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Merge pull request #9820 from Atlante45/fix/avatar-lean

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Fix avatar lean
This commit is contained in:
Andrew Meadows 2017-03-06 22:18:34 -08:00 committed by GitHub
commit 8c773483cf
1 changed files with 17 additions and 31 deletions
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48
libraries/animation/src/AnimInverseKinematics.cpp
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@ -488,13 +488,7 @@ const AnimPoseVec& AnimInverseKinematics::overlay(const AnimVariantMap& animVars
// measure new _hipsOffset for next frame
// by looking for discrepancies between where a targeted endEffector is
// and where it wants to be (after IK solutions are done)
// use weighted average between HMD and other targets
float HMD_WEIGHT = 10.0f;
float OTHER_WEIGHT = 1.0f;
float totalWeight = 0.0f;
glm::vec3 additionalHipsOffset = Vectors::ZERO;
glm::vec3 newHipsOffset = Vectors::ZERO;
for (auto& target: targets) {
int targetIndex = target.getIndex();
if (targetIndex == _headIndex && _headIndex != -1) {
@ -505,42 +499,34 @@ const AnimPoseVec& AnimInverseKinematics::overlay(const AnimVariantMap& animVars
glm::vec3 under = _skeleton->getAbsolutePose(_headIndex, underPoses).trans();
glm::vec3 actual = _skeleton->getAbsolutePose(_headIndex, _relativePoses).trans();
const float HEAD_OFFSET_SLAVE_FACTOR = 0.65f;
additionalHipsOffset += (OTHER_WEIGHT * HEAD_OFFSET_SLAVE_FACTOR) * (under- actual);
totalWeight += OTHER_WEIGHT;
newHipsOffset += HEAD_OFFSET_SLAVE_FACTOR * (actual - under);
} else if (target.getType() == IKTarget::Type::HmdHead) {
// we want to shift the hips to bring the head to its designated position
glm::vec3 actual = _skeleton->getAbsolutePose(_headIndex, _relativePoses).trans();
glm::vec3 thisOffset = target.getTranslation() - actual;
glm::vec3 futureHipsOffset = _hipsOffset + thisOffset;
if (glm::length(glm::vec2(futureHipsOffset.x, futureHipsOffset.z)) < _maxHipsOffsetLength) {
// it is imperative to shift the hips and bring the head to its designated position
// so we slam newHipsOffset here and ignore all other targets
additionalHipsOffset = futureHipsOffset - _hipsOffset;
totalWeight = 0.0f;
break;
} else {
additionalHipsOffset += HMD_WEIGHT * (target.getTranslation() - actual);
totalWeight += HMD_WEIGHT;
}
_hipsOffset += target.getTranslation() - actual;
// and ignore all other targets
newHipsOffset = _hipsOffset;
break;
} else if (target.getType() == IKTarget::Type::RotationAndPosition) {
glm::vec3 actualPosition = _skeleton->getAbsolutePose(targetIndex, _relativePoses).trans();
glm::vec3 targetPosition = target.getTranslation();
newHipsOffset += targetPosition - actualPosition;
// Add downward pressure on the hips
newHipsOffset *= 0.95f;
newHipsOffset -= 1.0f;
}
} else if (target.getType() == IKTarget::Type::RotationAndPosition) {
glm::vec3 actualPosition = _skeleton->getAbsolutePose(targetIndex, _relativePoses).trans();
glm::vec3 targetPosition = target.getTranslation();
additionalHipsOffset += OTHER_WEIGHT * (targetPosition - actualPosition);
totalWeight += OTHER_WEIGHT;
newHipsOffset += targetPosition - actualPosition;
}
}
if (totalWeight > 1.0f) {
additionalHipsOffset /= totalWeight;
}
// Add downward pressure on the hips
additionalHipsOffset *= 0.95f;
additionalHipsOffset -= 1.0f;
// smooth transitions by relaxing _hipsOffset toward the new value
const float HIPS_OFFSET_SLAVE_TIMESCALE = 0.10f;
float tau = dt < HIPS_OFFSET_SLAVE_TIMESCALE ? dt / HIPS_OFFSET_SLAVE_TIMESCALE : 1.0f;
_hipsOffset += additionalHipsOffset * tau;
_hipsOffset += (newHipsOffset - _hipsOffset) * tau;
// clamp the hips offset
float hipsOffsetLength = glm::length(_hipsOffset);