private static Vector2 GetIntersectionVector2IfOneIsVertical(LineEquation line1, LineEquation line2)
{
LineEquation verticalLine = line2.IsVertical ? line2 : line1;
LineEquation nonVerticalLine = line2.IsVertical ? line1 : line2;
float y = (verticalLine.Start.x - nonVerticalLine.Start.x) *
(nonVerticalLine.End.y - nonVerticalLine.Start.y) /
((nonVerticalLine.End.x - nonVerticalLine.Start.x)) +
nonVerticalLine.Start.y;
float x = line1.IsVertical ? line1.Start.x : line2.Start.x;
return(new Vector2(x, y));
}
public Vector2 IntersectWithSegementOfLine(LineEquation otherLine)
{
Vector2 intersectionVector2 = new Vector2();
bool hasIntersection = IntersectsWithLine(otherLine, out intersectionVector2);
if (hasIntersection)
{
return(intersectionVector2);
}
else
{
return(Vector2.zero);
}
}
public bool IntersectsWithLine(LineEquation otherLine, out Vector2 intersectionVector2)
{
intersectionVector2 = new Vector2(0, 0);
if (IsVertical && otherLine.IsVertical)
{
return(false);
}
if (IsVertical || otherLine.IsVertical)
{
intersectionVector2 = GetIntersectionVector2IfOneIsVertical(otherLine, this);
return(true);
}
float delta = A * otherLine.B - otherLine.A * B;
bool hasIntersection = Mathf.Abs(delta - 0) > 0.0001f;
if (hasIntersection)
{
float x = (otherLine.B * C - B * otherLine.C) / delta;
float y = (A * otherLine.C - otherLine.A * C) / delta;
intersectionVector2 = new Vector2(x, y);
}
return(hasIntersection);
}