Three Objects

Synopsis

obj = FILLET/[{IN|OUT|TANTO/}],obj1,[{IN|OUT|TANTO/}],obj2,[{IN|OUT|TANTO/}],obj3,CENTER,point[,NOTRIM][,IFERR,label:]

Description

Creates a fillet between three previously defined objects which may be any combination of points, lines, arcs, conics, and B-splines. The radius required to make the fillet tangent to all three objects is automatically calculated.

The objects do not have to intersect, be planar, or be co-planar with each other. The fillet is constructed counterclockwise from the first object to the third object. The second object does not have to be tangent to the constructed portion of the fillet.

You must specify a previously defined point in the vicinity of the fillet radius center. The point specifies which of several possible fillets is to be created.

Parameters

Parameter

Description

IN,OUT,TANTO

If the following object is a circle, the minor word IN, OUT or TANTO may be used to indicate the location of the circle with respect to the fillet. If the point of tangency is between the circle center and the fillet center, OUT must be specified. If the circle center is between the fillet center and the point of tangency, IN must be specified. If the fillet center is between the circle center and the point of tangency, TANTO must be specified. The default is OUT.

obj1,obj2,obj3

Three existing objects to be filleted. They may be any combination of points, lines, arcs, conics, or B-splines.

CENTER

Minor word that indicates that a point is to be supplied which approximates the location of the fillet center.

point

A previously defined point which approximates the location of the fillet center.

NOTRIM

If the NOTRIM parameter is included the objects remain unchanged. If omitted, the objects are trimmed to the points of tangency.

NOTE: Care must be taken when using the trim feature since the second object disappears.

IFERR,label:

Specifies a label to which program execution jumps if an error occurs.

Example

Creating a fillet tangent to three circles. The statement utilizes the IN and OUT minor words to define the point of tangency.

OUT is specified for CR3 because its center is outside of the fillet.

IN is specified for CR1 because its center is inside of the fillet.

Declaration

ENTITY/CR1,CR2,CR3,PT1,FLT1

Geometry Definition

CR1 =CIRCLE/0,0,.5
CR2 =CIRCLE/-1.5,-.25,.5
CR3 =CIRCLE/1.5,.75,.5
PT1 =POINT/1,-.5

Fillet Definition

FLT1=FILLET/OUT,CR3,IN,CR1,OUT,CR2,CENTER,PT1,$
NOTRIM

Fillet Three Circles without Trimming

Example

Creating a fillet tangent to a a line and two B-splines.

NOTRIM suppresses the curve trimming.

Declaration

ENTITY/LN1,SPLN1,SPLN2,PT(7),FLT1

Geometry Definition

PT(1)=POINT/0,1
PT(2)=POINT/-2,-2
PT(3)=POINT/-.5,0
PT(4)=POINT/-1,3
PT(5)=POINT/2,-2
PT(6)=POINT/.5,0
PT(7)=POINT/1,3
LN1=LINE/-1,2,1,2
SPLN1=SPLINE/PT(2..4)
SPLN2=BCURVE/PT(5..7)

Fillet Definition

FLT1=FILLET/SPLN2,LN1,SPLN1,CENTER,PT(1),NOTRIM

Filleting a Line and Two B-splines Without Trimming

Example

Creating a fillet tangent to three objects. The statement utilizes the IN minor word to define the point of tangency on the circle (CR1).

IN is specified for CR1 because its center is inside of the fillet.

Declaration

ENTITY/CR1,LN1,LN2,PT1,FLT1

Geometry Definition

CR1 =CIRCLE/0,2,.5
PT1 =POINT/0,1.75
LN1 =LINE/0,0,1,2
LN2 =LINE/0,0,-1,2

Fillet Definition

FLT1=FILLET/LN1,IN,CR1,LN2,CENTER,PT1,NOTRIM

Three Object Fillet without Trimming

Example

Creating a fillet tangent to three objects. The statement utilizes the IN minor word to define the point of tangency on the circle (CR1).

IN is specified for CR1 because its center is inside of the fillet.

Declaration

ENTITY/CR1,LN1,LN2,PT1,FLT1

Geometry Definition

CR1 =CIRCLE/0,2,.5
PT1 =POINT/0,1.75
LN1 =LINE/0,0,1,2
LN2 =LINE/0,0,-1,2

Fillet Definition

FLT1=FILLET/LN1,IN,CR1,LN2,CENTER,PT1

Three Object Fillet with Trimming

Parameter	Description
IN,OUT,TANTO	If the following object is a circle, the minor word IN, OUT or TANTO may be used to indicate the location of the circle with respect to the fillet. If the point of tangency is between the circle center and the fillet center, OUT must be specified. If the circle center is between the fillet center and the point of tangency, IN must be specified. If the fillet center is between the circle center and the point of tangency, TANTO must be specified. The default is OUT.
obj1,obj2,obj3	Three existing objects to be filleted. They may be any combination of points, lines, arcs, conics, or B-splines.
CENTER	Minor word that indicates that a point is to be supplied which approximates the location of the fillet center.
point	A previously defined point which approximates the location of the fillet center.
NOTRIM	If the NOTRIM parameter is included the objects remain unchanged. If omitted, the objects are trimmed to the points of tangency. NOTE: Care must be taken when using the trim feature since the second object disappears.
IFERR,label:	Specifies a label to which program execution jumps if an error occurs.