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Three Point Curve
To calculate the full set of curve parameters when three points are given:
Click to show / hide the illustration of curve parameters used in MAGNET Field
- In the Input tab, specify three points to use in calculation. Every point can be entered manually or selected from the map
or from the list
of job points:
- Select which first point will be used to calculate the curve parameters, PC Point (the point of curve) or RP Point (radius point). Depending upon the first curve point chosen, you can define the curve by two different sets of points:
- Specify the PC Point (point of curve) , the Curve Point (any point on the curve), the PT point (point of tangent).
In this case, the coordinates of the RP Point (radius point) will be calculated based on specified curve parameters. You can manually change an automatically offered point name. Select the code for this calculated point from the existing codes and, if required, click
to set the point's attributes. More...
- Specify the RP Point (radius point), PC Point (point of curve), the PT point (point of tangent).
In this case, the distance between RP point and PC point should be equal to the distance between RP point and PT point, and two curves can be created: a Small curve of 180 degrees or less and a Large curve of 180 degrees or more. From the Curve drop-down list, select which of these two curves should be used for computations.
- Click the Calc button
to calculate the curve parameters.
- In the Results tab, review the results of the calculation and click
to save the
data to a *.txt file, if required:
- RP Point is the name of the calculated radius point. To add the calculated RP point to the job, ensure the check box near the calculated point is checked
, then click
.
- Coordinates of calculated RP point.
- Radius of the curve.
- Length of the curve.
- Chord is the distance between the start and end points (tangent points) of the curve.
- Curve angle defines the angle in degrees which is used to compute the radius of curve with the length of 100 units.
- Chord angle defines the angle in degrees which is used to compute the radius of curve whose chord is 100 units long.
- Delta is the internal angle from center to tangent points.
- Tangent is the distance between the point of intersection of the tangents at the starting and ending points, and the ending point.
- External is the shortest distance between the point of intersection and the curve (along the line joining the point of intersection to the radius point).
- Mid Ord is the length of the line segment between the curve and the chord on the line joining the point of intersection to the radius point.
- Segment is the area of a circle bounded by a chord and the circular curve that it cuts off.
- Sector is the area of a circle bounded by two radii and the circular curve they determine.
- Fillet is the area between the circular curve and the two tangents at the start and end points of the curve.
- The Map tab shows the job's objects with the illustration for the results and supports generation of a field report with the results of calculation (use the Create Field Report command from the context menu).
- The Drawing tab shows the illustration for the results and supports generation of a field report with the results of calculation (use the Create Field Report command from the context menu).
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