/* *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * * * CitcomS by Louis Moresi, Shijie Zhong, Lijie Han, Eh Tan, * Clint Conrad, Michael Gurnis, and Eun-seo Choi. * Copyright (C) 1994-2005, California Institute of Technology. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * * *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ /* Common functions relating to the building and use of mesh locations ... */ #include #include "global_defs.h" /* ================================================= this routine evenly divides the arc between points 1 and 2 in a great cicle. The word "evenly" means anglewise evenly. =================================================*/ void even_divide_arc12(elx,x1,y1,z1,x2,y2,z2,theta,fi) double x1,y1,z1,x2,y2,z2,*theta,*fi; int elx; { double dx,dy,dz,xx,yy,zz,myatan(); int j, nox; nox = elx+1; dx = (x2 - x1)/elx; dy = (y2 - y1)/elx; dz = (z2 - z1)/elx; for (j=1;j<=nox;j++) { xx = x1 + dx*(j-1) + 5.0e-32; yy = y1 + dy*(j-1); zz = z1 + dz*(j-1); theta[j] = acos(zz/sqrt(xx*xx+yy*yy+zz*zz)); fi[j] = myatan(yy,xx); } return; } /* ================================================= rotate the mesh =================================================*/ void rotate_mesh(E,m,icap) struct All_variables *E; int icap,m; { int i,lev; double t[4],myatan(); for (lev=E->mesh.levmin;lev<=E->mesh.levmax;lev++) { for (i=1;i<=E->lmesh.NNO[lev];i++) { t[0] = E->X[lev][m][1][i]*E->sphere.dircos[1][1]+ E->X[lev][m][2][i]*E->sphere.dircos[1][2]+ E->X[lev][m][3][i]*E->sphere.dircos[1][3]; t[1] = E->X[lev][m][1][i]*E->sphere.dircos[2][1]+ E->X[lev][m][2][i]*E->sphere.dircos[2][2]+ E->X[lev][m][3][i]*E->sphere.dircos[2][3]; t[2] = E->X[lev][m][1][i]*E->sphere.dircos[3][1]+ E->X[lev][m][2][i]*E->sphere.dircos[3][2]+ E->X[lev][m][3][i]*E->sphere.dircos[3][3]; E->X[lev][m][1][i] = t[0]; E->X[lev][m][2][i] = t[1]; E->X[lev][m][3][i] = t[2]; E->SX[lev][m][1][i] = acos(t[2]/E->SX[lev][m][3][i]); E->SX[lev][m][2][i] = myatan(t[1],t[0]); } } /* lev */ return; }