Converts an angle value to a slope value.

Fixed SlopeFromAngle (
    SInt16 angle
);

angle

The angle, expressed in clockwise degrees from 12 o’clock and treated MOD 180. (90 degrees is thus at 3 o’clock and –90 degrees is at 9 o’clock.)

function result

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 o’clock, and the positive y-axis at 6 o’clock. The x-axis is defined as usual, with the positive side defined as being at 3 o’clock.0

AVAILABILITY

Supported in Carbon. Available in CarbonLib 1.0 and later when InterfaceLib 7.1 or later is installed. Exported by CarbonLib 1.0 and later and by InterfaceLib 7.1 and later.

© 2000 Apple Computer, Inc. — (Last Updated 4/14/2000)