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geom3d

  

point

  

define a point

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

point(P, Px, Py, Pz)

point(P, [Px, Py, Pz])

Parameters

P

-

the name of the point

Px

-

the x-coordinate

Py

-

the y-coordinate

Pz

-

the z-coordinate

Description

• 

A point is represented as a dot. It has position only, and has no length, width, or thickness.

• 

A point P is represented by its ``x'', ``y'', and ``z'' coordinates.

• 

To access the information relating to a point P, use the following function calls:

form(P)

returns the form of the geometric

 

object (i.e., point3d if P is a point).

coordinates(P)

returns [Px,Py,Pz].

xcoord(P)

returns Px which is the x-coordinate

 

of P.

ycoord(P)

returns Py which is the y-coordinate

 

of P.

zcoord(P)

returns Pz which is the z-coordinate

 

of P.

detail(P)

returns a detailed expression of the

 

point P.

• 

The command with(geom3d,point) allows the use of the abbreviated form of this command.

Examples

withgeom3d:

pointA,a,b,c

A

(1)

formA

point3d

(2)

coordinatesA

a,b,c

(3)

xcoordA,ycoordA,zcoordA

a,b,c

(4)

detailA

name of the objectAform of the objectpoint3dcoordinates of the pointa,b,c

(5)

See Also

geom3d[AreCollinear]

geom3d[AreConjugate]

geom3d[AreCoplanar]

geom3d[midpoint]

geom3d[OnSegment]

geom3d[randpoint]

geom3d[transformation]

geom3d[vertices]

 


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