<?xml version="1.0"?>
<scene>
  <Group>
    <Points type="sphere">
      <animated_positions>
        <positions>
          -3 3 0 0.75
          -1 3 0 0.75
          +1 3 0 0.75
          +3 3 0 0.75
        </positions>
        <positions>
          -3 3 1 0.1
          -1 3 1 0.1
          +1 3 1 0.75
          +3 3 1 0.75
        </positions>
      </animated_positions>
      <material>
        <code>"OBJ"</code>
        <parameters>
          <float3 name="Kd">1 1 1</float3>
        </parameters>
      </material>
    </Points>
    <Points type="disc">
      <animated_positions>
      <positions>
        -3 1 0 0.75
        -1 1 0 0.75
        +1 1 0 0.75
        +3 1 0 0.75
      </positions>
      <positions>
        -3 1 1 0.75
        -1 1 1 0.75
        +1 1 1 0.1
        +3 1 1 0.1
      </positions>
      </animated_positions>
      <material>
        <code>"OBJ"</code>
        <parameters>
          <float3 name="Kd">1 1 1</float3>
        </parameters>
      </material>
    </Points>
    <Points type="oriented">
      <animated_positions>
        <positions>
          -3 -1 0 0.1
          -1 -1 0 0.75
          +1 -1 0 0.75
          +3 -1 0 0.75
        </positions>
        <positions>
          -3 -1 1 0.75
          -1 -1 1 0.1
          +1 -1 1 0.75
          +3 -1 0 0.75
        </positions>
      </animated_positions>
      <animated_normals>
        <normals>
         1.0 0 -1
         0.5 0 -1
        -0.5 0 -1
        -1.0 0 -1
        </normals>
        <normals>
          1.0 0 -1
          0.5 0 -1
        -1.0 0 -1
        -0.5 0 -1
        </normals>
      </animated_normals>
      <material>
        <code>"OBJ"</code>
        <parameters>
          <float3 name="Kd">1 1 1</float3>
        </parameters>
      </material>
    </Points>
    <Points type="oriented">
      <animated_positions>
        <positions>
          -3 -3 0 0.75
          -1 -3 0 0.75
          +1 -3 0 0.75
          +3 -3 0 0.75
        </positions>
        <positions>
          -3 -3 0 0.25
          -1 -3 0 0.25
          +1 -3 0 0.25
          +3 -3 0 0.25
        </positions>
        <!-- currently buggy
        <positions>
          -3 -3 0 0.75
          -1 -3 0 0.75
          +1 -3 0 0.75
          +3 -3 0 0.75
        </positions>
        -->
      </animated_positions>
      <animated_normals>
        <normals>
          0 0 -1
          0 0 -1
          -1 0 -1
           1 0 -1
        </normals>
        <normals>
          -1 0 -1
           1 0 -1
          0 0 -1
          0 0 -1
        </normals>
        <!--
        <normals>
          -1 0 0
          -1 0 0
          -1 0 0
          -1 0 0
        </normals>
        -->
      </animated_normals>
      <material>
        <code>"OBJ"</code>
        <parameters>
          <float3 name="Kd">1 1 1</float3>
        </parameters>
      </material>
    </Points>
  </Group>
</scene>
