I need to create test file for my program. But it only accepts polygons with 3 vertices - triangles as input. How can I convert all polygons of some object into triangles?
I know how to select all faces, but how to split them into triangles.
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$\begingroup$ more answers to the same question here: blender.stackexchange.com/questions/30846/… $\endgroup$– user1853May 14, 2015 at 17:18
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2 Answers
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You can select all the faces and go to Face > Triangulate Faces in the 3D View header (or just press Ctrl+T for the same effect) while in Edit Mode.
As ideasman42 pointed out in the comments, Face > Poke Faces will also triangulate the mesh by adding a vertex in the center of each face and fan-filling around the vertex, it may give preferred results for certain cases, for example, cylinder caps.
You could also add a 'Triangulate' modifier to the object and apply it:
Visualisation of the two methods:
answered Nov 26, 2014 at 15:33
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4$\begingroup$ One other method,
Mesh -> Faces -> Poke Faces, maybe worth adding to answer. $\endgroup$ Nov 26, 2014 at 15:40 -
$\begingroup$ @ideasman42 How does Poke Faces actually differ from triangulation? What else does it do? $\endgroup$ Nov 26, 2014 at 23:50
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$\begingroup$ edited answer explaining what poke-faces does, $\endgroup$ Nov 27, 2014 at 0:04
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$\begingroup$ Another method would be:
Mesh -> Clean up -> Split Non-Planar Faces, then set Max angle to0. $\endgroup$ Nov 27, 2014 at 14:22
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There is also an easy way to do it through Blender's Python API:
bpy.ops.mesh.quads_convert_to_tris(quad_method='FIXED', ngon_method='BEAUTY') #if you want a faster way
or
bpy.ops.mesh.quads_convert_to_tris(quad_method='BEAUTY', ngon_method='BEAUTY') #If you want nicer cuts
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1$\begingroup$ Is there a way to do this without
bpy.opsso the context doesn't matter? (given the object whose mesh should be triangulated) $\endgroup$– NathanJan 21, 2020 at 21:49