Libpc

This page contains the design document for an enhancement or feature. The design should be considered a work in progress and may not represent the final design. As this is a collaborative design, contributions and participation from other developers and users is encouraged. Use the discussion page for providing comments and suggestions.

Contents 1 libpc: Introduction 2 Objectives 2.1 Advantages 3 Constraint Satisfaction Process 4 Possible Approaches in BRL-CAD 5 Structure 5.1 Overall Hierarchy 5.2 Libpc Hierarchy 5.3 Object Hierarchy 6 Use-case Scenarios

[edit] libpc: Introduction

[edit] Objectives

The objectives encompassed by libpc are the following

• Front-end

1. An Abstraction of Parameters over the present components of primitives
2. Representation of complex (see examples) constraints between Parameters
3. Framework for selection of Design/Alternative Configurations

• Back-end

1. Fast Geometric Constraint Solution

[edit] Advantages

1. Reduction of Modeling time in case of Iterative designs
2. Logic of Design represented in the geometry file itself
3. Capability for complex geometry generation

[edit] Constraint Satisfaction Process

[edit] Possible Approaches in BRL-CAD

[edit] Structure

libpc is composed of the following modules

1. Reprsentation of Parameters and Constraints in Storage
2. Representation of Parameters in Memory
3. Representation of Constraints in Memory / DataStructure
   1. Associated MathGrammar and MathVM
4. Generation of 2 and 3 from 1
5. Solution System
   1. Constraint Network Generation from 4
   2. Constraint Satisfaction
6. Parameter and Geometry updation

[edit] Overall Hierarchy

[edit] Libpc Hierarchy

[edit] Object Hierarchy

[edit] Use-case Scenarios

"It is proper to take alarm at the first experiment on our liberties." - James Madison

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