McGlone -19 
DIGITAI. MAPPING l.ABORATORY 
Object Modeling 
Deformable models based on 
superquadrics 
Fit superquadrics to object to get overall shape. 
Represent smaller deviations from overall shape 
using a deformable nodal model. 
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DIGITAL MAPPING LABORATORY 
13 
Object Modeling 
DIGITAL MAPPING LABORAIORY 
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MAPSlab site model format 
Boundary representation: 
• Points. 
• Edges—chains of points 
• Surfaces—chains of edges. 
• Models—set of linked surfaces. 
Specify geometric constraints to define 
geometry. 
Top level “parametric” objects defined in terms 
of standard topology: 
• flat-roof building 
• peaked-roof building 
• rectilinear building 
DIGITAL MAPPING LABORATORY 
14 
Object Modeling