OpenGLContext.scenegraph.spherebackground

Gradient-sphere background node

Functions

_linInterp( a , b , atAngle )

Classes

class _SphereBackground( object ):

bound

exposedField SFBool bound 0

groundAngle

exposedField MFFloat groundAngle []

groundColor

exposedField MFColor groundColor []

skyAngle

exposedField MFFloat skyAngle []

skyColor

exposedField MFColor skyColor 0.0, 0.0 ]

buildSphere( self , colorSet )

Build a coordinate-set for the color/angle mapping

colorSet( self )

Compound the sky and ground angle:color arrays into a single angle:color array-set

compile( self , mode = None )

Build the cached display list for this background object

Note: we store 2 display lists in the cache, but only return one from the compile method. The second list is the final rendering list, while the first is just the low-level rendering code.

pushOut( self , colorSet , start , stop )

Push the colorSet values out to a distance they can be seen

Basically, if there is no value between pi/4 and 3pi/4, insert values at those points with the proper linear interpolation for colour.

Render( self , mode , clear = 1 )

Render the Background

mode: the RenderingPass object representing the current rendering pass
clear: whether or not to do a background clear before rendering

Note: the SphereBackground node only renders if the mode's passCount == 0

class SphereBackground( _SphereBackgroundBackgroundChildrenNode ):

Gradient-sphere Background Node

This Background object (gradient sphere) provides a smooth-shaded gradiant which can be useful for certain abstract or low-overhead worlds. A sphere is created which fades between a given set of colors at given latitudes.

The SphereBackground node tries to follow the VRML97 Background node's semantics for the included fields as much as possible.

Reference: http://www.web3d.org/x3d/specifications/vrml/ISO-IEC-14772-IS-VRML97WithAmendment1/part1/nodesRef.html#Background