// Positioning the left hand on the gun after aiming has finished
private void FBBIK()
{
// Store the current rotation of the right hand
rightHandRotation = ik.references.rightHand.rotation;
// Offsetting hands, you might need that to support multiple weapons with the same aiming pose
Vector3 rightHandOffset = ik.references.rightHand.rotation * gunHoldOffset;
ik.solver.rightHandEffector.positionOffset += rightHandOffset;
if (recoil != null)
{
recoil.SetHandRotations(rightHandRotation * leftHandRotRelToRightHand, rightHandRotation);
}
// Update FBBIK
ik.solver.Update();
// Rotating the hand bones after IK has finished
// IK计算完之后再写入 recoil 的 IK计算
if (recoil != null)
{
ik.references.rightHand.rotation = recoil.rotationOffset * rightHandRotation;
ik.references.leftHand.rotation = recoil.rotationOffset * rightHandRotation * leftHandRotRelToRightHand;
}
else
{
ik.references.rightHand.rotation = rightHandRotation;
ik.references.leftHand.rotation = rightHandRotation * leftHandRotRelToRightHand;
}
}
private void LookDownTheSight()
{
float sW = aimWeight * sightWeight;
//if (sW <= 0f && recoil == null) return;
// Interpolate the gunTarget from the current animated position of the gun to the position fixed to the camera
gunTarget.position = Vector3.Lerp(gun.position, gunTarget.parent.TransformPoint(gunTargetDefaultLocalPosition), sW);
gunTarget.rotation = Quaternion.Lerp(gun.rotation, gunTarget.parent.rotation * gunTargetDefaultLocalRotation, sW);
// Get the current positions of the hands relative to the gun
Vector3 leftHandRelativePosition = gun.InverseTransformPoint(ik.solver.leftHandEffector.bone.position);
Vector3 rightHandRelativePosition = gun.InverseTransformPoint(ik.solver.rightHandEffector.bone.position);
// Get the current rotations of the hands relative to the gun
Quaternion leftHandRelativeRotation = Quaternion.Inverse(gun.rotation) * ik.solver.leftHandEffector.bone.rotation;
Quaternion rightHandRelativeRotation = Quaternion.Inverse(gun.rotation) * ik.solver.rightHandEffector.bone.rotation;
// Position the hands to the gun target the same way they are positioned on the gun
//ik.solver.leftHandEffector.position = gunTarget.TransformPoint(leftHandRelativePosition);
//ik.solver.rightHandEffector.position = gunTarget.TransformPoint(rightHandRelativePosition);
//float handWeight = aimWeight > 0 && sightWeight > 0? aimWeight * sightWeight: 0f;
float handWeight = 1f; //aimWeight * sightWeight;
ik.solver.leftHandEffector.positionOffset += (gunTarget.TransformPoint(leftHandRelativePosition) - (ik.solver.leftHandEffector.bone.position + ik.solver.leftHandEffector.positionOffset)) * handWeight;
ik.solver.rightHandEffector.positionOffset += (gunTarget.TransformPoint(rightHandRelativePosition) - (ik.solver.rightHandEffector.bone.position + ik.solver.rightHandEffector.positionOffset)) * handWeight;
// Make sure the head does not rotate
ik.solver.headMapping.maintainRotationWeight = 1f;
if (recoil != null)
{
recoil.SetHandRotations(gunTarget.rotation * leftHandRelativeRotation, gunTarget.rotation * rightHandRelativeRotation);
}
// Update FBBIK
ik.solver.Update();
// Rotate the hand bones relative to the gun target the same way they are rotated relative to the gun
if (recoil != null)
{
ik.references.leftHand.rotation = recoil.rotationOffset * (gunTarget.rotation * leftHandRelativeRotation);
ik.references.rightHand.rotation = recoil.rotationOffset * (gunTarget.rotation * rightHandRelativeRotation);
}
else
{
ik.references.leftHand.rotation = gunTarget.rotation * leftHandRelativeRotation;
ik.references.rightHand.rotation = gunTarget.rotation * rightHandRelativeRotation;
}
// Position the camera to where it was before FBBIK relative to the gun
cam.transform.position = Vector3.Lerp(cam.transform.position, Vector3.Lerp(gunTarget.TransformPoint(camRelativeToGunTarget), gun.transform.TransformPoint(camRelativeToGunTarget), cameraRecoilWeight), sW);
}