The Flex ShaderFilter class abstracts away many of the details of using
the Flash ShaderFilter, Shader, and ShaderData classes to apply a
Pixel Bender shader as a filter.
The ShaderFilter class must be initialized with either an instance of a Shader
object or Class representative of a Shader (such as from an Embed). The ShaderFilter
class then serves as a proxy to the underlying Shader, providing a convenience
mechanism for accessing both scalar and multi-dimensional shader input parameters
directly as simple named properties.
To set a simple scalar shader input parameter, such as of type FLOAT or INT, you can
refer to the property directly, for example, myFilter.radius.
To set or animate an individual component of a multidimensional shader input parameter, such as
FLOAT2, you can use a property suffix convention to access the individual value directly.
The following code shows two ways to set the first and second components of the FLOAT2
property center:
// 'center' is an input parameter of type FLOAT2.
shader.center = [10,20];
// Use property suffix convention to access the first and second component of 'center'.
shader.center_x = 10;
shader.center_y = 20;
The full set of supported property suffixes that you can use are as follows:
For shader input parameters of type BOOL2, BOOL3, BOOL4, FLOAT2, FLOAT3, FLOAT4, INT2,
INT3, or INT4, you can use "r g b a", "x y z w", or "s t p q"
to access the 1st, 2nd, 3rd and 4th component, respectively.
For shader input parameters of type MATRIX2x2, MATRIX3x3, or MATRIX4x4, you can use
"a b c d e f g h i j k l m n o p" to access the
1st - 16th component of a given matrix, respectively.
As properties on the ShaderFilter change (such as during animation), the
ShaderFilter automatically reapplies itself to the filters array of the visual
component it is applied to.
Implementation public function get bottomExtension():int public function set bottomExtension(value:int):void
leftExtension
property
leftExtension:int
Language Version :
ActionScript 3.0
Product Version :
Flex 4
Runtime Versions :
Flash Player 10, AIR 1.5
The default value is 0.
Implementation public function get leftExtension():int public function set leftExtension(value:int):void
precisionHint
property
precisionHint:String
Language Version :
ActionScript 3.0
Product Version :
Flex 4
Runtime Versions :
Flash Player 10, AIR 1.5
The precision of math operations performed by the underlying shader.
The set of possible values for the precisionHint property is defined
by the constants in the ShaderPrecision class.
The default value is ShaderPrecision.FULL.
Implementation public function get precisionHint():String public function set precisionHint(value:String):void
flash.utils.Proxy
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