SoBlendMode

InventorModule

genre	Shader
author	MeVis Medical Solutions AG
package	MeVisLab/Standard
dll	SoShader
definition	SoShader.def

Purpose

The SoBlendMode allows for overriding the OpenGL blending function. It provides useful defaults but also offers all GL blending functionality using the custom blend modes.

Parameter Fields

Field Index

Alpha Blend Function Dst: Enum	Enabled: Bool
Alpha Blend Function Src: Enum
Blend Equation: Enum
Blend Function Dst: Enum
Blend Function Src: Enum
Blend Mode: Enum
Constant Blend Alpha: Float
Constant Blend Color: Color

Visible Fields

Enabled

name: enabled, type: Bool, default: FALSE

If checked, the module is enabled.

Blend Mode

name: blendMode, type: Enum, default: BLEND_BLEND

Defines the blend mode.

Values:

Title	Name	Description
​Off	​BLEND_OFF	​Turns blending off.
​Replace	​BLEND_REPLACE	​Replaces the target value.
​Add	​BLEND_ADD	​Adds the source to the destination.
​Blend	​BLEND_BLEND	​Blends back-to-front.
​Premultiplied Blend	​BLEND_PREMULTIPLIED_BLEND	​Blend back-to-front. Source color is expected to have premultiplied alpha.
​Min	​BLEND_MIN	​Min blending (for each component separately).
​Max	​BLEND_MAX	​Max blending (for each component separately).
​Custom	​BLEND_CUSTOM	​Custom blend mode, see equation and functions.
​Custom Separate	​BLEND_CUSTOM_SEPARATE	​Custom blend mode with separate alpha settings, see equation and functions.
​Screen	​BLEND_SCREEN

Blend Equation

name: blendEquation, type: Enum, default: ADD

Defines the custom blend equation.

Values:

Title	Name
​Add	​ADD
​Subtract	​SUBTRACT
​Reverse Subtract	​REVERSE_SUBTRACT

Blend Function Src

name: blendFunctionSrc, type: Enum, default: SRC_ALPHA

Defines the source function.

Values:

Title	Name
​Zero	​ZERO
​One	​ONE
​Src Color	​SRC_COLOR
​One Minus Src Color	​ONE_MINUS_SRC_COLOR
​Dst Color	​DST_COLOR
​One Minus Dst Color	​ONE_MINUS_DST_COLOR
​Src Alpha	​SRC_ALPHA
​One Minus Src Alpha	​ONE_MINUS_SRC_ALPHA
​Dst Alpha	​DST_ALPHA
​One Minus Dst Alpha	​ONE_MINUS_DST_ALPHA
​Constant Color	​CONSTANT_COLOR
​One Minus Constant Color	​ONE_MINUS_CONSTANT_COLOR
​Constant Alpha	​CONSTANT_ALPHA
​One Minus Constant Alpha	​ONE_MINUS_CONSTANT_ALPHA
​Src Alpha Saturate	​SRC_ALPHA_SATURATE

Blend Function Dst

name: blendFunctionDst, type: Enum, default: ONE_MINUS_SRC_ALPHA

Defines the destination function.

Values:

Title	Name
​Zero	​ZERO
​One	​ONE
​Src Color	​SRC_COLOR
​One Minus Src Color	​ONE_MINUS_SRC_COLOR
​Dst Color	​DST_COLOR
​One Minus Dst Color	​ONE_MINUS_DST_COLOR
​Src Alpha	​SRC_ALPHA
​One Minus Src Alpha	​ONE_MINUS_SRC_ALPHA
​Dst Alpha	​DST_ALPHA
​One Minus Dst Alpha	​ONE_MINUS_DST_ALPHA
​Constant Color	​CONSTANT_COLOR
​One Minus Constant Color	​ONE_MINUS_CONSTANT_COLOR
​Constant Alpha	​CONSTANT_ALPHA
​One Minus Constant Alpha	​ONE_MINUS_CONSTANT_ALPHA
​Src Alpha Saturate	​SRC_ALPHA_SATURATE

Alpha Blend Function Src

name: alphaBlendFunctionSrc, type: Enum, default: SRC_ALPHA

Defines the alpha source function.

Values:

Title	Name
​Zero	​ZERO
​One	​ONE
​Src Color	​SRC_COLOR
​One Minus Src Color	​ONE_MINUS_SRC_COLOR
​Dst Color	​DST_COLOR
​One Minus Dst Color	​ONE_MINUS_DST_COLOR
​Src Alpha	​SRC_ALPHA
​One Minus Src Alpha	​ONE_MINUS_SRC_ALPHA
​Dst Alpha	​DST_ALPHA
​One Minus Dst Alpha	​ONE_MINUS_DST_ALPHA
​Constant Color	​CONSTANT_COLOR
​One Minus Constant Color	​ONE_MINUS_CONSTANT_COLOR
​Constant Alpha	​CONSTANT_ALPHA
​One Minus Constant Alpha	​ONE_MINUS_CONSTANT_ALPHA
​Src Alpha Saturate	​SRC_ALPHA_SATURATE

Alpha Blend Function Dst

name: alphaBlendFunctionDst, type: Enum, default: ONE_MINUS_SRC_ALPHA

Defines the alpha destination function.

Values:

Title	Name
​Zero	​ZERO
​One	​ONE
​Src Color	​SRC_COLOR
​One Minus Src Color	​ONE_MINUS_SRC_COLOR
​Dst Color	​DST_COLOR
​One Minus Dst Color	​ONE_MINUS_DST_COLOR
​Src Alpha	​SRC_ALPHA
​One Minus Src Alpha	​ONE_MINUS_SRC_ALPHA
​Dst Alpha	​DST_ALPHA
​One Minus Dst Alpha	​ONE_MINUS_DST_ALPHA
​Constant Color	​CONSTANT_COLOR
​One Minus Constant Color	​ONE_MINUS_CONSTANT_COLOR
​Constant Alpha	​CONSTANT_ALPHA
​One Minus Constant Alpha	​ONE_MINUS_CONSTANT_ALPHA
​Src Alpha Saturate	​SRC_ALPHA_SATURATE

Constant Blend Color

name: constantBlendColor, type: Color, default: 1 1 1

Sets the constant blend color.

Constant Blend Alpha

name: constantBlendAlpha, type: Float, default: 1

Sets the constant blend alpha.