " = (1.0-shadow"<<i<<");"<< std::endl; // * (step(coord.z,zShadow"<<(i-1)<<")); " << std::endl;
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sstr << " float term" << i << " = (1.0-shadow"<<i<<");"<< std::endl;
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}
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// v => SHADOW filter; " << std::endl;
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@ -125,7 +143,7 @@ std::string ParallelSplitShadowMap::generateGLSL_FragmentShader_BaseTex(bool deb
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sstr << " sumTerm=sumTerm+term" << i << ";" << std::endl;
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}
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sstr << " vec4 color = gl_Color * ( 1.0 - sumTerm ) + (sumTerm)* gl_Color*vec4(c0,(1.0-c0)*c1,(1.0-c0)*(1.0-c1)*c2,1.0); " << std::endl;
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sstr << " vec4 color = gl_Color*( 1.0 - sumTerm ) + (sumTerm)* gl_Color*vec4(c0,(1.0-c0)*c1,(1.0-c0)*(1.0-c1)*c2,1.0); " << std::endl;
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} else {
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sstr << " vec4 color = gl_Color; "<< std::endl;
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@ -137,7 +155,7 @@ std::string ParallelSplitShadowMap::generateGLSL_FragmentShader_BaseTex(bool deb
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sstr << " float enableBaseTextureFilter = enableBaseTexture*(1.0 - step(texcolor.x+texcolor.y+texcolor.z+texcolor.a,0.0)); " << std::endl; //18
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sstr << " vec4 colorTex = color*texcolor;" << std::endl;
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sstr << " gl_FragColor = (color*(1.0-enableBaseTextureFilter) + colorTex*enableBaseTextureFilter)*(1.0-0.30*v); "<< std::endl;
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sstr << " gl_FragColor = ((color*(ambientBias.x+1.0)*(1.0-enableBaseTextureFilter)) + colorTex*(1.0+ambientBias.x)*enableBaseTextureFilter)*(1.0-ambientBias.y*v); "<< std::endl;
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sstr << "}"<< std::endl;
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@ -161,63 +179,64 @@ template<class Type> inline Type Clamp(Type A, Type Min, Type Max) {
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ParallelSplitShadowMap::ParallelSplitShadowMap(osg::Geode** gr, int icountplanes) :
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_textureUnitOffset(1),
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_debug_color_in_GLSL(false),
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_user_polgyonOffset_set(false),
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_resolution(TEXTURE_RESOLUTION),
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_isSetMaxFarDistance(false),
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_useFrontCullFace(false),
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_split_min_near_dist(ZNEAR_MIN_FROM_LIGHT_SOURCE),
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_linearSplit(LINEAR_SPLIT),
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_move_vcam_behind_rcam_factor(MOVE_VIRTUAL_CAMERA_BEHIND_REAL_CAMERA_FACTOR)
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_textureUnitOffset(1),
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_debug_color_in_GLSL(false),
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_user_polgyonOffset_set(false),
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_resolution(TEXTURE_RESOLUTION),
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_isSetMaxFarDistance(false),
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_split_min_near_dist(ZNEAR_MIN_FROM_LIGHT_SOURCE),
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_linearSplit(LINEAR_SPLIT),
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_move_vcam_behind_rcam_factor(MOVE_VIRTUAL_CAMERA_BEHIND_REAL_CAMERA_FACTOR),
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_userLight(NULL),
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_ambientBias(0.1,0.3),
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_ambientBiasUniform(NULL)
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{
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_displayTexturesGroupingNode = gr;
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_number_of_splits = icountplanes;
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//_polgyonOffset.set(10.0f,20.0f);
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_polgyonOffset.set(-0.02f,1.0f);
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_polgyonOffset.set(0.01f,0.01f);
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}
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ParallelSplitShadowMap::ParallelSplitShadowMap(const ParallelSplitShadowMap& copy, const osg::CopyOp& copyop):
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ShadowTechnique(copy,copyop),
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_textureUnitOffset(copy._textureUnitOffset),
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_debug_color_in_GLSL(copy._debug_color_in_GLSL),
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_user_polgyonOffset_set(copy._user_polgyonOffset_set),
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_resolution(copy._resolution),
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_isSetMaxFarDistance(copy._isSetMaxFarDistance),
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_useFrontCullFace(copy._useFrontCullFace),
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_split_min_near_dist(copy._split_min_near_dist),
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_linearSplit(copy._linearSplit),
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_number_of_splits(copy._number_of_splits),
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_polgyonOffset(copy._polgyonOffset),
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_setMaxFarDistance(copy._setMaxFarDistance),
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_move_vcam_behind_rcam_factor(copy._move_vcam_behind_rcam_factor)
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ShadowTechnique(copy,copyop),
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_textureUnitOffset(copy._textureUnitOffset),
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_debug_color_in_GLSL(copy._debug_color_in_GLSL),
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_user_polgyonOffset_set(copy._user_polgyonOffset_set),
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_resolution(copy._resolution),
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_isSetMaxFarDistance(copy._isSetMaxFarDistance),
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_split_min_near_dist(copy._split_min_near_dist),
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_linearSplit(copy._linearSplit),
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_number_of_splits(copy._number_of_splits),
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_polgyonOffset(copy._polgyonOffset),
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_setMaxFarDistance(copy._setMaxFarDistance),
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_move_vcam_behind_rcam_factor(copy._move_vcam_behind_rcam_factor),
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_userLight(copy._userLight),
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_ambientBias(copy._ambientBias)
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{
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}
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void ParallelSplitShadowMap::setAmbientBias(const osg::Vec2& ambientBias)
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{
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_ambientBias = ambientBias;
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if (_ambientBiasUniform ) _ambientBiasUniform->set(_ambientBias);
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}
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void ParallelSplitShadowMap::init(){
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if (!_shadowedScene) return;
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osg::StateSet* sharedStateSet = new osg::StateSet;
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unsigned int iCamerasMax=_number_of_splits;
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for (unsigned int iCameras=0;iCameras<iCamerasMax;iCameras++)
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{
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PSSMShadowSplitTexture pssmShadowSplitTexture;
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pssmShadowSplitTexture._splitID = iCameras;
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pssmShadowSplitTexture._textureUnit = iCameras+_textureUnitOffset;
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//pssmShadowSplitTexture._ambientBias = osg::Vec2(0.9-(double)iCameras/10.0,0.1+(double)iCameras/10.0);
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pssmShadowSplitTexture._ambientBias = osg::Vec2(0.0,1.0);
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pssmShadowSplitTexture._resolution =
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#ifdef ADAPTIVE_TEXTURE_RESOLUTION
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_resolution / pow(2,iCameras);
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#else
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_resolution ;
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#endif
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pssmShadowSplitTexture._resolution = max(pssmShadowSplitTexture._resolution ,128);
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osg::notify(osg::INFO) << "ParallelSplitShadowMap : Texture ID=" << iCameras << " Resolution=" << pssmShadowSplitTexture._resolution << std::endl;
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pssmShadowSplitTexture._resolution = _resolution;
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osg::notify(osg::DEBUG_INFO) << "ParallelSplitShadowMap : Texture ID=" << iCameras << " Resolution=" << pssmShadowSplitTexture._resolution << std::endl;
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// set up the texture to render into
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{
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pssmShadowSplitTexture._texture = new osg::Texture2D;
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@ -241,6 +260,7 @@ void ParallelSplitShadowMap::init(){
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pssmShadowSplitTexture._camera = new osg::Camera;
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pssmShadowSplitTexture._camera->setCullCallback(new CameraCullCallback(this));
|
||||
|
||||
|
||||
#ifndef SHADOW_TEXTURE_DEBUG
|
||||
pssmShadowSplitTexture._camera->setClearMask(GL_DEPTH_BUFFER_BIT);
|
||||
pssmShadowSplitTexture._camera->setClearColor(osg::Vec4(1.0,1.0,1.0,1.0));
|
||||
@ -263,6 +283,7 @@ void ParallelSplitShadowMap::init(){
|
||||
}
|
||||
#endif
|
||||
pssmShadowSplitTexture._camera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
|
||||
pssmShadowSplitTexture._camera->setReferenceFrame(osg::Camera::ABSOLUTE_RF_INHERIT_VIEWPOINT);
|
||||
|
||||
// set viewport
|
||||
pssmShadowSplitTexture._camera->setViewport(0,0,pssmShadowSplitTexture._resolution,pssmShadowSplitTexture._resolution);
|
||||
@ -281,25 +302,34 @@ void ParallelSplitShadowMap::init(){
|
||||
#endif
|
||||
osg::StateSet* stateset = pssmShadowSplitTexture._camera->getOrCreateStateSet();
|
||||
|
||||
if ( 1 ) {
|
||||
|
||||
pssmShadowSplitTexture._depth = new osg::Depth;
|
||||
stateset->setAttribute(pssmShadowSplitTexture._depth.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
float factor = _polgyonOffset.x();
|
||||
float units = _polgyonOffset.y();
|
||||
//std::cout << "PSSM PolygonOffset: units=" << units << " factor=" << factor << std::endl;
|
||||
osg::ref_ptr<osg::PolygonOffset> polygon_offset = new osg::PolygonOffset;
|
||||
//polygon_offset->setFactorAndUnitsMultipliersUsingBestGuessForDriver();
|
||||
polygon_offset->setFactor(factor);
|
||||
polygon_offset->setUnits(units);
|
||||
stateset->setAttribute(polygon_offset.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
||||
stateset->setMode(GL_POLYGON_OFFSET_FILL, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
||||
}
|
||||
|
||||
if ( _useFrontCullFace ) {
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
osg::ref_ptr<osg::CullFace> cull_face = new osg::CullFace;
|
||||
cull_face->setMode(osg::CullFace::FRONT);
|
||||
stateset->setAttribute(cull_face.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
||||
stateset->setMode(GL_CULL_FACE, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
osg::ShadeModel* shademodel = dynamic_cast<osg::ShadeModel*>(stateset->getAttribute(osg::StateAttribute::SHADEMODEL));
|
||||
if (!shademodel){shademodel = new osg::ShadeModel;stateset->setAttribute(shademodel);}
|
||||
shademodel->setMode( osg::ShadeModel::FLAT );
|
||||
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
|
||||
}
|
||||
}
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
// set up stateset and append texture, texGen ,...
|
||||
{
|
||||
pssmShadowSplitTexture._stateset = sharedStateSet;//new osg::StateSet;
|
||||
@ -315,28 +345,33 @@ void ParallelSplitShadowMap::init(){
|
||||
|
||||
}
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
// set up shader (GLSL)
|
||||
#ifdef SHADOW_TEXTURE_GLSL
|
||||
|
||||
osg::Program* program = new osg::Program;
|
||||
pssmShadowSplitTexture._stateset->setAttribute(program);
|
||||
|
||||
|
||||
//osg::Shader* fragment_shader = new osg::Shader(osg::Shader::FRAGMENT, fragmentShaderSource_BaseTex);
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
// GLSL PROGRAMS
|
||||
osg::Shader* fragment_shader = new osg::Shader(osg::Shader::FRAGMENT, generateGLSL_FragmentShader_BaseTex(_displayTexturesGroupingNode!=NULL,iCameras).c_str());
|
||||
program->addShader(fragment_shader);
|
||||
|
||||
std::stringstream strST; strST << "shadowTexture" << (pssmShadowSplitTexture._textureUnit-1);
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
// UNIFORMS
|
||||
std::stringstream strST; strST << "shadowTexture" << (pssmShadowSplitTexture._textureUnit-_textureUnitOffset);
|
||||
osg::Uniform* shadowTextureSampler = new osg::Uniform(strST.str().c_str(),(int)(pssmShadowSplitTexture._textureUnit));
|
||||
pssmShadowSplitTexture._stateset->addUniform(shadowTextureSampler);
|
||||
|
||||
//TODO: NOT YET SUPPORTED in the current version of the shader
|
||||
//std::stringstream strAB; strAB << "ambientBias" << (pssmShadowSplitTexture._textureUnit-1);
|
||||
//osg::Uniform* ambientBias = new osg::Uniform(strAB.str().c_str(),pssmShadowSplitTexture._ambientBias);
|
||||
//pssmShadowSplitTexture._stateset->addUniform(ambientBias);
|
||||
if ( ! _ambientBiasUniform ) {
|
||||
_ambientBiasUniform = new osg::Uniform("ambientBias",_ambientBias);
|
||||
pssmShadowSplitTexture._stateset->addUniform(_ambientBiasUniform);
|
||||
}
|
||||
|
||||
|
||||
std::stringstream strzShadow; strzShadow << "zShadow" << (pssmShadowSplitTexture._textureUnit-1);
|
||||
std::stringstream strzShadow; strzShadow << "zShadow" << (pssmShadowSplitTexture._textureUnit-_textureUnitOffset);
|
||||
pssmShadowSplitTexture._farDistanceSplit = new osg::Uniform(strzShadow.str().c_str(),1.0f);
|
||||
pssmShadowSplitTexture._stateset->addUniform(pssmShadowSplitTexture._farDistanceSplit);
|
||||
|
||||
@ -354,6 +389,7 @@ void ParallelSplitShadowMap::init(){
|
||||
pssmShadowSplitTexture._stateset->addUniform(enableBaseTexture);
|
||||
}
|
||||
|
||||
for (unsigned int textLoop(0);textLoop<_textureUnitOffset;textLoop++)
|
||||
{
|
||||
// fake texture for baseTexture, add a fake texture
|
||||
// we support by default at least one texture layer
|
||||
@ -370,24 +406,26 @@ void ParallelSplitShadowMap::init(){
|
||||
image->setInternalTextureFormat(GL_RGBA);
|
||||
// fill in the image data.
|
||||
osg::Vec4* dataPtr = (osg::Vec4*)image->data();
|
||||
osg::Vec4 color(0,0,0,0);
|
||||
osg::Vec4f color(1.0f,1.0f,1.0f,0.0f);
|
||||
*dataPtr = color;
|
||||
// make fake texture
|
||||
osg::Texture2D* texture = new osg::Texture2D;
|
||||
texture->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_BORDER);
|
||||
texture->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_BORDER);
|
||||
texture->setBorderColor(osg::Vec4(1.0,1.0,1.0,1.0));
|
||||
texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
|
||||
texture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
|
||||
texture->setImage(image);
|
||||
// add fake texture
|
||||
pssmShadowSplitTexture._stateset->setTextureAttribute(0,texture,osg::StateAttribute::ON);
|
||||
pssmShadowSplitTexture._stateset->setTextureMode(0,GL_TEXTURE_1D,osg::StateAttribute::OFF);
|
||||
pssmShadowSplitTexture._stateset->setTextureMode(0,GL_TEXTURE_2D,osg::StateAttribute::ON);
|
||||
pssmShadowSplitTexture._stateset->setTextureMode(0,GL_TEXTURE_3D,osg::StateAttribute::OFF);
|
||||
pssmShadowSplitTexture._stateset->setTextureAttribute(textLoop,texture,osg::StateAttribute::ON);
|
||||
pssmShadowSplitTexture._stateset->setTextureMode(textLoop,GL_TEXTURE_1D,osg::StateAttribute::OFF);
|
||||
pssmShadowSplitTexture._stateset->setTextureMode(textLoop,GL_TEXTURE_2D,osg::StateAttribute::ON);
|
||||
pssmShadowSplitTexture._stateset->setTextureMode(textLoop,GL_TEXTURE_3D,osg::StateAttribute::OFF);
|
||||
}
|
||||
|
||||
|
||||
|
||||
#ifdef SMOOTH_SHADOW
|
||||
{
|
||||
// texture for randomTexture (for smoothing shadow edges)
|
||||
osg::Image* image = new osg::Image;
|
||||
@ -420,7 +458,7 @@ void ParallelSplitShadowMap::init(){
|
||||
pssmShadowSplitTexture._stateset->setTextureMode(_textureUnitOffset+_number_of_splits,GL_TEXTURE_2D,osg::StateAttribute::ON);
|
||||
pssmShadowSplitTexture._stateset->setTextureMode(_textureUnitOffset+_number_of_splits,GL_TEXTURE_3D,osg::StateAttribute::OFF);
|
||||
}
|
||||
|
||||
#endif
|
||||
#endif
|
||||
|
||||
|
||||
@ -499,7 +537,7 @@ void ParallelSplitShadowMap::cull(osgUtil::CullVisitor& cv){
|
||||
cv.pushStateSet(pssmShadowSplitTexture._stateset.get());
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
// DEGUBG
|
||||
// DEBUG
|
||||
if ( _displayTexturesGroupingNode ) {
|
||||
cv.pushStateSet(pssmShadowSplitTexture._debug_stateset.get());
|
||||
}
|
||||
@ -517,11 +555,15 @@ void ParallelSplitShadowMap::cull(osgUtil::CullVisitor& cv){
|
||||
cbbv.setTraversalMask(getShadowedScene()->getCastsShadowTraversalMask());
|
||||
_shadowedScene->osg::Group::traverse(cbbv);
|
||||
osg::BoundingBox bb = cbbv.getBoundingBox();
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
const osg::Light* selectLight = 0;
|
||||
|
||||
/// light pos and light direction
|
||||
osg::Vec4 lightpos;
|
||||
osg::Vec3 lightDirection;
|
||||
|
||||
if ( ! _userLight ) {
|
||||
// try to find a light in the scene
|
||||
osgUtil::PositionalStateContainer::AttrMatrixList& aml = orig_rs->getPositionalStateContainer()->getAttrMatrixList();
|
||||
for(osgUtil::PositionalStateContainer::AttrMatrixList::iterator itr = aml.begin();
|
||||
itr != aml.end();
|
||||
@ -545,6 +587,12 @@ void ParallelSplitShadowMap::cull(osgUtil::CullVisitor& cv){
|
||||
|
||||
lightpos = lightpos * eyeToWorld;
|
||||
lightDirection = lightDirection * eyeToWorld;
|
||||
}else{
|
||||
// take the user light as light source
|
||||
lightpos = _userLight->getPosition();
|
||||
lightDirection = _userLight->getDirection();
|
||||
selectLight = _userLight;
|
||||
}
|
||||
|
||||
if (selectLight)
|
||||
{
|
||||
@ -556,6 +604,7 @@ void ParallelSplitShadowMap::cull(osgUtil::CullVisitor& cv){
|
||||
{
|
||||
PSSMShadowSplitTexture pssmShadowSplitTexture = it->second;
|
||||
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
// SETUP pssmShadowSplitTexture for rendering
|
||||
//
|
||||
@ -645,7 +694,7 @@ void ParallelSplitShadowMap::cleanSceneGraph(){
|
||||
}
|
||||
|
||||
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
// Computes corner points of a frustum
|
||||
//
|
||||
//
|
||||
@ -658,30 +707,36 @@ const osg::Vec3f const_pointFarTL(-1.0f, 1.0f, 1.0f);
|
||||
const osg::Vec3f const_pointFarBL(-1.0f, -1.0f, 1.0f);
|
||||
const osg::Vec3f const_pointNearBL(-1.0f, -1.0f, -1.0f);
|
||||
const osg::Vec3f const_pointNearTL(-1.0f, 1.0f, -1.0f);
|
||||
//
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
|
||||
|
||||
void ParallelSplitShadowMap::calculateFrustumCorners(
|
||||
PSSMShadowSplitTexture &pssmShadowSplitTexture,
|
||||
osg::Vec3d *frustumCorners
|
||||
) {
|
||||
) {
|
||||
|
||||
// get user cameras
|
||||
double fovy,aspectRatio,camNear,camFar;
|
||||
pssmShadowSplitTexture._cameraProj.getPerspective(fovy,aspectRatio,camNear,camFar);
|
||||
|
||||
|
||||
// force to max far distance to show shadow, for some scene it can be solve performance problems.
|
||||
if ( _isSetMaxFarDistance ) {
|
||||
if (_setMaxFarDistance < camFar) camFar = _setMaxFarDistance;
|
||||
}
|
||||
|
||||
|
||||
// build camera matrix with some offsets (the user view camera)
|
||||
osg::Matrixf viewMat;
|
||||
osg::Vec3d camEye,camCenter,camUp;
|
||||
pssmShadowSplitTexture._cameraView.getLookAt(camEye,camCenter,camUp);
|
||||
osg::Vec3d viewDir = camCenter - camEye;
|
||||
//viewDir.normalize();
|
||||
viewDir.normalize();
|
||||
camEye = camEye - viewDir * _move_vcam_behind_rcam_factor;
|
||||
camFar += _move_vcam_behind_rcam_factor * viewDir.length();
|
||||
viewMat.makeLookAt(camEye,camCenter,camUp);
|
||||
|
||||
|
||||
if ( _isSetMaxFarDistance ) {
|
||||
if (_setMaxFarDistance < camFar) camFar = _setMaxFarDistance;
|
||||
}
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
/// CALCULATE SPLIT
|
||||
@ -692,7 +747,6 @@ void ParallelSplitShadowMap::calculateFrustumCorners(
|
||||
camFar = camNear + (camNearFar_Dist) * ((double)(pssmShadowSplitTexture._splitID+1))/((double)(_number_of_splits));
|
||||
camNear = camNear + (camNearFar_Dist) * ((double)(pssmShadowSplitTexture._splitID))/((double)(_number_of_splits));
|
||||
} else {
|
||||
|
||||
// Exponential split scheme:
|
||||
//
|
||||
// Ci = (n - f)*(i/numsplits)^(bias+1) + n;
|
||||
@ -703,7 +757,7 @@ void ParallelSplitShadowMap::calculateFrustumCorners(
|
||||
|
||||
for(int i=0;i<(int)_number_of_splits;i++) {
|
||||
float fIDM=i/(float)_number_of_splits;
|
||||
pSplitDistances[i]=(camFar-camNear)*(powf(fIDM,fSplitSchemeBias[1]+1))+camNear;
|
||||
pSplitDistances[i]=camNearFar_Dist*(powf(fIDM,fSplitSchemeBias[1]+1))+camNear;
|
||||
}
|
||||
// make sure border values are right
|
||||
pSplitDistances[0]=camNear;
|
||||
@ -713,16 +767,16 @@ void ParallelSplitShadowMap::calculateFrustumCorners(
|
||||
camFar = pSplitDistances[pssmShadowSplitTexture._splitID+1];
|
||||
|
||||
delete[] pSplitDistances;
|
||||
|
||||
}
|
||||
|
||||
|
||||
//pssmShadowSplitTexture._depth->setRange((camNear - minNear) / camNearFar_Dist,(camFar - minNear)/ camNearFar_Dist);
|
||||
pssmShadowSplitTexture._depth->setRange(0.0,1.0);
|
||||
pssmShadowSplitTexture._depth->setFunction(osg::Depth::LEQUAL);
|
||||
|
||||
#ifdef SHADOW_TEXTURE_GLSL
|
||||
float fVal = (float)((camFar-minNear)/camNearFar_Dist);
|
||||
//std::cout << pssmShadowSplitTexture._farDistanceSplit->getName() << " " << fVal << std::endl;
|
||||
pssmShadowSplitTexture._farDistanceSplit->set(fVal);
|
||||
|
||||
#endif
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
@ -746,6 +800,8 @@ void ParallelSplitShadowMap::calculateFrustumCorners(
|
||||
frustumCorners[6] = const_pointNearBL* invProjViewMat;
|
||||
frustumCorners[7] = const_pointNearTL* invProjViewMat;
|
||||
|
||||
|
||||
//std::cout << "camFar : "<<pssmShadowSplitTexture._splitID << " / " << camNear << "," << camFar << std::endl;
|
||||
}
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
@ -757,83 +813,85 @@ void ParallelSplitShadowMap::calculateLightInitalPosition(PSSMShadowSplitTexture
|
||||
pssmShadowSplitTexture._frustumSplitCenter +=frustumCorners[i];
|
||||
}
|
||||
pssmShadowSplitTexture._frustumSplitCenter /= 8.0;
|
||||
pssmShadowSplitTexture._lightCameraSource = pssmShadowSplitTexture._frustumSplitCenter;
|
||||
|
||||
//
|
||||
// To avoid edge problems, scale the frustum so
|
||||
// that it's at least a few pixels larger
|
||||
//
|
||||
for(int i=0;i<8;i++)
|
||||
{
|
||||
// scale by adding offset from center
|
||||
frustumCorners[i]+=(frustumCorners[i]-pssmShadowSplitTexture._frustumSplitCenter)*(0.25);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void ParallelSplitShadowMap::calculateLightNearFarFormFrustum(
|
||||
PSSMShadowSplitTexture &pssmShadowSplitTexture,
|
||||
osg::Vec3d *frustumCorners
|
||||
) {
|
||||
) {
|
||||
|
||||
//calculate near, far
|
||||
double zNear=-1;
|
||||
double zFar =-1;
|
||||
double zFar(-DBL_MAX);
|
||||
|
||||
|
||||
|
||||
|
||||
// force zNear > 0.0
|
||||
// set _split_min_near_dist(2.0m) distance to the nearest point
|
||||
int count = 0;
|
||||
while (zNear <= _split_min_near_dist && count++ < 10) {
|
||||
|
||||
// init zNear, zFar
|
||||
zNear= DBL_MAX;
|
||||
zFar =-DBL_MAX;
|
||||
|
||||
// calculate zNear, zFar
|
||||
// calculate zFar (as longest distance)
|
||||
for(int i=0;i<8;i++) {
|
||||
double dist_z_from_light = pssmShadowSplitTexture._lightDirection*(frustumCorners[i] - pssmShadowSplitTexture._lightCameraSource);
|
||||
if ( zNear > dist_z_from_light ) zNear = dist_z_from_light;
|
||||
double dist_z_from_light = fabs(pssmShadowSplitTexture._lightDirection*(frustumCorners[i] - pssmShadowSplitTexture._frustumSplitCenter));
|
||||
if ( zFar < dist_z_from_light ) zFar = dist_z_from_light;
|
||||
}
|
||||
|
||||
// update if zNear too small
|
||||
if ( zNear <= _split_min_near_dist ){
|
||||
osg::Vec3 dUpdate = - pssmShadowSplitTexture._lightDirection*(fabs(zNear)+_split_min_near_dist);
|
||||
pssmShadowSplitTexture._lightCameraSource = pssmShadowSplitTexture._lightCameraSource + dUpdate;
|
||||
}
|
||||
}
|
||||
// update camera position and look at center
|
||||
pssmShadowSplitTexture._lightCameraSource = pssmShadowSplitTexture._frustumSplitCenter - pssmShadowSplitTexture._lightDirection*(zFar+_split_min_near_dist);
|
||||
pssmShadowSplitTexture._lightCameraTarget = pssmShadowSplitTexture._frustumSplitCenter + pssmShadowSplitTexture._lightDirection*(zFar);
|
||||
// update near - far plane
|
||||
pssmShadowSplitTexture._lightNear = 0.01;
|
||||
pssmShadowSplitTexture._lightFar = zFar*2.0 + _split_min_near_dist;
|
||||
|
||||
|
||||
pssmShadowSplitTexture._lightCameraTarget = pssmShadowSplitTexture._frustumSplitCenter;//pssmShadowSplitTexture._lightCameraSource + pssmShadowSplitTexture._lightDirection;//*zFar;
|
||||
pssmShadowSplitTexture._lightNear = 0.1;//zNear;
|
||||
// calculate [zNear,zFar]
|
||||
zFar = (-DBL_MAX);
|
||||
double zNear(DBL_MAX);
|
||||
for(int i=0;i<8;i++) {
|
||||
double dist_z_from_light = fabs(pssmShadowSplitTexture._lightDirection*(frustumCorners[i] - pssmShadowSplitTexture._lightCameraSource));
|
||||
if ( zFar < dist_z_from_light ) zFar = dist_z_from_light;
|
||||
if ( zNear > dist_z_from_light ) zNear = dist_z_from_light;
|
||||
}
|
||||
// update near - far plane
|
||||
pssmShadowSplitTexture._lightNear = zNear - _split_min_near_dist + 0.01;
|
||||
pssmShadowSplitTexture._lightFar = zFar;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
void ParallelSplitShadowMap::calculateLightViewProjectionFormFrustum(PSSMShadowSplitTexture &pssmShadowSplitTexture,osg::Vec3d *frustumCorners) {
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
|
||||
// calculate top, left
|
||||
osg::Vec3d top(0,0,1);
|
||||
osg::Vec3d left;
|
||||
osg::Vec3d lightDir = pssmShadowSplitTexture._lightDirection;
|
||||
lightDir.normalize();
|
||||
|
||||
|
||||
// calculate the camera's coordinate system
|
||||
osg::Vec3d camEye,camCenter,camUp;
|
||||
pssmShadowSplitTexture._cameraView.getLookAt(camEye,camCenter,camUp);
|
||||
|
||||
osg::Vec3d viewDir(camCenter-camEye);
|
||||
viewDir.normalize();
|
||||
|
||||
osg::Vec3d camLeft = camUp ^ viewDir;
|
||||
osg::Vec3d camLeft(camUp ^ viewDir);
|
||||
camLeft.normalize();
|
||||
|
||||
top = lightDir ^ camLeft;
|
||||
left = top ^ lightDir;
|
||||
osg::Vec3d top(pssmShadowSplitTexture._lightDirection ^ camLeft);
|
||||
if(top.length2() < 0.5) top = pssmShadowSplitTexture._lightDirection ^ camUp;
|
||||
|
||||
double maxLeft,maxTop;
|
||||
double minLeft,minTop;
|
||||
osg::Vec3d left(top ^ pssmShadowSplitTexture._lightDirection);
|
||||
|
||||
osg::Vec3d fCenter = pssmShadowSplitTexture._frustumSplitCenter;
|
||||
|
||||
maxLeft = maxTop = -DBL_MAX;
|
||||
minLeft = minTop = DBL_MAX;
|
||||
for(int i = 0; i < 8; i++)
|
||||
// calculate the camera's frustum left,right,bottom,top parameters
|
||||
double maxLeft(-DBL_MAX),maxTop(-DBL_MAX);
|
||||
double minLeft(DBL_MAX),minTop(DBL_MAX);
|
||||
|
||||
for(int i(0); i < 8; i++)
|
||||
{
|
||||
osg::Vec3d diffCorner = pssmShadowSplitTexture._frustumSplitCenter - frustumCorners[i];
|
||||
double lLeft = (diffCorner*left) * 1.41425;
|
||||
double lTop = (diffCorner*top) * 1.41425;
|
||||
osg::Vec3d diffCorner(pssmShadowSplitTexture._lightCameraSource - frustumCorners[i]);
|
||||
double lLeft(diffCorner*left);
|
||||
double lTop(diffCorner*top);
|
||||
|
||||
if ( lLeft > maxLeft ) maxLeft = lLeft;
|
||||
if ( lTop > maxTop ) maxTop = lTop;
|
||||
@ -842,20 +900,13 @@ void ParallelSplitShadowMap::calculateLightViewProjectionFormFrustum(PSSMShadowS
|
||||
if ( lTop < minTop ) minTop = lTop;
|
||||
}
|
||||
|
||||
osg::Matrixd lightView;
|
||||
lightView.makeLookAt(pssmShadowSplitTexture._lightCameraSource,pssmShadowSplitTexture._lightCameraTarget,top);
|
||||
osg::Matrixd lightProj;
|
||||
|
||||
lightProj.makeOrtho(minLeft,maxLeft,minTop,maxTop,pssmShadowSplitTexture._lightNear,pssmShadowSplitTexture._lightFar);
|
||||
// make the camera view matrix
|
||||
pssmShadowSplitTexture._camera->setViewMatrixAsLookAt(pssmShadowSplitTexture._lightCameraSource,pssmShadowSplitTexture._lightCameraTarget,top);
|
||||
|
||||
pssmShadowSplitTexture._camera->setViewMatrix(lightView);
|
||||
pssmShadowSplitTexture._camera->setProjectionMatrix(lightProj);
|
||||
// use ortho projection for light (directional light only supported)
|
||||
pssmShadowSplitTexture._camera->setProjectionMatrixAsOrtho(minLeft,maxLeft,minTop,maxTop,pssmShadowSplitTexture._lightNear,pssmShadowSplitTexture._lightFar);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user