Titania X3D Editor

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Titania v4.0.1

Bring Colours to Your Life.

X3D Reference

ECMAScript Object and Function Definitions

ECMAScript Object and Function Definitions

There are a fixed set of objects in ECMAScript, each of which have a fixed set of properties (i.e. values) and methods (i.e. functions). For all object types except Math, there are functions to create an instance of the object. The supported set of objects are:

parseInt and parseFloat Functions

These 2 functions are provided to convert a String value to an Number value.

Number parseInt (s, [radix])

Converts the passed String, 's', to an integer valued number, using the optional passed numeric 'radix' as the base. If the radix is omitted base 10 is assumed. Numbers can be in decimal (123), hexadecimal (0x5C) or octal (0177) notation and may be preceded by a minus sign ('-'). Conversion stops at the first unrecognized character. If the string begins with an unrecognized character, 0 is returned.

Number parseFloat (s)

Converts the passed String, 's', to a floating point valued number. Numbers can be in fixed (1.23) or exponential (12E3) notation and both the mantissa and exponent may be preceded by a minus sign ('-'). Conversion stops at the first unrecognized character. If the string begins with an unrecognized character, 0 is returned.

Math Object

The Math object is unique in ECMAScript in that there is exactly one globally available instance of the object, named Math. Properties can be accessed using the syntax Math.<property-name>. Methods can be invoked using the syntax Math.<function-name> ( <argument-list> ).

Instance Creation Method(s)

None. One global instance of the object is available. The name of the instance is Math.

Properties

E

Euler's constant, e, approximately 2.718.

LN10

Natural logarithm of 10, approximately 2.302.

LN2

Natural logarithm of 2, approximately 0.693.

PI

Ratio of the circumference of a circle to its diameter, approximately 3.1415.

SQRT1_2

Square root of ½, approximately 0.707.

SQRT2

Square root of 2, approximately 1.414.

Methods

abs (number)

Returns the absolute value of number.

acos (number)

Returns the arc cosine (in radians) of number.

asin (number)

Returns the arc sine (in radians) of number.

atan (number)

Returns the arc tangent (in radians) of number.

ceil (number)

Returns the least integer greater than or equal to number.

cos (number)

Returns the cosine of number where number is expressed in radians.

exp (number)

Returns e, to the power of number (i.e. enumber).

floor (number)

Returns the greatest integer less than or equal to its argument.

log (number)

Returns the natural logarithm (base e) of number.

max (number1, number2)

Returns the greater of number1 and number2.

min (number1, number2)

Returns the lesser of number1 and number2.

pow (base, exponent)

Returns base to the exponent power (i.e. base exponent).

random ()

Returns a pseudo-random number between zero and one.

round (number)

Returns the value of number rounded to the nearest integer.

sin (number)

Returns the sine of number where number is expressed in radians.

sqrt (number)

Returns the square root of its argument.

tan (number)

Returns the tangent of number, where number is expressed in radians.