/*
* ==============
* =
* = PTR_SightTraverse
* =
* ==============
*/
public static bool PTR_SightTraverse(p_local.intercept_t in_)
{
if (in_ == null)
{
return(true);
}
r_local.line_t li;
int slope;
li = in_.line;
//
// crosses a two sided line
//
p_maputl.P_LineOpening(li);
if (p_maputl.openbottom >= p_maputl.opentop) // quick test for totally closed doors
{
return(false); // stop
}
if (li.frontsector.floorheight != li.backsector.floorheight)
{
slope = d_main.FixedDiv(p_maputl.openbottom - sightzstart, in_.frac);
if (slope > bottomslope)
{
bottomslope = slope;
}
}
if (li.frontsector.ceilingheight != li.backsector.ceilingheight)
{
slope = d_main.FixedDiv(p_maputl.opentop - sightzstart, in_.frac);
if (slope < topslope)
{
topslope = slope;
}
}
if (topslope <= bottomslope)
{
return(false); // stop
}
return(true); // keep going
}
public virtual bool function(p_local.intercept_t in_)
{
return(false);
}