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Transfer changes to cull to new shadow technique

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pull/1547/head
AnyOldName3 7 years ago
parent 4c31b38f77
commit 0f1e770c53
1 changed files with 88 additions and 6 deletions
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94
components/sceneutil/mwshadowtechnique.cpp
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@ -769,6 +769,12 @@ void MWShadowTechnique::update(osg::NodeVisitor& nv)
void MWShadowTechnique::cull(osgUtil::CullVisitor& cv)
{
/* TODO: if (!enableShadows)
{
_shadowedScene->osg::Group::traverse(cv);
return;
}*/
OSG_INFO<<std::endl<<std::endl<<"MWShadowTechnique::cull(osg::CullVisitor&"<<&cv<<")"<<std::endl;
if (!_shadowCastingStateSet)
@ -848,6 +854,18 @@ void MWShadowTechnique::cull(osgUtil::CullVisitor& cv)
Frustum frustum(&cv, minZNear, maxZFar);
double reducedNear, reducedFar;
if (cv.getComputeNearFarMode() != osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR)
{
reducedNear = osg::maximum<double>(cv.getCalculatedNearPlane(), minZNear);
reducedFar = osg::minimum<double>(cv.getCalculatedFarPlane(), maxZFar);
}
else
{
reducedNear = minZNear;
reducedFar = maxZFar;
}
// return compute near far mode back to it's original settings
cv.setComputeNearFarMode(cachedNearFarMode);
@ -868,11 +886,6 @@ void MWShadowTechnique::cull(osgUtil::CullVisitor& cv)
previous_sdl.swap(sdl);
unsigned int numShadowMapsPerLight = settings->getNumShadowMapsPerLight();
if (numShadowMapsPerLight>2)
{
OSG_NOTICE<<"numShadowMapsPerLight of "<<numShadowMapsPerLight<<" is greater than maximum supported, falling back to 2."<<std::endl;
numShadowMapsPerLight = 2;
}
LightDataList& pll = vdd->getLightDataList();
for(LightDataList::iterator itr = pll.begin();
@ -943,6 +956,20 @@ void MWShadowTechnique::cull(osgUtil::CullVisitor& cv)
double yMid = (clsb._bb.yMin()+clsb._bb.yMax())*0.5f;
double yRange = (clsb._bb.yMax()-clsb._bb.yMin());
osg::Matrixd cornerConverter = osg::Matrixd::inverse(projectionMatrix) * osg::Matrixd::inverse(viewMatrix) * *cv.getModelViewMatrix();
double minZ = DBL_MAX;
double maxZ = -DBL_MAX;
for (unsigned int i = 0; i < 8; i++)
{
osg::Vec3 corner = clsb._bb.corner(i);
corner = corner * cornerConverter;
maxZ = osg::maximum<double>(maxZ, -corner.z());
minZ = osg::minimum<double>(minZ, -corner.z());
}
reducedNear = osg::maximum<double>(reducedNear, minZ);
reducedFar = osg::minimum<double>(reducedFar, maxZ);
// OSG_NOTICE<<" xMid="<<xMid<<", yMid="<<yMid<<", xRange="<<xRange<<", yRange="<<yRange<<std::endl;
projectionMatrix =
@ -1006,6 +1033,22 @@ void MWShadowTechnique::cull(osgUtil::CullVisitor& cv)
previous_sdl.erase(previous_sdl.begin());
}
/* TODO: if (debugHud)
{
osg::ref_ptr<osg::Texture2D> texture = sd->_texture;
osg::ref_ptr<osg::StateSet> stateSet = debugGeometry[sm_i]->getOrCreateStateSet();
stateSet->setTextureAttributeAndModes(debugTextureUnit, texture, osg::StateAttribute::ON);
unsigned int traversalMask = cv.getTraversalMask();
cv.setTraversalMask(debugGeometry[sm_i]->getNodeMask());
cv.pushStateSet(stateSet);
debugCameras[sm_i]->accept(cv);
cv.popStateSet();
cv.setTraversalMask(traversalMask);
cv.getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
}*/
osg::ref_ptr<osg::Camera> camera = sd->_camera;
camera->setProjectionMatrix(projectionMatrix);
@ -1031,12 +1074,51 @@ void MWShadowTechnique::cull(osgUtil::CullVisitor& cv)
#if 0
double r_start = (sm_i==0) ? -1.0 : (double(sm_i)/double(numShadowMapsPerLight)*2.0-1.0);
double r_end = (sm_i+1==numShadowMapsPerLight) ? 1.0 : (double(sm_i+1)/double(numShadowMapsPerLight)*2.0-1.0);
#endif
#elif 0
// hardwired for 2 splits
double r_start = (sm_i==0) ? -1.0 : splitPoint;
double r_end = (sm_i+1==numShadowMapsPerLight) ? 1.0 : splitPoint;
#else
double r_start, r_end;
// split system based on the original Parallel Split Shadow Maps paper.
double n = reducedNear;
double f = reducedFar;
double i = double(sm_i);
double m = double(numShadowMapsPerLight);
double ratio = 0.5; // TODO: Settings::Manager::getFloat("split point uniform logarithmic ratio", "Shadows");
double deltaBias = 0.0; // TODO: Settings::Manager::getFloat("split point bias", "Shadows");
if (sm_i == 0)
r_start = -1.0;
else
{
// compute the split point in main camera view
double ciLog = n * pow(f / n, i / m);
double ciUniform = n + (f - n) * i / m;
double ci = ratio * ciLog + (1.0 - ratio) * ciUniform + deltaBias;
// work out where this is in light space
osg::Vec3d worldSpacePos = frustum.eye + frustum.frustumCenterLine * ci;
osg::Vec3d lightSpacePos = worldSpacePos * viewMatrix * projectionMatrix;
r_start = lightSpacePos.y();
}
if (sm_i + 1 == numShadowMapsPerLight)
r_end = 1.0;
else
{
// compute the split point in main camera view
double ciLog = n * pow(f / n, (i + 1) / m);
double ciUniform = n + (f - n) * (i + 1) / m;
double ci = ratio * ciLog + (1.0 - ratio) * ciUniform + deltaBias;
// work out where this is in light space
osg::Vec3d worldSpacePos = frustum.eye + frustum.frustumCenterLine * ci;
osg::Vec3d lightSpacePos = worldSpacePos * viewMatrix * projectionMatrix;
r_end = lightSpacePos.y();
}
#endif
// for all by the last shadowmap shift the r_end so that it overlaps slightly with the next shadowmap
// to prevent a seam showing through between the shadowmaps
if (sm_i+1<numShadowMapsPerLight) r_end+=0.01;

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