/// <summary>
/// Generates a bounding box for a collection of vectors.
/// </summary>
/// <param name="vecs">The vectors to create a bounding box from.</param>
/// <returns>A bounding box containing every vector.</returns>
public static BBox3 GetBoundingBox(this IEnumerable <Vector3> vecs)
{
BBox3 bounds = new BBox3();
Vector3 v;
foreach (Vector3 vec in vecs)
{
v = vec;
ApplyVertexToBounds(ref v, ref bounds);
}
ApplyPaddingToBounds(1.0f, ref bounds);
return(bounds);
}
/// <summary>
/// Generates a bounding box for a collection of triangles.
/// </summary>
/// <param name="tris">The triangles to create a bounding box from.</param>
/// <param name="padding">Padding to the bounding box</param>
/// <returns>A bounding box containing every triangle.</returns>
public static BBox3 GetBoundingBox(this IEnumerable <Triangle3> tris, float padding)
{
BBox3 bounds = new BBox3();
Vector3 va, vb, vc;
foreach (Triangle3 tri in tris)
{
va = tri.A;
vb = tri.B;
vc = tri.C;
ApplyVertexToBounds(ref va, ref bounds);
ApplyVertexToBounds(ref vb, ref bounds);
ApplyVertexToBounds(ref vc, ref bounds);
}
//pad the bounding box a bit to make sure outer triangles are fully contained.
ApplyPaddingToBounds(padding, ref bounds);
return(bounds);
}
/// <summary>
/// Calculates the bounding box of a triangle from its vertices.
/// </summary>
/// <param name="a">The first vertex.</param>
/// <param name="b">The second vertex.</param>
/// <param name="c">The third vertex.</param>
/// <param name="bbox">The bounding box between the points.</param>
public static void GetBoundingBox(ref Vector3 a, ref Vector3 b, ref Vector3 c, out BBox3 bbox)
{
Vector3 min = a, max = a;
if (b.X < min.X)
{
min.X = b.X;
}
if (b.Y < min.Y)
{
min.Y = b.Y;
}
if (b.Z < min.Z)
{
min.Z = b.Z;
}
if (c.X < min.X)
{
min.X = c.X;
}
if (c.Y < min.Y)
{
min.Y = c.Y;
}
if (c.Z < min.Z)
{
min.Z = c.Z;
}
if (b.X > max.X)
{
max.X = b.X;
}
if (b.Y > max.Y)
{
max.Y = b.Y;
}
if (b.Z > max.Z)
{
max.Z = b.Z;
}
if (c.X > max.X)
{
max.X = c.X;
}
if (c.Y > max.Y)
{
max.Y = c.Y;
}
if (c.Z > max.Z)
{
max.Z = c.Z;
}
bbox.Min = min;
bbox.Max = max;
}
/// <summary>
/// Calculates the bounding box of a triangle.
/// </summary>
/// <param name="tri">A triangle.</param>
/// <param name="bbox">The triangle's bounding box.</param>
public static void GetBoundingBox(ref Triangle3 tri, out BBox3 bbox)
{
GetBoundingBox(ref tri.A, ref tri.B, ref tri.C, out bbox);
}
