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From Marius Heise, "osgShadow was using single precision variables for light positioning and orientation. This was causing precision problems (shadow jumping) with big databases (eg. geocentric created vpb). This patch fixes this by using double precision variables for light positioning and orientation. It works for all algorithms dreived form osgShadow::StandardShadowMap.

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This commit is contained in:
Robert Osfield
2010-01-08 11:37:35 +00:00
parent a31aa512d7
commit 22ca8d2160
1 changed files with 5 additions and 4 deletions
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9
src/osgShadow/StandardShadowMap.cpp
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@@ -677,7 +677,7 @@ void StandardShadowMap::ViewData::aimShadowCastingCamera(
if( light->getSpotCutoff() < 180.0f) // spotlight, no need for bounding box
{
osg::Vec3 position(lightPos.x(), lightPos.y(), lightPos.z());
osg::Vec3d position(lightPos.x(), lightPos.y(), lightPos.z());
float spotAngle = light->getSpotCutoff();
projection.makePerspective( spotAngle, 1.0, 0.1, 1000.0);
@@ -687,14 +687,15 @@ void StandardShadowMap::ViewData::aimShadowCastingCamera(
{
if (lightPos[3]!=0.0) // point light
{
osg::Vec3 position(lightPos.x(), lightPos.y(), lightPos.z());
osg::Vec3d position(lightPos.x(), lightPos.y(), lightPos.z());
float centerDistance = (position-bs.center()).length();
float znear = centerDistance-bs.radius();
float zfar = centerDistance+bs.radius();
float zNearRatio = 0.001f;
if (znear<zfar*zNearRatio) znear = zfar*zNearRatio;
if (znear<zfar*zNearRatio)
znear = zfar*zNearRatio;
float top = (bs.radius()/centerDistance)*znear;
float right = top;
@@ -708,7 +709,7 @@ void StandardShadowMap::ViewData::aimShadowCastingCamera(
// set the position far away along the light direction
float radius = bs.radius();
osg::Vec3 position = bs.center() - lightDir * radius * 2;
osg::Vec3d position = bs.center() - lightDir * radius * 2;
float centerDistance = (position-bs.center()).length();