public override void Update(GameTime gameTime)
{
_debugRenderer.Clear();
if (_avatarPose == null)
{
// Must wait till renderer is ready. Before that we do not get skeleton info.
if (_avatarRenderer.State == AvatarRendererState.Ready)
{
// Create AvatarPose.
_avatarPose = new AvatarPose(_avatarRenderer);
// A 'bone transform' is the transformation of a bone relative to its bind pose.
// Bone transforms define the pose of a skeleton.
// Rotate arm of avatar.
SkeletonPose skeletonPose = _avatarPose.SkeletonPose;
int shoulderIndex = skeletonPose.Skeleton.GetIndex("ShoulderLeft");
skeletonPose.SetBoneTransform(shoulderIndex, new SrtTransform(QuaternionF.CreateRotationZ(-0.9f)));
// The class SkeletonHelper provides some useful extension methods.
// One is SetBoneRotationAbsolute() which sets the orientation of a bone relative
// to model space.
// Rotate elbow to make the lower arm point forward.
int elbowIndex = skeletonPose.Skeleton.GetIndex("ElbowLeft");
SkeletonHelper.SetBoneRotationAbsolute(skeletonPose, elbowIndex, QuaternionF.CreateRotationY(ConstantsF.PiOver2));
// Draw avatar skeleton for debugging.
_debugRenderer.DrawSkeleton(skeletonPose, _pose, Vector3F.One, 0.02f, Color.Orange, true);
}
}
}
public override void Update(GameTime gameTime)
{
base.Update(gameTime);
float deltaTime = (float)gameTime.ElapsedGameTime.TotalSeconds;
// Change rotation angle.
if (_moveArmDown)
{
_upperArmAngle -= 0.3f * deltaTime;
}
else
{
_upperArmAngle += 0.3f * deltaTime;
}
// Change direction when a certain angle is reached.
if (Math.Abs(_upperArmAngle) > 0.5f)
{
_moveArmDown = !_moveArmDown;
}
// Get the bone index of the upper arm bone.
var skeleton = _meshNode.Mesh.Skeleton;
int upperArmIndex = skeleton.GetIndex("L_UpperArm");
// Define the desired bone transform.
SrtTransform boneTransform = new SrtTransform(QuaternionF.CreateRotationY(_upperArmAngle));
// Set the new bone transform.
var skeletonPose = _meshNode.SkeletonPose;
skeletonPose.SetBoneTransform(upperArmIndex, boneTransform);
// The class SkeletonHelper provides some useful extension methods.
// One is SetBoneRotationAbsolute() which sets the orientation of a bone relative
// to model space.
int handIndex = skeleton.GetIndex("L_Hand");
SkeletonHelper.SetBoneRotationAbsolute(skeletonPose, handIndex, QuaternionF.CreateRotationX(ConstantsF.Pi));
}