/* PMDObject::updateRootBone: update root bone if assigned to a base bone */
void PMDObject::updateRootBone()
{
btVector3 pos;
btVector3 posAbs;
PMDBone *b;
btTransform tr;
if (!m_baseBone) return;
/* relative position */
pos = m_offsetPos;
/* if absolute flag is true, fix relative position from root bone */
posAbs = m_offsetPos + m_origBasePos - m_baseBone->getTransform()->getOrigin();
if (m_absPosFlag[0]) pos.setX(posAbs.x());
if (m_absPosFlag[1]) pos.setY(posAbs.y());
if (m_absPosFlag[2]) pos.setZ(posAbs.z());
/* set root bone */
b = m_pmd.getRootBone();
b->setCurrentPosition(&pos);
b->setCurrentRotation(&m_offsetRot);
b->update();
/* update transform for base position */
tr = (*m_baseBone->getTransform()) * (*b->getTransform());
b->setTransform(&tr);
}
/* MotionManager::startMotionSub: initialize a motion */
void MotionManager::startMotionSub(VMD * vmd, MotionPlayer * m)
{
btVector3 offset;
PMDBone *centerBone;
btTransform tr;
btVector3 pos;
btVector3 centerPos;
btVector3 rootOffset;
/* initialize and setup motion controller */
m->mc.setup(m_pmd, vmd);
/* reset values */
m->mc.reset();
/* base motion does treat the bones with single motion frame at 0th frame as the same as normal bones */
m->mc.setIgnoreSingleMotion(m->ignoreStatic);
/* reset work area */
m->vmd = vmd;
m->active = true;
m->endingBoneBlend = 0.0f;
m->endingFaceBlend = 0.0f;
/* when motion is changed, speed acceleration is turned off */
m->accelerationStatusFlag = ACCELERATION_STATUS_CONSTANT;
/* set model offset */
if (m->enableSmooth) {
offset.setZero();
if (m->mc.hasCenter() && m->enableRePos) {
/* when the started motion has center motion, the center position of the model will be moved to the current position */
/* The current global position of the center bone will become the new offset of the root bone, and the local center position will be reset */
centerBone = m_pmd->getCenterBone();
/* calculate relative origin of center bone from model root bone */
tr = m_pmd->getRootBone()->getTransform()->inverse();
pos = tr * centerBone->getTransform()->getOrigin();
/* get the translation vector */
centerBone->getOriginPosition(¢erPos);
offset = pos - centerPos;
offset.setY(0.0f); /* Y axis should be set to zero to place model on ground */
/* save the current pos/rot for smooth motion changing, resetting center location */
m->mc.setOverrideFirst(&offset);
/* add the offset to the root bone */
m_pmd->getRootBone()->getOffset(&rootOffset);
rootOffset += offset;
m_pmd->getRootBone()->setOffset(&rootOffset);
m_pmd->getRootBone()->update();
} else {
/* save the current pos/rot for smooth motion changing */
m->mc.setOverrideFirst(NULL) ;
}
}
}