topic Re: in ObjectARX Forum

Coordinate systems problem

Anonymous — Mon, 17 Feb 2003 07:36:52 GMT

Hi guies,
I have a problem with coordinate systems. Here it is:
If you have a Block A and it contains a block B in it then how to convert the position of block B into the UCS that I am draing into. I have the position of block B in the coordinate system of the block A and the position of block A into the current UCS but I need it into the coordinate system I insert block A.
It is not difficult to do it with mathematics but I need it with the ObjectARX :-))))).

Re: Coordinate systems problem

Anonymous — Mon, 17 Feb 2003 15:20:51 GMT

I think you must look at this

acdbUcs2Wcs(firstPoint, firstPoint,
false);
acdbWcs2Ucs(lastPoint, lastPoint, false);

and also at this

acdbWcs2Ecs(p1, p1, dNorm, false);

Bernd

PS: you can also read the UCS/ECS from an object

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

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Hi
guies,
I have a problem with coordinate systems. Here it is:
If you
have a Block A and it contains a block B in it then how to convert the
position of block B into the UCS that I am draing into. I have the position of
block B in the coordinate system of the block A and the position of block A
into the current UCS but I need it into the coordinate system I insert block
A.
It is not difficult to do it with mathematics but I need it with the
ObjectARX :-))))).

Re:

Anonymous — Tue, 18 Feb 2003 01:46:25 GMT

Thanks I have already tried it but I have 3 coordinate systems A, B and C. A is implemented in B and B is implemented in C. So I think that these functions you recommend are making transormation of the points only in the Coordinate System-Container.
I think I'll make up with a little bit more mathematics
:-))))))).

Thanks anyway.

Re:

Anonymous — Tue, 18 Feb 2003 06:22:36 GMT

I found the decision. Transformation matrixes.