ColorInterpolator node

ColorInterpolator {
  SFFloat set_fraction 0
  SFColor value_changed 0 0
  MFFloat key []
  MFColor keyValue []
}

This interpolator is used to interpolate colors.

See Interpolators for a detailed explanation on how interpolators work and when to use them.

SFFloat set_fraction 0 :
Value usaly routed from the TimeSensor.fraction_changed field. See Interpolators.

SFColor value_changed 0 0 :
When a new color is computed form the ColorInterpolator, it is sent to the value_changed field.

MFFloat key [] :
List of float values between 0 and 1. See Interpolators.

MFColor keyValue [] :
Contains a color (the 3 RGB components) for each value of the key list.

#VRML V2.0 utf8
DEF TIMER TimeSensor {
    cycleInterval 2  # two seconds
    startTime 1 # timer starts at one sec after application launch, implicit stopTime set to 1+2 = 3 seconds after application launch
}
DEF INTERP ColorInterpolator {
    key [ 0, 0.3, 0.6, 1 ]  # 4 equidistant keys
    keyValue [ 0 0 0, 1 0 0, 0 1 0, 0 0 1 ] # rainbow
}
Transform2D {
    children [
        Shape {
            appearance Appearance {
                material DEF MAT Material2D { emissiveColor 1 0.4 0 }
            }
            geometry Rectangle { size 50 50 }
        }
    ]
}

ROUTE TIMER.fraction_changed TO INTERP.set_fraction
ROUTE INTERP.value_changed TO MAT.emissiveColor