flash.display.ShaderPrecision - Adobe® Flex® 4 Language Reference (Flex 4)

Package	flash.display
Class	public final class ShaderPrecision
Inheritance	ShaderPrecision Object

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

This class defines the constants that represent the possible values for the Shader class's precisionHint property. Each constant represents one of the precision modes for executing shader operations.

The precision mode selection affects the following shader operations. These operations are faster on an Intel processor with the SSE instruction set:

sin(x)
cos(x)
tan(x)
asin(x)
acos(x)
atan(x)
atan(x, y)
exp(x)
exp2(x)
log(x)
log2(x)
pow(x, y)
reciprocal(x)
sqrt(x)

See also

flash.display.Shader.precisionHint

Public Properties

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	Property		Defined By
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		prototype : Object [static] A reference to the prototype object of a class or function object.	Object

Public Methods

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	Method		Defined By
		hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined.	Object
		isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.	Object
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations.	Object
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns the string representation of the specified object.	Object
		valueOf():Object Returns the primitive value of the specified object.	Object

Public Constants

	Constant		Defined By
		FAST : String = "fast" [static] Represents fast precision mode.	ShaderPrecision
		FULL : String = "full" [static] Represents full precision mode.	ShaderPrecision

Constant Detail

FAST

Constant

public static const FAST:String = "fast"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Represents fast precision mode.

Fast precision mode is designed for maximum performance but does not work consistently on different platforms and individual CPU configurations. In many cases, this level of precision is sufficient to create graphic effects without visible artifacts.

It is usually faster to use fast precision mode than to use lookup tables.

FULL

Constant

public static const FULL:String = "full"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Represents full precision mode.

In full precision mode, the shader computes all math operations to the full width of the IEEE 32-bit floating standard. This mode provides consistent behavior on all platforms. In this mode, some math operations such as trigonometric and exponential functions can be slow.