private void ReadBrusheSides()
{
//Length of the Lump
int BrusheSideLength = Header.DirEntries[9].Length;
//Number of textures to load
int nbBrusheSides = BrusheSideLength / (sizeof(int) * 2);
BrusheSides = new brushside[nbBrusheSides];
for (int i = 0; i < nbBrusheSides; i++)
{
//plane
int plane = ReadInt();
//texture
int texture = ReadInt();
BrusheSides[i] = new brushside(plane, texture);
}
}
private void CheckBrush(brush pBrush)
{
float startFraction = -1.0f;
float endFraction = 1.0f;
bool startsout = false;
bool endsout = false;
for (int i = 0; i < pBrush.N_BrushSides; i++)
{
brushside brushside = file.BrusheSides[pBrush.BrushSide + i];
plane plane = file.Planes[brushside.Plane];
Vector3 planeNormal = BspRenderer.V3FromFloatArray(plane.Normal);
float startDistance = 0;
float endDistance = 0;
if (traceType == TT_RAY)
{
startDistance = Vector3.Dot(_inputStart, planeNormal) - plane.Dist;
endDistance = Vector3.Dot(_inputEnd, planeNormal) - plane.Dist;
}
else if (traceType == TT_SPHERE)
{
startDistance = Vector3.Dot(_inputStart, planeNormal) - (plane.Dist + traceRadius);
endDistance = Vector3.Dot(_inputEnd, planeNormal) - (plane.Dist + traceRadius);
}
else if (traceType == TT_BOX)
{
Vector3 offset = Vector3.Zero;
if (planeNormal.X < 0)
{
offset.X = traceMaxs.X;
}
else
{
offset.X = traceMins.X;
}
if (planeNormal.Y < 0)
{
offset.Y = traceMaxs.Y;
}
else
{
offset.Y = traceMins.Y;
}
if (planeNormal.Z < 0)
{
offset.Z = traceMaxs.Z;
}
else
{
offset.Z = traceMins.Z;
}
startDistance = (_inputStart.X + offset.X) * planeNormal.X + (_inputStart.Y + offset.Y) * planeNormal.Y + (_inputStart.Z + offset.Z) * planeNormal.Z - plane.Dist;
endDistance = (_inputEnd.X + offset.X) * planeNormal.X + (_inputEnd.Y + offset.Y) * planeNormal.Y + (_inputEnd.Z + offset.Z) * planeNormal.Z - plane.Dist;
}
if (startDistance > 0)
{
startsout = true;
}
if (endDistance > 0)
{
endsout = true;
}
// make sure the trace isnt on one side of the brush only
if (startDistance > 0 && endDistance > 0)
{
// both in front of the plane
return;
}
if (startDistance <= 0 && endDistance <= 0)
{
// both are behind the plane, it will get clipped by an other one
continue;
}
if (startDistance > endDistance)
{
// line is in the brush
float fraction = (startDistance - float.Epsilon) / (startDistance - endDistance);
if (fraction > startFraction)
{
startFraction = fraction;
}
}
else
{
//line is leaving the brush
float fraction = (startDistance + float.Epsilon) / (startDistance - endDistance);
if (fraction < endFraction)
{
endFraction = fraction;
}
}
}
if (startsout == false)
{
outputStartsOut = false;
if (endsout)
{
outputAllSolid = true;
}
return;
}
if (startFraction < endFraction)
{
if (startFraction > -1 && startFraction < outputFraction)
{
if (startFraction < 0)
{
startFraction = 0;
}
outputFraction = startFraction;
}
}
}
