Framework:Model Analysis

Model Analysis determines a model object's characteristics. The model analysis capabilities of ACIS include: ACIS Checker which tests the validity of a model; Object Relationships such as boxing, clashing, clearance and distance; Physical properties analysis which includes calculations of length, area, mass and moments of inertia; Ray Testing and Cellular Topology.

Topic	Description
ACIS Checker	Functionality to help detect bad or invalid data in models.
Cellular Topology	Modeling of subregions in a solid or sheet.
Intersectors	This component determines intersections between geometric elements by finding the points or intervals at which curves and surfaces meet.
Laws	Functionality provides symbolic representations of equations that are parsed in a similar way to equations. Laws provide the ability to solve complex, global mathematical problems.
Object Relationships	Determine the spatial relationships between two objects, such as: minimum distances, clearance, clashing, and containment.
Physical Properties	Determine properties of an entity such as: area, volume, center of gravity, and length.
Point Cloud	ACIS Point Clouds provide the capability to manipulate and visualize large sets of points.
Ray Testing	Ray testing provides functionality to "fire" a ray with a specified initial position, direction, and radius to determine, for instance, the positional relationships among objects.

• ... check an entity for invalid or bad data
• ... find an extreme position of an entity in a specified direction

Some of the ACIS R21 improvements are:

• Object Relationships
  • New "unsigned" distance mode added to api_entity_point_distance – This is provided via SPAentity_point_distance_options.