/Users/frarees/Desktop/rv1/source/mirror.cpp

#include "revolt.h"
#include "mirror.h"
#include "model.h"
#include "registry.h"
#include "level.h"

// globals

long MirrorPlaneNum;
MIRROR_PLANE *MirrorPlanes;
long MirrorType, MirrorAlpha;
float MirrorHeight, MirrorMul, MirrorAdd, MirrorDist;

// load mirror planes //

bool LoadMirrorPlanes(char *file)
{
  long i;
  MIRROR_PLANE_HEADER mph;
  MIRROR_PLANE_LOAD mpl;
  FILE *fp;

// open file for reading

  fp = fopen(file, "rb");
  if (!fp)
  {
    MirrorPlaneNum = 0;
    MirrorPlanes = NULL;
    return FALSE;
   }

// get header info, alloc coll memory

  fread(&mph, sizeof(mph), 1, fp);
  MirrorPlaneNum = mph.MirrorPlaneNum;
  MirrorPlanes = (MIRROR_PLANE*)malloc(MirrorPlaneNum * sizeof(MIRROR_PLANE));
  if (!MirrorPlanes)
  {
    MirrorPlaneNum = 0;
    return FALSE;
  }

// read in polys

  for (i = 0 ; i < MirrorPlaneNum ; i++)
  {
    fread(&mpl, sizeof(mpl), 1, fp);

    MirrorPlanes[i].Xmin = mpl.MinX - MIRROR_PLANE_OVERLAP;
    MirrorPlanes[i].Xmax = mpl.MaxX + MIRROR_PLANE_OVERLAP;

    MirrorPlanes[i].Zmin = mpl.MinZ - MIRROR_PLANE_OVERLAP;
    MirrorPlanes[i].Zmax = mpl.MaxZ + MIRROR_PLANE_OVERLAP;

    MirrorPlanes[i].Height = mpl.v0.v[Y];
  }

// close file

  fclose(fp);

// return OK

  return TRUE;
}

// free mirror planes //

void FreeMirrorPlanes(void)
{
  free(MirrorPlanes);
}

// set mirror params //

void SetMirrorParams(LEVELINFO *lev)
{
  MirrorType = lev->MirrorType;
  MirrorAlpha = (long)(lev->MirrorMix * 255) << 24;

  MirrorAdd = lev->MirrorIntensity * 256;
  MirrorDist = lev->MirrorDist;
  MirrorMul = (256 - MirrorAdd) / MirrorDist;
}

// get a mirror plane //

long GetMirrorPlane(VEC *pos)
{
  long i;

// loop thru all planes

  for (i = 0 ; i < MirrorPlaneNum ; i++)
  {
    if (pos->v[X] < MirrorPlanes[i].Xmin ||
      pos->v[X] > MirrorPlanes[i].Xmax ||
      pos->v[Z] < MirrorPlanes[i].Zmin ||
      pos->v[Z] > MirrorPlanes[i].Zmax)
        continue;

// found a good one

    MirrorHeight = MirrorPlanes[i].Height;
    return TRUE;
  }
  
// return none

  return FALSE;
}

---