- Autocad Dynamic Block Parameters C#
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User's Guide > Create and Modify Objects > Create and Use Blocks (Symbols) > Add Dynamic Behavior to Blocks > Use the Block Editor >
Dynamic Block Action vs Dynamic Block Parameters December 30, 2009 by Edwin Prakoso 3 Comments We have created an AutoCAD column block by using two methods: using dynamic block actions and using parametric features (geometric and dimensional constraint).
You can control the geometry of constraint parameters with mathematical expressions.
While you can insert both user variables and user parameters in the Block Editor, only user parameters are displayed as editable custom properties for a block reference.
There are several types of user parameters. For more information, see Parameters Manager - Dynamic Blocks.
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- BLOCKREDEFINEMODE - Controls whether the “Block- Redefine Block” task dialog box is displayed when inserting a block from the Blocks palette with the same name as a block inside the current drawing. BLOCKSTATE (Read only) – Reports whether the Blocks palette is open or closed. More new features in AutoCAD 2020.
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- The Parameters Manager allows you to define parameter groups in the drawing editor. A parameter group is a collection of named parameters. It contains a subset of all parameters defined for the current space, but the group can also be empty.
- Parameters determine the geometry that will be affected by an action when you manipulate a block reference. When you add a parameter to a dynamic block definition, grips are displayed at key points of the parameter. Key points are the parts of a parameter that you use to manipulate the block reference.
NoteUser parameters can be exposed as custom properties of the block reference. If it does not define an equation, then the property can be edited. If it is an equation, then the property is read-only.
See Also
To create user parameters using the Parameters Manager
System Variables
The Block Editor contains a special authoring area in which you can draw and edit geometry as you would in the drawing area.
You use the Block Editor to define the objects and behavior for a block definition. In the Block Editor, you add parameters and actions, which define custom properties and dynamic behavior.
The following commands are used for editing blocks and are available only in the Block Editor:
- BACTION
- BACTIONBAR
- BACTIONSET
- BACTIONTOOL
- BASSOCIATE
- BATTORDER
- BAUTHORPALETTE
- BAUTHORPALETTECLOSE
- BCLOSE
- BCPARAMETER (not in AutoCAD LT)
- BCYCLEORDER
- BCONSTRUCTION
- BGRIPSET
- BLOOKUPTABLE
- BPARAMETER
- BSAVE
- BSAVEAS
- BTABLE
- BTESTBLOCK
- BVHIDE
- BVSHOW
- BVSTATE
When the BLOCKEDITLOCK system variable is set to 1, the Block Editor cannot be opened.
The Block Editor also provides a Block Editor toolbar and Block Authoring palettes that contain tools for creating dynamic blocks. The Block Authoring Palettes window contains the following tabs:
- Parameters tab
- Actions tab
- Parameter Sets tab
- Constraints tab (not in AutoCAD LT
Block Editor Toolbar
Provides tools for working in the Block Editor, creating dynamic blocks, and working with visibility states.
The Block Editor toolbar is displayed when the ribbon is not active. It is also displayed only when you enter the Block Editor with the ribbon closed.
The AutoCAD LT Toolbar
Displays the Edit Block Definition dialog box.
Displays the name of the current block definition.
Specifies the current visibility state displayed in the Block Editor.
Parameters Tab (Block Authoring Palettes Window)
Provides tools for adding parameters to a dynamic block definition in the Block Editor. Parameters specify positions, distances, and angles for geometry in the block reference. When you add a parameter to a dynamic block definition, it defines one or more custom properties for the block.
Adds a point parameter to the dynamic block definition and defines custom X and Y properties for the block reference. A point parameter defines an X and Y location in the drawing. In the Block Editor, a point parameter looks similar to an ordinate dimension.
Adds a linear parameter to the dynamic block definition and defines a custom distance property for the block reference. A linear parameter shows the distance between two anchor points. A linear parameter constrains grip movement along a preset angle. In the Block Editor, a linear parameter looks similar to an aligned dimension.
Adds a polar parameter to the dynamic block definition and defines custom distance and angle properties for the block reference. A polar parameter shows the distance between two anchor points and displays an angle value. You can use both grips and the Properties palette to change both the distance value and the angle. In the Block Editor, a polar parameter looks similar to an aligned dimension.
Adds an XY parameter to the dynamic block definition and defines custom horizontal and vertical distance properties for the block reference. An XY parameter shows the X and Y distances from the base point of the parameter. In the Block Editor, an XY parameter displays as a pair of dimensions (horizontal and vertical). These dimensions share a common base point.
Adds a rotation parameter to the dynamic block definition and defines a custom angle property for the block reference. A rotation parameter defines an angle. In the Block Editor, a rotation parameter displays as a circle.
Adds an alignment parameter to the dynamic block definition. An alignment parameter defines an X and Y location and an angle. An alignment parameter always applies to the entire block and needs no action associated with it. An alignment parameter allows the block reference to automatically rotate around a point to align with other objects in the drawing. An alignment parameter affects the angle property of the block reference. In the Block Editor, an alignment parameter looks like an alignment line.
Adds a flip parameter to the dynamic block definition and defines a custom flip property for the block reference. A flip parameter flips objects. In the Block Editor, a flip parameter displays as a reflection line. Objects can be flipped about this reflection line. A flip parameter displays a value that shows if the block reference has been flipped or not.
Adds a visibility parameter to the dynamic block definition and defines a custom visibility property for the block reference. With visibility parameter, you can create visibility states and control the visibility of objects in the block. A visibility parameter always applies to the entire block and needs no action associated with it. In a drawing, you click the grip to display a list of visibility states available for the block reference. In the Block Editor, a visibility parameter displays as text with an associated grip.
Adds a lookup parameter to the dynamic block definition and defines custom lookup properties for the block reference. A lookup parameter defines a custom property that you can specify or set to evaluate to a value from a list or table you define. It can be associated with a single lookup grip. In the block reference, you click the grip to display a list of available values. In the Block Editor, a lookup parameter displays as text.
Adds a base point parameter to the dynamic block definition. A base point parameter defines a base point for the dynamic block reference relative to the geometry in the block. A base point parameter cannot be associated with any actions, but can belong to an action's selection set. In the Block Editor, a base point parameter displays as a circle with crosshairs
Actions Tab (Block Authoring Palettes Window)
Provides tools for adding actions to a dynamic block definition in the Block Editor. Actions define how the geometry of a dynamic block reference move or change when the custom properties of a block reference are manipulated in a drawing. You associate actions with parameters.
Adds a move action to the dynamic block definition when you associate the action with a point, linear, polar, or XY parameter. A move action is similar to the MOVE command. In a dynamic block reference, a move action causes objects to move a specified distance and angle.
Adds a scale action to the dynamic block definition when you associate the action with a linear, polar, or XY parameter. A scale action is similar to the SCALE command. In a dynamic block reference, a scale action causes its selection set to scale when the associated parameter is edited by moving grips or by using the Properties palette.
Adds a stretch action to the dynamic block definition when you associate the action with a point, linear, polar, or XY parameter. A stretch action causes objects to move and stretch a specified distance in a specified location.
Adds a polar stretch action to the dynamic block definition when you associate the action with a polar parameter. A polar stretch action rotates, moves, and stretches objects a specified angle and distance when the key point on the associated polar parameter is changed through a grip or the Properties palette
Adds a rotate action to the dynamic block definition when you associate the action with a rotation parameter. A rotate action is similar to the ROTATE command. In a dynamic block reference, a rotate action causes its associated objects to rotate when the associated parameter is edited through a grip or the Properties palette.
Adds a flip action to the dynamic block definition when you associate the action with a flip parameter. With a flip action you can flip a dynamic block reference about a specified axis called a reflection line.
Adds an array action to the dynamic block definition when you associate the action with a linear, polar, or XY parameter. An array action causes its associated objects to copy and array in a rectangular pattern when the associated parameter is edited through a grip or the Properties palette.
Adds a lookup action to the dynamic block definition. When you add a lookup action to a dynamic block definition and associate it with a lookup parameter, it creates a lookup table. You can use a lookup table to assign custom properties and values to a dynamic block.
Parameter Sets Tab (Block Authoring Palettes Window)
Provides tools for adding a parameter and at least one action at the same time to a dynamic block definition in the Block Editor. When you add a parameter set to a dynamic block, the actions are automatically associated with the parameter. After you add a parameter set to a dynamic block, you double-click the yellow alert icon (or use the BACTIONSET command) and follow the Command prompts to associate the action with a selection set of geometry.
Automatically adds a move action associated with the point parameter.
Automatically adds a move action associated with the endpoint of the linear parameter.
Automatically adds a stretch action associated with the linear parameter.
Automatically adds an array action associated with the linear parameter.
Automatically adds a two move action, one associated with the base point and one associated with the endpoint of the linear parameter.
Automatically adds two stretch actions, one associated with the base point and one associated with the endpoint of the linear parameter.
Autocad Dynamic Block Parameters C#
Yumi download usb. Automatically adds a move action associated with the polar parameter.
Automatically adds a stretch action associated with the polar parameter.
Automatically adds an array action associated with the polar parameter.
Automatically adds two move actions, one associated with the base point and one associated with the endpoint of the polar parameter.
Automatically adds two stretch actions, one associated with the base point and one associated with the endpoint of the polar parameter.
Automatically adds a move action associated with the endpoint of the XY parameter.
Automatically adds two move actions, one associated with the base point and one associated with the endpoint of the XY parameter.
Automatically adds four move actions, one associated with each key point on the XY parameter.
Automatically adds four stretch actions, one associated with each key point on the XY parameter.
Automatically adds an array action associated with the XY parameter.
Automatically adds a rotation action associated with the rotation parameter.
Automatically adds a flip action associated with the flip parameter.
Adds a visibility parameter to the dynamic block definition and allows visibility states to be defined. No action is necessary with the visibility parameter.
Automatically adds a lookup action associated with the lookup parameter.
Constraints Tab (Block Authoring Palettes Window) - Not available in AutoCAD LT
Provides tools for applying geometric constraints and constraint parameters to objects. When you apply geometric constraint to a pair of objects, the order in which the objects are selected and the point on which each object is selected can affect how the objects are positioned relative to each other.
Geometric Constraints
- Coincident Constraint (GCCOINCIDENT)
- Perpendicular Constraint (GCPERPENDICULAR)
- Parallel Constraint (GCPARALLEL)
- Tangent Constraint (GCTANGENT)
- Horizontal Constraint (GCHORIZONTAL)
- Vertical Constraint (GCVERTICAL)
- Colinear Constraint (GCCOLLINEAR)
- Concentric Constraint (GCCONCENTRIC)
- Smooth Constraint (GCSMOOTH)
- Symmetric Constraint (GCSYMMETRIC)
- Equal Constraint (GCEQUAL)
- Fix Constraint (GCFIX)
Autocad Parameter Manager Not Showing
Constraint Parameters
Constrains the length of a line or the distance between two lines, a point on an object and a line, or two points on different objects.
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Constrains the X distance of a line or between two points on different objects. Valid objects include lines and polyline segments.
Autocad Edit Block Parameters
Constrains the Y distance of a line or between two points on different objects. Valid objects include lines and polyline segments.
Constrains the angle between two lines or polyline segments. It is similar to an angular dimension.
Constrains the radius of a circle, arc, or polyarc segment.
Constrains the diameter of a circle, arc, or polyarc segment.