You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
236 lines
7.3 KiB
236 lines
7.3 KiB
C Copyright(C) 1999-2020 National Technology & Engineering Solutions
|
|
C of Sandia, LLC (NTESS). Under the terms of Contract DE-NA0003525 with
|
|
C NTESS, the U.S. Government retains certain rights in this software.
|
|
C
|
|
C See packages/seacas/LICENSE for details
|
|
|
|
SUBROUTINE QADSRC(
|
|
* NDIM, NPTS, NPSRF, NFSRF, NISR,
|
|
* NRSR, NRSS, XYZE, XYZP, LS,
|
|
* ISRCHR, RSRCHR, IPT, IELT, IERR )
|
|
|
|
C-----------------------------------------------------------------------
|
|
|
|
C DESCRIPTION:
|
|
|
|
C THIS SUBROUTINE CALCULATES THE CLOSEST POINT PROBLEM
|
|
C BETWEEN 'KOUNTS' PAIRS OF POINTS AND SURFACES.
|
|
|
|
C-----------------------------------------------------------------------
|
|
|
|
C FORMAL PARAMETERS
|
|
|
|
C MEMORY : P=PERMANENT, S=SCRATCH
|
|
C NAME : IMPLICIT A-H,O-Z REAL, I-N INTEGER
|
|
C TYPE : INPUT_STATUS/OUTPUT_STATUS (I=INPUT,O=OUTPUT,P=PASSED,
|
|
C U=UNMODIFIED,-=UNDEFINED)
|
|
C DESCRIPTION : DESCRIPTION OF VARIABLE
|
|
|
|
C-----------------------------------------------------------------------
|
|
|
|
C CALLING ARGUMENTS
|
|
|
|
C MEMORY NAME TYPE DESCRIPTION
|
|
C --- ---- --- -----------
|
|
C P NDIM I/U DIMENSION OF PROBLEM=3
|
|
C P NPTS I/U NUMBER OF POINTS TO BE SEARCHED
|
|
C P NPSRF I/U NUMBER OF POINTS THAT DEFINE THE SURFACE
|
|
C P NFSRF I/U NUMBER OF SURFACES
|
|
C P NISR I/U NUMBER OF INTEGER SEARCH RESULTS (>=1)
|
|
C P NRSR I/U NUMBER OF REAL SEARCH RESULTS (>=4)
|
|
C P NRSS I/U NUMBER OF REAL SEARCH SCRATCH MEMORY (=10)
|
|
C P XYZE I/U XYZ COORDS OF POINTS DEFINING ELEMENT
|
|
C P XYZP I/U XYZ COORDS OF POINTS TO BE SEARCHED
|
|
C P LS I/U CONNECTIVITY OF ELEMENTS (4*NFSRF),
|
|
C NUMBERS REFER TO LOCATIONS IN XYZE ARRAY
|
|
C P ISRCHR I/O INTEGER SEARCH RESULTS
|
|
C P RSRCHR I/O REAL SEARCH RESULTS
|
|
C P IPT I/U POINT PAIRED WITH SURFACE LISTED IN IELT
|
|
C P IELT I/U SURFACE PAIRED WITH POINT LISTED IN IPT
|
|
|
|
C-----------------------------------------------------------------------
|
|
|
|
include 'amesh.blk'
|
|
include 'ebbyeb.blk'
|
|
include 'toldat.blk'
|
|
include 'tapes.blk'
|
|
|
|
C INPUT/OUTPUT ARRAYS
|
|
DIMENSION
|
|
* XYZP(NPTS,NDIM) ,XYZE(NPSRF,NDIM) ,LS(NELNDA,NFSRF) ,
|
|
* ISRCHR(NISR,NPTS) ,RSRCHR(NRSR,NPTS)
|
|
DIMENSION XX(27), YY(27), ZZ(27)
|
|
|
|
IF( NISR .LT. 1 .OR. NRSR .LT. 3 .OR. NRSS .LT. 10 )THEN
|
|
IERR = 1
|
|
RETURN
|
|
ENDIF
|
|
|
|
C check for Mesh-B point coincident with node of element in Mesh-A
|
|
|
|
SIDE1 = (XYZE(LS(1,IELT),1)-XYZE(LS(2,IELT),1))**2
|
|
& + (XYZE(LS(1,IELT),2)-XYZE(LS(2,IELT),2))**2
|
|
SIDE2 = (XYZE(LS(2,IELT),1)-XYZE(LS(3,IELT),1))**2
|
|
& + (XYZE(LS(2,IELT),2)-XYZE(LS(3,IELT),2))**2
|
|
SIDE3 = (XYZE(LS(3,IELT),1)-XYZE(LS(4,IELT),1))**2
|
|
& + (XYZE(LS(3,IELT),2)-XYZE(LS(4,IELT),2))**2
|
|
SIDE4 = (XYZE(LS(4,IELT),1)-XYZE(LS(1,IELT),1))**2
|
|
& + (XYZE(LS(4,IELT),2)-XYZE(LS(1,IELT),2))**2
|
|
SIDMIN = MIN(SIDE1,SIDE2,SIDE3,SIDE4)
|
|
SIDMAX = MAX(SIDE1,SIDE2,SIDE3,SIDE4)
|
|
COTEST = EPS*EPS*SIDMIN
|
|
DO 110 I = 1, 4
|
|
A = XYZE(LS(I,IELT),1) - XYZP(IPT,1)
|
|
B = XYZE(LS(I,IELT),2) - XYZP(IPT,2)
|
|
DIST = A**2+B**2
|
|
IF (DIST .LT. COTEST)THEN
|
|
|
|
C coincident node, so fill search results arrays
|
|
C no need to check for better search result
|
|
|
|
INODE = I
|
|
ISRCHR(1,IPT) = IELT
|
|
CALL NODE (3,INODE,RSRCHR(1,IPT),RSRCHR(2,IPT),
|
|
& RSRCHR(3,IPT))
|
|
GO TO 100
|
|
END IF
|
|
110 CONTINUE
|
|
|
|
C Mesh-B point not coincident with Mesh-A node so compute isoparametric
|
|
C coordinates. Use Newton's method
|
|
|
|
SG = 0.
|
|
TG = 0.
|
|
RG = 0.
|
|
ITER = 0
|
|
|
|
C Build Jacobian and invert
|
|
|
|
DO 120 I = 1, NELNDA
|
|
XX(I) = XYZE(LS(I,IELT),1)
|
|
YY(I) = XYZE(LS(I,IELT),2)
|
|
ZZ(I) = 0.
|
|
120 CONTINUE
|
|
130 CONTINUE
|
|
CALL JACOBN (ITYPE,XX,YY,ZZ,SG,TG,RG,A11,A12,A13,A21,A22,A23,
|
|
& A31,A32,A33,F1,F2,F3)
|
|
DETA = A11*A22 - A12*A21
|
|
IF (ABS(DETA) .GT. 1.E-25)THEN
|
|
|
|
AI11 = A22/DETA
|
|
AI12 = -A12/DETA
|
|
AI21 = -A21/DETA
|
|
AI22 = A11/DETA
|
|
|
|
FS = F1 - XYZP(IPT,1)
|
|
FT = F2 - XYZP(IPT,2)
|
|
SNEW = SG - (AI11*FS + AI12*FT)
|
|
TNEW = TG - (AI21*FS + AI22*FT)
|
|
|
|
ITER = ITER + 1
|
|
DS = ABS(SNEW-SG)
|
|
DT = ABS(TNEW-TG)
|
|
IF (DS .LT. TOL .AND. DT .LT. TOL) GO TO 300
|
|
SG = SNEW
|
|
TG = TNEW
|
|
IF (ITER .EQ. ITERMX)GO TO 100
|
|
GO TO 130
|
|
ELSE
|
|
|
|
C Zero Jacobian - check for degenerate quad (triangular element)
|
|
|
|
TRITST = EPS*EPS*SIDMAX
|
|
IF (SIDE1 .LT. TRITST)THEN
|
|
XX(1) = XYZE(LS(1,IELT),1)
|
|
XX(2) = XYZE(LS(3,IELT),1)
|
|
XX(3) = XYZE(LS(4,IELT),1)
|
|
YY(1) = XYZE(LS(1,IELT),2)
|
|
YY(2) = XYZE(LS(3,IELT),2)
|
|
YY(3) = XYZE(LS(4,IELT),2)
|
|
ELSE IF (SIDE2 .LT. TRITST)THEN
|
|
XX(1) = XYZE(LS(1,IELT),1)
|
|
XX(2) = XYZE(LS(2,IELT),1)
|
|
XX(3) = XYZE(LS(4,IELT),1)
|
|
YY(1) = XYZE(LS(1,IELT),2)
|
|
YY(2) = XYZE(LS(2,IELT),2)
|
|
YY(3) = XYZE(LS(4,IELT),2)
|
|
ELSE IF (SIDE3 .LT. TRITST)THEN
|
|
XX(1) = XYZE(LS(1,IELT),1)
|
|
XX(2) = XYZE(LS(2,IELT),1)
|
|
XX(3) = XYZE(LS(3,IELT),1)
|
|
YY(1) = XYZE(LS(1,IELT),2)
|
|
YY(2) = XYZE(LS(2,IELT),2)
|
|
YY(3) = XYZE(LS(3,IELT),2)
|
|
ELSE IF (SIDE4 .LT. TRITST)THEN
|
|
XX(1) = XYZE(LS(2,IELT),1)
|
|
XX(2) = XYZE(LS(3,IELT),1)
|
|
XX(3) = XYZE(LS(4,IELT),1)
|
|
YY(1) = XYZE(LS(2,IELT),2)
|
|
YY(2) = XYZE(LS(3,IELT),2)
|
|
YY(3) = XYZE(LS(4,IELT),2)
|
|
ELSE
|
|
CALL ERROR ('QADSRC',
|
|
& 'ZERO JACOBIAN FOUND DURING NEWTON ITERATION',
|
|
& 'MESH-A ELEMENT',IELT,
|
|
& 'ELEMENT IS NOT A DEGENERATE QUAD - GIVING UP',
|
|
& 0,' ',' ',0)
|
|
GO TO 100
|
|
END IF
|
|
|
|
C Process as triangle
|
|
|
|
210 CONTINUE
|
|
CALL JACOBN (1,XX,YY,ZZ,SG,TG,RG,A11,A12,A13,A21,A22,A23,
|
|
& A31,A32,A33,F1,F2,F3)
|
|
DETA = A11*A22 - A12*A21
|
|
IF (ABS(DETA) .LT. 1.E-25)THEN
|
|
CALL ERROR ('SRCHQ',
|
|
& 'ZERO JACOBIAN FOUND DURING NEWTON ITERATION',
|
|
& 'MESH-A ELEMENT',IELT,
|
|
& 'TRYING TO PROCESS AS A DEGENERATE QUAD (TRIANGLE)',
|
|
& 0,' ',' ',0)
|
|
END IF
|
|
|
|
AI11 = A22/DETA
|
|
AI12 = -A12/DETA
|
|
AI21 = -A21/DETA
|
|
AI22 = A11/DETA
|
|
|
|
FS = F1 - XYZP(IPT,1)
|
|
FT = F2 - XYZP(IPT,2)
|
|
SNEW = SG - (AI11*FS + AI12*FT)
|
|
TNEW = TG - (AI21*FS + AI22*FT)
|
|
|
|
ITER = ITER + 1
|
|
DS = ABS(SNEW-SG)
|
|
DT = ABS(TNEW-TG)
|
|
IF (DS .LT. TOL .AND. DT .LT. TOL) GO TO 300
|
|
SG = SNEW
|
|
TG = TNEW
|
|
IF (ITER .EQ. ITERMX)GO TO 100
|
|
GO TO 210
|
|
END IF
|
|
|
|
300 CONTINUE
|
|
|
|
C Newton converged, load up search results arrays if appropriate
|
|
|
|
IF (ABS(SNEW) .LT. STRLMT .AND. ABS(TNEW) .LT. STRLMT)THEN
|
|
|
|
C Search was adequate
|
|
|
|
FTEST = MAX(ABS(RSRCHR(1,IPT)),ABS(RSRCHR(2,IPT)))
|
|
FCOMP = MAX(ABS(SNEW),ABS(TNEW))
|
|
IF (FTEST .GT. FCOMP .OR. ISRCHR(1,IPT) .EQ. 0)THEN
|
|
|
|
C New search is better, replace search results
|
|
|
|
ISRCHR(1,IPT) = IELT
|
|
RSRCHR(1,IPT) = SNEW
|
|
RSRCHR(2,IPT) = TNEW
|
|
RSRCHR(3,IPT) = 0.
|
|
END IF
|
|
END IF
|
|
100 CONTINUE
|
|
RETURN
|
|
END
|
|
|