TransitionConditionalProperties Class
A true transition spiral is a curve defined by its curvature, with the curvature function symmetric about midpoint.
- The symmetry condition creates a relationship among the following 4 quantities:
** curvature0 = curvature (i.e. 1/radius) at start ** curvature1 = curvature (i.e. 1/radius) at end ** sweepRadians = signed turning angle from start to end ** arcLength = length of curve
- The relationship is the equation
** sweepRadians = arcLength * average Curvature = arcLength * 0.5 * (curvature0 + curvature1)
- That is, regardless of any curvature properties other than symmetry, specifying any 3 of the quantities fully determines the remaining one.
Methods
| Name | Description | |
|---|---|---|
| constructor(radius0: undefined | number, radius1: undefined | number, bearing0: undefined | Angle, bearing1: undefined | Angle, arcLength: undefined | number): TransitionConditionalProperties | capture numeric or undefined values | |
| applyScaleFactor(a: number): void | Apply a NONZERO scale factor to all distances. | |
| clone(): TransitionConditionalProperties | clone with all properties (i.e. | |
| getIsValidCompleteSet(): boolean | Return true if all components are defined and agree equationally. | |
| isAlmostEqual(other?: TransitionConditionalProperties): boolean | Test if this and other have matching numeric and undefined members. | |
| numDefinedProperties(): number | return the number of defined values among the 5 properties. | |
| tryResolveAnySingleUnknown(): boolean | Examine which properties are defined and compute the (single) undefined. | |
| areAlmostEqual(a: undefined | TransitionConditionalProperties, b: undefined | TransitionConditionalProperties): boolean Static |
Properties
| Name | Type | Description | |
|---|---|---|---|
| bearing0 | undefined | Angle | bearing at start, measured from x towards y | |
| bearing1 | undefined | Angle | bearing at end, measured from x towards y | |
| curveLength | undefined | number | curve length | |
| radius0 | undefined | number | radius (or 0 at start) | |
| radius1 | undefined | number | radius (or 0) at end |
Defined in
Last Updated: 30 November, 2023