ActionScript for Flash MX: The Definitive Guide, Second Edition

Math.sin() Method

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Returns

The integer mathematically closest to x (or x itself, if x is an integer). If the fractional

component of

x is exactly 0.5 (x is equidistant from the two closest integers), round( )

returns the first integer greater than

x.

Description

The round( ) method performs traditional rounding; it converts a floating-point number to

the nearest integer. Positive numbers with a fractional portion less than 0.5, and negative

numbers with a fractional portion greater than 0.5, are rounded down. Positive numbers

with a fractional portion greater than or equal to 0.5, and negative numbers with a frac-

tional portion less than or equal to 0.5, are rounded up.

Example

Math.round(1.4); // Returns 1

Math.round(1.5); // Returns 2

Math.round(1.6); // Returns 2

Math.round(-5.4); // Returns -5

Math.round(-5.5); // Returns -5

Math.round(-5.6); // Returns -6

See Also

int( ), Math.ceil( ), Math.floor( )

Math.sin() Method

compute the sine of an angle

Flash 5; can be used when exporting Flash 4 movies

Math.sin(theta)

Arguments

theta An angle, in radians (not degrees), normally in the range of 0 to 2π, although

any angle will suffice, as sine is a periodic function.

Returns

The sine of theta (the result is in the range of –1.0 to 1.0).

Description

The sin( ) method