Figure 15.4, “ Engine Class Tree ” shows the class tree for engines, which can be grouped according to the kinds of operations they perform.
Arithmetic engines are as follows:
SoCalculator
SoBoolOperation
SoInterpolateFloat, SoInterpolateRotation, SoInterpolateVec2f, SoInterpolateVec3f, SoInterpolateVec4f
SoTransformVec3f
SoComposeVec2f, SoDecomposeVec2f SoComposeVec3f, SoDecomposeVec3f SoComposeVec4f, SoDecomposeVec4f SoComposeRotation, SoDecomposeRotation SoComposeMatrix, SoDecomposeMatrix
SoComputeBoundingBox
Animation engines are as follows:
SoElapsedTime
SoOneShot
SoTimeCounter
Triggered engines are as follows:
SoCounter
SoOnOff
SoTriggerAny
SoGate
