/// <summary>
/// Gets the first intersection of a ray with a box (closest intersection to the
/// ray origin)</summary>
/// <param name="ray">Ray</param>
/// <param name="box">Box</param>
/// <param name="intersection">Intersection point</param>
/// <returns>True iff ray hits box</returns>
public static bool Intersect(Ray2F ray, Box2F box, ref Vec2F intersection)
{
// do X slab
float tmin, tmax;
SlabIntersect(
ray.Direction.X, ray.Origin.X, box.Min.X, box.Max.X, out tmin, out tmax);
// do Y slab
float tminTemp, tmaxTemp;
SlabIntersect(
ray.Direction.Y, ray.Origin.Y, box.Min.Y, box.Max.Y, out tminTemp, out tmaxTemp);
if ((tmin > tmaxTemp) || (tminTemp > tmax))
{
return(false);
}
tmin = Math.Max(tmin, tminTemp);
tmax = Math.Min(tmax, tmaxTemp);
// intersection at tmin, the maximal-minimal value
if (tmin > 0)
{
intersection = ray.Origin + ray.Direction * tmin;
return(true);
}
return(false);
}
/// <summary>
/// Gets the first intersection of a ray with a box (closest intersection to the
/// ray origin)</summary>
/// <param name="ray">Ray</param>
/// <param name="box">Box</param>
/// <param name="intersection">Intersection point</param>
/// <returns>True iff ray hits box</returns>
public static bool Intersect(Ray2F ray, Box2F box, ref Vec2F intersection)
{
// do X slab
float tmin, tmax;
SlabIntersect(
ray.Direction.X, ray.Origin.X, box.Min.X, box.Max.X, out tmin, out tmax);
// do Y slab
float tminTemp, tmaxTemp;
SlabIntersect(
ray.Direction.Y, ray.Origin.Y, box.Min.Y, box.Max.Y, out tminTemp, out tmaxTemp);
if ((tmin > tmaxTemp) || (tminTemp > tmax))
return false;
tmin = Math.Max(tmin, tminTemp);
tmax = Math.Min(tmax, tmaxTemp);
// intersection at tmin, the maximal-minimal value
if (tmin > 0)
{
intersection = ray.Origin + ray.Direction * tmin;
return true;
}
return false;
}
private void TestToStringWithCulture(CultureInfo culture)
{
CultureInfo originalCulture = Thread.CurrentThread.CurrentCulture;
Thread.CurrentThread.CurrentCulture = culture;
try
{
string listSeparator = culture.TextInfo.ListSeparator;
string decimalSeparator = culture.NumberFormat.NumberDecimalSeparator;
var corner1 = new Vec2F(1.1f, 2.2f);
var corner2 = new Vec2F(4.4f, 5.5f);
var o = new Box2F(corner1, corner2);
string s = o.ToString(null, null);
TestToStringResults(o, s, listSeparator, decimalSeparator);
string s2 = o.ToString();
Assert.AreEqual(s, s2);
s = o.ToString("G", culture);
TestToStringResults(o, s, listSeparator, decimalSeparator);
s = o.ToString("R", culture);
TestToStringResults(o, s, listSeparator, decimalSeparator);
}
finally
{
Thread.CurrentThread.CurrentCulture = originalCulture;
}
}
/// <summary>
/// Extends the box to contain the given box</summary>
/// <param name="other">Given box</param>
/// <returns>Extended box</returns>
public Box2F Extend(Box2F other)
{
if (!other.IsEmpty)
{
Extend(other.Min);
Extend(other.Max);
}
return(this);
}
private void TestToStringResults(Box2F o, string s, string listSeparator, string decimalSeparator)
{
string[] results = s.Split(new[] { listSeparator }, StringSplitOptions.RemoveEmptyEntries);
Assert.AreEqual(results.Length, 4);
foreach (string oneFloatString in results)
Assert.True(oneFloatString.Contains(decimalSeparator));
Assert.AreEqual(float.Parse(results[0]), o.Min.X);
Assert.AreEqual(float.Parse(results[1]), o.Min.Y);
Assert.AreEqual(float.Parse(results[2]), o.Max.X);
Assert.AreEqual(float.Parse(results[3]), o.Max.Y);
}
/// <summary>
/// Extends the box to contain the given box</summary>
/// <param name="other">Given box</param>
/// <returns>Extended box</returns>
public Box2F Extend(Box2F other)
{
if (!other.IsEmpty)
{
Extend(other.Min);
Extend(other.Max);
}
return this;
}
