Differentiate Between Ucs And Wcs In Autocad

5/10/2019by admin

Normally, the program assumes all coordinates to be relative to the current UCS. The following functions convert points between UCS and WCS.

Understand the World Coordinate System (WCS) All objects in a drawing are defined by their coordinates in the World Coordinate System (WCS), which cannot be moved or rotated. The WCS and the UCS are initially coincident in new drawings. It isn’t easy if you stay in the WCS, but AutoCAD lets you set a new UCS based on that sloping surface. After the UCS is made current, you draw in it just as you draw in the WCS. Although originally intended for 3D work, a UCS can be useful on either two dimensions or three. Re: What is the difference between World UCS and Top UCS It's easy enough to temporarily move the UCS anywhere I'd like it to be, but the Top UCS resets to a point different from the World UCS every time I set the view back to Top.

w2u(p1)
Autocad ucs vs wcs

Converts point p1 expressed in the WCS to the current UCS.

u2w(p1)

Converts point p1 expressed in the current UCS to the WCS.

You can use w2u to find the WCS origin in terms of the current UCS:

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w2u([0,0,0])

Filtering the X, Y, and Z Components of a Point or Vector

The following functions filter the X, Y, and Z components of a point or vector.

Point-filter functions

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Function

Description

xyof(p1)

X and Y components of a point; Z component is set to 0.0

xzof(p1)

X and Z components of a point; Y component is set to 0.0

yzof(p1)

Y and Z components of a point; X component is set to 0.0

xof(p1)

X component of a point; Y and Z components are set to 0.0

yof(p1)

Y component of a point; X and Z components are set to 0.0

zof(p1)

Z component of a point; X and Y components are set to 0.0

rxof(p1)

X component of a point

ryof(p1)

Y component of a point

rzof(p1)

Z component of a point

The following example provides the Z component of a point expressed in spherical coordinates:

zof([2<45<45])

And

The following example provides a point whose X and Y coordinate values are taken from point a and the Z coordinate value from point b:

xyof(a)+zof(b)

Autocad Ucs Vs Wcs

Related Concepts

Difference Between Ucs And Wcs In Autocad

Related Reference