//---------------------------------------------------------------------
// 
// Copyright 2010 Intel Corporation
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
// 
//---------------------------------------------------------------------
#include <math.h>
#include "header.h"

#define dmax1(x,y) ((x)>(y)? (x):(y))

void  set_constants() {

//---------------------------------------------------------------------
//---------------------------------------------------------------------

      
      ce(1,1)  = 2.0e0;
      ce(1,2)  = 0.0e0;
      ce(1,3)  = 0.0e0;
      ce(1,4)  = 4.0e0;
      ce(1,5)  = 5.0e0;
      ce(1,6)  = 3.0e0;
      ce(1,7)  = 0.5e0;
      ce(1,8)  = 0.02e0;
      ce(1,9)  = 0.01e0;
      ce(1,10) = 0.03e0;
      ce(1,11) = 0.5e0;
      ce(1,12) = 0.4e0;
      ce(1,13) = 0.3e0;
      
      ce(2,1)  = 1.0e0;
      ce(2,2)  = 0.0e0;
      ce(2,3)  = 0.0e0;
      ce(2,4)  = 0.0e0;
      ce(2,5)  = 1.0e0;
      ce(2,6)  = 2.0e0;
      ce(2,7)  = 3.0e0;
      ce(2,8)  = 0.01e0;
      ce(2,9)  = 0.03e0;
      ce(2,10) = 0.02e0;
      ce(2,11) = 0.4e0;
      ce(2,12) = 0.3e0;
      ce(2,13) = 0.5e0;

      ce(3,1)  = 2.0e0;
      ce(3,2)  = 2.0e0;
      ce(3,3)  = 0.0e0;
      ce(3,4)  = 0.0e0;
      ce(3,5)  = 0.0e0;
      ce(3,6)  = 2.0e0;
      ce(3,7)  = 3.0e0;
      ce(3,8)  = 0.04e0;
      ce(3,9)  = 0.03e0;
      ce(3,10) = 0.05e0;
      ce(3,11) = 0.3e0;
      ce(3,12) = 0.5e0;
      ce(3,13) = 0.4e0;

      ce(4,1)  = 2.0e0;
      ce(4,2)  = 2.0e0;
      ce(4,3)  = 0.0e0;
      ce(4,4)  = 0.0e0;
      ce(4,5)  = 0.0e0;
      ce(4,6)  = 2.0e0;
      ce(4,7)  = 3.0e0;
      ce(4,8)  = 0.03e0;
      ce(4,9)  = 0.05e0;
      ce(4,10) = 0.04e0;
      ce(4,11) = 0.2e0;
      ce(4,12) = 0.1e0;
      ce(4,13) = 0.3e0;

      ce(5,1)  = 5.0e0;
      ce(5,2)  = 4.0e0;
      ce(5,3)  = 3.0e0;
      ce(5,4)  = 2.0e0;
      ce(5,5)  = 0.1e0;
      ce(5,6)  = 0.4e0;
      ce(5,7)  = 0.3e0;
      ce(5,8)  = 0.05e0;
      ce(5,9)  = 0.04e0;
      ce(5,10) = 0.03e0;
      ce(5,11) = 0.1e0;
      ce(5,12) = 0.3e0;
      ce(5,13) = 0.2e0;

      c1 = 1.4e0;
      c2 = 0.4e0;
      c3 = 0.1e0;
      c4 = 1.0e0;
      c5 = 1.4e0;

      bt = sqrt(0.5e0);

      dnxm1 = 1.0e0 / (double)(grid_points(1)-1);
      dnym1 = 1.0e0 / (double)(grid_points(2)-1);
      dnzm1 = 1.0e0 / (double)(grid_points(3)-1);

      c1c2 = c1 * c2;
      c1c5 = c1 * c5;
      c3c4 = c3 * c4;
      c1345 = c1c5 * c3c4;

      conz1 = (1.0e0-c1c5);

      tx1 = 1.0e0 / (dnxm1 * dnxm1);
      tx2 = 1.0e0 / (2.0e0 * dnxm1);
      tx3 = 1.0e0 / dnxm1;

      ty1 = 1.0e0 / (dnym1 * dnym1);
      ty2 = 1.0e0 / (2.0e0 * dnym1);
      ty3 = 1.0e0 / dnym1;
      
      tz1 = 1.0e0 / (dnzm1 * dnzm1);
      tz2 = 1.0e0 / (2.0e0 * dnzm1);
      tz3 = 1.0e0 / dnzm1;

      dx1 = 0.75e0;
      dx2 = 0.75e0;
      dx3 = 0.75e0;
      dx4 = 0.75e0;
      dx5 = 0.75e0;

      dy1 = 0.75e0;
      dy2 = 0.75e0;
      dy3 = 0.75e0;
      dy4 = 0.75e0;
      dy5 = 0.75e0;

      dz1 = 1.0e0;
      dz2 = 1.0e0;
      dz3 = 1.0e0;
      dz4 = 1.0e0;
      dz5 = 1.0e0;

      dxmax = dmax1(dx3, dx4);
      dymax = dmax1(dy2, dy4);
      dzmax = dmax1(dz2, dz3);

      dssp = 0.25e0 * dmax1(dx1, dmax1(dy1, dz1) );

      c4dssp = 4.0e0 * dssp;
      c5dssp = 5.0e0 * dssp;

      dttx1 = dt*tx1;
      dttx2 = dt*tx2;
      dtty1 = dt*ty1;
      dtty2 = dt*ty2;
      dttz1 = dt*tz1;
      dttz2 = dt*tz2;

      c2dttx1 = 2.0e0*dttx1;
      c2dtty1 = 2.0e0*dtty1;
      c2dttz1 = 2.0e0*dttz1;

      dtdssp = dt*dssp;

      comz1  = dtdssp;
      comz4  = 4.0e0*dtdssp;
      comz5  = 5.0e0*dtdssp;
      comz6  = 6.0e0*dtdssp;

      c3c4tx3 = c3c4*tx3;
      c3c4ty3 = c3c4*ty3;
      c3c4tz3 = c3c4*tz3;

      dx1tx1 = dx1*tx1;
      dx2tx1 = dx2*tx1;
      dx3tx1 = dx3*tx1;
      dx4tx1 = dx4*tx1;
      dx5tx1 = dx5*tx1;
      
      dy1ty1 = dy1*ty1;
      dy2ty1 = dy2*ty1;
      dy3ty1 = dy3*ty1;
      dy4ty1 = dy4*ty1;
      dy5ty1 = dy5*ty1;
      
      dz1tz1 = dz1*tz1;
      dz2tz1 = dz2*tz1;
      dz3tz1 = dz3*tz1;
      dz4tz1 = dz4*tz1;
      dz5tz1 = dz5*tz1;

      c2iv  = 2.5e0;
      con43 = 4.0e0/3.0e0;
      con16 = 1.0e0/6.0e0;
      
      xxcon1 = c3c4tx3*con43*tx3;
      xxcon2 = c3c4tx3*tx3;
      xxcon3 = c3c4tx3*conz1*tx3;
      xxcon4 = c3c4tx3*con16*tx3;
      xxcon5 = c3c4tx3*c1c5*tx3;

      yycon1 = c3c4ty3*con43*ty3;
      yycon2 = c3c4ty3*ty3;
      yycon3 = c3c4ty3*conz1*ty3;
      yycon4 = c3c4ty3*con16*ty3;
      yycon5 = c3c4ty3*c1c5*ty3;

      zzcon1 = c3c4tz3*con43*tz3;
      zzcon2 = c3c4tz3*tz3;
      zzcon3 = c3c4tz3*conz1*tz3;
      zzcon4 = c3c4tz3*con16*tz3;
      zzcon5 = c3c4tz3*c1c5*tz3;

      return;
}