#usda 1.0
(
    startTimeCode = 1
    endTimeCode = 10
    upAxis = "Z"
)
def SkelRoot "Model"(
    prepend apiSchemas = ["SkelBindingAPI"]
) 
{
    def Skeleton "Skel"(
        prepend apiSchemas = ["SkelBindingAPI"]
    )
    {
        uniform token[] joints = ["Shoulder", "Shoulder/Elbow", "Shoulder/Elbow/Hand"]
        uniform matrix4d[] bindTransforms = [
            ((1,0,0,0),(0,1,0,0),(0,0,1,0),(0,0,0,1)),
            ((1,0,0,0),(0,1,0,0),(0,0,1,0),(0,0,2,1)),
            ((1,0,0,0),(0,1,0,0),(0,0,1,0),(0,0,4,1))
        ]
        uniform matrix4d[] restTransforms = [
            ((1,0,0,0),(0,1,0,0),(0,0,1,0),(0,0,0,1)),
            ((1,0,0,0),(0,1,0,0),(0,0,1,0),(0,0,2,1)),
            ((1,0,0,0),(0,1,0,0),(0,0,1,0),(0,0,2,1))
        ]
        def SkelAnimation "Anim1" {
            uniform token[] joints = ["Shoulder/Elbow"]
        
            float3[] translations = [(0,0,2)]
            quatf[] rotations.timeSamples = {
                1: [(1,0,0,0)],
                10: [(0.7071, 0.7071, 0, 0)]
            }
            half3[] scales = [(1,1,1)]
        }
        
        rel skel:animationSource = <Anim1>
    }
    rel skel:skeleton = </Model/Skel>

    def Mesh "Arm"(
        prepend apiSchemas = ["SkelBindingAPI"]
    )
    {
        int[] faceVertexCounts = [4, 4, 4, 4, 4, 4, 4, 4, 4, 4]
        int[] faceVertexIndices = [
            2, 3, 1, 0,
            6, 7, 5, 4,
            8, 9, 7, 6,
            3, 2, 9, 8,
            10, 11, 4, 5,
            0, 1, 11, 10,
            7, 9, 10, 5,
            9, 2, 0, 10,
            3, 8, 11, 1,
            8, 6, 4, 11
        ]
        point3f[] points = [
            (0.5, -0.5, 4), (-0.5, -0.5, 4), (0.5, 0.5, 4), (-0.5, 0.5, 4),
            (-0.5, -0.5, 0), (0.5, -0.5, 0), (-0.5, 0.5, 0), (0.5, 0.5, 0),
            (-0.5, 0.5, 2), (0.5, 0.5, 2), (0.5, -0.5, 2), (-0.5, -0.5, 2)
        ]
        float3[] primvars:displayColor = [(0.5, 0.5, 0.5)] (
            interpolation = "constant"
        )
        float[] primvars:displayOpacity = [1.0] (
            interpolation = "constant"
        )

        int[] primvars:skel:jointIndices = [
            2,2,2,2, 0,0,0,0, 1,1,1,1
        ] (
            interpolation = "vertex"
            elementSize = 1
        )
        float[] primvars:skel:jointWeights = [
            1,1,1,1, 1,1,1,1, 1,1,1,1
            ] (
            interpolation = "vertex"
            elementSize = 1
        )
        matrix4d primvars:skel:geomBindTransform = ((1,0,0,0),(0,1,0,0),(0,0,1,0),(0,0,0,1))

        # Baking the extents so the prim isn't clipped due to skinning.
        float3[] extent = [(-1, -2, -1), (1, 2, 1)]
    }

    # While we can view the mesh as points (via the shading mode), this is to
    # test if the points prim can be skinned.
    def Points "ArmPoints"(
        prepend apiSchemas = ["SkelBindingAPI"]
    )
    {
 
        point3f[] points = [
            (0.5, -0.5, 4), (-0.5, -0.5, 4), (0.5, 0.5, 4), (-0.5, 0.5, 4),
            (-0.5, -0.5, 0), (0.5, -0.5, 0), (-0.5, 0.5, 0), (0.5, 0.5, 0),
            (-0.5, 0.5, 2), (0.5, 0.5, 2), (0.5, -0.5, 2), (-0.5, -0.5, 2)
        ]
        float[] widths = [0.1] (
            interpolation = "constant"
        )
        float3[] primvars:displayColor = [(0.5, 0.0, 0.0)] (
            interpolation = "constant"
        )

        int[] primvars:skel:jointIndices = [
            2,2,2,2, 0,0,0,0, 1,1,1,1
        ] (
            interpolation = "vertex"
            elementSize = 1
        )
        float[] primvars:skel:jointWeights = [
            1,1,1,1, 1,1,1,1, 1,1,1,1
            ] (
            interpolation = "vertex"
            elementSize = 1
        )
        # translate by 2.0 units on the X-axis.
        matrix4d primvars:skel:geomBindTransform = ((1,0,0,0),(0,1,0,0),(0,0,1,0),(2,0,0,1))
    }
}