Converts an angle value to a slope value.

Fixed SlopeFromAngle (
    SInt16 angle
);

Parameter descriptions

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.

AVAILABILITY

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)