Portal:ACIS

From DocR23

Revision as of 21:44, 19 August 2010 by Admin03 (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

· 3D ACIS Modeler · 3D InterOp · Extensions · RADF · Suites ·

3D ACIS Modeler

The 3D ACIS Modeler (ACIS) is an object-oriented three-dimensional (3D) geometric/solid modeling engine from Spatial Corp. It is designed for use as the geometry foundation within virtually any end-user 3D modeling application. Written in C++, ACIS provides an open architecture framework for wireframe, surface, and solid modeling from a common, unified data structure.

Technical Article Search

C++ Library Reference Search

edit

What's New

R23 SP2

Release Notes

edit

Topics in ACIS

ACIS Topics

ACIS Products

ACIS Extensions

edit

ACIS Indexes

All Technical Articles Tutorials Getting Started Guide Frequently Asked Questions Anticipated Deprecations Interface Change History	Scheme Extensions Scheme to API Map R4RS Online Help (native Scheme) Elk Online Help (native Scheme) Global Options Error Messages

ACIS Library Reference Material
C++ Classes Global Functions Global Variables	Typedefs Enumerations Defines

edit

ACIS Frameworks

Start

System

Blending

Local Operations

Model Analysis

Model Visualization and Display

Modeling Operations

Surfacing

ACIS Frameworks - Welcome!

These frameworks provide information and terminology about the different components and concepts used in ACIS.

edit

Local Operations Framework

The ACIS Local Operations Framework comprises five components which facilitate the modification of ACIS bodies. The term Local Operations implies a change to modeling geometry in a localized fashion; specifically the modification of a surface definition under a topological face. This concept has been expanded to encompass body offset, shelling, move, tapering and sheet extend. In this context, a great deal of topological changes are possible and handled by their respective operators. In addition, this framework includes the components for face and wire edge removal, as well as repairing body self-intersections.

edit

Local Operations Components

Component	Description
Local Operations	The Local Operations Component (LOP) is the base component of the framework. The core algorithm, TWEAK, replaces the surface definition of a face and is the main work horse for all the operations in this framework. TWEAK can be called standalone via `api_tweak_faces`. In addition, this component includes body offsetting, move, tapering, and sheet extend functionality...
Offsetting	The Offsetting Component (OFST) supplies functionality to offset edges on faces, wire bodies, and standalone ACIS faces ...
Remove	The Remove Component (REM), supports the removal of faces from bodies and heals the resulting body with the remaining faces. In addition, the component supports the removal of edges from a wire body and healing the gap by edge extension ...
Shelling	The Shelling Component (SHL) creates thin-walled solids by offsetting all faces of a solid model by a specified distance ...
Repair Body Intersections	The Repair Body Intersections Component (RBI), repairs body self-intersections that arise from performing a modeling operation. RBI is used by Local Operations, Shelling, and other components like Sweeping and Blending ...

More ACIS Components...

edit

What Can You Do?

... offset wire bodies with different gap types or ACIS laws

... offset or shell bodies that contain surfaces with poor curvature or geometric or parametric singularities

edit

What's New in Local Operations?

ACIS R23 reports additional types of complexities:

New Complexities

More on What's New ...

edit

Surfacing Framework

The ACIS Surfacing framework comprises components which facilitate the construction of surfaces and topology built primarily from 3D curves. In all cases, the construction techniques build the required surfaces and topology for a proper closed or open solid body. The surfaces in this framework are generally ACIS procedural surfaces except when analytic representations are possible.

edit

Components

Components	Description
Skinning	This component (`SKIN`) provides techniques for creating surfaces and faces by interpolating a sequence of edges, coedges, or wires, arbitrarily positioned in model space. It is subdivided into: Skinning — A modeling technique that fits a surface through a series of disjoint curves (wire bodies), creating a sheet body or a solid body. Lofting — A modeling technique that starts with a surface and fits another surface through a coedge of the original surface and a series of curves (coedges). Net Surfaces — A surfacing technique that uses a network of curves defining both the u and v surface parameter directions (often called "bi-directional" curves because of this), unlike skinning and lofting which only take curves defining the u parameter.
Sweeping	This component (`SWP`) is used to create solid or sheet bodies by sweeping a profile along a path.
Covering	This component (`COVR`) is used to fit a surface over the boundary defined with a closed and connected circuit of curves. It generates a sheet or solid body from a set of closed wires or closed circuits in sheet or solid bodies.
ACIS Deformable Modeling	This component (`ADM`) is used to create or manipulate freeform curves and surfaces. Advanced Covering is a high-level interface to ADM that is used to cover (that is, fit a surface onto) closed circuits in solid, sheet, or wire bodies.

More ACIS Components...

edit

What Can You Do?

edit

What's new in Surfacing?

New Skinning functionality for R23 includes:

Fast Extrusion of Planar Faces

edit

Examples

... ruled skinning and helical sweeping

... branched skinning and space warping

More Examples ...

edit

Components

ACIS 3D Components...

More Components ...

Topic	Description
ACIS API Functions	Application Procedural Interface (API) functions provide the main interface between applications and ACIS.
ACIS Classes	A set of C++ classes that are used to define the ACIS model geometry, topology, and other characteristics.
ACIS Options	Options are global variables that may be used to modify the behavior of ACIS.
ACIS Glossary	An overview of the different ACIS concepts.
Scheme Reference Guide	Details about the Scheme Interpreter, basic Scheme Extensions, and interfaces which are used by the Scheme ACIS Interface Driver Extension (Scheme AIDE) demonstration application.

Topic	Related Articles	FAQs	C++ Classes
Geometry			C
Curves			C
Surfaces			C
Parameter Space Curves			C
Geometric Entities			C
Laws			C

Topic	Related Articles	FAQs	C++ Classes
BODY			C
LUMP			C
SHELL			C
WIRE			C
FACE			C
LOOP			C
EDGE			C
COEDGE			C
VERTEX			C

Component	Description
Base	The Base component (BASE) contains system-related functionality for multiple products, including: Memory Management Error Handling Multi-Threading and Thread Safety Global Options Math Classes and Functions
Kernel	The Kernel component (KERN) contains system-related functionality for the ACIS product, including: Entities Attributes Copying Models Deleting Models Saving and Restoring Models History and Roll Versioning Journaling Annotations

Topic	Description
Key Aspects of C++	Describes how C++ is used by ACIS.
ACIS Architecture	Provides an overview of the program structure of ACIS.
Initialization and Termination	Recommendations for when and how to initialize/terminate ACIS.
Lists	Variable length lists to maintain sets of objects.
Minimizing Memory	Techniques to reduce ACIS' memory usage (sometimes at the cost of performance).
Optimizing Performance	Techniques to streamline ACIS' performance (sometimes at the cost of consuming more memory).

Component	Description
Blending	The Blending component (BLND) allows the creation of blends and chamfers on sharp edges of a model. Standard Blending allows the creation of Constant Radius Blends Variable Radius Blends Chamfers
Advanced Blending	The Advanced Blending component (ABL) allows the creation of more complex blends and chamfers than the standard ACIS Blending component. Advanced Blending allows the creation of Entity-Entity Blends Three Entity Blends Curvature Continuous Blends Advanced Chamfers Holdline Blends Variable Radius Blends With Advanced Features

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.
Feature Detection	Detection of protrusion and depression features as well as blends.

Component	Description
HOOPS/ACIS Bridge	The HOOPS/ACIS Bridge encapsulates the work needed to connect ACIS modeler from Spatial to the HOOPS/3dGS. The bridge provides an API for controlling the manner in which ACIS' geometric tessellation is mapped to HOOPS primitives ...
Faceting	The Faceter Component (FCT) generates and controls approximate polygonal representations. The polygon approximations are used in all active and static rendering, in clearance analysis, and in operations where approximations are acceptable to simplify calculations ...
Interactive Hidden Line	The Interactive Hidden Line Component (IHL), creates views of ACIS model objects with hidden lines removed based on tessellated data ...
PHL V5	The Precise Hidden Line Removal V5 Component (PHL V5), calculates hidden line data (based in actual modeling data) and draws hidden line representations of the model ...

Component	Description
Booleans	This component performs Boolean operations on the model topology of bodies, first finding the intersections between bodies, and then deciding which pieces to group together and which to discard.
Constructors	This component allows the creation of models.
Healing	This component contains API functions that can be used to fix models imported from other modeling systems into ACIS in order to make them usable in ACIS.
Stitching	This component provides a way to stitch, or sew, separate faces together to make a sheet or solid body that is topologically complete.
Space Warping	This component uses ACIS law functionality to warp entities and parts.

Portal:ACIS

From DocR23

3D ACIS Modeler

What's New

Topics in ACIS

ACIS Topics

ACIS Products

ACIS Extensions

ACIS Indexes

ACIS Frameworks

ACIS Frameworks

ACIS Frameworks - Welcome!

System Framework

System Components

System Topics

What's New?

Blending Framework

Blending Components

What Can You Do?

What's New?

Local Operations Framework

Local Operations Components

What Can You Do?

What's New in Local Operations?

Model Analysis Framework

Model Analysis Functionality

What Can You Do?

What's New?

Model Visualization and Display Framework

Components

What Can You Do?

What's New in Model Visualization and Display?

Modeling Operations Framework

Components

What Can You Do?

What's New?

Surfacing Framework

Components

What Can You Do?

What's new in Surfacing?

Examples

Components

Views

Personal tools

Search

Navigation

products

Live

release notes

FAQs

spatial sites

Toolbox