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Author Topic: Ask: converts point p1 expressed in the current UCS to the WCS and vice versa  (Read 2154 times)

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RAYAKMAL

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Ask: converts point p1 expressed in the current UCS to the WCS and vice versa
« on: September 23, 2011, 06:47:58 PM »
I have no idea how to do these: converts point pt1 expressed in the current UCS to the WCS and WCS to UCS with Autolisp.
Tried with (trans pt1 0 1) and (trans pt1 1 0) don't work as expected with nested objects.
« Last Edit: September 23, 2011, 07:06:31 PM by RAYAKMAL »
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CAB

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Re: Ask: converts point p1 expressed in the current UCS to the WCS and vice versa
« Reply #1 on: September 23, 2011, 07:48:16 PM »
They should work.
Please post some more of your code.
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Lee Mac

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Re: Ask: converts point p1 expressed in the current UCS to the WCS and vice versa
« Reply #2 on: September 23, 2011, 08:21:10 PM »
Quote from: RAYAKMAL on September 23, 2011, 06:47:58 PM
I have no idea how to do these: converts point pt1 expressed in the current UCS to the WCS and WCS to UCS with Autolisp.
Tried with (trans pt1 0 1) and (trans pt1 1 0) don't work as expected with nested objects.

Nested objects will have coordinates expressed relative to the block definition in which they are nested. To transform these coordiates you will need to either use the transformation matrix returned by the nentsel function following a selection of a nested object, or construct a transformation matrix based on the normal, rotation and scale of the Insert in which the object is nested.
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CAB

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Re: Ask: converts point p1 expressed in the current UCS to the WCS and vice versa
« Reply #3 on: September 23, 2011, 10:13:50 PM »
Good catch Lee.  8-)
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Lee Mac

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Re: Ask: converts point p1 expressed in the current UCS to the WCS and vice versa
« Reply #4 on: September 24, 2011, 05:54:28 AM »
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RAYAKMAL

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Re: Ask: converts point p1 expressed in the current UCS to the WCS and vice versa
« Reply #5 on: September 26, 2011, 08:10:05 AM »
Ok..I understand now...Thx for your elaboration guys :)
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