Books
REDsdk 5.3
Tutorials
Tasks
API
Defining root motion policies for a walking character
In this task, let's take an example of root motion policies for a biped character walking on a ground:
- For RED::RMC_ROTATION: the rotation is handled by the animation and stays absolute. We set RED::RMP_DEFAULT with no extraction.
- For RED::RMC_POSITION_X and RED::RMC_POSITION_Y: the translations on the X and Y axes are handled by the animation but we want a relative motion. We set RED::RMP_DELTA with extraction and apply the delta transform ourselves on the parent shape.
- For RED::RMC_POSITION_Z: the character should follow the ground level, the translation on the Z axis is handled externally. We set RED::RMP_ZERO.
// RED::Object* animController is a skeletal animation clip controller.
RED::ISkeletalAnimationController* iskeletalController = animController->As< RED::ISkeletalAnimationController >();
// Rotation is handled by the animation.
RC_TEST( iskeletalController->SetRootMotionPolicy( RED::RMC_ROTATION, RED::RMP_DEFAULT, false ) );
// Translations on X and Y axes are handled by the animation by applied on an external shape.
RC_TEST( iskeletalController->SetRootMotionPolicy( RED::RMC_POSITION_X, RED::RMP_DELTA, true ) );
RC_TEST( iskeletalController->SetRootMotionPolicy( RED::RMC_POSITION_Y, RED::RMP_DELTA, true ) );
// Translation on Z axis is handled externally.
RC_TEST( iskeletalController->SetRootMotionPolicy( RED::RMC_POSITION_Z, RED::RMP_ZERO, false ) );
 Filtering skeleton bones | Doing smooth transitions between skeletal animations |
