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Various additions to better support view dependent overlay node, and updated wrappers

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This commit is contained in:
Robert Osfield
2007-05-19 13:43:38 +00:00
parent e3747b1004
commit e37ec98748
8 changed files with 446 additions and 40 deletions
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29
include/osg/Plane
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@@ -216,6 +216,35 @@ class OSG_EXPORT Plane
return -1; // treat points on line as outside...
}
/** intersection test between plane and vertex list
return 1 if the bs is completely above plane,
return 0 if the bs intersects the plane,
return -1 if the bs is completely below the plane.*/
inline int intersect(const std::vector<Vec3d>& vertices) const
{
if (vertices.empty()) return -1;
int noAbove = 0;
int noBelow = 0;
int noOn = 0;
for(std::vector<Vec3d>::const_iterator itr=vertices.begin();
itr != vertices.end();
++itr)
{
float d = distance(*itr);
if (d>0.0f) ++noAbove;
else if (d<0.0f) ++noBelow;
else ++noOn;
}
if (noAbove>0)
{
if (noBelow>0) return 0;
else return 1;
}
return -1; // treat points on line as outside...
}
/** intersection test between plane and bounding sphere.
return 1 if the bs is completely above plane,
return 0 if the bs intersects the plane,

27
include/osg/Polytope
View File

@@ -59,13 +59,26 @@ class OSG_EXPORT Polytope
/** Create a Polytope which is a cube, centered at 0,0,0, with sides of 2 units.*/
void setToUnitFrustum(bool withNear=true, bool withFar=true)
{
_planeList.erase(_planeList.begin(),_planeList.end());
_planeList.push_back(Plane(1.0f,0.0f,0.0f,1.0f)); // left plane.
_planeList.push_back(Plane(-1.0f,0.0f,0.0f,1.0f)); // right plane.
_planeList.push_back(Plane(0.0f,1.0f,0.0f,1.0f)); // bottom plane.
_planeList.push_back(Plane(0.0f,-1.0f,0.0f,1.0f)); // top plane.
if (withNear) _planeList.push_back(Plane(0.0f,0.0f,-1.0f,1.0f)); // near plane
if (withFar) _planeList.push_back(Plane(0.0f,0.0f,1.0f,1.0f)); // far plane
_planeList.clear();
_planeList.push_back(Plane(1.0,0.0,0.0,1.0)); // left plane.
_planeList.push_back(Plane(-1.0,0.0,0.0,1.0)); // right plane.
_planeList.push_back(Plane(0.0,1.0,0.0,1.0)); // bottom plane.
_planeList.push_back(Plane(0.0,-1.0,0.0,1.0)); // top plane.
if (withNear) _planeList.push_back(Plane(0.0,0.0,-1.0,1.0)); // near plane
if (withFar) _planeList.push_back(Plane(0.0,0.0,1.0,1.0)); // far plane
setupMask();
}
/** Create a Polytope which is a equivilant to BoundingBox.*/
void setToBoundingBox(const BoundingBox& bb)
{
_planeList.clear();
_planeList.push_back(Plane(1.0,0.0,0.0,-bb.xMin())); // left plane.
_planeList.push_back(Plane(-1.0,0.0,0.0,bb.xMax())); // right plane.
_planeList.push_back(Plane(0.0,1.0,0.0,-bb.yMin())); // bottom plane.
_planeList.push_back(Plane(0.0,-1.0,0.0,bb.yMax())); // top plane.
_planeList.push_back(Plane(0.0,0.0,-1.0,bb.zMin())); // near plane
_planeList.push_back(Plane(0.0,0.0,1.0,bb.zMax())); // far plane
setupMask();
}