/// <summary>
/// Determines whether the given line intersects the current instance of <see cref="PlaneF"/>.
/// </summary>
/// <param name="line">The line to check.</param>
/// <param name="scale">When the method completes, contains the line and plane intersection.</param>
/// <returns>True if the given line intersects the current instance of <see cref="PlaneF"/>; False otherwise.</returns>
public bool Intersects(ref Line3F line, out float scale)
{
scale = 0;
float d1 = A * line.Start.X + B * line.Start.Y + C * line.Start.Z + D;
float d2 = A * line.End.X + B * line.End.Y + C * line.End.Z + D;
if (d1 == d2)
{
return(false);
}
if (d1 > 0.0f && d2 > 0.0f)
{
return(false);
}
if (d1 < 0.0f && d2 < 0.0f)
{
return(false);
}
float fraction = (d1 / (d1 - d2));
if (fraction < 0.0f || fraction > 1.0f)
{
return(false);
}
scale = fraction;
return(true);
}
public bool Equals( Line3F v, float epsilon )
{
if( !Start.Equals( v.Start, epsilon ) )
return false;
if( !End.Equals( v.End, epsilon ) )
return false;
return true;
}
public bool Intersects(Line3F line)
{
Vector3F s = line.Start - Origin;
Vector3F e = line.End - Origin;
Vector3F r = e - s;
float a = Vector3F.Dot(-s, r);
if (a <= 0)
{
return(Vector3F.Dot(s, s) < Radius * Radius);
}
else if (a >= Vector3F.Dot(r, r))
{
return(Vector3F.Dot(e, e) < Radius * Radius);
}
else
{
r = s + (a / (Vector3F.Dot(r, r))) * r;
return(Vector3F.Dot(r, r) < Radius * Radius);
}
}
public bool Intersects(Line3F line)
{
float scale;
return(Intersects(line, out scale));
}
/// <summary>
/// Determines whether the given line intersects the current instance of <see cref="PlaneF"/>.
/// </summary>
/// <param name="line">The line to check.</param>
/// <param name="scale">When the method completes, contains the line and plane intersection.</param>
/// <returns>True if the given line intersects the current instance of <see cref="PlaneF"/>; False otherwise.</returns>
public bool Intersects(Line3F line, out float scale)
{
return(Intersects(ref line, out scale));
}
public Line3F( Line3F source )
{
Start = source.Start;
End = source.End;
}