FGFS-4.1/OpenSceneGraph
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Added support for clampping the near and far values in othrographic projection.

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Fixed the handling of anaglyphic/stereo state in SceneView::draw().
This commit is contained in:
Robert Osfield
2003-08-08 00:36:51 +00:00
parent a11395feec
commit 8a737dd2ca
2 changed files with 119 additions and 10 deletions
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24
src/osgUtil/CullVisitor.cpp
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@@ -179,16 +179,36 @@ void CullVisitor::popProjectionMatrix()
if (projection(0,3)==0.0f && projection(1,3)==0.0f && projection(2,3)==0.0f)
{
//cout << "Orthographic projection "<<projection<<endl;
//std::cout << "Orthographic projection "<<projection<<std::endl;
double span = (_computed_zfar-_computed_zfar);
double desired_znear = _computed_znear + span*0.02f;
double desired_zfar = _computed_zfar - span*0.02f;
// near plane clamping.
//double min_near_plane = _computed_zfar*_nearFarRatio;
//if (desired_znear<min_near_plane) desired_znear=min_near_plane;
// assign the clamped values back to the computed values.
_computed_znear = desired_znear;
_computed_zfar = desired_zfar;
projection(2,2)=-2.0f/(desired_zfar-desired_znear);
projection(3,2)=-(desired_zfar+desired_znear)/(desired_zfar-desired_znear);
//projection(2,2)=-2.0f/(-desired_zfar+desired_znear);
//projection(3,2)=(desired_zfar+desired_znear)/(desired_zfar-desired_znear);
}
else
{
//cout << "Perspective projection "<<projection<<endl;
//std::cout << "Perspective projection "<<projection<<std::endl;
double desired_znear = _computed_znear *0.98f;
double desired_zfar = _computed_zfar *1.02f;
// near plane clamping.
double min_near_plane = _computed_zfar*_nearFarRatio;
if (desired_znear<min_near_plane) desired_znear=min_near_plane;