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SlopeFromAngle |
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Header: | Quickdraw.h | Carbon status: | Supported | |
Converts an angle value to a slope value.
Fixed SlopeFromAngle ( SInt16 angle );
The angle, expressed in clockwise degrees from 12 oclock and treated MOD 180. (90 degrees is thus at 3 oclock and 90 degrees is at 9 oclock.)
The slope corresponding to the angle specified in the angle parameter. Slopes are defined as Dx/Dy, the horizontal change divided by the vertical change between any two points on a line with the given angle. The negative y-axis is defined as being at 12 oclock, and the positive y-axis at 6 oclock. The x-axis is defined as usual, with the positive side defined as being at 3 oclock.
Supported in Carbon. Available in Carbon 1.0.2 and later when running Mac OS 8.1 or later.
© 2000 Apple Computer, Inc. (Last Updated 6/30/2000)