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geometry

  

HorizontalName

  

find the name of the horizontal axis used to define an object

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

HorizontalName(obj)

Parameters

obj

-

line, triangle, circle, parabola, ellipse, or hyperbola

Description

• 

The routine returns the name of the horizontal axis used to define obj. It returns either a name or FAIL.

• 

The environment variables _EnvHorizontalName and _EnvVerticalName can be assigned names that are used as the names of the horizontal and vertical axes, respectively.

• 

The command with(geometry,HorizontalName) allows the use of the abbreviated form of this command.

Examples

withgeometry:

pointA,0,0,pointB,1,1:

linel,A,B

l

(1)

detaill

assume that the names of the horizontal and vertical axes are _x and _y, respectively

name of the objectlform of the objectline2dequation of the line_x+_y=0

(2)

HorizontalNamel

FAIL

(3)

The horizontal and vertical axes do not have names. Assign names to the axes.

_EnvHorizontalNamea:_EnvVerticalNameb:

Equationl

a+b=0

(4)

Request the name of the horizontal axis again.

HorizontalNamel

a

(5)

detaill

name of the objectlform of the objectline2dequation of the linea+b=0

(6)

See Also

geometry[VerticalName]

 


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