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polyTriangulate [-caching boolean] [-constructionHistory boolean] [-name string] [-nodeState int]

polyTriangulate is undoable, queryable, and editable.

Triangulation breaks polygons down into triangles, ensuring that all faces are planar and non-holed. Triangulation of models can be beneficial in many areas.

Return value

stringThe node name.

In query mode, return type is based on queried flag.


polyAppend, polyAppendVertex, polyBevel, polyChipOff, polyCreateFacet, polyExtrudeEdge, polyExtrudeFacet, polySmooth, polySplit, polySplitVertex, polySubdivideEdge, polySubdivideFacet


caching, constructionHistory, name, nodeState
Long name (short name) Argument types Properties
Common flags
-name(-n) string create
Give a name to the resulting node.
-constructionHistory(-ch) boolean createquery
Turn the construction history on or off (where applicable). If construction history is on then the corresponding node will be inserted into the history chain for the mesh. If construction history is off then the operation will be performed directly on the object.
Note: If the object already has construction history then this flag is ignored and the node will always be inserted into the history chain.
-caching(-cch) boolean createedit
Toggle caching for all attributes so that no recomputation is needed
-nodeState(-nds) int createqueryedit
Defines how to evaluate the node.
  • 0: Normal
  • 1: PassThrough
  • 2: Blocking
  • 3: Internally disabled. Will return to Normal state when enabled
  • 4: Internally disabled. Will return to PassThrough state when enabled
  • 5: Internally disabled. Will return to Blocking state when enabled

Flag can appear in Create mode of command Flag can appear in Edit mode of command
Flag can appear in Query mode of command Flag can be used more than once in a command.

MEL examples

// Non-planar faces
polyPlane -n plg1 -sx 5 -sy 5 -w 5 -h 5;
move -6 0 0;
polyMoveVertex -ltz 1 plg1.vtx[7] plg1.vtx[10] plg1.vtx[25] plg1.vtx[28];
polyTriangulate plg1.f[0:1] plg1.f[5:6] plg1.f[3:4] plg1.f[8:9]
    plg1.f[15:16] plg1.f[20:21] plg1.f[18:19] plg1.f[23:24] ;

// Holed faces
polyCreateFacet -p 2.5 0 2.5 -p 2.5 0 -2.5 -p -2.5 0 -2.5 -p -2.5 0 2.5
    -hl -p 1 0 -1 -p -1 0 -1 -p -1 0 1 -p 1 0 1 -n plg2;
polyTriangulate plg2.f[0];

// Both holed and non-planar facets
polyPlane -n plg3 -sx 3 -sy 3 -h 5 -w 5;
move 6 0 0;
polyChipOff -dup 1 -ltz 1 -ls .25 .25 .25 plg3.f[4];
polyMergeFacet -ch on -ff 4 -sf 9 plg3;
polyTriangulate plg3.f[4];