Class: DefTangentLines

algeobra~DefTangentLines()

Definition of the tangent lines touching arcs and ellipses

Constructor

new DefTangentLines()

Source:

Methods

compute(info) → {Object|Array}

Computes the tangent points
Parameters:
Name Type Description
info CreateInfo The creation info
Source:
Returns:
The tangents of TYPE_LINE in an array or INVALID, if non exist
Type
Object | Array

(static) fromInnerTangents(arc0, arc1, params) → {CreateInfo}

Computes the inner tangents of two arcs. Due to the start and end angles of the arcs, they may not exist even for valid points on the corresponding circles.
Parameters:
Name Type Description
arc0 Number | Object Either the index or value of a TYPE_ARC. The first arc
arc1 Number | Object Either the index or value of a TYPE_ARC. The second arc
params Object
Properties
Name Type Attributes Description
leftOpen Boolean <optional>
 Whether the resulting line extends from the first point
rightOpen Boolean <optional>
 Whether the resulting line extends from the second point
Source:
Returns:
The creation info
Type
CreateInfo

(static) fromOuterTangents(arc0, arc1, params) → {CreateInfo}

Computes the outer tangents of two arcs. Due to the start and end angles of the arcs, they may not exist even for valid points on the corresponding circles.
Parameters:
Name Type Description
arc0 Number | Object Either the index or value of a TYPE_ARC. The first arc
arc1 Number | Object Either the index or value of a TYPE_ARC. The second arc
params Object
Properties
Name Type Attributes Description
leftOpen Boolean <optional>
 Whether the resulting line extends from the first point
rightOpen Boolean <optional>
 Whether the resulting line extends from the second point
Source:
Returns:
The creation info
Type
CreateInfo

(static) fromPointArc(p, arc, params) → {CreateInfo}

Computes the tangent lines on an arc going through the given point. Due to the start and end angles of the arc, they may not exist even for points outside the arc.
Parameters:
Name Type Description
p Number | Object Either the index or value of a TYPE_POINT. The point
arc Number | Object Either the index or value of a TYPE_ARC. The arc
params Object
Properties
Name Type Attributes Description
leftOpen Boolean <optional>
 Whether the resulting line extends from the first point
rightOpen Boolean <optional>
 Whether the resulting line extends from the second point
Source:
Returns:
The creation info
Type
CreateInfo

(static) fromPointEllipse(p, ellipse, params) → {CreateInfo}

Computes the tangent lines on an ellipse going through the given point. Due to the start and end angles of the arc, they may not exist even for points outside the ellipse.
Parameters:
Name Type Description
p Number | Object Either the index or value of a TYPE_POINT. The point
ellipse Number | Object Either the index or value of a TYPE_ELLIPSE. The ellipse
params Object
Properties
Name Type Attributes Description
leftOpen Boolean <optional>
 Whether the resulting line extends from the first point
rightOpen Boolean <optional>
 Whether the resulting line extends from the second point
Source:
Returns:
The creation info
Type
CreateInfo