if ((i2 == 0) || (Block.byId[i2] == null))
        {
          i3 = i1 + 1 & 0x3;
          i4 = i1 + 3 & 0x3;

          if (((m & 1 << i3) != 0) && (c(paramWorld.getTypeId(paramInt1 + Direction.a[i1] + Direction.a[i3], paramInt2, paramInt3 + Direction.b[i1] + Direction.b[i3]))))
          {
            paramWorld.setTypeIdAndData(paramInt1 + Direction.a[i1], paramInt2, paramInt3 + Direction.b[i1], this.id, 1 << i3);
          } else if (((m & 1 << i4) != 0) && (c(paramWorld.getTypeId(paramInt1 + Direction.a[i1] + Direction.a[i4], paramInt2, paramInt3 + Direction.b[i1] + Direction.b[i4]))))
          {
            paramWorld.setTypeIdAndData(paramInt1 + Direction.a[i1], paramInt2, paramInt3 + Direction.b[i1], this.id, 1 << i4);
          }
          else if (((m & 1 << i3) != 0) && (paramWorld.isEmpty(paramInt1 + Direction.a[i1] + Direction.a[i3], paramInt2, paramInt3 + Direction.b[i1] + Direction.b[i3])) && (c(paramWorld.getTypeId(paramInt1 + Direction.a[i3], paramInt2, paramInt3 + Direction.b[i3]))))
          {
            paramWorld.setTypeIdAndData(paramInt1 + Direction.a[i1] + Direction.a[i3], paramInt2, paramInt3 + Direction.b[i1] + Direction.b[i3], this.id, 1 << (i1 + 2 & 0x3));
          }
          else if (((m & 1 << i4) != 0) && (paramWorld.isEmpty(paramInt1 + Direction.a[i1] + Direction.a[i4], paramInt2, paramInt3 + Direction.b[i1] + Direction.b[i4])) && (c(paramWorld.getTypeId(paramInt1 + Direction.a[i4], paramInt2, paramInt3 + Direction.b[i4]))))
          {
            paramWorld.setTypeIdAndData(paramInt1 + Direction.a[i1] + Direction.a[i4], paramInt2, paramInt3 + Direction.b[i1] + Direction.b[i4], this.id, 1 << (i1 + 2 & 0x3));
          }
          else if (c(paramWorld.getTypeId(paramInt1 + Direction.a[i1], paramInt2 + 1, paramInt3 + Direction.b[i1]))) {
            paramWorld.setTypeIdAndData(paramInt1 + Direction.a[i1], paramInt2, paramInt3 + Direction.b[i1], this.id, 0);
          }
        }
        else if ((Block.byId[i2].material.j()) && (Block.byId[i2].b()))
        {
          paramWorld.setData(paramInt1, paramInt2, paramInt3, m | 1 << i1);
        }