SoWEMExtrude

InventorModule

genre	WEMInteraction
author	MeVis Medical Solutions AG
package	MeVisLab/Standard
dll	SoWEM
definition	SoWEM.def
see also	SoView2DWEMContour, WEMExtrude
keywords	surface, interaction

Purpose

The module SoWEMExtrude allows for drawing a contour onto the screen which is then projected into to screen along the viewing direction.

Usage

Add the Open Inventor output to a SoExaminerViewer and draw a contour.

Each drawn contour is extruded to a WEM surface and added to the WEM output.

Details

The contour is drawn in screen coordinates. By means of the projection matrix this contour can be projected onto the near Z clipping plane. By moving this contour along the viewing direction a 3D shape is created: an extruded WEM. The result is only created in the close neighborhood of the scene bounding box.

Interaction

Use a SoExaminerViewer to draw a contour. Every new interaction creates a new contour and thus a new extruded WEM.

Windows

Default Panel

Output Fields

outWEM

name: outWEM, type: WEM(MLBase)

The extruded output WEM.

For accessing this object via scripting see the Scripting Reference: MLWEMWrapper.

self

name: self, type: SoNode

Open Inventor scene to receive drawing event (for drawing the contour).

Parameter Fields

Field Index

Apply: Trigger	pickCulling: Enum	Unify: Bool
Auto Apply: Bool	renderCaching: Enum	Use Jitter: Bool
Auto Update: Bool	renderCulling: Enum
autoClear: Bool	status: String
boundingBoxCaching: Enum	Subdivide: Bool
Clear: Trigger	Triangulate: Bool
Hit Points: Vector2List	triangulationMode: Enum
Jitter Factor: Float	Undo: Trigger

Visible Fields

Auto Apply

name: autoApply, type: Bool, default: TRUE

If checked, the module computes anew on each parameter change.

Auto Update

name: autoUpdate, type: Bool, default: TRUE

If checked, the module computes anew on each input change.

Apply

name: apply, type: Trigger

When pressed, the module computes a new output.

Clear

name: clear, type: Trigger

When pressed, the extruded output WEM is cleared.

Triangulate

name: triangulate, type: Bool, default: TRUE

If checked, the extruded WEM consists of triangles only.

Subdivide

name: subdivide, type: Bool, default: TRUE

If checked, the extruded WEM is subdivided so that no large triangles (polygons) will be generated.

Undo

name: undo, type: Trigger

When pressed, the last extrusion is undone.

Unify

name: unify, type: Bool, default: FALSE

If checked, consecutively extruded (and overlapping) WEMs are unified by a boolean operation.

Hit Points

name: hitPoints, type: Vector2List, default: 0 0

Sets a string of x / y screen coordinates to constitute the contour (if not drawn interactively).

Use Jitter

name: useJitter, type: Bool, default: FALSE

If checked, the jitter factor is used to displace drawn and generated points randomly.

Jitter Factor

name: jitterFactor, type: Float, default: 0.1, minimum: 0.1, maximum: 10

Sets a factor for randomly displacing the drawn or set points for the contour.

If the WEM to cut with the extruded WEM is very regular, using the jittering can redeem some artifacts.

This only has an effect if Use Jitter is checked.

Hidden Fields

renderCaching

name: renderCaching, type: Enum, default: OFF

Values:

Title	Name
On	ON
Off	OFF
Auto	AUTO

boundingBoxCaching

name: boundingBoxCaching, type: Enum, default: OFF

Values:

Title	Name
On	ON
Off	OFF
Auto	AUTO

renderCulling

name: renderCulling, type: Enum, default: AUTO

Values:

Title	Name
On	ON
Off	OFF
Auto	AUTO

pickCulling

name: pickCulling, type: Enum, default: OFF

Values:

Title	Name
On	ON
Off	OFF
Auto	AUTO

autoClear

name: autoClear, type: Bool, default: TRUE

status

name: status, type: String

triangulationMode

name: triangulationMode, type: Enum, default: TRIANGULATION_STRIP

Values:

Title	Name
Center	TRIANGULATION_CENTER
Fan	TRIANGULATION_FAN
Strip	TRIANGULATION_STRIP