/// <summary>
/// Test a ray (in model space) for intersection with individual bones.
/// </summary>
/// <param name="ray"></param>
/// <returns></returns>
public IEnumerable<KeyValuePair<string, float>> Intersections(Ray3 ray)
{
return _model
.Model
.SkinningData
.Bounds
.Select((b, i) =>
{
Matrix4x4 transform;
Matrix4x4.Invert(_worldTransforms[i], out transform);
var start = Vector3.Transform(ray.Position, transform); //Transform ray into bone space
var direction = Vector3.TransformNormal(ray.Direction, transform);
float? depth = b.Intersects(new Ray3(start, direction)); //Intersect new ray in bone space
var name = _model.Model.SkinningData.Names[i];
return new KeyValuePair<string, float?>(name, depth);
})
.Where(a => a.Value.HasValue) //Only pass values which intersect
// ReSharper disable PossibleInvalidOperationException
.Select(a => new KeyValuePair<string, float>(a.Key, a.Value.Value)) //Select float (now we know it's not null)
// ReSharper restore PossibleInvalidOperationException
.OrderBy(a => a.Value) //Order by distance along ray
.ToArray();
}
public void AssertThat_RayAlmostStartingOnPlane_Intersects_WithPositivePlaneDistance()
{
Plane p = new Plane(new Vector3(0, 1, 0), 5);
Ray3 r = new Ray3(new Vector3(0, -4.999999f, 0), new Vector3(0, 1, 0));
var i = r.Intersects(p);
Assert.AreEqual(0, i);
}
public void AssertThat_DownwardRayIntersectsPlane_ReturnsCorrectValue_WithPositivePlaneDistance()
{
Plane p = new Plane(new Vector3(0, 1, 0), 5);
Ray3 r = new Ray3(new Vector3(0, 10, 0), new Vector3(0, -1, 0));
var i = r.Intersects(p);
Assert.AreEqual(15, i);
}
public void AssertThat_ParallelRayDoesNotIntersect_WithPositivePlaneDistance()
{
Plane p = new Plane(new Vector3(0, 1, 0), 5);
Ray3 r = new Ray3(new Vector3(0, 10, 0), new Vector3(1, 0, 0));
var i = r.Intersects(p);
Assert.IsNull(i);
}
/// <summary>
/// Checks whether the current BoundingBox intersects a Ray.
/// </summary>
/// <param name="ray">The Ray to check for intersection with.</param><param name="result">[OutAttribute] Distance at which the ray intersects the BoundingBox, or null if there is no intersection.</param>
public void Intersects(ref Ray3 ray, out float? result)
{
result = ray.Intersects(this);
}
public float? Intersects(Ray3 ray)
{
float? result;
Intersects(ref ray, out result);
return result;
}
/// <summary>
/// Checks whether the current BoundingSphere intersects a Ray.
/// </summary>
/// <param name="ray">The Ray to check for intersection with.</param><param name="result">[OutAttribute] Distance at which the ray intersects the BoundingSphere or null if there is no intersection.</param>
public void Intersects(ref Ray3 ray, out float?result)
{
ray.Intersects(ref this, out result);
}
/// <summary>
/// Checks whether the current BoundingSphere intersects with a specified Ray.
/// </summary>
/// <param name="ray">The Ray to check for intersection with the current BoundingSphere.</param>
public float?Intersects(Ray3 ray)
{
return(ray.Intersects(this));
}
/// <summary>
/// Determines whether the specified Ray is equal to the current Ray.
/// </summary>
/// <param name="other">The Ray to compare with the current Ray.</param>
public bool Equals(Ray3 other)
{
return(Position.Equals(other.Position) && Direction.Equals(other.Direction));
}
/// <summary>
/// Checks whether the current BoundingBox intersects a Ray.
/// </summary>
/// <param name="ray">The Ray to check for intersection with.</param><param name="result">[OutAttribute] Distance at which the ray intersects the BoundingBox, or null if there is no intersection.</param>
public void Intersects(ref Ray3 ray, out float?result)
{
result = ray.Intersects(this);
}
public float?Intersects(Ray3 ray)
{
Intersects(ref ray, out var result);
return(result);
}
public void AssertThat_RayClosestPoint_IsOnLine()
{
var ray = new Ray3(new Vector3(0, 1, 0), new Vector3(0, 10, 0));
var point = new Vector3(5, 5, 5);
var closest = ray.ClosestPoint(point);
Assert.AreEqual(new Vector3(0, 5, 0), closest);
}
/// <summary>
/// Determines whether the specified Ray is equal to the current Ray.
/// </summary>
/// <param name="other">The Ray to compare with the current Ray.</param>
public bool Equals(Ray3 other)
{
return Position.Equals(other.Position) && Direction.Equals(other.Direction);
}
public void AssertThat_UpwardRayIntersectsPlane_ReturnsCorrectValue()
{
Plane p = new Plane(new Vector3(0, 1, 0), 0);
Ray3 r = new Ray3(new Vector3(0, -10, 0), new Vector3(0, 1, 0));
var i = r.Intersects(p);
Assert.AreEqual(10, i);
}
public void AssertThat_RayStartingOnPlane_Intersects_WithNegativePlaneDistance()
{
Plane p = new Plane(new Vector3(0, 1, 0), -5);
Ray3 r = new Ray3(new Vector3(0, 5, 0), new Vector3(0, -1, 0));
var i = r.Intersects(p);
Assert.AreEqual(0, i);
}
public void AssertThat_RayPointingAwayDoesNotIntersect_WithNegativePlaneDistance()
{
Plane p = new Plane(new Vector3(0, 1, 0), -5);
Ray3 r = new Ray3(new Vector3(0, -10, 0), new Vector3(0, -1, 0));
var i = r.Intersects(p);
Assert.IsNull(i);
}
/// <summary>
/// Checks whether the current BoundingSphere intersects a Ray.
/// </summary>
/// <param name="ray">The Ray to check for intersection with.</param><param name="result">[OutAttribute] Distance at which the ray intersects the BoundingSphere or null if there is no intersection.</param>
public void Intersects(ref Ray3 ray, out float? result)
{
ray.Intersects(ref this, out result);
}
/// <summary>
/// Checks whether the current BoundingSphere intersects with a specified Ray.
/// </summary>
/// <param name="ray">The Ray to check for intersection with the current BoundingSphere.</param>
public float? Intersects(Ray3 ray)
{
return ray.Intersects(this);
}
