SoComplexity

InventorModule

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

Purpose

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

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

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

The SoComplexity node also 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; SoTexture2 nodes previously traversed 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

How shape complexity is interpreted.

Values:

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

Value

name: value, type: Float, default: 0.5

Complexity value.

Texture Quality

name: textureQuality, type: Float, default: 0.5

Hint about texture quality. A value of 0 indicates that the fastest texturing should be used, while a value of 1 indicates that the best quality texturing should be used.