ArcMotion
class ArcMotion : PathMotion
A PathMotion that generates a curved path along an arc on an imaginary circle containing the two points. If the horizontal distance between the points is less than the vertical distance, then the circle's center point will be horizontally aligned with the end point. If the vertical distance is less than the horizontal distance then the circle's center point will be vertically aligned with the end point.
When the two points are near horizontal or vertical, the curve of the motion will be small as the center of the circle will be far from both points. To force curvature of the path, setMinimumHorizontalAngle and setMinimumVerticalAngle may be used to set the minimum angle of the arc between two points.
This may be used in XML as an element inside a transition.
<changeBounds>
<arcMotion android:minimumHorizontalAngle="15"
android:minimumVerticalAngle="0"
android:maximumAngle="90"/>
</changeBounds>
Summary
Public constructors |
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ArcMotion(context: Context, attrs: AttributeSet) |
Public functions |
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Float |
Returns the maximum arc along the circle between two points. |
Float |
Returns the minimum arc along the circle between two points aligned near horizontally. |
Float |
Returns the minimum arc along the circle between two points aligned near vertically. |
Path |
Provide a Path to interpolate between two points |
Unit |
setMaximumAngle(angleInDegrees: Float)Sets the maximum arc along the circle between two points. |
Unit |
setMinimumHorizontalAngle(angleInDegrees: Float)Sets the minimum arc along the circle between two points aligned near horizontally. |
Unit |
setMinimumVerticalAngle(angleInDegrees: Float)Sets the minimum arc along the circle between two points aligned near vertically. |
Public constructors
Public functions
getMaximumAngle
fun getMaximumAngle(): Float
Returns the maximum arc along the circle between two points. When start and end points have close to equal x and y differences, the curve between them is large. This forces the curved path to have an arc of at most the given angle.
The default value is 70 degrees.
| Returns | |
|---|---|
Float |
The maximum angle of the arc on a circle describing the Path between the start and end points. |
getMinimumHorizontalAngle
fun getMinimumHorizontalAngle(): Float
Returns the minimum arc along the circle between two points aligned near horizontally. When start and end points are close to horizontal, the calculated center point of the circle will be far from both points, giving a near straight path between the points. By setting a minimum angle, this forces the center point to be closer and give an exaggerated curve to the path.
The default value is 0.
| Returns | |
|---|---|
Float |
The minimum arc along the circle between two points aligned near horizontally. |
getMinimumVerticalAngle
fun getMinimumVerticalAngle(): Float
Returns the minimum arc along the circle between two points aligned near vertically. When start and end points are close to vertical, the calculated center point of the circle will be far from both points, giving a near straight path between the points. By setting a minimum angle, this forces the center point to be closer and give an exaggerated curve to the path.
The default value is 0.
| Returns | |
|---|---|
Float |
The minimum angle of the arc on a circle describing the Path between two nearly vertically-separated points. |
getPath
fun getPath(startX: Float, startY: Float, endX: Float, endY: Float): Path
Provide a Path to interpolate between two points (startX, startY) and (endX, endY). This allows controlled curved motion along two dimensions.
setMaximumAngle
fun setMaximumAngle(angleInDegrees: Float): Unit
Sets the maximum arc along the circle between two points. When start and end points have close to equal x and y differences, the curve between them is large. This forces the curved path to have an arc of at most the given angle.
The default value is 70 degrees.
| Parameters | |
|---|---|
angleInDegrees: Float |
The maximum angle of the arc on a circle describing the Path between the start and end points. |
setMinimumHorizontalAngle
fun setMinimumHorizontalAngle(angleInDegrees: Float): Unit
Sets the minimum arc along the circle between two points aligned near horizontally. When start and end points are close to horizontal, the calculated center point of the circle will be far from both points, giving a near straight path between the points. By setting a minimum angle, this forces the center point to be closer and give an exaggerated curve to the path.
The default value is 0.
| Parameters | |
|---|---|
angleInDegrees: Float |
The minimum angle of the arc on a circle describing the Path between two nearly horizontally-separated points. |
setMinimumVerticalAngle
fun setMinimumVerticalAngle(angleInDegrees: Float): Unit
Sets the minimum arc along the circle between two points aligned near vertically. When start and end points are close to vertical, the calculated center point of the circle will be far from both points, giving a near straight path between the points. By setting a minimum angle, this forces the center point to be closer and give an exaggerated curve to the path.
The default value is 0.
| Parameters | |
|---|---|
angleInDegrees: Float |
The minimum angle of the arc on a circle describing the Path between two nearly vertically-separated points. |