SoView2DShaderOverlay¶

InventorModule¶

genre	`View2DExtended`
author	`MeVis Medical Solutions AG`
package	`MeVisLab/Standard`
dll	`SoView2D`
definition	SoView2DShader.def
inherits from	`SoView2DExtension`
keywords	`GLSL`

Purpose¶

The SoView2DShaderOverlay allows to render overlays on top of a SoView2D using a custom shader pipeline.

This shader can be extended using SoView2DShaderFunction and SoView2DShaderInclude. For debugging, place a SoView2DShaderDiagnosis before this module.

The shader has access to the GLSL shader framework, so you can make use of any shader parameters and samplers.

The generated shader offers the rendering of multiple SoView2DOverlay and SoView2DOverlayMPR overlays inside of a single shader. This allows to create effects based on the values of multiple overlays.

For best blending results, you should typically use “Blend” in the overlay modules and “Pre-multiplied Blend” on the overlay shader module. This is the case because the individual overlays are first blended inside the shader using front-to-back blending, which results in a result color and alpha value. The result color is already multiplied with the alpha (which is called premultiplied). Thus, the correct blend mode for the final result color is pre-multiplied blend.

Parameter Fields¶

Field Index¶

`alt`: `Enum`	`createNewModeRequest`: `Trigger`	`needsValidVoxel`: `Bool`
`Blend Mode`: `Enum`	`cursorShape`: `Enum`	`Render On Slab`: `Bool`
`button1`: `Enum`	`Disable Base Image Drawing`: `Bool`	`selectionTolerance`: `Float`
`button2`: `Enum`	`Drawing On`: `Bool`	`setEventHandled`: `Bool`
`button3`: `Enum`	`editingOn`: `Bool`	`shift`: `Enum`
`Clip To Slice`: `Bool`	`fixZOn`: `Bool`	`wantsAllEvents`: `Bool`
`color`: `Color`	`ignoreHandledEvents`: `Bool`	`wantsKeyEvents`: `Bool`
`control`: `Enum`	`interactionProviderID`: `String`	`wantsMouseWheelEvents`: `Bool`
`createNewMode`: `Bool`	`maskValid`: `Bool`

Visible Fields¶

Drawing On¶

name: drawingOn, type: Bool, default: TRUE¶

see SoView2DExtension.drawingOn

Render On Slab¶

name: renderOnSlab, type: Bool, default: FALSE¶

Clip To Slice¶

name: clipToSlice, type: Bool, default: FALSE¶

Blend Mode¶

name: blendMode, type: Enum, default: BLEND_PREMULTIPLIED_BLEND¶: Selects the blend mode of the shader’s result.

Values:

Title	Name
Replace	BLEND_REPLACE
Add	BLEND_ADD
Screen	BLEND_SCREEN
Blend	BLEND_BLEND
Premultiplied Blend	BLEND_PREMULTIPLIED_BLEND
Maximum	BLEND_MAXIMUM
Minimum	BLEND_MINIMUM
Reverse Subtract	BLEND_REVERSE_SUBTRACT
Subtract	BLEND_SUBTRACT