Function CalcWater

Descent3/procedurals.cpp:876–931

  }
}
void CalcWater(int handle, int density) {
  int newh;
  int count = PROC_SIZE + 1;
  proc_struct *procedural = GameTextures[handle].procedural;

  int16_t *newptr = (int16_t *)procedural->proc2;
  int16_t *oldptr = (int16_t *)procedural->proc1;

  int x, y;

  // Do main block
  for (y = 1; y < (PROC_SIZE - 1); y++, count += 2) {
    for (x = 1; x < PROC_SIZE - 1; x++, count++) {
      newh = ((oldptr[count + PROC_SIZE] + oldptr[count - PROC_SIZE] + oldptr[count + 1] + oldptr[count - 1]) >> 1) -
             newptr[count];
      newptr[count] = newh - (newh >> density);
    }
  }
  int up, down, left, right;
  count = 0;
  for (y = 0; y < PROC_SIZE; y++) {
    if (y == 0)
      up = -((PROC_SIZE - 1) * PROC_SIZE);
    else
      up = PROC_SIZE;
    if (y == PROC_SIZE - 1)
      down = -((PROC_SIZE - 1) * PROC_SIZE);
    else
      down = PROC_SIZE;
    for (x = 0; x < PROC_SIZE; x++, count++) {
      if ((y != 0 && y != PROC_SIZE - 1) && x != 0 && x != PROC_SIZE - 1) {
        if (x == 1) {
          x = PROC_SIZE - 2;
          count += (PROC_SIZE - 3);
        }
        continue;
      }
      if (x == 0)
        left = -(PROC_SIZE - 1);
      else
        left = 1;

      if (x == PROC_SIZE - 1)
        right = -(PROC_SIZE - 1);
      else
        right = 1;
      newh = oldptr[count + down];
      newh += oldptr[count - up];
      newh += oldptr[count + right];
      newh += oldptr[count - left];
      newh >>= 1;
      newh -= newptr[count];
      newptr[count] = newh - (newh >> density);
    }
  }
}
void DrawWaterNoLight(int handle) {
  int dx, dy;