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Frustum sphere culling.

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Do a sphere<->camera sphere and a sphere<->frustum before the box<->frustum test.
This commit is contained in:
Kester Maddock
2004-05-21 09:21:15 +00:00
parent 1217928e66
commit e957b12f0e
9 changed files with 368 additions and 84 deletions
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26
source/gameengine/SceneGraph/SG_Spatial.cpp
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@@ -50,7 +50,7 @@ SG_Spatial(
m_localPosition(MT_Point3(0,0,0)),
m_localRotation(1,0,0,0,1,0,0,0,1),
m_localScaling(MT_Vector3(1.f,1.f,1.f)),
m_worldPosition(MT_Point3(0,0,0)),
m_worldRotation(0,0,0,0,0,0,0,0,0),
m_worldScaling(MT_Vector3(1.f,1.f,1.f)),
@@ -74,7 +74,8 @@ SG_Spatial(
m_parent_relation(NULL),
m_bbox(other.m_bbox)
m_bbox(other.m_bbox),
m_radius(other.m_radius)
{
// duplicate the parent relation for this object
m_parent_relation = other.m_parent_relation->NewCopy();
@@ -118,7 +119,8 @@ UpdateSpatialData(
for (;cit!=c_end;++cit)
{
bComputesWorldTransform = bComputesWorldTransform || (*cit)->Update(time);
if ((*cit)->Update(time))
bComputesWorldTransform = true;
}
// If none of the objects updated our values then we ask the
@@ -126,9 +128,9 @@ UpdateSpatialData(
// our world coordinates.
if (!bComputesWorldTransform)
{
{
ComputeWorldTransforms(parent);
}
}
}
void SG_Spatial::ComputeWorldTransforms(const SG_Spatial *parent)
@@ -299,18 +301,26 @@ void SG_Spatial::SetBBox(SG_BBox& bbox)
m_bbox = bbox;
}
MT_Transform SG_Spatial::GetWorldTransform() const
{
return MT_Transform(m_worldPosition, m_worldRotation.scaled(m_worldScaling[0], m_worldScaling[1], m_worldScaling[2]));
}
bool SG_Spatial::inside(const MT_Point3 &point) const
{
return m_bbox.transform(MT_Transform(m_worldPosition, m_worldRotation.scaled(m_worldScaling[0], m_worldScaling[1], m_worldScaling[2]))).inside(point);
MT_Scalar radius = m_worldScaling[m_worldScaling.closestAxis()]*m_radius;
return (m_worldPosition.distance2(point) <= radius*radius) ?
m_bbox.transform(GetWorldTransform()).inside(point) :
false;
}
void SG_Spatial::getBBox(MT_Point3 *box) const
{
m_bbox.get(box, MT_Transform(m_worldPosition, m_worldRotation.scaled(m_worldScaling[0], m_worldScaling[1], m_worldScaling[2])));
m_bbox.get(box, GetWorldTransform());
}
void SG_Spatial::getAABBox(MT_Point3 *box) const
{
m_bbox.getaa(box, MT_Transform(m_worldPosition, m_worldRotation.scaled(m_worldScaling[0], m_worldScaling[1], m_worldScaling[2])));
m_bbox.getaa(box, GetWorldTransform());
}