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BLOB BODY TYPE
BASIC IDEA
When mesh
body type is set
to 'blob',
extension treats
nodal points as a
spherical data
set.
Extension
estimates
position of an
average point
from given nodal
points and
places center of
a spherical data
set at it.
...
During
interpolation
length of radius
vectors to
unknown points
are calculated
according to
selected
interpolation
algorit...
Inverse Distance Weighting
IDW ALGORITHM
IDW ALGORITHM
Inverse Angle
Weighting
(IAW) would be
a more accurate
name because
algorithm
actually uses
angle to
measure...
'Average' and 'minimize' algorithms
ITERATIVE ALGORITHMS
First stage is a
preliminary
calculation,
which sets the
same length to a
radius vector to
a point being
calculated as a
l...
The second
stage is an
iterative
smoothing itself:
points within a
cell size angle
from known
points stay
where they are,
...
So the process is
similar to the
one that takes
place during
conventional
'terrain-like'
mesh
processing. It is
just adapt...
TREND AND PREDICT
Mapped surface
Adaptation of
these
algorithms for
spherical
coordinate
system is a bit
more tricky.
Extension maps
given points to
Cartes...
TREND AND PREDICT
...then processes
mapped set as
usual.
IDW VS PREDICT
Radius vector
to each given
nodal point is
normal to a
surface tangent
plane at this
point, when
algorithm ...
IDW VS PREDICT
The idea of
'predict'
algorithm is to
estimate surface
tangent planes
at given nodal
points.
'Predict'
IDW VS PREDICT
Known
points are
not necessarily
local extrema in
case when
'predict'
algorithm is
chosen so result
of inte...
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Blob Body Type Explanations

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Learn more about new mesh body type introduced in version 1.3 of LSS Arch extension for SketchUp.

Published in: Science
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Blob Body Type Explanations

  1. 1. BLOB BODY TYPE
  2. 2. BASIC IDEA When mesh body type is set to 'blob', extension treats nodal points as a spherical data set.
  3. 3. Extension estimates position of an average point from given nodal points and places center of a spherical data set at it. BASIC IDEA
  4. 4. During interpolation length of radius vectors to unknown points are calculated according to selected interpolation algorithm. BASIC IDEA
  5. 5. Inverse Distance Weighting IDW ALGORITHM
  6. 6. IDW ALGORITHM Inverse Angle Weighting (IAW) would be a more accurate name because algorithm actually uses angle to measure 'amount of proximity'
  7. 7. 'Average' and 'minimize' algorithms ITERATIVE ALGORITHMS
  8. 8. First stage is a preliminary calculation, which sets the same length to a radius vector to a point being calculated as a length of a vector to a closest* known nodal point. ITERATIVE ALGORITHMS * - «closest» in terms of spherical coordinate system here
  9. 9. The second stage is an iterative smoothing itself: points within a cell size angle from known points stay where they are, others gradually move along their radius vectors. ITERATIVE ALGORITHMS
  10. 10. So the process is similar to the one that takes place during conventional 'terrain-like' mesh processing. It is just adapted a bit for spherical coordinate system. ITERATIVE ALGORITHMS
  11. 11. TREND AND PREDICT Mapped surface
  12. 12. Adaptation of these algorithms for spherical coordinate system is a bit more tricky. Extension maps given points to Cartesian coordinate system at first... TREND AND PREDICT
  13. 13. TREND AND PREDICT ...then processes mapped set as usual.
  14. 14. IDW VS PREDICT Radius vector to each given nodal point is normal to a surface tangent plane at this point, when algorithm is set to IDW. So known points are local extrema. IDW
  15. 15. IDW VS PREDICT The idea of 'predict' algorithm is to estimate surface tangent planes at given nodal points. 'Predict'
  16. 16. IDW VS PREDICT Known points are not necessarily local extrema in case when 'predict' algorithm is chosen so result of interpolation can be more convincing.

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