<?xml version="1.0"?>

<scene>
  <Group>
    <TriangleMesh>
      <positions>
        -20 0 -20
        -20 0 +20
        +20 0 +20
        +20 0 -20
      </positions>
      <triangles>
        0 2 1
        0 3 2
      </triangles>
      <material>
        <code>"OBJ"</code>
        <parameters>
          <float3 name="Kd">1 1 1</float3>
        </parameters>
      </material>
    </TriangleMesh>

    <LineSegments>

      <positions>
<!--
        0 0 0 0.5
        0 5 0 1
        5 5 0 2
        5 0 0 1
-->

<!--
        0 0 0 1
        0 5 0 1
        5 5 0 1
        5 0 0 0 
        0 5 0 1
        0 5 0 0
-->

        0 -4 0 0.02
        0 0 0 0.02
        0 5 0 1
        5 5 0 1
        5 5 5 1 
        5 10 5 2
        5 10 3 0

      </positions>

      <indices>
        0 1 2 3 4 5
      </indices>

      <material>
        <code>"OBJ"</code>
        <parameters>
          <float3 name="Kd">1 1 1</float3>
        </parameters>
      </material>

    </LineSegments>
  </Group>
</scene>
