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199 lines
6.3 KiB
199 lines
6.3 KiB
2 years ago
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C Copyright(C) 1999-2020 National Technology & Engineering Solutions
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C of Sandia, LLC (NTESS). Under the terms of Contract DE-NA0003525 with
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C NTESS, the U.S. Government retains certain rights in this software.
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C
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C See packages/seacas/LICENSE for details
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C=======================================================================
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subroutine snpnod(numnp, ndim, x, y, z,
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* vnorm, neesss, nnesss, ltness,
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* plane, neessm, nnessm, ltnesm,
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* toler, delmax)
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C=======================================================================
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REAL X(*), Y(*), Z(*), VNORM(3,*), PLANE(4,*)
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DIMENSION LTNESS(4,*), LTNESM(4,*)
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REAL PI(3)
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REAL SAVEIT(3)
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LOGICAL FOUND
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glotol = 0.0
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notmat = 0
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matin = 0
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mattol = 0
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numnod = 0
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dmax = 0.0
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delmx2 = delmax**2
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svdel = 0.0
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saveit(1) = 0.0
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saveit(2) = 0.0
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saveit(3) = 0.0
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do 130 inod = 1, numnp
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armax = -1.0e38
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svmax = -1.0e38
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found = .false.
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if (vnorm(1,inod) .ne. 0.0 .or. vnorm(2,inod) .ne. 0.0 .or.
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* vnorm(3,inod) .ne. 0.0) then
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numnod = numnod + 1
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X0 = X(inod)
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Y0 = Y(inod)
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Z0 = Z(inod)
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AI = VNORM(1, inod)
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BJ = VNORM(2, inod)
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CK = VNORM(3, inod)
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do 110 ifac = 1, neessm
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A = plane(1,ifac)
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B = plane(2,ifac)
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C = plane(3,ifac)
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D = plane(4,ifac)
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C ... If denom == 0, then node normal is parallel to plane
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DENOM = A*AI + B*BJ + C*CK
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if (denom .ne. 0.0) then
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T = -(A*X0 + B*Y0 + C*Z0 - D) / DENOM
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C ... Intersection point
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PI(1) = X0 + T * AI
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PI(2) = Y0 + T * BJ
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PI(3) = Z0 + T * CK
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dx = abs(x(inod)-pi(1))
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if (dx .gt. delmax) go to 100
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dy = abs(y(inod)-pi(2))
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if (dy .gt. delmax) go to 100
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dz = abs(z(inod)-pi(3))
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if (dz .gt. delmax) go to 100
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delta2 = dx**2 + dy**2 + dz**2
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if (delta2 .le. delmx2) then
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C ... See if intersection point is inside face.
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XI = X(LTNESM(1,IFAC))
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YI = Y(LTNESM(1,IFAC))
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ZI = Z(LTNESM(1,IFAC))
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XJ = X(LTNESM(2,IFAC))
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YJ = Y(LTNESM(2,IFAC))
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ZJ = Z(LTNESM(2,IFAC))
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XK = X(LTNESM(3,IFAC))
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YK = Y(LTNESM(3,IFAC))
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ZK = Z(LTNESM(3,IFAC))
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XL = X(LTNESM(4,IFAC))
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YL = Y(LTNESM(4,IFAC))
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ZL = Z(LTNESM(4,IFAC))
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area1 = trarea(xi, yi, zi, xj, yj, zj,
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* pi(1), pi(2), pi(3),
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* plane(1,ifac))
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area2 = trarea(xj, yj, zj, xk, yk, zk,
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* pi(1), pi(2), pi(3),
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* plane(1,ifac))
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area3 = trarea(xk, yk, zk, xl, yl, zl,
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* pi(1), pi(2), pi(3),
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* plane(1,ifac))
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area4 = trarea(xl, yl, zl, xi, yi, zi,
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* pi(1), pi(2), pi(3),
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* plane(1,ifac))
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if (area1 .ge. 0.0 .and. area2 .ge. 0.0 .and.
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* area3 .ge. 0.0 .and. area4 .ge. 0.0) then
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C ... If we made it this far, then the intersection point is inside the
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C face. Move the node to the intersection point and get the next node
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X(INOD) = PI(1)
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Y(INOD) = PI(2)
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Z(INOD) = PI(3)
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dmax = max(delta2, dmax)
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matin = matin + 1
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go to 120
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else if (area1 .ge. -toler .and. area2 .ge. -toler .and.
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* area3 .ge. -toler .and. area4 .ge. -toler) then
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C ... If we made it this far, then the intersection point is slightly
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C outside the face, but is within tolerance. Save this intersection
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C point in case no intersections within the face are found.
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C ... Want largest negative
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armin = MIN(area1, area2, area3, area4)
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C ... NOTE: armin < 0, want closest to zero.
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if (armin .gt. svmax) then
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found = .TRUE.
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svmax = armin
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svdel = delta2
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SAVEIT(1) = PI(1)
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SAVEIT(2) = PI(2)
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SAVEIT(3) = PI(3)
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end if
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else
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C ... The node is outside the tolerance, find the most negative of the area*
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C for this face/node combination. Save the maximum (closest to zero)
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C for all face/node combinations.
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armin = MIN(area1, area2, area3, area4)
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armax = MAX(armin, armax)
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end if
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end if
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end if
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100 continue
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110 continue
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if (found) then
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x(inod) = saveit(1)
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y(inod) = saveit(2)
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z(inod) = saveit(3)
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dmax = max(svdel, dmax)
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mattol = mattol + 1
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else
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write (*,10000) inod, -armax
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glotol = MAX(glotol, -armax)
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notmat = notmat + 1
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end if
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end if
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120 continue
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130 continue
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if (notmat .gt. 0) then
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write (*,10010) notmat, glotol
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end if
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write (*, 10020) sqrt(dmax), numnod, matin, mattol
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10000 format('WARNING - No matching face found for node ',i9,/,
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* ' Tolerance must be at least ',1pe11.4,
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* ' to detect a match.')
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10010 format(/,'WARNING - ',I9,' nodes were not matched.',/,
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* 'Set tolerance greater than ',1pe11.4,' to match all nodes.')
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10020 format(/,'Maximum node movement = ',1pe11.4,
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* /,'Number of unique slave nodes = ',I9,
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* /,'Number of exact matches = ',I9,
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* /,'Number of toleranced matches = ',I9 )
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return
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end
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real function trarea(A1, A2, A3, B1, B2, B3, C1, C2, C3,
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* RNORM)
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real sum(3), rnorm(3)
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sum(1) = A2*B3 - A3*B2
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sum(2) = A3*B1 - A1*B3
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sum(3) = A1*B2 - A2*B1
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sum(1) = sum(1) + B2*C3 - B3*C2
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sum(2) = sum(2) + B3*C1 - B1*C3
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sum(3) = sum(3) + B1*C2 - B2*C1
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sum(1) = sum(1) + C2*A3 - C3*A2
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sum(2) = sum(2) + C3*A1 - C1*A3
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sum(3) = sum(3) + C1*A2 - C2*A1
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trarea = sum(1)*rnorm(1) + sum(2)*rnorm(2) + sum(3)*rnorm(3)
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return
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end
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