Intersects() [2/9]

bool Microsoft.Xna.Framework.BoundingFrustum.Intersects ( BoundingFrustum frustum )

inline

Definition at line 236 of file BoundingFrustum.cs.

    {
        if (frustum == null)
        {
            throw new ArgumentNullException("frustum");
        }
        if (gjk == null)
        {
            gjk = new Gjk();
        }
        gjk.Reset();
        Vector3.Subtract(ref cornerArray[0], ref frustum.cornerArray[0], out var result);
        if (result.LengthSquared() < 1E-05f)
        {
            Vector3.Subtract(ref cornerArray[0], ref frustum.cornerArray[1], out result);
        }
        float num = float.MaxValue;
        float num2 = 0f;
        Vector3 v = default(Vector3);
        do
        {
            v.X = 0f - result.X;
            v.Y = 0f - result.Y;
            v.Z = 0f - result.Z;
            SupportMapping(ref v, out var result2);
            frustum.SupportMapping(ref result, out var result3);
            Vector3.Subtract(ref result2, ref result3, out var result4);
            float num3 = result.X * result4.X + result.Y * result4.Y + result.Z * result4.Z;
            if (num3 > 0f)
            {
                return false;
            }
            gjk.AddSupportPoint(ref result4);
            result = gjk.ClosestPoint;
            float num4 = num;
            num = result.LengthSquared();
            num2 = 4E-05f * gjk.MaxLengthSquared;
            if (num4 - num <= 1E-05f * num4)
            {
                return false;
            }
        }
        while (!gjk.FullSimplex && num >= num2);
        return true;
    }

References Microsoft.Xna.Framework.Gjk.AddSupportPoint(), Microsoft.Xna.Framework.Gjk.ClosestPoint, Microsoft.Xna.Framework.BoundingFrustum.cornerArray, System.E, Microsoft.Xna.Framework.Gjk.FullSimplex, Microsoft.Xna.Framework.BoundingFrustum.gjk, Microsoft.Xna.Framework.Gjk.MaxLengthSquared, Microsoft.Xna.Framework.Gjk.Reset(), Microsoft.Xna.Framework.Vector3.Subtract(), Microsoft.Xna.Framework.BoundingFrustum.SupportMapping(), and Microsoft.Xna.Framework.Vector3.X.