/*
GenSurf plugin for GtkRadiant
Copyright (C) 2001 David Hyde, Loki software and qeradiant.com

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include "gensurf.h"

double  xmin,xmax,ymin,ymax,zmin,zmax;
double  backface;
extern double dh, dv;
FILE  *fmap;
XYZ     xyz[MAX_ROWS+1][MAX_ROWS+1];
int     contents;
int     surface[3];

#include "iundo.h"

#include "refcounted_ptr.h"

#include <vector>
#include <list>
#include <map>
#include <algorithm>

#include "scenelib.h"

scene::Node* h_func_group;
scene::Node* h_worldspawn;


//=============================================================
// Hydra : snap-to-grid begin
double CalculateSnapValue(double value)
{
	long                snapvalue;

  // simple uncomplicated snapping, rounding both UP and DOWN to the nearest
	// grid unit.
	if (SnapToGrid >0)
	{
		snapvalue = (int)value / SnapToGrid;
		if ((long)value % SnapToGrid < (SnapToGrid / 2)) // Snap Downwards if less than halfway between to grid units
			value = snapvalue * SnapToGrid; 
		else // Snap Upwards if more than halfway between to grid units
			value = (snapvalue+1) * SnapToGrid;
	}
  return value;
}
// Hydra : snap-to-grid end

//=============================================================
bool ValidSurface()
{
  if(WaveType == WAVE_BITMAP && !gbmp.colors) return FALSE;
  if(NH  < 1)        return FALSE;
  if(NH  > MAX_ROWS) return FALSE;
  if(NV  < 1)        return FALSE;
  if(NV  > MAX_ROWS) return FALSE;
  if(Hll >= Hur)     return FALSE;
  if(Vll >= Vur)     return FALSE;
  return TRUE;
}

//=============================================================
int MapPatches()
{
  int     NH_remain;
  int     NV_remain;
  int     NH_patch;
  int     NV_patch;
  int     BrushNum = 0;
  int     i, j, k1, k2, k3;
  int     i0, j0, ii;
  char    szOops[128];

  dh = (Hur-Hll)/NH;
  dv = (Vur-Vll)/NV;

  // Generate control points in pp array to give desired values currently
  // in p array.
  switch(Plane)
  {
  case PLANE_XY0:
  case PLANE_XY1:
    k1 = 0;
    k2 = 1;
    k3 = 2;
    break;
  case PLANE_XZ0:
  case PLANE_XZ1:
    k1 = 0;
    k2 = 2;
    k3 = 1;
    break;
  case PLANE_YZ0:
  case PLANE_YZ1:
    k1 = 1;
    k2 = 2;
    k3 = 0;
    break;
  }
  for(i=0; i<=NH; i++)
  {
    for(j=0; j<=NV; j++)
    {
      xyz[i][j].pp[k1] = xyz[i][j].p[k1];
      xyz[i][j].pp[k2] = xyz[i][j].p[k2];
    }
  }
  for(i=0; i<=NH; i+=2)
  {
    for(j=0; j<=NV; j+=2)
      xyz[i][j].pp[k3] = xyz[i][j].p[k3];
  }
  for(i=1; i<NH; i+=2)
  {
    for(j=0; j<=NV; j+=2)
    {
      xyz[i][j].pp[k3] = (4*xyz[i][j].p[k3] - xyz[i-1][j].p[k3] - xyz[i+1][j].p[k3])/2;
    }
  }
  for(j=1; j<NV; j+=2)
  {
    for(i=0; i<=NH; i+=2)
    {
      xyz[i][j].pp[k3] = (4*xyz[i][j].p[k3] - xyz[i][j-1].p[k3] - xyz[i][j+1].p[k3])/2;
    }
  }
  for(i=1; i<NH; i+=2)
  {
    for(j=1; j<NV; j+=2)
    {
      xyz[i][j].pp[k3] = (16*xyz[i][j].p[k3] - xyz[i-1][j-1].p[k3] - 2*xyz[i][j-1].p[k3]
        - xyz[i+1][j-1].p[k3] - 2*xyz[i-1][j].p[k3] - 2*xyz[i+1][j].p[k3]
        - xyz[i-1][j+1].p[k3] - 2*xyz[i][j+1].p[k3] - xyz[i+1][j+1].p[k3])/4;
    }
  }

  NH_remain = NH+1;
  i0 = 0;
  while(NH_remain > 1)
  {
    if(( (NH_remain-1) % 14) == 0)
      NH_patch = 15;
    else if(( (NH_remain-1) % 12) == 0)
      NH_patch = 13;
    else if(( (NH_remain-1) % 10) == 0)
      NH_patch = 11;
    else if(( (NH_remain-1) % 8) == 0)
      NH_patch = 9;
    else if(( (NH_remain-1) % 6) == 0)
      NH_patch = 7;
    else if(( (NH_remain-1) % 4) == 0)
      NH_patch = 5;
    else if(( (NH_remain-1) % 2) == 0)
      NH_patch = 3;
    else if(NH_remain > 16)
      NH_patch = 7;
    else if(NH_remain > 4)
      NH_patch = 5;
    else
      NH_patch = 3;
    while( NH_patch > 3 && (NH_patch-1)*dh > 512 )
      NH_patch -= 2;
    NH_remain -= (NH_patch-1);
    if(NH_remain < 0)
    {
      sprintf(szOops,"Oops... screwed up with NH=%d",NH);
      g_FuncTable.m_pfnMessageBox(NULL,szOops,"Uh oh");
    }
    NV_remain = NV+1;
    j0 = 0;
    while(NV_remain > 1)
    {
      if(( (NV_remain-1) % 14) == 0)
        NV_patch = 15;
      else if(( (NV_remain-1) % 12) == 0)
        NV_patch = 13;
      else if(( (NV_remain-1) % 10) == 0)
        NV_patch = 11;
      else if(( (NV_remain-1) % 8) == 0)
        NV_patch = 9;
      else if(( (NV_remain-1) % 6) == 0)
        NV_patch = 7;
      else if(( (NV_remain-1) % 4) == 0)
        NV_patch = 5;
      else if(( (NV_remain-1) % 2) == 0)
        NV_patch = 3;
      else if(NV_remain > 16)
        NV_patch = 7;
      else if(NV_remain > 4)
        NV_patch = 5;
      else
        NV_patch = 3;
      while( NV_patch > 3 && (NV_patch-1)*dh > 512 )
        NV_patch -= 2;
      NV_remain -= (NV_patch-1);
      if(NV_remain < 0)
      {
        sprintf(szOops,"Oops... screwed up with NV=%d",NV);
        g_FuncTable.m_pfnMessageBox(NULL,szOops,"Uh oh");
      }

      scene::Node* patch = MakePatch();
#if 0
      b->pPatch->setDims(NH_patch, NV_patch);
      for(i=0; i<NH_patch; i++)
      {
        switch(Plane)
        {
        case PLANE_XY1:
        case PLANE_XZ0:
        case PLANE_YZ1:
          ii = i0 + NH_patch - 1 - i;
          break;
        default:
          ii = i0+i;
        }
        for(j=0; j<NV_patch; j++)
        {
          b->pPatch->ctrlAt(COL,i,j)[0] = (float)xyz[ii][j0+j].pp[0];
          b->pPatch->ctrlAt(COL,i,j)[1] = (float)xyz[ii][j0+j].pp[1];
          b->pPatch->ctrlAt(COL,i,j)[2] = (float)xyz[ii][j0+j].pp[2];
          b->pPatch->ctrlAt(COL,i,j)[3] = (float)i;
          b->pPatch->ctrlAt(COL,i,j)[4] = (float)j;
        }
      }
      b->pPatch->UpdateCachedData();
#endif
      BrushNum++;
      j0 += NV_patch-1;
    }
    i0 += NH_patch-1;
  }
  return BrushNum;
}

//=============================================================
void MapBrushes()
{
  char  hint[128];
  char  skip[128];
  char  sidetext[64];
  char  surftext[64];
  char  surftext2[64];
  char  surft[64];
  float Steep;
  vec3_t  PlaneNormal,SurfNormal;
  vec3_t  t[2];
  int   i, j, k;
  int   surf;
  bool  CheckAngle;
  BRUSH brush;
  XYZ   v[8];

  strcpy(surftext,Texture[Game][0]);
  strcpy(sidetext,(strlen(Texture[Game][1]) ? Texture[Game][1] : Texture[Game][0]));
  strcpy(surftext2,(strlen(Texture[Game][2]) ? Texture[Game][2] : Texture[Game][0]));

  // if surftext2 is identical to surftext, there's no need to
  // check surface angle
  if(!g_strcasecmp(surftext,surftext2))
    CheckAngle = FALSE;
  else
  {
    CheckAngle = TRUE;
    Steep = (float)cos((double)SlantAngle/57.2957795);
    switch(Plane)
    {
    case PLANE_XY0: PlaneNormal[0]= 0.;PlaneNormal[1]= 0.;PlaneNormal[2]= 1.;break;
    case PLANE_XY1: PlaneNormal[0]= 0.;PlaneNormal[1]= 0.;PlaneNormal[2]=-1.;break;
    case PLANE_XZ0: PlaneNormal[0]= 0.;PlaneNormal[1]= 1.;PlaneNormal[2]= 1.;break;
    case PLANE_XZ1: PlaneNormal[0]= 0.;PlaneNormal[1]=-1.;PlaneNormal[2]= 1.;break;
    case PLANE_YZ0: PlaneNormal[0]= 1.;PlaneNormal[1]= 0.;PlaneNormal[2]= 1.;break;
    case PLANE_YZ1: PlaneNormal[0]=-1.;PlaneNormal[1]= 0.;PlaneNormal[2]= 1.;break;
    }
  }
  
  OpenFuncGroup();

  for(i=0; i<NH; i++)
  {
    for(j=0; j<NV; j++)
    {
      if( (i+j) % 2 )
      {
        VectorCopy(xyz[i  ][j  ].p, v[0].p);
        switch(Plane)
        {
        case PLANE_XY1:
        case PLANE_XZ1:
        case PLANE_YZ1:
          VectorCopy(xyz[i+1][j  ].p, v[1].p);
          VectorCopy(xyz[i+1][j+1].p, v[2].p);
          break;
        default:
          VectorCopy(xyz[i+1][j+1].p, v[1].p);
          VectorCopy(xyz[i+1][j  ].p, v[2].p);
        }
      }
      else
      {
        VectorCopy(xyz[i  ][j  ].p, v[0].p);
        switch(Plane)
        {
        case PLANE_XY1:
        case PLANE_XZ1:
        case PLANE_YZ1:
          VectorCopy(xyz[i+1][j  ].p, v[1].p);
          VectorCopy(xyz[i  ][j+1].p, v[2].p);
          break;
        default:
          VectorCopy(xyz[i  ][j+1].p, v[1].p);
          VectorCopy(xyz[i+1][j  ].p, v[2].p);
        }
      }
      VectorCopy(v[0].p,v[3].p);
      VectorCopy(v[1].p,v[4].p);
      VectorCopy(v[2].p,v[5].p);
      switch(Plane)
      {
      case PLANE_XZ0:
      case PLANE_XZ1:
        v[0].p[1] = backface;
        v[1].p[1] = backface;
        v[2].p[1] = backface;
        break;
      case PLANE_YZ0:
      case PLANE_YZ1:
        v[3].p[0] = backface;
        v[4].p[0] = backface;
        v[5].p[0] = backface;
        break;
      default:
        v[3].p[2] = backface;
        v[4].p[2] = backface;
        v[5].p[2] = backface;
      }

      brush.Number   = i*NV*2+j*2;
      brush.NumFaces = 5;
      XYZtoV(&v[0],&brush.face[0].v[0]);
      XYZtoV(&v[3],&brush.face[0].v[1]);
      XYZtoV(&v[4],&brush.face[0].v[2]);
      strcpy(brush.face[0].texture,
        (strlen(Texture[Game][1]) ? Texture[Game][1] : Texture[Game][0]));
      brush.face[0].Shift[0] = (float)TexOffset[0];
      brush.face[0].Shift[1] = (float)TexOffset[1];
      brush.face[0].Rotate   = 0.;
      brush.face[0].Scale[0] = (float)TexScale[0];
      brush.face[0].Scale[1] = (float)TexScale[1];
      brush.face[0].Contents = contents;
      brush.face[0].Surface  = surface[1];
      brush.face[0].Value    = 0;

      XYZtoV(&v[1],&brush.face[1].v[0]);
      XYZtoV(&v[4],&brush.face[1].v[1]);
      XYZtoV(&v[5],&brush.face[1].v[2]);
      strcpy(brush.face[1].texture,
        (strlen(Texture[Game][1]) ? Texture[Game][1] : Texture[Game][0]));
      brush.face[1].Shift[0] = (float)TexOffset[0];
      brush.face[1].Shift[1] = (float)TexOffset[1];
      brush.face[1].Rotate   = 0.;
      brush.face[1].Scale[0] = (float)TexScale[0];
      brush.face[1].Scale[1] = (float)TexScale[1];
      brush.face[1].Contents = contents;
      brush.face[1].Surface  = surface[1];
      brush.face[1].Value    = 0;

      XYZtoV(&v[2],&brush.face[2].v[0]);
      XYZtoV(&v[5],&brush.face[2].v[1]);
      XYZtoV(&v[3],&brush.face[2].v[2]);
      strcpy(brush.face[2].texture,
        (strlen(Texture[Game][1]) ? Texture[Game][1] : Texture[Game][0]));
      brush.face[2].Shift[0] = (float)TexOffset[0];
      brush.face[2].Shift[1] = (float)TexOffset[1];
      brush.face[2].Rotate   = 0.;
      brush.face[2].Scale[0] = (float)TexScale[0];
      brush.face[2].Scale[1] = (float)TexScale[1];
      brush.face[2].Contents = contents;
      brush.face[2].Surface  = surface[1];
      brush.face[2].Value    = 0;

      if(CheckAngle && (Plane==PLANE_XZ0 || Plane==PLANE_XZ1))
      {
        XYZVectorSubtract(v[4].p,v[3].p,t[0]);
        XYZVectorSubtract(v[5].p,v[4].p,t[1]);
        CrossProduct(t[0],t[1],SurfNormal);
        VectorNormalize(SurfNormal,SurfNormal);
        if(DotProduct(SurfNormal,PlaneNormal) < Steep)
        {
          strcpy(surft,surftext2);
          surf = surface[2];
        }
        else
        {
          strcpy(surft,surftext);
          surf = surface[0];
        }
      }
      else
      {
        strcpy(surft,surftext);
        surf = surface[0];
      }

      XYZtoV(&v[3],&brush.face[3].v[0]);
      XYZtoV(&v[5],&brush.face[3].v[1]);
      XYZtoV(&v[4],&brush.face[3].v[2]);
      strcpy(brush.face[3].texture,
        (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? surft : sidetext));
      brush.face[3].Shift[0] = (float)TexOffset[0];
      brush.face[3].Shift[1] = (float)TexOffset[1];
      brush.face[3].Rotate   = 0.;
      brush.face[3].Scale[0] = (float)TexScale[0];
      brush.face[3].Scale[1] = (float)TexScale[1];
      brush.face[3].Contents = contents;
      brush.face[3].Surface  = (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? surf : surface[1]);
      brush.face[3].Value    = (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? ArghRad2 : 0);

      if(CheckAngle && Plane!=PLANE_XZ0 && Plane!=PLANE_XZ1)
      {
        XYZVectorSubtract(v[2].p,v[0].p,t[0]);
        XYZVectorSubtract(v[1].p,v[2].p,t[1]);
        CrossProduct(t[0],t[1],SurfNormal);
        VectorNormalize(SurfNormal,SurfNormal);
        if(DotProduct(SurfNormal,PlaneNormal) < Steep)
        {
          strcpy(surft,surftext2);
          surf = surface[2];
        }
        else
        {
          strcpy(surft,surftext);
          surf = surface[0];
        }
      }
      else
      {
        strcpy(surft,surftext);
        surf = surface[0];
      }

      XYZtoV(&v[0],&brush.face[4].v[0]);
      XYZtoV(&v[1],&brush.face[4].v[1]);
      XYZtoV(&v[2],&brush.face[4].v[2]);
      strcpy(brush.face[4].texture,
        (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? sidetext : surft));
      brush.face[4].Shift[0] = (float)TexOffset[0];
      brush.face[4].Shift[1] = (float)TexOffset[1];
      brush.face[4].Rotate   = 0.;
      brush.face[4].Scale[0] = (float)TexScale[0];
      brush.face[4].Scale[1] = (float)TexScale[1];
      brush.face[4].Contents = contents;
      brush.face[4].Surface  = (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? surface[1] : surf);
      brush.face[4].Value    = (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? 0 : ArghRad2);

      MakeBrush(&brush);
      if( (i+j) %2 )
      {
        VectorCopy(xyz[i  ][j+1].p,v[0].p);
        switch(Plane)
        {
        case PLANE_XY1:
        case PLANE_XZ1:
        case PLANE_YZ1:
          VectorCopy(xyz[i  ][j  ].p,v[1].p);
          VectorCopy(xyz[i+1][j+1].p,v[2].p);
          break;
        default:
          VectorCopy(xyz[i+1][j+1].p,v[1].p);
          VectorCopy(xyz[i  ][j  ].p,v[2].p);
        }
      }
      else
      {
        VectorCopy(xyz[i  ][j+1].p,v[0].p);
        switch(Plane)
        {
        case PLANE_XY1:
        case PLANE_XZ1:
        case PLANE_YZ1:
          VectorCopy(xyz[i+1][j  ].p,v[1].p);
          VectorCopy(xyz[i+1][j+1].p,v[2].p);
          break;
        default:
          VectorCopy(xyz[i+1][j+1].p,v[1].p);
          VectorCopy(xyz[i+1][j  ].p,v[2].p);
        }
      }
      VectorCopy(v[0].p,v[3].p);
      VectorCopy(v[1].p,v[4].p);
      VectorCopy(v[2].p,v[5].p);
      switch(Plane)
      {
      case PLANE_XZ0:
      case PLANE_XZ1:
        v[0].p[1] = backface;
        v[1].p[1] = backface;
        v[2].p[1] = backface;
        break;
      case PLANE_YZ0:
      case PLANE_YZ1:
        v[3].p[0] = backface;
        v[4].p[0] = backface;
        v[5].p[0] = backface;
        break;
      default:
        v[3].p[2] = backface;
        v[4].p[2] = backface;
        v[5].p[2] = backface;
      }
      brush.Number   = i*NV*2+j*2+1;
      brush.NumFaces = 5;
      XYZtoV(&v[0],&brush.face[0].v[0]);
      XYZtoV(&v[3],&brush.face[0].v[1]);
      XYZtoV(&v[4],&brush.face[0].v[2]);
      strcpy(brush.face[0].texture,
        (strlen(Texture[Game][1]) ? Texture[Game][1] : Texture[Game][0]));
      brush.face[0].Shift[0] = (float)TexOffset[0];
      brush.face[0].Shift[1] = (float)TexOffset[1];
      brush.face[0].Rotate   = 0.;
      brush.face[0].Scale[0] = (float)TexScale[0];
      brush.face[0].Scale[1] = (float)TexScale[1];
      brush.face[0].Contents = contents;
      brush.face[0].Surface  = surface[1];
      brush.face[0].Value    = 0;

      XYZtoV(&v[1],&brush.face[1].v[0]);
      XYZtoV(&v[4],&brush.face[1].v[1]);
      XYZtoV(&v[5],&brush.face[1].v[2]);
      strcpy(brush.face[1].texture,
        (strlen(Texture[Game][1]) ? Texture[Game][1] : Texture[Game][0]));
      brush.face[1].Shift[0] = (float)TexOffset[0];
      brush.face[1].Shift[1] = (float)TexOffset[1];
      brush.face[1].Rotate   = 0.;
      brush.face[1].Scale[0] = (float)TexScale[0];
      brush.face[1].Scale[1] = (float)TexScale[1];
      brush.face[1].Contents = contents;
      brush.face[1].Surface  = surface[1];
      brush.face[1].Value    = 0;

      XYZtoV(&v[2],&brush.face[2].v[0]);
      XYZtoV(&v[5],&brush.face[2].v[1]);
      XYZtoV(&v[3],&brush.face[2].v[2]);
      strcpy(brush.face[2].texture,
        (strlen(Texture[Game][1]) ? Texture[Game][1] : Texture[Game][0]));
      brush.face[2].Shift[0] = (float)TexOffset[0];
      brush.face[2].Shift[1] = (float)TexOffset[1];
      brush.face[2].Rotate   = 0.;
      brush.face[2].Scale[0] = (float)TexScale[0];
      brush.face[2].Scale[1] = (float)TexScale[1];
      brush.face[2].Contents = contents;
      brush.face[2].Surface  = surface[1];
      brush.face[2].Value    = 0;

      if(CheckAngle && (Plane==PLANE_XZ0 || Plane==PLANE_XZ1))
      {
        XYZVectorSubtract(v[4].p,v[3].p,t[0]);
        XYZVectorSubtract(v[5].p,v[4].p,t[1]);
        CrossProduct(t[0],t[1],SurfNormal);
        VectorNormalize(SurfNormal,SurfNormal);
        if(DotProduct(SurfNormal,PlaneNormal) < Steep)
        {
          strcpy(surft,surftext2);
          surf = surface[2];
        }
        else
        {
          strcpy(surft,surftext);
          surf = surface[0];
        }
      }
      else
      {
        strcpy(surft,surftext);
        surf = surface[0];
      }
      XYZtoV(&v[3],&brush.face[3].v[0]);
      XYZtoV(&v[5],&brush.face[3].v[1]);
      XYZtoV(&v[4],&brush.face[3].v[2]);
      strcpy(brush.face[3].texture,
        (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? surft : sidetext));
      brush.face[3].Shift[0] = (float)TexOffset[0];
      brush.face[3].Shift[1] = (float)TexOffset[1];
      brush.face[3].Rotate   = 0.;
      brush.face[3].Scale[0] = (float)TexScale[0];
      brush.face[3].Scale[1] = (float)TexScale[1];
      brush.face[3].Contents = contents;
      brush.face[3].Surface  = (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? surf : surface[1]);
      brush.face[3].Value    = (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? ArghRad2 : 0);

      if(CheckAngle && Plane!=PLANE_XZ0 && Plane!=PLANE_XZ1)
      {
        XYZVectorSubtract(v[2].p,v[0].p,t[0]);
        XYZVectorSubtract(v[1].p,v[2].p,t[1]);
        CrossProduct(t[0],t[1],SurfNormal);
        VectorNormalize(SurfNormal,SurfNormal);
        if(DotProduct(SurfNormal,PlaneNormal) < Steep)
        {
          strcpy(surft,surftext2);
          surf = surface[2];
        }
        else
        {
          strcpy(surft,surftext);
          surf = surface[0];
        }
      }
      else
      {
        strcpy(surft,surftext);
        surf = surface[0];
      }
      XYZtoV(&v[0],&brush.face[4].v[0]);
      XYZtoV(&v[1],&brush.face[4].v[1]);
      XYZtoV(&v[2],&brush.face[4].v[2]);
      strcpy(brush.face[4].texture,
        (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? sidetext : surft));
      brush.face[4].Shift[0] = (float)TexOffset[0];
      brush.face[4].Shift[1] = (float)TexOffset[1];
      brush.face[4].Rotate   = 0.;
      brush.face[4].Scale[0] = (float)TexScale[0];
      brush.face[4].Scale[1] = (float)TexScale[1];
      brush.face[4].Contents = contents;
      brush.face[4].Surface  = (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? surface[1] : surf);
      brush.face[4].Value    = (Plane==PLANE_XZ0 || Plane==PLANE_XZ1 ? 0 : ArghRad2);

      MakeBrush(&brush);
    }
  }
  CloseFuncGroup();

  if( AddHints || GimpHints )
  {
    int detail, i1, j1, N;
    double front;

    switch(Game)
    {
    case HALFLIFE:
      strcpy(hint,"HINT");
      strcpy(skip,"HINT");
      break;
    case SIN:
      strcpy(hint,"generic/misc/hint");
      strcpy(skip,"generic/misc/skip");
      break;
    case HERETIC2:
      strcpy(hint,"general/hint");
      strcpy(skip,"general/hint");   // Heretic2 doesn't have a skip texture
      break;
    case KINGPIN:
      strcpy(hint,"common/0_hint");
      strcpy(skip,"common/0_skip");
      break;
    case GENESIS3D:
      strcpy(hint,"hint");
      strcpy(skip,"hint");
      break;
    case QUAKE3:
      strcpy(hint,"textures/common/hint");
      strcpy(skip,"textures/common/skip");
      break;
    default:
      strcpy(hint,"e1u1/hint");
      strcpy(skip,"e1u1/skip");
    }

    OpenFuncGroup();

    if(AddHints==1)
    {
      detail = CONTENTS_DETAIL;
      N = 0;
      for(i=0; i<NH; i++)
      {
        i1 = i+1;
        
        for(j=0; j<NV; j++)
        {
          
          // For detail hint brushes, no need to use a hint brush over
          // EVERY grid square... it would be redundant. Instead use
          // a checkerboard pattern
          if((i+j)%2) continue;
          
          j1 = j+1;
          
          VectorCopy(xyz[i  ][j  ].p, v[0].p);
          switch(Plane)
          {
          case PLANE_XY1:
          case PLANE_XZ1:
          case PLANE_YZ1:
            VectorCopy(xyz[i1][j ].p, v[1].p);
            VectorCopy(xyz[i1][j1].p, v[2].p);
            VectorCopy(xyz[i ][j1].p, v[3].p);
            break;
          default:
            VectorCopy(xyz[i ][j1].p, v[1].p);
            VectorCopy(xyz[i1][j1].p, v[2].p);
            VectorCopy(xyz[i1][j ].p, v[3].p);
          }
          
          VectorCopy(v[0].p,v[4].p);
          VectorCopy(v[1].p,v[5].p);
          VectorCopy(v[2].p,v[6].p);
          VectorCopy(v[3].p,v[7].p);
          
          switch(Plane)
          {
          case PLANE_XY1:
            front  = LessThan(zmin,32.);
            v[4].p[2] = backface;
            v[5].p[2] = backface;
            v[6].p[2] = backface;
            v[7].p[2] = backface;
            break;
          case PLANE_XZ0:
            front  = MoreThan(ymax,32.);
            v[0].p[1] = backface;
            v[1].p[1] = backface;
            v[2].p[1] = backface;
            v[3].p[1] = backface;
            break;
          case PLANE_XZ1:
            front  = LessThan(ymin,32.);
            v[0].p[1] = backface;
            v[1].p[1] = backface;
            v[2].p[1] = backface;
            v[3].p[1] = backface;
            break;
          case PLANE_YZ0:
            front  = MoreThan(xmax,32.);
            v[4].p[0] = backface;
            v[5].p[0] = backface;
            v[6].p[0] = backface;
            v[7].p[0] = backface;
            break;
          case PLANE_YZ1:
            front  = LessThan(xmin,32.);
            v[4].p[0] = backface;
            v[5].p[0] = backface;
            v[6].p[0] = backface;
            v[7].p[0] = backface;
            break;
          default:
            front  = MoreThan(zmax,32.);
            v[4].p[2] = backface;
            v[5].p[2] = backface;
            v[6].p[2] = backface;
            v[7].p[2] = backface;
          }
          
          switch(Plane)
          {
          case PLANE_XZ0:
          case PLANE_XZ1:
            v[4].p[1] = front;
            v[5].p[1] = v[4].p[1];
            v[6].p[1] = v[4].p[1];
            v[7].p[1] = v[4].p[1];
            break;
          case PLANE_YZ0:
          case PLANE_YZ1:
            v[0].p[0] = front;
            v[1].p[0] = v[0].p[0];
            v[2].p[0] = v[0].p[0];
            v[3].p[0] = v[0].p[0];
            break;
          default:
            v[0].p[2] = front;
            v[1].p[2] = v[0].p[2];
            v[2].p[2] = v[0].p[2];
            v[3].p[2] = v[0].p[2];
          }
          
          brush.NumFaces = 6;
          brush.Number   = N;
          XYZtoV(&v[0],&brush.face[0].v[0]);
          XYZtoV(&v[1],&brush.face[0].v[1]);
          XYZtoV(&v[2],&brush.face[0].v[2]);
          strcpy(brush.face[0].texture,skip);
          brush.face[0].Shift[0] = 0.;
          brush.face[0].Shift[1] = 0.;
          brush.face[0].Rotate   = 0.;
          brush.face[0].Scale[0] = 1.;
          brush.face[0].Scale[1] = 1.;
          brush.face[0].Contents = detail;
          brush.face[0].Surface  = SURF_SKIP;
          brush.face[0].Value    = 0;
          
          XYZtoV(&v[4],&brush.face[1].v[0]);
          XYZtoV(&v[7],&brush.face[1].v[1]);
          XYZtoV(&v[6],&brush.face[1].v[2]);
          strcpy(brush.face[1].texture,skip);
          brush.face[1].Shift[0] = 0.;
          brush.face[1].Shift[1] = 0.;
          brush.face[1].Rotate   = 0.;
          brush.face[1].Scale[0] = 1.;
          brush.face[1].Scale[1] = 1.;
          brush.face[1].Contents = detail;
          brush.face[1].Surface  = SURF_SKIP;
          brush.face[1].Value    = 0;
          
          XYZtoV(&v[0],&brush.face[2].v[0]);
          XYZtoV(&v[4],&brush.face[2].v[1]);
          XYZtoV(&v[5],&brush.face[2].v[2]);
          strcpy(brush.face[2].texture,hint);
          brush.face[2].Shift[0] = 0.;
          brush.face[2].Shift[1] = 0.;
          brush.face[2].Rotate   = 0.;
          brush.face[2].Scale[0] = 1.;
          brush.face[2].Scale[1] = 1.;
          brush.face[2].Contents = detail;
          brush.face[2].Surface  = SURF_HINT;
          brush.face[2].Value    = 0;
          
          XYZtoV(&v[1],&brush.face[3].v[0]);
          XYZtoV(&v[5],&brush.face[3].v[1]);
          XYZtoV(&v[6],&brush.face[3].v[2]);
          strcpy(brush.face[3].texture,hint);
          brush.face[3].Shift[0] = 0.;
          brush.face[3].Shift[1] = 0.;
          brush.face[3].Rotate   = 0.;
          brush.face[3].Scale[0] = 1.;
          brush.face[3].Scale[1] = 1.;
          brush.face[3].Contents = detail;
          brush.face[3].Surface  = SURF_HINT;
          brush.face[3].Value    = 0;
          
          XYZtoV(&v[2],&brush.face[4].v[0]);
          XYZtoV(&v[6],&brush.face[4].v[1]);
          XYZtoV(&v[7],&brush.face[4].v[2]);
          strcpy(brush.face[4].texture,hint);
          brush.face[4].Shift[0] = 0.;
          brush.face[4].Shift[1] = 0.;
          brush.face[4].Rotate   = 0.;
          brush.face[4].Scale[0] = 1.;
          brush.face[4].Scale[1] = 1.;
          brush.face[4].Contents = detail;
          brush.face[4].Surface  = SURF_HINT;
          brush.face[4].Value    = 0;
          
          XYZtoV(&v[3],&brush.face[5].v[0]);
          XYZtoV(&v[7],&brush.face[5].v[1]);
          XYZtoV(&v[4],&brush.face[5].v[2]);
          strcpy(brush.face[5].texture,hint);
          brush.face[5].Shift[0] = 0.;
          brush.face[5].Shift[1] = 0.;
          brush.face[5].Rotate   = 0.;
          brush.face[5].Scale[0] = 1.;
          brush.face[5].Scale[1] = 1.;
          brush.face[5].Contents = detail;
          brush.face[5].Surface  = SURF_HINT;
          brush.face[5].Value    = 0;
          
          MakeBrush(&brush);
          N++;
        }
      }
    }
    if(GimpHints)
    {
      N = 0;
      // these brush parameters never change
      brush.NumFaces = 5;
      for(i=0; i<6; i++)
      {
        strcpy(brush.face[i].texture,hint);
        brush.face[i].Shift[0] = 0.;
        brush.face[i].Shift[1] = 0.;
        brush.face[i].Rotate   = 0.;
        brush.face[i].Scale[0] = 1.;
        brush.face[i].Scale[1] = 1.;
        brush.face[i].Contents = 0;
        brush.face[i].Surface  = SURF_HINT;
        brush.face[i].Value    = 0;
      }
      for(i=0; i<NH; i++)
      {
        for(j=0; j<NV; j++)
        {
          for(k=0; k<2; k++)
          {
            if(k==0)
            {
              if( (i+j) % 2 )
              {
                VectorCopy(xyz[i  ][j  ].p, v[0].p);
                switch(Plane)
                {
                case PLANE_XY1:
                case PLANE_XZ1:
                case PLANE_YZ1:
                  VectorCopy(xyz[i+1][j  ].p, v[1].p);
                  VectorCopy(xyz[i+1][j+1].p, v[2].p);
                  break;
                default:
                  VectorCopy(xyz[i+1][j+1].p, v[1].p);
                  VectorCopy(xyz[i+1][j  ].p, v[2].p);
                }
              }
              else
              {
                VectorCopy(xyz[i  ][j  ].p, v[0].p);
                switch(Plane)
                {
                case PLANE_XY1:
                case PLANE_XZ1:
                case PLANE_YZ1:
                  VectorCopy(xyz[i+1][j  ].p, v[1].p);
                  VectorCopy(xyz[i  ][j+1].p, v[2].p);
                  break;
                default:
                  VectorCopy(xyz[i  ][j+1].p, v[1].p);
                  VectorCopy(xyz[i+1][j  ].p, v[2].p);
                }
              }
            }
            else
            {
              if( (i+j) %2 )
              {
                VectorCopy(xyz[i  ][j+1].p,v[0].p);
                switch(Plane)
                {
                case PLANE_XY1:
                case PLANE_XZ1:
                case PLANE_YZ1:
                  VectorCopy(xyz[i  ][j  ].p,v[1].p);
                  VectorCopy(xyz[i+1][j+1].p,v[2].p);
                  break;
                default:
                  VectorCopy(xyz[i+1][j+1].p,v[1].p);
                  VectorCopy(xyz[i  ][j  ].p,v[2].p);
                }
              }
              else
              {
                VectorCopy(xyz[i  ][j+1].p,v[0].p);
                switch(Plane)
                {
                case PLANE_XY1:
                case PLANE_XZ1:
                case PLANE_YZ1:
                  VectorCopy(xyz[i+1][j  ].p,v[1].p);
                  VectorCopy(xyz[i+1][j+1].p,v[2].p);
                  break;
                default:
                  VectorCopy(xyz[i+1][j+1].p,v[1].p);
                  VectorCopy(xyz[i+1][j  ].p,v[2].p);
                }
              }
            }
            VectorCopy(v[0].p,v[3].p);
            VectorCopy(v[1].p,v[4].p);
            VectorCopy(v[2].p,v[5].p);
            switch(Plane)
            {
            case PLANE_XY0:
              v[0].p[2] += HINT_OFFSET;
              v[1].p[2] += HINT_OFFSET;
              v[2].p[2] += HINT_OFFSET;
//              v[3].p[2] = backface;
//              v[4].p[2] = backface;
//              v[5].p[2] = backface;
              break;
            case PLANE_XY1:
              v[0].p[2] -= HINT_OFFSET;
              v[1].p[2] -= HINT_OFFSET;
              v[2].p[2] -= HINT_OFFSET;
//              v[3].p[2] = backface;
//              v[4].p[2] = backface;
//              v[5].p[2] = backface;
              break;
            case PLANE_XZ0:
//              v[0].p[1] = backface;
//              v[1].p[1] = backface;
//              v[2].p[1] = backface;
              v[3].p[1] += HINT_OFFSET;
              v[4].p[1] += HINT_OFFSET;
              v[5].p[1] += HINT_OFFSET;
              break;            
            case PLANE_XZ1:
//              v[0].p[1] = backface;
//              v[1].p[1] = backface;
//              v[2].p[1] = backface;
              v[3].p[1] -= HINT_OFFSET;
              v[4].p[1] -= HINT_OFFSET;
              v[5].p[1] -= HINT_OFFSET;
              break;
            case PLANE_YZ0:
              v[0].p[0] += HINT_OFFSET;
              v[1].p[0] += HINT_OFFSET;
              v[2].p[0] += HINT_OFFSET;
//              v[3].p[0] = backface;
//              v[4].p[0] = backface;
//              v[5].p[0] = backface;
              break;
            case PLANE_YZ1:
              v[0].p[0] -= HINT_OFFSET;
              v[1].p[0] -= HINT_OFFSET;
              v[2].p[0] -= HINT_OFFSET;
//              v[3].p[0] = backface;
//              v[4].p[0] = backface;
//              v[5].p[0] = backface;
              break;
            }
            brush.Number   = N;
            XYZtoV(&v[0],&brush.face[0].v[0]);
            XYZtoV(&v[3],&brush.face[0].v[1]);
            XYZtoV(&v[4],&brush.face[0].v[2]);
  
            XYZtoV(&v[1],&brush.face[1].v[0]);
            XYZtoV(&v[4],&brush.face[1].v[1]);
            XYZtoV(&v[5],&brush.face[1].v[2]);

            XYZtoV(&v[2],&brush.face[2].v[0]);
            XYZtoV(&v[5],&brush.face[2].v[1]);
            XYZtoV(&v[3],&brush.face[2].v[2]);
  
            XYZtoV(&v[3],&brush.face[3].v[0]);
            XYZtoV(&v[5],&brush.face[3].v[1]);
            XYZtoV(&v[4],&brush.face[3].v[2]);

            XYZtoV(&v[0],&brush.face[4].v[0]);
            XYZtoV(&v[1],&brush.face[4].v[1]);
            XYZtoV(&v[2],&brush.face[4].v[2]);

            MakeBrush(&brush);
            N++;
          }
        }
      }
    } // endif AddHints==1
    CloseFuncGroup();
  }

} // end MapBrushes

//=============================================================
void GenerateMap()
{
  extern void MapOut(int,int,NODE *,TRI *);
  extern bool SingleBrushSelected;
  int  ntri;

  if(!ValidSurface()) return;
        /*
  ghCursorCurrent = LoadCursor(NULL,IDC_WAIT);
  SetCursor(ghCursorCurrent);
        */
#if 0
    if(SingleBrushSelected) g_FuncTable.m_pfnDeleteSelection();
#endif

  GenerateXYZ();
  ntri = NH*NV*2;

  if(Game==QUAKE3 && UsePatches != 0)
    MapPatches();

  if(Decimate > 0 && (Game != QUAKE3 || UsePatches==0) )
  {
    MapOut(gNumNodes,gNumTris,gNode,gTri);
                /*
    ghCursorCurrent = ghCursorDefault;
    SetCursor(ghCursorCurrent);
                */
    return;
  }

  contents = 0;
  // HL doesn't have detail property
  if((Game != HALFLIFE) && UseDetail) contents += CONTENTS_DETAIL;
  // HL and Q3 don't have ladder property
  if((Game != HALFLIFE && Game != QUAKE3) && UseLadder) contents += CONTENTS_LADDER;
  // Genesis requires solid property to be set explicitly
  if(Game == GENESIS3D) contents |= CONTENTS_SOLID;
  // Heretic 2 uses different sounds (in surface props) for different texture types
  if(Game == HERETIC2)
  {
    surface[0] = GetDefSurfaceProps(Texture[Game][0]);
    surface[1] = GetDefSurfaceProps(Texture[Game][1]);
    surface[2] = GetDefSurfaceProps(Texture[Game][2]);
  }
  else
  {
    surface[0] = 0;
    surface[1] = 0;
    surface[2] = 0;
  }
  if(Game!=QUAKE3 || UsePatches == 0)
    MapBrushes();

        /*
  ghCursorCurrent = ghCursorDefault;
  SetCursor(ghCursorCurrent);
        */
}

//=============================================================
void GenerateXYZ()
{
  extern void MakeDecimatedMap(int *, int *, NODE **, TRI **);
  double zl, zu;
  double wh, wv;
  int NHalfcycles;
  double a,v,h,ha,va;
  double delta, dr, rate;
  double range, maxrange;
  double r;
  int i, j, k, N;
  int i0, i1, j0, j1;
  int ii, jj;

//  FILE *f;
//  char CSV[64];

  if(!ValidSurface()) return;

  srand(1);
  srand(RandomSeed);

  dh = (Hur-Hll)/NH;
  dv = (Vur-Vll)/NV;
  
  // H & V
  for(i=0; i<=NH; i++)
  {
    for(j=0;j<=NV;j++)
    {
      switch(Plane)
      {
      case PLANE_XZ0:
      case PLANE_XZ1:
        xyz[i][j].p[0] = Hll + i*dh;
        xyz[i][j].p[2] = Vll + j*dv;
        break;
      case PLANE_YZ0:
      case PLANE_YZ1:
        xyz[i][j].p[1] = Hll + i*dh;
        xyz[i][j].p[2] = Vll + j*dv;
        break;
      default:
        xyz[i][j].p[0] = Hll + i*dh;
        xyz[i][j].p[1] = Vll + j*dv;
      }
    }
  }

  if(WaveType == WAVE_BITMAP)
    GenerateBitmapMapping();
        /*
  else if(WaveType == WAVE_FORMULA)
    DoFormula();
        */
  else
  {
    // Initialize Z values using bilinear interpolation
    for(i=0; i<=NH; i++)
    {
      zl = Z00 + i*(Z10 - Z00)/NH;
      zu = Z01 + i*(Z11 - Z01)/NH;
      switch(Plane)
      {
      case PLANE_XZ0:
      case PLANE_XZ1:
        for(j=0; j<=NV; j++)
          xyz[i][j].p[1] = zl + j*(zu-zl)/NV;
        break;
      case PLANE_YZ0:
      case PLANE_YZ1:
        for(j=0; j<=NV; j++)
          xyz[i][j].p[0] = zl + j*(zu-zl)/NV;
        break;
      default:
        for(j=0; j<=NV; j++)
          xyz[i][j].p[2] = zl + j*(zu-zl)/NV;
      }
    }
  }
  
  switch(WaveType)
  {
  case WAVE_COS_SIN:
    if(FixBorders)
    {
      NHalfcycles = (int)((Hur-Hll)/(WaveLength/2.));
      NHalfcycles = max(NHalfcycles,1);
      wh = 2.*(Hur-Hll)/NHalfcycles;
      NHalfcycles = (int)((Vur-Vll)/(WaveLength/2.));
      wv = 2.*(Vur-Vll)/NHalfcycles;
      NHalfcycles = max(NHalfcycles,1);
      i0 = 1;
      i1 = NH-1;
      j0 = 1;
      j1 = NV-1;
    }
    else
    {
      wh = WaveLength;
      wv = WaveLength;
      i0 = 0;
      i1 = NH;
      j0 = 0;
      j1 = NV;
    }
    
    for(i=i0; i<=i1; i++)
    {
      h  = Hll + i*dh;
      ha = ((h-Hll)/wh)*2.*PI - PI/2.;
      for(j=j0; j<=j1; j++)
      {
        v  = Vll + j*dv;
        va = ((v-Vll)/wv)*2.*PI;
        a = Amplitude * cos( ha ) * sin( va );
        switch(Plane)
        {
        case PLANE_XY1:
          xyz[i][j].p[2] -= a;
          break;
        case PLANE_XZ0:
          xyz[i][j].p[1] += a;
          break;
        case PLANE_XZ1:
          xyz[i][j].p[1] -= a;
          break;
        case PLANE_YZ0:
          xyz[i][j].p[0] += a;
          break;
        case PLANE_YZ1:
          xyz[i][j].p[0] -= a;
          break;
        default:
          xyz[i][j].p[2] += a;
        }
      }
    }
    break;
  case WAVE_HCYLINDER:
    for(i=0; i<=NH; i++)
    {
      h  = Hll + i*dh;
      ha = ((h-Hll)/WaveLength)*2.*PI - PI/2.;
      for(j=0; j<=NV; j++)
      {
        a = Amplitude * cos( ha );
        switch(Plane)
        {
        case PLANE_XY1:
          xyz[i][j].p[2] -= a;
          break;
        case PLANE_XZ0:
          xyz[i][j].p[1] += a;
          break;
        case PLANE_XZ1:
          xyz[i][j].p[1] -= a;
          break;
        case PLANE_YZ0:
          xyz[i][j].p[0] += a;
          break;
        case PLANE_YZ1:
          xyz[i][j].p[0] -= a;
          break;
        default:
          xyz[i][j].p[2] += a;
        }
      }
    }
    break;
  case WAVE_VCYLINDER:
    for(i=0; i<=NH; i++)
    {
      h  = Hll + i*dh;
      for(j=0; j<=NV; j++)
      {
        v  = Vll + j*dv;
        va = ((v-Vll)/WaveLength)*2.*PI;
        a = Amplitude * sin( va );
        switch(Plane)
        {
        case PLANE_XY1:
          xyz[i][j].p[2] -= a;
          break;
        case PLANE_XZ0:
          xyz[i][j].p[1] += a;
          break;
        case PLANE_XZ1:
          xyz[i][j].p[1] -= a;
          break;
        case PLANE_YZ0:
          xyz[i][j].p[0] += a;
          break;
        case PLANE_YZ1:
          xyz[i][j].p[0] -= a;
          break;
        default:
          xyz[i][j].p[2] += a;
        }
      }
    }
    break;
  case WAVE_ROUGH_ONLY:
    PlasmaCloud();
    break;
  }
  
  if(WaveType != WAVE_ROUGH_ONLY)
  {
    // Fixed values
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        if(xyz[i][j].fixed)
        {
          switch(Plane)
          {
          case PLANE_XZ0:
          case PLANE_XZ1:
            xyz[i][j].p[1] = xyz[i][j].fixed_value;
            break;
          case PLANE_YZ0:
          case PLANE_YZ1:
            xyz[i][j].p[0] = xyz[i][j].fixed_value;
            break;
          default:
            xyz[i][j].p[2] = xyz[i][j].fixed_value;
          }
          
          if(xyz[i][j].range > 0)
          {
            maxrange = pow(xyz[i][j].range,2); // so we don't have to do sqrt's
            i0 = i - (int)( floor(xyz[i][j].range/dh - 0.5) + 1 );
            i1 = i + i - i0;
            j0 = j - (int)( floor(xyz[i][j].range/dv - 0.5) + 1 );
            j1 = j + j - j0;
            if(FixBorders)
            {
              i0 = max(i0,1);
              i1 = min(i1,NH-1);
              j0 = max(j0,1);
              j1 = min(j1,NV-1);
            }
            else
            {
              i0 = max(i0,0);
              i1 = min(i1,NH);
              j0 = max(j0,0);
              j1 = min(j1,NV);
            }
            for(ii=i0; ii<=i1; ii++)
            {
              for(jj=j0; jj<=j1; jj++)
              {
                if(ii==i && jj==j) continue;
                range = pow( dh*(i-ii), 2) + pow( dv*(j-jj), 2);
                if(range > maxrange) continue;
                dr = sqrt(range/maxrange);
                rate = max(-30.,min(xyz[i][j].rate,30.));
                if(rate < -1.)
                {
                  delta = pow((1.-dr),-rate+1.);
                }
                else if(rate < 0.)
                {
                  delta = (1+rate)*0.5*(cos(dr*PI)+1.0) -
                    rate*pow((1.-dr),2);
                }
                else if(rate == 0.)
                {
                  delta = 0.5*(cos(dr*PI)+1.0);
                }
                else if(rate <= 1.)
                {
                  delta = (1.-rate)*0.5*(cos(dr*PI)+1.0) +
                    rate*(1.-pow(dr,2));
                }
                else
                {
                  delta = 1.-pow(dr,rate+1);
                }
                switch(Plane)
                {
                case PLANE_XZ0:
                case PLANE_XZ1:
                  xyz[ii][jj].p[1] += (xyz[i][j].p[1] - xyz[ii][jj].p[1])*delta;
                  break;
                case PLANE_YZ0:
                case PLANE_YZ1:
                  xyz[ii][jj].p[0] += (xyz[i][j].p[0] - xyz[ii][jj].p[0])*delta;
                  break;
                default:
                  xyz[ii][jj].p[2] += (xyz[i][j].p[2] - xyz[ii][jj].p[2])*delta;
                }
              }
            }
          }
        }
      }
    }
  }

  if((Roughness > 0.) && (WaveType != WAVE_ROUGH_ONLY) )
  {
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        if(CanEdit(i,j) && !xyz[i][j].fixed)
        {
          switch(Plane)
          {
          case PLANE_XZ0:
          case PLANE_XZ1:
            xyz[i][j].p[1] += -Roughness/2. + Roughness*((double)rand()/(double)RAND_MAX);
            break;
          case PLANE_YZ0:
          case PLANE_YZ1:
            xyz[i][j].p[0] += -Roughness/2. + Roughness*((double)rand()/(double)RAND_MAX);
            break;
          default:
            xyz[i][j].p[2] += -Roughness/2. + Roughness*((double)rand()/(double)RAND_MAX);
          }
        }
        else
          r = rand();    // We still get a random number, so that fixing points
                           // doesn't change the sequence.

      }
    }
  }

  for(i=0; i<=NH; i++)
  {
    for(j=0; j<=NV; j++)
    {
      for(k=0; k<3; k++)
      {
        xyz[i][j].p[k] = Nearest(xyz[i][j].p[k],2.0);
      }
    }
  }

  // Find minima and maxima
  switch(Plane)
  {
  case PLANE_XZ0:
  case PLANE_XZ1:
    xmin = Hll;
    xmax = Hur;
    zmin = Vll;
    zmax = Vur;
    ymin = xyz[0][0].p[1];
    ymax = ymin;
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        ymin = min(ymin,xyz[i][j].p[1]);
        ymax = max(ymax,xyz[i][j].p[1]);
      }
    }
    break;
  case PLANE_YZ0:
  case PLANE_YZ1:
    ymin = Hll;
    ymax = Hur;
    zmin = Vll;
    zmax = Vur;
    xmin = xyz[0][0].p[0];
    xmax = ymin;
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        xmin = min(xmin,xyz[i][j].p[0]);
        xmax = max(xmax,xyz[i][j].p[0]);
      }
    }
    break;
    break;
  default:
    xmin = Hll;
    xmax = Hur;
    ymin = Vll;
    ymax = Vur;
    zmin = xyz[0][0].p[2];
    zmax = zmin;
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        zmin = min(zmin,xyz[i][j].p[2]);
        zmax = max(zmax,xyz[i][j].p[2]);
      }
    }
  }
  
  xmin = Nearest(xmin,2.);
  xmax = Nearest(xmax,2.);
  ymin = Nearest(ymin,2.);
  ymax = Nearest(ymax,2.);
  zmin = Nearest(zmin,2.);
  zmax = Nearest(zmax,2.);
  
  switch(Plane)
  {
  case PLANE_XY1:
    backface = AtLeast(zmax+32.,32.);
    break;
  case PLANE_XZ0:
    backface = NoMoreThan(ymin-32.,32.);
    break;
  case PLANE_XZ1:
    backface = AtLeast(ymax+32.,32.);
    break;
  case PLANE_YZ0:
    backface = NoMoreThan(xmin-32.,32.);
    break;
  case PLANE_YZ1:
    backface = AtLeast(xmax+32.,32.);
    break;
  default:
    backface = NoMoreThan(zmin-32.,32.);
  }

  if(gNode)
  {
    free(gNode);
    free(gTri);
    gNode = (NODE *)NULL;
    gTri  = (TRI *)NULL;
  }
  if(Decimate > 0 && (Game != QUAKE3 || UsePatches==0) )
  {
    MakeDecimatedMap(&gNumNodes,&gNumTris,&gNode,&gTri);
  }
  else
  {
    gNumNodes = (NH+1)*(NV+1);
    gNumTris  = NH*NV*2;
    gNode = (NODE *) malloc(gNumNodes * sizeof(NODE));
    gTri = (TRI *) malloc(gNumTris * sizeof(TRI));

    for(i=0,N=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++, N++)
      {
        gNode[N].used = 1;
        gNode[N].p[0] = (float)xyz[i][j].p[0];
        gNode[N].p[1] = (float)xyz[i][j].p[1];
        gNode[N].p[2] = (float)xyz[i][j].p[2];
      }
    }
    
    for(i=0; i<NH; i++)
    {
      for(j=0; j<NV; j++)
      {
        k = i*NV*2 + j*2;
        if( (i+j) % 2 )
        {
          switch(Plane)
          {
          case PLANE_XY1:
          case PLANE_XZ1:
          case PLANE_YZ1:
            gTri[k  ].v[0] = i*(NV+1)+j;
            gTri[k  ].v[1] = (i+1)*(NV+1)+j+1;
            gTri[k  ].v[2] = (i+1)*(NV+1)+j;
            gTri[k+1].v[0] = i*(NV+1)+j;
            gTri[k+1].v[1] = i*(NV+1)+j+1;
            gTri[k+1].v[2] = (i+1)*(NV+1)+j+1;
            break;
          default:
            gTri[k  ].v[0] = i*(NV+1)+j;
            gTri[k  ].v[1] = (i+1)*(NV+1)+j;
            gTri[k  ].v[2] = (i+1)*(NV+1)+j+1;
            gTri[k+1].v[0] = i*(NV+1)+j;
            gTri[k+1].v[1] = (i+1)*(NV+1)+j+1;
            gTri[k+1].v[2] = i*(NV+1)+j+1;
          }
        }
        else
        {
          switch(Plane)
          {
          case PLANE_XY1:
          case PLANE_XZ1:
          case PLANE_YZ1:
            gTri[k  ].v[0] = i*(NV+1)+j;
            gTri[k  ].v[1] = i*(NV+1)+j+1;
            gTri[k  ].v[2] = (i+1)*(NV+1)+j;
            gTri[k+1].v[0] = (i+1)*(NV+1)+j;
            gTri[k+1].v[1] = i*(NV+1)+j+1;
            gTri[k+1].v[2] = (i+1)*(NV+1)+j+1;
            break;
          default:
            gTri[k  ].v[0] = i*(NV+1)+j;
            gTri[k  ].v[1] = (i+1)*(NV+1)+j;
            gTri[k  ].v[2] = i*(NV+1)+j+1;
            gTri[k+1].v[0] = (i+1)*(NV+1)+j;
            gTri[k+1].v[1] = (i+1)*(NV+1)+j+1;
            gTri[k+1].v[2] = i*(NV+1)+j+1;
          }
        }
      }
    }
  }
/*
  sprintf(CSV,"csv%03d.csv",Decimate);
  f = fopen(CSV,"w");
  for(i=0; i<gNumNodes; i++)
  {
    if(gNode[i].used)
      fprintf(f,"%g,%g,%g\n",gNode[i].p[0],gNode[i].p[1],gNode[i].p[2]);
  }
  fclose(f);
*/
  for(i=0; i<gNumTris; i++)
    PlaneFromPoints(gNode[gTri[i].v[0]].p,
                    gNode[gTri[i].v[1]].p,
                    gNode[gTri[i].v[2]].p,
                    &gTri[i].plane);

  // Hydra: snap-to-grid begin
  if (SnapToGrid > 0)
  {
    for(i=0; i<NH; i++)
    {
      for(j=0; j<NV; j++)
      {
        switch(Plane)
        {
        case PLANE_XZ0:
        case PLANE_XZ1:
          xyz[i][j].p[1] = CalculateSnapValue(xyz[i][j].p[1]);
          break;
        case PLANE_YZ0:
        case PLANE_YZ1:
          xyz[i][j].p[0] = CalculateSnapValue(xyz[i][j].p[0]);
          break;
        default:
          xyz[i][j].p[2] = CalculateSnapValue(xyz[i][j].p[2]);
        }
      }
    }
  }
  // Hydra: snap-to-grid end
}
//=============================================================
double Nearest(double x, double dx)
{
  double xx;

  xx = (double)(floor(x/dx - 0.5)+1.)*dx;
  if(fabs(xx) < dx/2) xx = 0.;
  return xx;
}
//=============================================================
double NoMoreThan(double x, double dx)
{
  double xx;

  xx = (double)(floor(x/dx - 0.5)+1.)*dx;
  if(xx > x) xx -= dx;
  return xx;
}
//=============================================================
double AtLeast(double x, double dx)
{
  double xx;

  xx = (double)(floor(x/dx - 0.5)+1.)*dx;
  if(xx < x) xx += dx;
  return xx;
}
//=============================================================
double LessThan(double x,double dx)
{
  double xx;

  xx = (double)(floor(x/dx - 0.5)+1.)*dx;
  if(xx >= x) xx -= dx;
  return xx;
}
//=============================================================
double MoreThan(double x,double dx)
{
  double xx;

  xx = (double)(floor(x/dx - 0.5)+1.)*dx;
  while(xx <= x)
    xx += dx;
  return xx;
}
//=============================================================
void SubdividePlasma(int i0,int j0,int i1,int j1)
{
  int i, j;
  double z1, z2;
  double r;      // NOTE: This is used to keep the random number sequence the same
                 //       when we fix a point. If we did NOT do this, then simply
                 //       fixing a point at its current value would change the entire
                 //       surface.

  i = (i0+i1)/2;
  j = (j0+j1)/2;
  if(i1 > i0+1)
  {
    if(!xyz[i][j0].done)
    {
      xyz[i][j0].pp[2] = xyz[i0][j0].pp[2] + 
        (xyz[i1][j0].pp[2] - xyz[i0][j0].pp[2])*(double)(i-i0)/(double)(i1-i0) +
        ((double)(i-i0))*(-Roughness/2. + Roughness*((double)rand()/(double)RAND_MAX));
      xyz[i][j0].done = 1;
    }
    else
      r = rand();
    if((j1 > j0) && (!xyz[i][j1].done) )
    {
      xyz[i][j1].pp[2] = xyz[i0][j1].pp[2] + 
        (xyz[i1][j1].pp[2] - xyz[i0][j1].pp[2])*(double)(i-i0)/(double)(i1-i0) +
        ((double)(i-i0))*(-Roughness/2. + Roughness*((double)rand()/(double)RAND_MAX));
      xyz[i][j1].done = 1;
    }
    else
      r = rand();
  }
  if(j1 > j0 + 1)
  {
    if(!xyz[i0][j].done)
    {
      xyz[i0][j].pp[2] = xyz[i0][j0].pp[2] + 
        (xyz[i0][j1].pp[2] - xyz[i0][j0].pp[2])*(double)(j-j0)/(double)(j1-j0) +
        ((double)(j-j0))*(-Roughness/2. + Roughness*((double)rand()/(double)RAND_MAX));
      xyz[i0][j].done = 1;
    }
    else
      r = rand();
    if((i1 > i0) && (!xyz[i1][j].done))
    {
      xyz[i1][j].pp[2] = xyz[i1][j0].pp[2] + 
        (xyz[i1][j1].pp[2] - xyz[i1][j0].pp[2])*(double)(j-j0)/(double)(j1-j0) +
        ((double)(j-j0))*(-Roughness/2. + Roughness*((double)rand()/(double)RAND_MAX));
      xyz[i1][j].done = 1;
    }
    else
      r = rand();
  }
  if((i1 > i0+1) && (j1 > j0+1))
  {
    if(!xyz[i][j].done)
    {
      z1 = xyz[i0][j].pp[2] +
        (xyz[i1][j].pp[2] - xyz[i0][j].pp[2])*(double)(i-i0)/(double)(i1-i0);
      z2 = xyz[i][j0].pp[2] +
        (xyz[i][j1].pp[2] - xyz[i][j0].pp[2])*(double)(j-j0)/(double)(j1-j0);
      xyz[i][j].pp[2] = (z1+z2)/2. +
        ((double)(i-i0))*(-Roughness/2. + Roughness*((double)rand()/(double)RAND_MAX));
      xyz[i][j].done = 1;
    }
    else
      r = rand();
  }
  if(i > i0+1 || j > j0+1)
    SubdividePlasma(i0,j0,i,j);
  if(i1 > i+1 || j > j0+1)
    SubdividePlasma(i,j0,i1,j);
  if(i > i0+1 || j1 > j0+1)
    SubdividePlasma(i0,j,i,j1);
  if(i1 > i+1 || j1 > j0+1)
    SubdividePlasma(i,j,i1,j1);
}
//==================================================================================
void PlasmaCloud()
{
  int i, j;
  /* use pp[2] values until done to avoid messing with a bunch of 
     switch statements */

  for(i=0; i<=NH; i++)
  {
    for(j=0; j<=NV; j++)
    {
      if(FixedPoint(i,j))
        xyz[i][j].done = 1;
      else
        xyz[i][j].done = 0;
    }
  }

  switch(Plane)
  {
  case PLANE_XZ0:
  case PLANE_XZ1:
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        if(xyz[i][j].fixed)
          xyz[i][j].pp[2] = xyz[i][j].fixed_value;
        else
          xyz[i][j].pp[2] = xyz[i][j].p[1];
      }
    }
    break;
  case PLANE_YZ0:
  case PLANE_YZ1:
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        if(xyz[i][j].fixed)
          xyz[i][j].pp[2] = xyz[i][j].fixed_value;
        else
          xyz[i][j].pp[2] = xyz[i][j].p[0];
      }
    }
    break;
  default:
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        if(xyz[i][j].fixed)
          xyz[i][j].pp[2] = xyz[i][j].fixed_value;
        else
          xyz[i][j].pp[2] = xyz[i][j].p[2];
      }
    }
    break;
  }
  SubdividePlasma(0,0,NH,NV);
  switch(Plane)
  {
  case PLANE_XZ0:
  case PLANE_XZ1:
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        xyz[i][j].p[1] = xyz[i][j].pp[2];
      }
    }
    break;
  case PLANE_YZ0:
  case PLANE_YZ1:
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        xyz[i][j].p[0] = xyz[i][j].pp[2];
      }
    }
    break;
  default:
    for(i=0; i<=NH; i++)
    {
      for(j=0; j<=NV; j++)
      {
        xyz[i][j].p[2] = xyz[i][j].pp[2];
      }
    }
    break;
  }
}
//===========================================================================
bool FixedPoint(int i, int j)
{
  if(xyz[i][j].fixed) return TRUE;
  return !CanEdit(i,j);
}
//===========================================================================
bool CanEdit(int i, int j)
{
  if(FixBorders && ( (WaveType==WAVE_COS_SIN) || (WaveType==WAVE_ROUGH_ONLY) ) )
  {
    if(i== 0) return FALSE;
    if(i==NH) return FALSE;
    if(j== 0) return FALSE;
    if(j==NV) return FALSE;
  }
  if(i== 0 && j== 0) return FALSE;
  if(i==NH && j== 0) return FALSE;
  if(i== 0 && j==NV) return FALSE;
  if(i==NH && j==NV) return FALSE;
  return TRUE;
}
/*============================================================================
  TriangleFromPoint
  Determines which triangle in the gTri array bounds the input point. Doesn't
  do anything special with border points.
*/
int TriangleFromPoint(double x, double y)
{
  int j, tri;

  if(!gTri) return -1;

  for(j=0, tri=-1; j<gNumTris && tri==-1; j++)
  {
    if( side(x,y,
      gNode[gTri[j].v[0]].p[0],gNode[gTri[j].v[0]].p[1],
      gNode[gTri[j].v[1]].p[0],gNode[gTri[j].v[1]].p[1]) < 0. ) continue;
    if( side(x,y,
      gNode[gTri[j].v[1]].p[0],gNode[gTri[j].v[1]].p[1],
      gNode[gTri[j].v[2]].p[0],gNode[gTri[j].v[2]].p[1]) < 0. ) continue;
    if( side(x,y,
      gNode[gTri[j].v[2]].p[0],gNode[gTri[j].v[2]].p[1],
      gNode[gTri[j].v[0]].p[0],gNode[gTri[j].v[0]].p[1]) < 0. ) continue;
    tri = j;
  }

  return tri;
}
/*============================================================================
  PlayerStartZ
  Determines minimum height to place the player start such that he doesn't
  intersect any surface brushes.
*/
int PlayerStartZ(double x, double y)
{
  int k,t[5];
  double z, zt;

  if(!gTri) return (int)zmax;

  t[0] = TriangleFromPoint(x,y);
  t[1] = TriangleFromPoint(x+PlayerBox[Game].x[0],y+PlayerBox[Game].y[0]);
  t[2] = TriangleFromPoint(x+PlayerBox[Game].x[0],y+PlayerBox[Game].y[1]);
  t[3] = TriangleFromPoint(x+PlayerBox[Game].x[1],y+PlayerBox[Game].y[0]);
  t[4] = TriangleFromPoint(x+PlayerBox[Game].x[1],y+PlayerBox[Game].y[1]);
  z = zmin;
  for(k=0; k<5; k++)
  {
    zt = (gTri[t[k]].plane.dist -
          gTri[t[k]].plane.normal[0]*x -
          gTri[t[k]].plane.normal[1]*y   )/
          gTri[t[k]].plane.normal[2];
    z = max(z,zt);
  }
  return (int)(AtLeast(z,2.) - PlayerBox[Game].z[0]);
}
//=============================================================
void XYZtoV(XYZ *xyz, vec3 *v)
{
  v[0][0] = (vec)Nearest(xyz->p[0],2.);
  v[0][1] = (vec)Nearest(xyz->p[1],2.);
  v[0][2] = (vec)Nearest(xyz->p[2],2.);
}

//=============================================================
scene::Node* MakePatch(void)
{
  scene::Node* patch = Patch_AllocNode();
#if 0
  patch->m_patch->SetShader(Texture[Game][0]);
#endif
  Node_getTraversable(h_worldspawn)->insert(patch);
  return patch;
}

//=============================================================
void MakeBrush(BRUSH *brush)
{
  NodePtr node(Brush_AllocNode());

#if 0
  for(int i=0; i<brush->NumFaces; i++)
  {
    _QERFaceData QERFaceData;
    if(!strncmp(brush->face[i].texture, "textures/", 9))
      strcpy(QERFaceData.m_TextureName,brush->face[i].texture);
    else 
    {
      strcpy(QERFaceData.m_TextureName,"textures/");
      strcpy(QERFaceData.m_TextureName+9,brush->face[i].texture);  
    }
    QERFaceData.m_nContents = brush->face[i].Contents;
    QERFaceData.m_nFlags    = brush->face[i].Surface;
    QERFaceData.m_nValue    = brush->face[i].Value;
    QERFaceData.m_fShift[0] = brush->face[i].Shift[0];
    QERFaceData.m_fShift[1] = brush->face[i].Shift[1];
    QERFaceData.m_fRotate   = brush->face[i].Rotate;
    QERFaceData.m_fScale[0] = brush->face[i].Scale[0];
    QERFaceData.m_fScale[1] = brush->face[i].Scale[1];
    QERFaceData.m_v1[0]     = brush->face[i].v[0][0];
    QERFaceData.m_v1[1]     = brush->face[i].v[0][1];
    QERFaceData.m_v1[2]     = brush->face[i].v[0][2];
    QERFaceData.m_v2[0]     = brush->face[i].v[1][0];
    QERFaceData.m_v2[1]     = brush->face[i].v[1][1];
    QERFaceData.m_v2[2]     = brush->face[i].v[1][2];
    QERFaceData.m_v3[0]     = brush->face[i].v[2][0];
    QERFaceData.m_v3[1]     = brush->face[i].v[2][1];
    QERFaceData.m_v3[2]     = brush->face[i].v[2][2];
    QERFaceData.m_bBPrimit  = false;
    (g_FuncTable.m_pfnAddFaceData)(vp,&QERFaceData);
  }
#endif

  Node_getTraversable(h_func_group)->insert(node);
}
//=============================================================
void OpenFuncGroup()
{
  h_func_group = GlobalEntityCreator().createEntity("func_group");
  h_func_group->IncRef();
  if(AddTerrainKey)
    h_func_group->m_entity->setkeyvalue("terrain", "1");
}
//=============================================================
void CloseFuncGroup()
{
  h_func_group->DecRef();
  if (g_FuncTable.m_pfnSysUpdateWindows != NULL)
    g_FuncTable.m_pfnSysUpdateWindows (W_ALL);
}