private bool LoadBrushSideLump(Q3BSPDirEntry dir, BinaryReader fileReader)
{
int brushSideCount = dir.Length / Q3BSPConstants.sizeBrushSide;
brushSides = new Q3BSPBrushSide[brushSideCount];
for (int i = 0; i < brushSideCount; i++)
{
brushSides[i] = Q3BSPBrushSide.FromStream(fileReader);
}
return(true);
}
private void CheckBrush(ref Q3BSPBrush brush, ref Q3BSPCollisionData cd)
{
float startFraction = -1.0f;
float endFraction = 1.0f;
bool startsOut = false;
bool endsOut = false;
for (int i = 0; i < brush.BrushSideCount; i++)
{
Q3BSPBrushSide brushSide = brushSides[brush.StartBrushSide + i];
Plane plane = planes[brushSide.PlaneIndex];
float startDistance = Vector3.Dot(cd.startPosition, plane.Normal) - plane.D;
float endDistance = Vector3.Dot(cd.endPosition, plane.Normal) - plane.D;
if (startDistance > 0)
{
startsOut = true;
}
if (endDistance > 0)
{
endsOut = true;
}
if (startDistance > 0 && endDistance > 0)
{
return;
}
if (startDistance <= 0 && endDistance <= 0)
{
continue;
}
if (startDistance > endDistance)
{
float fraction = (startDistance - Q3BSPConstants.epsilon) / (startDistance - endDistance);
if (fraction > startFraction)
{
startFraction = fraction;
}
}
else
{
float fraction = (startDistance + Q3BSPConstants.epsilon) / (startDistance - endDistance);
if (fraction < endFraction)
{
endFraction = fraction;
}
}
}
if (false == startsOut)
{
cd.startOutside = false;
if (false == endsOut)
{
cd.inSolid = true;
}
return;
}
if (startFraction < endFraction)
{
if (startFraction > -1.0f && startFraction < cd.ratio)
{
if (startFraction < 0)
{
startFraction = 0;
}
cd.ratio = startFraction;
}
}
}