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      1 GEOM
      2 PROPERTY GS_INPUT_PRIMITIVE TRIANGLES
      3 PROPERTY GS_OUTPUT_PRIMITIVE LINE_STRIP
      4 PROPERTY GS_MAX_OUTPUT_VERTICES 4
      5 DCL IN[][0], POSITION, CONSTANT
      6 DCL IN[][1], COLOR, CONSTANT
      7 DCL OUT[0], POSITION, CONSTANT
      8 DCL OUT[1], COLOR, CONSTANT
      9 
     10 MOV OUT[0], IN[0][0]
     11 MOV OUT[1], IN[0][1]
     12 EMIT
     13 
     14 MOV OUT[0], IN[1][0]
     15 MOV OUT[1], IN[0][1]
     16 EMIT
     17 
     18 MOV OUT[0], IN[2][0]
     19 MOV OUT[1], IN[2][1]
     20 EMIT
     21 
     22 MOV OUT[0], IN[0][0]
     23 MOV OUT[1], IN[0][1]
     24 EMIT
     25 
     26 ENDPRIM
     27 
     28 END
     29