About-Creating-Associative-Surfaces

About Creating Associative Surfaces

    About Creating Associative Surfaces

    Associative surfaces automatically adjust to changes made to other, related objects.

    When surface associativity is on, surfaces are created with a relationship to the
    surface or profiles that created them.

    Associativity allows you to:

    • Reshape the generating profiles to automatically reshape the surface.
    • Work with a group of surfaces as if they were one object. Just as reshaping one face
      of a solid box adjusts the entire box, reshaping one surface or edge in a group of
      associated surfaces adjusts the entire group.
    • Use geometric constraints on the 2D profiles of a surface.
    • Assign mathematical expressions to derive properties of surfaces, such as height and
      radius. For example, specify that the height of an extruded surface be equal to one
      half the length of another object.

    As you add and edit objects, all objects become related and create a chain of dependency.
    Editing one object can affect all associated objects. It is important to understand
    the chain of associativity because moving or deleting one of the links in the chain
    can break the relationship between all the objects.

    NOTE: To modify the shape of a surface that is generated from a curve or spline, you must
    select and modify the generating curve or spline, not the surface itself. If you modify
    the surface itself, you will lose associativity.

    When associativity is on, the DELOBJ system variable is ignored. If Surface Associativity
    and NURBS Creation are both on, surfaces are created as NURBS surfaces, not associative
    surfaces.

    Save time by planning your model ahead; you cannot go back and add associativity after
    the model has been created. Also, be careful not to accidentally break associativity
    by dragging objects away from the group.

    Learning AutoCad

    >Associative surfaces automatically adjust to changes made to other, related objects. When surface associativity is on, surfaces are created with a relationship to …surfaces will be created, depending on the number of elements. If there are four elements, one surface will be …to create the body of our wagon.…In doing so, we're also going to look at the associative property of a surface.…Since we're going to  …2 Apr 2010About Creating Associative Surfaces To Work With Setting Associativity for Surfaces Surface Types That Accept Mathematical Expressions Reference To Create …to create surface models is to extrude, revolve, sweep, or loft profiles. This chapter … setting determines whether an associative surface is created. The default …