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Improved the handling of depth partitioning and orthographic datasets

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This commit is contained in:
Robert Osfield 2011-08-25 17:21:38 +00:00
parent 1ad9979cea
commit 966981f100
2 changed files with 93 additions and 32 deletions
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2
include/osgShadow/ViewDependentShadowMap
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@ -49,7 +49,7 @@ class OSGSHADOW_EXPORT ViewDependentShadowMap : public ShadowTechnique
struct OSGSHADOW_EXPORT Frustum
{
Frustum(osgUtil::CullVisitor* cv);
Frustum(osgUtil::CullVisitor* cv, double minZNear, double maxZFar);
osg::Matrixd projectionMatrix;
osg::Matrixd modelViewMatrix;

123
src/osgShadow/ViewDependentShadowMap.cpp
View File

@ -320,7 +320,7 @@ ViewDependentShadowMap::ShadowData::ShadowData(ViewDependentShadowMap::ViewDepen
//_camera->setClearColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
_camera->setClearColor(osg::Vec4(0.0f,0.0f,0.0f,0.0f));
//_camera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
_camera->setComputeNearFarMode(osg::Camera::COMPUTE_NEAR_FAR_USING_BOUNDING_VOLUMES);
// set viewport
_camera->setViewport(0,0,textureSize,textureSize);
@ -359,7 +359,7 @@ ViewDependentShadowMap::ShadowData::ShadowData(ViewDependentShadowMap::ViewDepen
//
// Frustum
//
ViewDependentShadowMap::Frustum::Frustum(osgUtil::CullVisitor* cv):
ViewDependentShadowMap::Frustum::Frustum(osgUtil::CullVisitor* cv, double minZNear, double maxZFar):
corners(8),
faces(6),
edges(12)
@ -369,14 +369,17 @@ ViewDependentShadowMap::Frustum::Frustum(osgUtil::CullVisitor* cv):
OSG_INFO<<"Projection matrix "<<projectionMatrix<<std::endl;
osgUtil::CullVisitor::value_type zNear = cv->getCalculatedNearPlane();
osgUtil::CullVisitor::value_type zFar = cv->getCalculatedFarPlane();
if (cv->getComputeNearFarMode()!=osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR)
{
double zNear = osg::maximum(static_cast<double>(cv->getCalculatedNearPlane()),minZNear);
double zFar = osg::minimum(static_cast<double>(cv->getCalculatedFarPlane()),maxZFar);
cv->clampProjectionMatrix(projectionMatrix,zNear,zFar);
OSG_INFO<<"zNear = "<<zNear<<", zFar = "<<zFar<<std::endl;
OSG_INFO<<"Projection matrix after clamping "<<projectionMatrix<<std::endl;
cv->clampProjectionMatrix(projectionMatrix, zNear, zFar);
OSG_INFO<<"zNear = "<<zNear<<", zFar = "<<zFar<<std::endl;
OSG_INFO<<"Projection matrix after clamping "<<projectionMatrix<<std::endl;
}
corners[0].set(-1.0,-1.0,-1.0);
corners[1].set(1.0,-1.0,-1.0);
corners[2].set(1.0,-1.0,1.0);
@ -574,9 +577,34 @@ void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
OSG_INFO<<"cv->getProjectionMatrix()="<<*cv.getProjectionMatrix()<<std::endl;
osg::CullSettings::ComputeNearFarMode cachedNearFarMode = cv.getComputeNearFarMode();
#if 1
osg::RefMatrix& viewProjectionMatrix = *cv.getProjectionMatrix();
// check whether this main views projection is perspective or orthographic
bool orthographicViewFrustum = viewProjectionMatrix(0,3)==0.0 &&
viewProjectionMatrix(1,3)==0.0 &&
viewProjectionMatrix(2,3)==0.0;
double minZNear = 0.0;
double maxZFar = DBL_MAX;
if (cachedNearFarMode==osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR)
{
double left, right, top, bottom;
if (orthographicViewFrustum)
{
viewProjectionMatrix.getOrtho(left, right, bottom, top, minZNear, maxZFar);
}
else
{
viewProjectionMatrix.getFrustum(left, right, bottom, top, minZNear, maxZFar);
}
OSG_INFO<<"minZNear="<<minZNear<<", maxZFar="<<maxZFar<<std::endl;
}
// set the compute near/far mode to the highest quality setting to ensure we push the near plan out as far as possible
cv.setComputeNearFarMode(osg::CullSettings::COMPUTE_NEAR_FAR_USING_PRIMITIVES);
#endif
// 1. Traverse main scene graph
cv.pushStateSet( _shadowRecievingPlaceholderStateSet.get() );
@ -586,9 +614,14 @@ void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
cv.popStateSet();
// make sure that the near plane is computed correctly so that any projection matrix computations
// are all done correctly.
cv.computeNearPlane();
if (cv.getComputeNearFarMode()!=osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR)
{
// make sure that the near plane is computed correctly so that any projection matrix computations
// are all done correctly.
cv.computeNearPlane();
}
Frustum frustum(&cv, minZNear, maxZFar);
// return compute near far mode back to it's original settings
cv.setComputeNearFarMode(cachedNearFarMode);
@ -602,8 +635,6 @@ void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
unsigned int textureUnit = _baseShadowTextureUnit;
unsigned int numValidShadows = 0;
Frustum frustum(&cv);
ShadowDataList& sdl = vdd->getShadowDataList();
ShadowDataList previous_sdl;
previous_sdl.swap(sdl);
@ -682,7 +713,7 @@ void ViewDependentShadowMap::cull(osgUtil::CullVisitor& cv)
cv.popStateSet();
if (_shadowMapProjectionHint==PERSPECTIVE_SHADOW_MAP)
if (!orthographicViewFrustum && _shadowMapProjectionHint==PERSPECTIVE_SHADOW_MAP)
{
adjustPerspectiveShadowMapCameraSettings(vdsmCallback->getRenderStage(), frustum, pl, camera.get());
if (vdsmCallback->getProjectionMatrix())
@ -1278,6 +1309,7 @@ struct ConvexHull
struct RenderLeafBounds
{
RenderLeafBounds():
numRenderLeaf(0),
n(0.0),
previous_modelview(0),
clip_min_x(-1.0), clip_max_x(1.0),
@ -1303,6 +1335,8 @@ struct RenderLeafBounds
void operator() (const osgUtil::RenderLeaf* renderLeaf)
{
++numRenderLeaf;
if (renderLeaf->_modelview.get()!=previous_modelview)
{
previous_modelview = renderLeaf->_modelview.get();
@ -1372,6 +1406,8 @@ struct RenderLeafBounds
if (ls.z()>max_z) max_z=ls.z();
}
unsigned int numRenderLeaf;
osg::Matrixd light_vp;
osg::Vec3d eye_ls;
double n;
@ -1450,19 +1486,24 @@ bool ViewDependentShadowMap::adjustPerspectiveShadowMapCameraSettings(osgUtil::R
OSG_NOTICE<<"clipped ls ConvexHull zMin="<<convexHull.min(2)<<", zMax="<<convexHull.max(2)<<std::endl;
#endif
if (convexHull.min(0)!=-1.0 || convexHull.min(1)!=-1.0 || convexHull.min(2)!=-1.0 ||
convexHull.max(0)!=1.0 || convexHull.max(1)!=1.0 || convexHull.max(2)!=1.0)
double xMin = osg::maximum(-1.0,convexHull.min(0));
double xMax = osg::minimum(1.0,convexHull.max(0));
double yMin = osg::maximum(-1.0,convexHull.min(1));
double yMax = osg::minimum(1.0,convexHull.max(1));
double zMin = osg::maximum(-1.0,convexHull.min(2));
double zMax = osg::minimum(1.0,convexHull.max(2));
if (xMin!=-1.0 || yMin!=-1.0 || zMin!=-1.0 ||
xMax!=1.0 || yMax!=1.0 || zMax!=1.0)
{
double zMin = -1.0;
osg::Matrix m;
m.makeTranslate(osg::Vec3d(-0.5*(convexHull.max(0)+convexHull.min(0)),
-0.5*(convexHull.max(1)+convexHull.min(1)),
-0.5*(convexHull.max(2)+zMin)));
m.makeTranslate(osg::Vec3d(-0.5*(xMax+xMin),
-0.5*(yMax+yMin),
-0.5*(zMax+zMin)));
m.postMultScale(osg::Vec3d(2.0/(convexHull.max(0)-convexHull.min(0)),
2.0/(convexHull.max(1)-convexHull.min(1)),
2.0/(convexHull.max(2)-zMin)));
m.postMultScale(osg::Vec3d(2.0/(xMax-xMin),
2.0/(yMax-yMin),
2.0/(zMax-zMin)));
convexHull.transform(m);
light_p.postMult(m);
@ -1476,7 +1517,6 @@ bool ViewDependentShadowMap::adjustPerspectiveShadowMapCameraSettings(osgUtil::R
//return true;
}
osg::Vec3d eye_v = frustum.eye * light_v;
osg::Vec3d centerNearPlane_v = frustum.centerNearPlane * light_v;
osg::Vec3d center_v = frustum.center * light_v;
@ -1491,6 +1531,7 @@ bool ViewDependentShadowMap::adjustPerspectiveShadowMapCameraSettings(osgUtil::R
return true;
}
//OSG_NOTICE<<"gamma="<<osg::RadiansToDegrees(gamma_v)<<std::endl;
//OSG_NOTICE<<"eye_v="<<eye_v<<std::endl;
//OSG_NOTICE<<"viewdir_v="<<viewdir_v<<std::endl;
@ -1519,10 +1560,14 @@ bool ViewDependentShadowMap::adjustPerspectiveShadowMapCameraSettings(osgUtil::R
double min_n = osg::maximum(-1.0-eye_ls.y(), 0.01);
if (n<min_n)
{
// OSG_NOTICE<<"Clamping n to eye point"<<std::endl;
OSG_INFO<<"Clamping n to eye point"<<std::endl;
n=min_n;
}
//n = min_n;
//n = 0.01;
//n = z_n;
double f = n+d;
@ -1535,6 +1580,11 @@ bool ViewDependentShadowMap::adjustPerspectiveShadowMapCameraSettings(osgUtil::R
osg::Matrixd lightView;
lightView.makeLookAt(virtual_eye, virtual_eye+lightdir, up);
#if 0
OSG_NOTICE<<"n = "<<n<<", f="<<f<<std::endl;
OSG_NOTICE<<"eye_ls = "<<eye_ls<<", virtual_eye="<<virtual_eye<<std::endl;
OSG_NOTICE<<"frustum.eye_ls="<<frustum.eye<<std::endl;
#endif
double min_x_ratio = 0.0;
double max_x_ratio = 0.0;
@ -1552,8 +1602,14 @@ bool ViewDependentShadowMap::adjustPerspectiveShadowMapCameraSettings(osgUtil::R
RenderLeafTraverser<RenderLeafBounds> rli;
rli.set(osg::Matrix::inverse(frustum.modelViewMatrix) * light_vp, virtual_eye, n);
rli.traverse(renderStage);
#if 0
OSG_NOTICE<<"Time for RenderLeafTraverser "<<timer.elapsedTime_m()<<"ms"<<std::endl;
if (rli.numRenderLeaf==0)
{
return false;
}
#if 0
OSG_NOTICE<<"Time for RenderLeafTraverser "<<timer.elapsedTime_m()<<"ms, number of render leaves "<<rli.numRenderLeaf<<std::endl;
OSG_NOTICE<<"scene bounds min_x="<<rli.min_x<<", max_x="<<rli.max_x<<std::endl;
OSG_NOTICE<<"scene bounds min_y="<<rli.min_y<<", max_y="<<rli.max_y<<std::endl;
OSG_NOTICE<<"scene bounds min_z="<<rli.min_z<<", max_z="<<rli.max_z<<std::endl;
@ -1584,8 +1640,13 @@ bool ViewDependentShadowMap::adjustPerspectiveShadowMapCameraSettings(osgUtil::R
0.0, 0.0, 1.0/best_z_ratio, 0.0,
0.0, b, 0.0, 0.0 );
osg::Matrixd light_persp = light_p * lightView * lightPerspective;
osg::Matrixd light_view_persp = light_v * light_persp;
#if 0
OSG_NOTICE<<"light_p = "<<light_p<<std::endl;
OSG_NOTICE<<"lightView = "<<lightView<<std::endl;
OSG_NOTICE<<"lightPerspective = "<<lightPerspective<<std::endl;
OSG_NOTICE<<"light_persp result = "<<light_persp<<std::endl;
#endif
camera->setProjectionMatrix(light_persp);
return true;