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Accidentally fix the one remaing case where shadows look awful while refactoring some stuff.

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This commit is contained in:
AnyOldName3 2018-05-18 22:39:57 +01:00
parent 9f0a49c303
commit 2c30bc1b4f
2 changed files with 61 additions and 0 deletions
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59
components/sceneutil/mwshadowtechnique.cpp
View file

@ -1239,6 +1239,10 @@ void MWShadowTechnique::cull(osgUtil::CullVisitor& cv)
}
}
if (settings->getMultipleShadowMapHint() == ShadowSettings::CASCADED)
cropShadowCameraToMainFrustum(frustum, camera, cascaseNear, cascadeFar);
else
cropShadowCameraToMainFrustum(frustum, camera, reducedNear, reducedFar);
osg::ref_ptr<VDSMCameraCullCallback> vdsmCallback = new VDSMCameraCullCallback(this, local_polytope);
camera->setCullCallback(vdsmCallback.get());
@ -2159,6 +2163,61 @@ struct RenderLeafBounds
double min_z, max_z;
};
bool MWShadowTechnique::cropShadowCameraToMainFrustum(Frustum& frustum, osg::Camera* camera, double viewNear, double viewFar)
{
osg::Matrixd light_p = camera->getProjectionMatrix();
osg::Matrixd light_v = camera->getViewMatrix();
osg::Matrixd light_vp = light_v * light_p;
ConvexHull convexHull;
convexHull.setToFrustum(frustum);
osg::Vec3d nearPoint = frustum.eye + frustum.frustumCenterLine * viewNear;
osg::Vec3d farPoint = frustum.eye + frustum.frustumCenterLine * viewFar;
double nearDist = -frustum.frustumCenterLine * nearPoint;
double farDist = frustum.frustumCenterLine * farPoint;
convexHull.clip(osg::Plane(frustum.frustumCenterLine, nearDist));
convexHull.clip(osg::Plane(-frustum.frustumCenterLine, farDist));
convexHull.transform(light_vp);
double xMin = -1.0, xMax = 1.0;
double yMin = -1.0, yMax = 1.0;
double zMin = -1.0, zMax = 1.0;
if (convexHull.valid())
{
xMin = osg::maximum(-1.0, convexHull.min(0));
xMax = osg::minimum(1.0, convexHull.max(0));
yMin = osg::maximum(-1.0, convexHull.min(1));
yMax = osg::minimum(1.0, convexHull.max(1));
}
else
return false;
// we always want the lightspace to include the computed near plane.
zMin = -1.0;
if (xMin != -1.0 || yMin != -1.0 || zMin != -1.0 ||
xMax != 1.0 || yMax != 1.0 || zMax != 1.0)
{
osg::Matrix m;
m.makeTranslate(osg::Vec3d(-0.5*(xMax + xMin),
-0.5*(yMax + yMin),
-0.5*(zMax + zMin)));
m.postMultScale(osg::Vec3d(2.0 / (xMax - xMin),
2.0 / (yMax - yMin),
2.0 / (zMax - zMin)));
light_p.postMult(m);
camera->setProjectionMatrix(light_p);
}
return true;
}
bool MWShadowTechnique::adjustPerspectiveShadowMapCameraSettings(osgUtil::RenderStage* renderStage, Frustum& frustum, LightData& /*positionedLight*/, osg::Camera* camera, double viewNear, double viewFar)
{
const ShadowSettings* settings = getShadowedScene()->getShadowSettings();

2
components/sceneutil/mwshadowtechnique.hpp
View file

@ -205,6 +205,8 @@ namespace SceneUtil {
virtual bool computeShadowCameraSettings(Frustum& frustum, LightData& positionedLight, osg::Matrixd& projectionMatrix, osg::Matrixd& viewMatrix);
virtual bool cropShadowCameraToMainFrustum(Frustum& frustum, osg::Camera* camera, double viewNear, double viewFar);
virtual bool adjustPerspectiveShadowMapCameraSettings(osgUtil::RenderStage* renderStage, Frustum& frustum, LightData& positionedLight, osg::Camera* camera, double viewNear, double viewFar);
virtual bool assignTexGenSettings(osgUtil::CullVisitor* cv, osg::Camera* camera, unsigned int textureUnit, osg::TexGen* texgen);