/// <summary>
/// Test if and where the RotRect intersects with a line.
/// </summary>
/// <param name="line">The line to test.</param>
/// <returns>The intersection point closest to the line's A point if it was hit, or null if it didn't hit.</returns>
public Vector2?IntersectsAt(Line line)
{
Vector2[] points = GetRotatedPosArray();
Vector2[] otherPoints = line.GetPosArray();
Vector2 a = line.A;
float closest = float.PositiveInfinity;
float dist;
Vector2?ret = null;
Vector2?test = null;
test = SpecialMath.LineSegmentsIntersectAt(otherPoints[0], otherPoints[1], points[0], points[1]);
if (test.HasValue)
{
dist = Vector2.Distance(a, test.Value);
if (dist < closest)
{
closest = dist;
ret = test;
}
}
test = SpecialMath.LineSegmentsIntersectAt(otherPoints[0], otherPoints[1], points[1], points[2]);
if (test.HasValue)
{
dist = Vector2.Distance(a, test.Value);
if (dist < closest)
{
closest = dist;
ret = test;
}
}
test = SpecialMath.LineSegmentsIntersectAt(otherPoints[0], otherPoints[1], points[2], points[3]);
if (test.HasValue)
{
dist = Vector2.Distance(a, test.Value);
if (dist < closest)
{
closest = dist;
ret = test;
}
}
test = SpecialMath.LineSegmentsIntersectAt(otherPoints[0], otherPoints[1], points[3], points[0]);
if (test.HasValue)
{
dist = Vector2.Distance(a, test.Value);
if (dist < closest)
{
closest = dist;
ret = test;
}
}
return(ret);
}
/// <summary>
/// Test if the RotRect intersects with another RotRect.
/// </summary>
/// <param name="other">The other RotRect to test.</param>
/// <returns>True if they intersect, false if they don't.</returns>
public bool Intersects(RotRect other)
{
Vector2[] points = GetRotatedPosArray();
Vector2[] otherPoints = other.GetRotatedPosArray();
if (PointInPolygon(points[0], otherPoints) ||
PointInPolygon(points[1], otherPoints) ||
PointInPolygon(points[2], otherPoints) ||
PointInPolygon(points[3], otherPoints) ||
PointInPolygon(otherPoints[0], points) ||
PointInPolygon(otherPoints[1], points) ||
PointInPolygon(otherPoints[2], points) ||
PointInPolygon(otherPoints[3], points)
)
{
return(true);
}
if (SpecialMath.LineSegmentsIntersect(points[0], points[1], otherPoints[0], otherPoints[1]) ||
SpecialMath.LineSegmentsIntersect(points[1], points[2], otherPoints[0], otherPoints[1]) ||
SpecialMath.LineSegmentsIntersect(points[2], points[3], otherPoints[0], otherPoints[1]) ||
SpecialMath.LineSegmentsIntersect(points[3], points[0], otherPoints[0], otherPoints[1]) ||
SpecialMath.LineSegmentsIntersect(points[0], points[1], otherPoints[1], otherPoints[2]) ||
SpecialMath.LineSegmentsIntersect(points[1], points[2], otherPoints[1], otherPoints[2]) ||
SpecialMath.LineSegmentsIntersect(points[2], points[3], otherPoints[1], otherPoints[2]) ||
SpecialMath.LineSegmentsIntersect(points[3], points[0], otherPoints[1], otherPoints[2]) ||
SpecialMath.LineSegmentsIntersect(points[0], points[1], otherPoints[2], otherPoints[3]) ||
SpecialMath.LineSegmentsIntersect(points[1], points[2], otherPoints[2], otherPoints[3]) ||
SpecialMath.LineSegmentsIntersect(points[2], points[3], otherPoints[2], otherPoints[3]) ||
SpecialMath.LineSegmentsIntersect(points[3], points[0], otherPoints[2], otherPoints[3]) ||
SpecialMath.LineSegmentsIntersect(points[0], points[1], otherPoints[3], otherPoints[0]) ||
SpecialMath.LineSegmentsIntersect(points[1], points[2], otherPoints[3], otherPoints[0]) ||
SpecialMath.LineSegmentsIntersect(points[2], points[3], otherPoints[3], otherPoints[0]) ||
SpecialMath.LineSegmentsIntersect(points[3], points[0], otherPoints[3], otherPoints[0])
)
{
return(true);
}
return(false);
}
public bool Intersects(Line line)
{
return(SpecialMath.LineSegmentsIntersect(A, B, line.A, line.B));
}
public Vector2 IntersectionPoint(Line line)
{
return(SpecialMath.IntersectionPoint(A, B, line.A, line.B));
}