How to get interpolated normal of triangle?

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I have this 3D Triangle of which I want to get the interpolated normal of V3.



I know how to get the normal per triangle face, but I don't know how to get to interpolated normal.



3D Triangle



I would calculate cross(v4-v1, v2-v1), but that would give me only the normal for the whole face.



Can you help?




geometry computer-vision




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    up vote
    0
    down vote

    favorite












    I have this 3D Triangle of which I want to get the interpolated normal of V3.



    I know how to get the normal per triangle face, but I don't know how to get to interpolated normal.



    3D Triangle



    I would calculate cross(v4-v1, v2-v1), but that would give me only the normal for the whole face.



    Can you help?




    geometry computer-vision




    share|cite|improve this question





















      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I have this 3D Triangle of which I want to get the interpolated normal of V3.



      I know how to get the normal per triangle face, but I don't know how to get to interpolated normal.



      3D Triangle



      I would calculate cross(v4-v1, v2-v1), but that would give me only the normal for the whole face.



      Can you help?




      geometry computer-vision




      share|cite|improve this question











      I have this 3D Triangle of which I want to get the interpolated normal of V3.



      I know how to get the normal per triangle face, but I don't know how to get to interpolated normal.



      3D Triangle



      I would calculate cross(v4-v1, v2-v1), but that would give me only the normal for the whole face.



      Can you help?





      geometry computer-vision





      share|cite|improve this question










      share|cite|improve this question




      share|cite|improve this question









      asked Jul 30 at 12:33









      Saphire

      1313




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          I suspect you are looking for the vertex normal. As stated in the link, it is the normalized average of the surface normals of the faces that contain that vertex.






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            1 Answer
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            up vote
            0
            down vote













            I suspect you are looking for the vertex normal. As stated in the link, it is the normalized average of the surface normals of the faces that contain that vertex.






            share|cite|improve this answer

























              up vote
              0
              down vote













              I suspect you are looking for the vertex normal. As stated in the link, it is the normalized average of the surface normals of the faces that contain that vertex.






              share|cite|improve this answer























                up vote
                0
                down vote










                up vote
                0
                down vote









                I suspect you are looking for the vertex normal. As stated in the link, it is the normalized average of the surface normals of the faces that contain that vertex.






                share|cite|improve this answer













                I suspect you are looking for the vertex normal. As stated in the link, it is the normalized average of the surface normals of the faces that contain that vertex.







                share|cite|improve this answer













                share|cite|improve this answer



                share|cite|improve this answer











                answered Jul 30 at 17:15









                Jens

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