/// <summary>
/// Displays the axis handles.
/// </summary>
/// <param name="joint">Joint.</param>
/// <param name="bindpose">Bindpose.</param>
/// <returns><see langword="true"/> if the handles changed; otherwise, <see langword="false"/>.</returns>
public static bool DisplayAxisHandles(Joint joint, Matrix4x4 bindpose)
{
bool isChar = joint is CharacterJoint;
bool isConf = joint is ConfigurableJoint;
bool isHinge = joint is HingeJoint;
if (!isChar && !isConf && !isHinge)
{
return(false);
}
bool result = false;
Matrix4x4 oldMatrix = Handles.matrix;
Handles.matrix = (
joint.connectedBody == null ? Matrix4x4.identity : joint.connectedBody.transform.localToWorldMatrix
) * bindpose;
Vector3 ax1 = Vector3.forward;
Vector3 ax2 = Vector3.up;
if (isChar)
{
ax1 = (joint as CharacterJoint).axis;
ax2 = (joint as CharacterJoint).swingAxis;
}
else if (isConf)
{
ax1 = (joint as ConfigurableJoint).axis;
ax2 = (joint as ConfigurableJoint).secondaryAxis;
}
else if (isHinge)
{
ax1 = (joint as HingeJoint).axis;
}
Quaternion axisOrientation = Quaternion.LookRotation(ax1, ax2) * s_BindposeAxisHandleOffset;
if (SceneGUI.BeginHandles(joint, "Change Axes"))
{
axisOrientation = TransformHandles.Rotation(axisOrientation, Vector3.zero);
}
if (SceneGUI.EndHandles())
{
if (isChar)
{
(joint as CharacterJoint).axis = axisOrientation * s_PrimaryAxisHandleDirection;
(joint as CharacterJoint).swingAxis = axisOrientation * s_SecondaryAxisHandleDirection;
}
else if (isConf)
{
(joint as ConfigurableJoint).axis = axisOrientation * s_PrimaryAxisHandleDirection;
(joint as ConfigurableJoint).secondaryAxis = axisOrientation * s_SecondaryAxisHandleDirection;
}
else if (isHinge)
{
(joint as HingeJoint).axis = axisOrientation * s_PrimaryAxisHandleDirection;
}
result = true;
}
Handles.matrix = oldMatrix;
return(result);
}
