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implementing fcpw;
__include bounding_volumes;
public interface IBvhNode
{
// returns the bounding box of the node
BoundingBox getBoundingBox();
// sets the bounding box of the node
[mutating]
void setBoundingBox(BoundingBox box_);
// checks if the node has a bounding cone
bool hasBoundingCone();
// returns the bounding cone of the node
BoundingCone getBoundingCone();
// sets the bounding cone of the node
[mutating]
void setBoundingCone(BoundingCone cone_);
// checks if the node is a leaf node
bool isLeaf();
// returns the offset to the right child of the interior node
uint getRightChildOffset();
// returns the number of primitives in the node
uint getNumPrimitives();
// returns the offset to the first primitive of the leaf node
uint getPrimitiveOffset();
// returns the number of silhouettes in the node
uint getNumSilhouettes();
// returns the offset to the first silhouette of the leaf node
uint getSilhouetteOffset();
};
public struct BvhNode : IBvhNode
{
public BoundingBox box;
public uint nPrimitives;
public uint offset;
// returns the bounding box of the node
public BoundingBox getBoundingBox()
{
return box;
}
// sets the bounding box of the node
[mutating]
public void setBoundingBox(BoundingBox box_)
{
box = box_;
}
// checks if the node has a bounding cone
public bool hasBoundingCone()
{
return false;
}
// returns the bounding cone of the node
public BoundingCone getBoundingCone()
{
return BoundingCone();
}
// sets the bounding cone of the node
[mutating]
public void setBoundingCone(BoundingCone cone_)
{
// do nothing
}
// checks if the node is a leaf node
public bool isLeaf()
{
return nPrimitives > 0;
}
// returns the offset to the right child of the interior node
public uint getRightChildOffset()
{
return offset;
}
// returns the number of primitives in the node
public uint getNumPrimitives()
{
return nPrimitives;
}
// returns the offset to the first primitive of the leaf node
public uint getPrimitiveOffset()
{
return offset;
}
// returns the number of silhouettes in the node
public uint getNumSilhouettes()
{
return 0;
}
// returns the offset to the first silhouette of the leaf node
public uint getSilhouetteOffset()
{
return 0;
}
};
public struct SnchNode : IBvhNode
{
public BoundingBox box;
public BoundingCone cone;
public uint nPrimitives;
public uint offset;
public uint nSilhouettes;
public uint silhouetteOffset;
// returns the bounding box of the node
public BoundingBox getBoundingBox()
{
return box;
}
// sets the bounding box of the node
[mutating]
public void setBoundingBox(BoundingBox box_)
{
box = box_;
}
// checks if the node has a bounding cone
public bool hasBoundingCone()
{
return true;
}
// returns the bounding cone of the node
public BoundingCone getBoundingCone()
{
return cone;
}
// sets the bounding cone of the node
[mutating]
public void setBoundingCone(BoundingCone cone_)
{
cone = cone_;
}
// checks if the node is a leaf node
public bool isLeaf()
{
return nPrimitives > 0;
}
// returns the offset to the right child of the interior node
public uint getRightChildOffset()
{
return offset;
}
// returns the number of primitives in the node
public uint getNumPrimitives()
{
return nPrimitives;
}
// returns the offset to the first primitive of the leaf node
public uint getPrimitiveOffset()
{
return offset;
}
// returns the number of silhouettes in the node
public uint getNumSilhouettes()
{
return nSilhouettes;
}
// returns the offset to the first silhouette of the leaf node
public uint getSilhouetteOffset()
{
return silhouetteOffset;
}
};
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