🗊 Презентация linear octree

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Слайды и текст этой презентации

Слайд 1


Linear Octree Ref: Tu and O’Hallaron 2004 Simple and Efficient Traversal Methods for Quadtrees and Octrees, Frisken and Perry 2002
Описание слайда:
Linear Octree Ref: Tu and O’Hallaron 2004 Simple and Efficient Traversal Methods for Quadtrees and Octrees, Frisken and Perry 2002

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Pointer-based Representation
Описание слайда:
Pointer-based Representation

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Linear Octree Assign a unique key (locational code) to each node Represent an octree as a collection of lear nodes comprising it Extremely useful in...
Описание слайда:
Linear Octree Assign a unique key (locational code) to each node Represent an octree as a collection of lear nodes comprising it Extremely useful in practice when main memory cannot accommodate a pointer-based octree

Слайд 4


Locational code The code for each node is of the same length (zero-padded) Level of the node is also attached
Описание слайда:
Locational code The code for each node is of the same length (zero-padded) Level of the node is also attached

Слайд 5


Octree and Linear Octree
Описание слайда:
Octree and Linear Octree

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Observation When we sort the leaf nodes according to their locational codes (as binary scalars), the order is the same as the preorder traversal of...
Описание слайда:
Observation When we sort the leaf nodes according to their locational codes (as binary scalars), the order is the same as the preorder traversal of the octree In octree, we may use octal number for coding

Слайд 7


Simple and Efficient Traversal Methods for Quadtrees and Octrees Frisken and Perry 2002 (MERL) Usually locational code is for linear octrees (for...
Описание слайда:
Simple and Efficient Traversal Methods for Quadtrees and Octrees Frisken and Perry 2002 (MERL) Usually locational code is for linear octrees (for more compact representation); here it is used in tree-based representations to facilitate a simpler and more efficient query for point location, region location and neighbor finding

Слайд 8


Representation
Описание слайда:
Representation

Слайд 9


Point Location
Описание слайда:
Point Location

Слайд 10


Region Location (1)
Описание слайда:
Region Location (1)

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Region Location (2)
Описание слайда:
Region Location (2)

Слайд 12


Neighbor Search
Описание слайда:
Neighbor Search

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