SoAntiSquish

InventorModule

genre	InventorNodesAutomatic
author	Silicon Graphics Inc
package	MeVisLab/Standard
definition	inventor.def

Purpose

This node removes nonuniform 3D scaling from the current transformation matrix when traversed by an action. It is used by draggers such as the SoTrackballDragger that need to stay uniformly scaled no matter where they are located in the scene graph.

The magnitude of the new scale is determined by the current transformation matrix and the Sizing field. This node does not change the translation or rotation in the matrix.

Windows

Default Panel

Output Fields

self

name: self, type: SoNode

Parameter Fields

Visible Fields

Sizing

name: sizing, type: Enum, default: AVERAGE_DIMENSION

Determines which of the algorithms enumerated by the type. Sizing will be used to select the new scale when the x,y, and z scales are not equal.

Values:

Title	Name	Description
X	X	Fits the other two axes to match the X axis, whose size is unchanged.
Y	Y	Fits the other two axes to match the Y axis, whose size is unchanged.
Z	Z	Fits the other two axes to match the Z axis, whose size is unchanged.
Average Dimension	AVERAGE_DIMENSION	Uses average of 3 scales in the matrix.
Biggest Dimension	BIGGEST_DIMENSION	Uses biggest of 3 scales in the matrix.
Smallest Dimension	SMALLEST_DIMENSION	Uses smallest of 3 scales in the matrix.
Longest Diagonal	LONGEST_DIAGONAL	Accounts for shearing; transforms a cube by the matrix and then uses length of longest diagonal.

Recalc Always

name: recalcAlways, type: Bool, default: TRUE

If Recalc Always is TRUE, this node calculates its unsquishing matrix every time it is traversed. If FALSE, then this only occurs during the first traversal following a call to recalc().