1!
2!     CalculiX - A 3-dimensional finite element program
3!              Copyright (C) 1998-2021 Guido Dhondt
4!
5!     This program is free software; you can redistribute it and/or
6!     modify it under the terms of the GNU General Public License as
7!     published by the Free Software Foundation(version 2);
8!
9!
10!     This program is distributed in the hope that it will be useful,
11!     but WITHOUT ANY WARRANTY; without even the implied warranty of
12!     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13!     GNU General Public License for more details.
14!
15!     You should have received a copy of the GNU General Public License
16!     along with this program; if not, write to the Free Software
17!     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18!
19      subroutine updatecont(koncont,ncont,co,vold,cg,straight,mi)
20!
21!     update geometric date of the contact master surface triangulation
22!
23      implicit none
24!
25      integer koncont(4,*),ncont,i,j,k,node,mi(*)
26!
27      real*8 co(3,*),vold(0:mi(2),*),cg(3,*),straight(16,*),col(3,3)
28!
29      do i=1,ncont
30         do j=1,3
31            node=koncont(j,i)
32            do k=1,3
33               col(k,j)=co(k,node)+vold(k,node)
34            enddo
35         enddo
36!
37!        center of gravity of the triangles
38!
39         do k=1,3
40            cg(k,i)=col(k,1)
41         enddo
42         do j=2,3
43            do k=1,3
44               cg(k,i)=cg(k,i)+col(k,j)
45            enddo
46         enddo
47         do k=1,3
48            cg(k,i)=cg(k,i)/3.d0
49         enddo
50!
51!        calculating the equation of the triangle plane and the planes
52!        perpendicular on it and through the triangle edges
53!
54         call straighteq3d(col,straight(1,i))
55!
56      enddo
57!
58      return
59      end
60