Change Block Base Point

sachindkini

Program Description

This program allows the user to change the base point for all block references of a block definition in a drawing.

The program offers two commands:

CBP: Change Base Point

This command will retain the insertion point coordinates for all references of the selected block. Hence visually, the block components will be moved around the insertion point when the base point is changed.

CBPR: Change Base Point retain Reference position

This command will retain the position of the each block reference of the selected block. Hence, each block reference will be moved to retain the visual position when the base point is changed.

Upon issuing one of the above commands at the AutoCAD command-line, the program will prompt the user to select a block for which to change the base point.

Following a valid selection, the user is then prompted to specify a new base point relative to the selected block.

The block definition (and block reference depending on the command used) will then be modified to reflect the new block base point.

If the selected block is attributed, an ATTSYNC operation will also be performed to ensure all attributes are in the correct positions relative to the new base point.

Finally, the active viewport is regenerated to reflect the changes throughout all references of the block.

The program will furthermore perform successfully with rotated & scaled block references, constructed in any UCS plane.

Please Note: A REGEN is required if the UNDO command is used to undo the operations performed by this program.

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文件名称:ChangeBlockBasePointV1-4.lsp 
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Demonstration

Lispboy

谢谢提供思路。

sicky111

太棒了，给力。

st788796

可以用矩阵，也可以用矢量的概念move

xvjiex

想法不错！