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Gravity adjustments.

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This commit is contained in:
Andrzej Kapolka 2013-11-06 17:58:05 -08:00
parent 1ae8a211bb
commit be09d319b7
2 changed files with 14 additions and 13 deletions
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7
interface/src/avatar/Avatar.cpp
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@ -660,12 +660,13 @@ void Avatar::updateArmIKAndConstraints(float deltaTime, AvatarJointID fingerTipJ
float distance = glm::length(armVector);
// don't let right hand get dragged beyond maximum arm length...
if (distance > _maxArmLength) {
float armLength = _maxArmLength * 0.5f;
if (distance > armLength) {
// reset right hand to be constrained to maximum arm length
fingerJoint.position = shoulderJoint.position;
glm::vec3 armNormal = armVector / distance;
armVector = armNormal * _maxArmLength;
distance = _maxArmLength;
armVector = armNormal * armLength;
distance = armLength;
glm::vec3 constrainedPosition = shoulderJoint.position;
constrainedPosition += armVector;
fingerJoint.position = constrainedPosition;

20
interface/src/renderer/Model.cpp
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@ -616,16 +616,16 @@ bool Model::setJointPosition(int jointIndex, const glm::vec3& position) {
// this is a constraint relaxation algorithm: see
// http://www.ryanjuckett.com/programming/animation/22-constraint-relaxation-ik-in-2d
// start by optimistically setting the position of the end joint to our target
setJointTranslation(jointIndex, freeLineage.at(1), -1, relativePosition);
// the influence of gravity; lowers the potential energy of our configurations
glm::vec3 gravity = _rotation * IDENTITY_UP * -0.1f;
glm::vec3 gravity = _rotation * IDENTITY_UP * -0.01f;
// over one or more iterations, apply the length constraints and update the rotations accordingly
float uniformScale = (_scale.x + _scale.y + _scale.z) / 3.0f;
const int ITERATION_COUNT = 1;
const int ITERATION_COUNT = 3;
for (int i = 0; i < ITERATION_COUNT; i++) {
// start by optimistically setting the position of the end joint to our target
setJointTranslation(jointIndex, freeLineage.at(1), -1, relativePosition);
for (int j = 1; j < freeLineage.size(); j++) {
int sourceIndex = freeLineage.at(j);
int destIndex = freeLineage.at(j - 1);
@ -657,11 +657,11 @@ bool Model::setJointPosition(int jointIndex, const glm::vec3& position) {
destTranslation + boneVector * extension * 0.5f + gravity);
}
}
}
// now update the joint states from the top
for (int i = freeLineage.size() - 1; i >= 0; i--) {
updateJointState(freeLineage.at(i));
// now update the joint states from the top
for (int j = freeLineage.size() - 1; j >= 0; j--) {
updateJointState(freeLineage.at(j));
}
}
return true;