public bool Intersects(GeneralLine2D line2, ref EOFC.Vector2D intersectionPt)
{
// If the two lines are parallel then they won't intersect
if (IsParallel(line2))
{
return(false);
}
float x, y;
// Handle special case
if (0.0f == A)
{
y = -C / B;
x = (-line2.B * y - line2.C) / line2.A;
intersectionPt = new EOFC.Vector2D(x, y);
return(true);
}
float val1 = (-line2.A * B) / A + line2.B;
y = ((line2.A * C / A) - line2.C) / val1;
x = (-B * y - C) / A;
intersectionPt = new EOFC.Vector2D(x, y);
return(true);
}
public bool IsParallel(GeneralLine2D line2)
{
// The two lines will be parallel if their normalized normal vectors are
// the same or one is the negative of the other.
float len1 = NormalLength;
float na1 = A / len1;
float nb1 = B / len1;
float len2 = line2.NormalLength;
float na2 = line2.A / len2;
float nb2 = line2.B / len2;
return((na1 == na2 && nb1 == nb2) || (na1 == -na2 && nb1 == -nb2));
}
public bool Intersects(GeneralLine2D line, ref EOFC.Vector2D outISectPt)
{
GeneralLine2D thisInfLine = new GeneralLine2D(m_p1, m_p2);
EOFC.Vector2D temp = new Vector2D();
if (!thisInfLine.Intersects(line, ref temp))
{
return(false);
}
// The two infinite lines intersect, now see if the intersection point
// is on this segment
if (this.IsPointOnSegment(temp))
{
outISectPt = temp;
return(true);
}
return(false);
}
public GeneralLine2D(GeneralLine2D copyme)
{
this.A = copyme.A;
this.B = copyme.B;
this.C = copyme.C;
}
public GeneralLine2D(GeneralLine2D copyme)
{
this.A = copyme.A;
this.B = copyme.B;
this.C = copyme.C;
}
public bool IsParallel(GeneralLine2D line2)
{
// The two lines will be parallel if their normalized normal vectors are
// the same or one is the negative of the other.
float len1 = NormalLength;
float na1 = A / len1;
float nb1 = B / len1;
float len2 = line2.NormalLength;
float na2 = line2.A / len2;
float nb2 = line2.B / len2;
return ((na1 == na2 && nb1 == nb2) || (na1 == -na2 && nb1 == -nb2));
}
public bool Intersects(GeneralLine2D line2, ref EOFC.Vector2D intersectionPt)
{
// If the two lines are parallel then they won't intersect
if (IsParallel(line2))
{
return false;
}
float x, y;
// Handle special case
if (0.0f == A)
{
y = -C / B;
x = (-line2.B * y - line2.C) / line2.A;
intersectionPt = new EOFC.Vector2D(x, y);
return true;
}
float val1 = (-line2.A * B) / A + line2.B;
y = ((line2.A * C / A) - line2.C) / val1;
x = (-B * y - C) / A;
intersectionPt = new EOFC.Vector2D(x, y);
return true;
}
public bool Intersects(GeneralLine2D line, ref EOFC.Vector2D outISectPt)
{
GeneralLine2D thisInfLine = new GeneralLine2D(m_p1, m_p2);
EOFC.Vector2D temp = new Vector2D();
if (!thisInfLine.Intersects(line, ref temp))
{
return false;
}
// The two infinite lines intersect, now see if the intersection point
// is on this segment
if (this.IsPointOnSegment(temp))
{
outISectPt = temp;
return true;
}
return false;
}
