Describes all you could possibly want to know about a tetrahedron

Format

Helpful Information for the Output

• The four mass points (itet values) of the tet. (i1-i4)
• The position of the opposite points of i1-14 in the jtet array (j1-j4)
• The connectivity of the tet. (in order of appearance)
• 1. face index of the specified point (It(1) <==> i1)
• 2. tet. number containing the specified point
• 3. face index of the opposite tet. (Jt(face index))
• 4. number of the opposite tet.
• 5. indexes of the generic tet. (i,j,k,l)
• 6. index of the opposite vertex associated with the j-k-l face of the generic tet. (m). (j,k,l,m)=>opposite tet.
• Other values
• Vol = volume of tet.
• Dvol,T0,Dt0 = ?
• (xm,ym,zm) = centroid of tet.
• (x123,y123,z123) = centroid of face 123 (i1,i2,i3)
• A1-A4 = twice the area of the face opposite the point. (e.g. A1=2 x the area of face 234 (i2,i3,i4))
• Connections between points
• ds = distance between two points
• A = area of median mesh between two points
• Ap = ?
• (xa,ya,za) = vector normal to area A (1/2 magnitude)
• v1-v4 = partial volume of the tet. associated with two points (1/12 of the actual tet volume)