SoComplexity

InventorModule

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

Purpose

The node SoComplexity sets the current shape complexity value. This heuristic value provides a hint regarding the geometric complexity at which to render shape nodes. Values range from 0 to 1, where 0 indicates minimum complexity and 1 indicates maximum complexity. Each shape node interprets complexity in its own way.

Shape complexity always affects rendering and primitive generation for the SoCallbackAction. For certain shapes, it also affects picking.

There are three ways to interpret shape complexity, depending on the :field:type field. BOUNDING_BOX complexity ignores the Value field and renders all shapes as bounding boxes, using the current material, drawing style, and other parameters. The other two types use the Value to determine the tessellation of shapes into polygons. OBJECT_SPACE complexity uses the Value field directly to dictate the tessellation. SCREEN_SPACE complexity relies on the Value field and the projected size of the shape on the screen; a value of 0 produces the minimum tessellation for a shape, while a value of 1 generates a tessellation fine enough that each edge of a polygon is about one or two pixels in length. Since the projected size depends on the camera position, objects may be tessellated differently each frame if the camera is moving. Note that this may adversely affect render caching in SoSeparator nodes.

Additionally, the SoComplexity node sets a hint for the quality of textures applied to shapes, based on the value of the Texture Quality field. The texture quality will take effect at the next SoTexture2 node; previously traversed SoTexture2 nodes will not be affected.

Windows

Default Panel

Output Fields

self

name: self, type: SoNode

Parameter Fields

Visible Fields

Type

name: type, type: Enum, default: OBJECT_SPACE

Defines how shape complexity is interpreted.

Values:

Title	Name	Description
Object Space	OBJECT_SPACE	Sets complexity independent of screen size
Screen Space	SCREEN_SPACE	Sets complexity based on screen size
Bounding Box	BOUNDING_BOX	Draws all shapes as bounding boxes

Value

name: value, type: Float, default: 0.5

Sets the complexity value.

Texture Quality

name: textureQuality, type: Float, default: 0.5

Sets a hint regarding texture quality. A value of 0 indicates that the fastest texturing should be used, while a value of 1 indicates that the highest quality texturing should be applied.