Parabola

There are several EDAs which access the geometric properties of a parabola. Some of the EDAs are READ/WRITE, which means that the properties can be accessed and edited. READ ONLY EDAs can be accessed to extract the geometric properties only.

The focal length represents the distance from the vertex to the focal point as measured along the parabola axis. This value is defined by the formula for a parabola which controls its shape.

The tilt angle represents the angle of rotation of the parabola axis as measured counterclockwise from the positive XC axis of the work coordinate system.

The minimum and maximum Y distance represents the distance from the parabola axis to the ends of the curve. The distance is measured normal to the axis. The minimum and maximum distance may be equal.

The X, Y, and Z axis matrix values represent axes of the coordinate system of the parabola. The parabola lies in the X-Y plane.

Geometric Property

EDA Symbol

Access Type

Data Type

Vertex (X,Y,Z)

&VERTEX(obj)

R/W

Num. Array

Focal length

&FOCAL(obj)

R/W

Number

Tilt angle

&TANG(obj)

R/W

Number

Minimum Y dist.

&YMIN(obj)

R/W

Number

Maximum Y dist.

&YMAX(obj)

R/W

Number

Start point (X,Y,Z)

&SPOINT(obj)

R/O

Num. Array

End point (X,Y,Z)

&EPOINT(obj)

R/O

Num. Array

X axis matrix values

&XAXIS(obj)

R/O

Num. Array

Y axis matrix values

&YAXIS(obj)

R/O

Num. Array

Z axis matrix values

&ZAXIS(obj)

R/O

Num. Array

Geometric Property	EDA Symbol	Access Type	Data Type
Vertex (X,Y,Z)	&VERTEX(obj)	R/W	Num. Array
Focal length	&FOCAL(obj)	R/W	Number
Tilt angle	&TANG(obj)	R/W	Number
Minimum Y dist.	&YMIN(obj)	R/W	Number
Maximum Y dist.	&YMAX(obj)	R/W	Number
Start point (X,Y,Z)	&SPOINT(obj)	R/O	Num. Array
End point (X,Y,Z)	&EPOINT(obj)	R/O	Num. Array
X axis matrix values	&XAXIS(obj)	R/O	Num. Array
Y axis matrix values	&YAXIS(obj)	R/O	Num. Array
Z axis matrix values	&ZAXIS(obj)	R/O	Num. Array