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);
}
bspLogger.WriteLine("No of brushsides: " + brushSideCount);
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.NumberOfSides; i++)
{
Q3BSPBrushSide brushSide = brushSides[brush.StartBrushSide + i];
Plane plane = planes[brushSide.PlaneIndex];
float startDistance = 0, endDistance = 0;
if (cd.type == Q3BSPCollisionType.Ray)
{
startDistance = Vector3.Dot(cd.startPosition, plane.Normal) - plane.D;
endDistance = Vector3.Dot(cd.endPosition, plane.Normal) - plane.D;
}
else if (cd.type == Q3BSPCollisionType.Sphere)
{
startDistance = Vector3.Dot(cd.startPosition, plane.Normal) - (plane.D + cd.sphereRadius);
endDistance = Vector3.Dot(cd.endPosition, plane.Normal) - (plane.D + cd.sphereRadius);
}
else if (cd.type == Q3BSPCollisionType.Box)
{
Vector3 offset = new Vector3();
if (plane.Normal.X < 0)
{
offset.X = cd.boxMaximums.X;
}
else
{
offset.X = cd.boxMinimums.X;
}
if (plane.Normal.Y < 0)
{
offset.Y = cd.boxMaximums.Y;
}
else
{
offset.Y = cd.boxMinimums.Y;
}
if (plane.Normal.Z < 0)
{
offset.Z = cd.boxMaximums.Z;
}
else
{
offset.Z = cd.boxMinimums.Z;
}
startDistance = (cd.startPosition.X + offset.X) * plane.Normal.X +
(cd.startPosition.Y + offset.Y) * plane.Normal.Y +
(cd.startPosition.Z + offset.Z) * plane.Normal.Z -
plane.D;
endDistance = (cd.endPosition.X + offset.X) * plane.Normal.X +
(cd.endPosition.Y + offset.Y) * plane.Normal.Y +
(cd.endPosition.Z + offset.Z) * plane.Normal.Z -
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;
}
}
}
