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Geometry Repair
Manage CAD, FE, and 2D parametric sketch geometry.
Geometry
Create, edit, and cleanup geometry.
Create Geometry
Explore the tools used to create geometry.
Lines
A line represents a curve in space and is not attached to any surface or solid. A line is a one-dimensional geometric entity.
Extend Lines
Use the Extend Lines tool to make an existing line longer, following the general vector and/or curvature of the input line. You can specify the distance as a numeric value, or extend the line to a specified node, line, surface, or point.

Welcome
What's New
View new features for HyperMesh CFD 2025.1.
Get Started
Learn the basics and discover the workspace.
Onboarding Resources
Discover HyperMesh CFD functionality with interactive tutorials and community resources.
Solution Layers
Solution-centric workflows allow you to traverse through modeling environments using a dedicated UI layer.
Manage Files and Data
Create, open, import, and save models.
Convert
Use the Convert tool to convert entire models between data types.
Geometry Repair
Manage CAD, FE, and 2D parametric sketch geometry.
- Sketching
  Create and edit 2D parametric sketch geometry.
- Geometry
  Create, edit, and cleanup geometry.
  - Repair Geometry
    Review geometric errors in the model's surfaces and solids and fix any defects.
  - Create Geometry
    Explore the tools used to create geometry.
    - Points and Nodes
      Learn about creating, editing, and extracting points and nodes.
    - Lines
      A line represents a curve in space and is not attached to any surface or solid. A line is a one-dimensional geometric entity.
      - Create and Edit Lines
        Use the Create Lines tool to draw free lines for geometry construction and to generate meaningful snap locations to be used by other tools.
      - Create and Edit Polylines
        Use the Create Polylines tool to draw polylines for geometry construction and to generate meaningful snap locations to be used by other tools.
      - Combine Lines
        Use the Combine Lines tool to create a new continuous line segment between two existing lines, resulting in a single seamless line.
      - Extend Lines
        Use the Extend Lines tool to make an existing line longer, following the general vector and/or curvature of the input line. You can specify the distance as a numeric value, or extend the line to a specified node, line, surface, or point.
    - Midlines
      Use the Midlines tool to create midlines from existing lines, surface edges, or tube solids.
    - Shapes
      Create and edit circles and rectangles with the Shapes tool.
    - Surfaces
      A surface represents the geometry associated with a physical part. A surface is a two-dimensional geometric entity that may be used in automatic mesh generation.
    - Solids
      Solids are closed volume of surfaces that can take any shape. Solids are three-dimensional entities that can be used in automatic tetra and solid meshing.
    - Create Revolve Regions
      Use the Revolve tool to create axisymmetric revolved regions around select solid bodies. This is useful for creating regions around rotating bodies like fans, impellers, wheels, and so on.
    - Extract Midsurfaces
      Use the Midsurfaces tool to extract the midsurface of sheet metal stampings, molded plastic parts with ribs, and other parts that have thickness clearly smaller than width and length.
    - Extrude Geometry
      Extrude surfaces, nodes, or lines along their normal direction, a vector, or another line.
    - Create Ruled Surfaces and Solids
      Use the Ruled tools to create surfaces/solids by interpolating lines and surfaces either linearly or smoothly.
  - Edit Geometry
    Explore the tools used to edit geometry.
  - Geometry Cleanup
    Clean up problematic areas on geometry.
  - Simplify Region
    Use the Simplify Region tool to create simple shapes around selected geometry.
- Discrete Geometry
  Work with discrete geometry like FE Geometry and floating elements.
- Model Build and Assembly
  Create, organize and manage parts and subsystems.
Meshing
Generate surface/volume mesh by defining mesh controls, or interactively create and edit 2D surface mesh.
Setup
Prepare your model and run the simulation.
Post-Processing
Post-process the simulation results by creating visualizations and measurements.
Design Exploration
Once the baseline model is prepared, you can define morph volumes, morph geometry, create design shapes and run DOE studies. These tool work for both AcuSolve and ultraFluidX-based workflows.
Automation
Automate simulation processes with templates and utility scripts.
Solver Help
More resources for AcuSolve and ultraFluidX solvers.

View All Altair HyperWorks Help

Extend Lines

Use the Extend Lines tool to make an existing line longer, following the general vector and/or curvature of the input line. You can specify the distance as a numeric value, or extend the line to a specified node, line, surface, or point.

From the Geometry ribbon, click the arrow next to the Create tool set, then select Combine Lines.

Figure 1.
Select Extend from the guide bar drop-down.
Select lines to extend.
Extend in the following ways:
- Drag the manipulator or enter a distance in the microdialog.
  If the Follow curvature option is selected, the extended line follows the input line curvature. If left unchecked, a straight-line extension is created.
- Activate the Choose target checkbox to extend the line to a target point, node, line, or surface.
  
  Figure 2.
  
  Specify the range that the extended line must fall within to connect to the target geometry using capture radius microdialog. If the end of the extended line is within the capture radius of the target geometry, then the coordinates are mapped to the target geometry.
On the guide bar, complete one of the following:
- Click to apply and stay in the tool.
- Click to apply and close the tool.
- Click to exit the tool without applying.