Building Vectorization
Tools
Arttu Soininen
Building Vectorization
Tools
Arttu Soininen
Plane list
• Direction group letter
• Boundary color
• Slope angle
• Number of points matching plane
• Average mismatch (mm) from point to raw plane
• Average mismatch (mm) from point to adjusted
plane
Plane direction
• Each plane has a base direction
– direction group has a common base direction
• Base direction affects:
– surface equation -- aligns normal vector
– boundary lines -- aligned if
rectangle/rectangular
• Direction vector is computed:
– from normal vector for sloped planes -- accurate
– from point cloud for flat planes -- less accurate
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Identifying a plane
• Mouse click identifies a plane:
– inside which the mouse is
– closest to the viewer if multiple
• Use tentative on boundary
element to identify a plane behind
another
• Tools which accept 1-n planes:
– click inside a plane to add
– reset to reject the last one
– click outside all planes to complete
Aerial fill
• Before applying model
– no gaps between planes
– lower planes may extend inside higher
planes
Need to fix
Workflow order
• Reach correct number of planes
• Fix base directions
• Assign symmetry
• Set boundary types
Modify boundary shapes
Auto Align boundaries
• Apply model
Find Detail Planes
• Searches for additional planes
among points
• More eager to accept small planes
• Use if you see small, undetected
parts
Add Building Plane
• Add building plane by:
– placing boundary manually
– using a selected existing element
• Equation can come from:
– free points inside boundary
– boundary
• Use when:
– application has not found correct planes
– alternative vectorization methods have
been used methods
Mirror Building Plane
• Create new plane as mirror image of
another
• Use when missing plane lacks points
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Merge Building Planes
• Merge two planes into one
– check first that equations are close
• Use when you want to:
– simplify by combining two
neighbouring planes
– merge two disjoint parts
Delete Building Plane
• Delete a building planes
• Laser points become ‘Free points’
Create Direction Group
• Assign 1-n planes to a new
direction group
• Base direction can be:
– line given by two points
– base direction of first plane
– average of assigned planes
Add Plane To Group
• Add plane(s) to an existing
direction group
• First mouse click identifies group
• Consecutive clicks identify planes
to add
Assign Plane Block
• Assign joint geometry to 1 - 4 planes
• Not implemented yet
Assign Plane Symmetry
• Assign symmetry between 2-n planes
• Angle
– planes have the same slope angle
– useful if plane has a small number of hits
• Equation
– planes have the same equation
– useful with small planes which have a
weak plane equation on their own
Adjust Building Plane
• Adjust a plane equation to match
one, two or three given points
• Not implemented yet
Set Boundary Type
• Set boundary type of a plane
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Rectangle has four 90 degree corners
–
Rectangular has 4-n corners, all 90 degrees
–
Polygon is a free shape
Rectangle
Rectangular
Polygon
Auto Align Boundaries
• Automatically aligns boundary lines
with
– intersection lines
– each other
– best line position from images (not
implemented)
Align Boundary Segment
• Align one boundary segment to another
• Needed when building has multiple
base directions
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Place Boundary Shape
• Place boundary of a plane manually
• Use when too much editing in
automatic boundary
• Rectangle/rectangular type:
– segment directions constrained by base
direction
• Polygon type:
– Option to align segments close to base
direction
Modify Boundary Shape
• Move a vertex or a segment
• Rectangular boundaries stay rectangular
– linear vertices removed at the end
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Cut Boundary Corner
• Cut a piece off from a corner
• Add a piece to a corner
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Cut Boundary Segment
• Cut a piece off from a segment
• Add a piece to a segment
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Delete Boundary Vertex
• Removes a vertex from a boundary
• Mainly for polygon type boundaries
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