Giga Geometry Implementation

include/J3ML/Geometry/Frustum.h

@@ -139,7 +139,23 @@ namespace J3ML::Geometry
         Matrix4x4 projectionMatrix;
         Matrix4x4 viewProjectionMatrix;
     public: /// Methods
-        Frustum();
+        Frustum()
+        : type(FrustumType::Invalid),
+        pos(Vector3::NaN),
+        front(Vector3::NaN),
+        up(Vector3::NaN),
+        nearPlaneDistance(NAN),
+        farPlaneDistance(NAN),
+        worldMatrix(Matrix4x4::NaN),
+        viewProjectionMatrix(Matrix4x4::NaN)
+        {
+            // For conveniency, allow automatic initialization of the graphics API and handedness in use.
+            // If neither of the #defines are set, user must specify per-instance.
+        }
+
+
+        /// Quickly returns an arbitrary point inside this Frustum. Used in GJK intersection test.
+        inline Vector3 AnyPointFast() const { return CornerPoint(0); }
 
         static Frustum CreateFrustumFromCamera(const CoordinateFrame& cam, float aspect, float fovY, float zNear, float zFar);
         AABB MinimalEnclosingAABB() const;
@@ -175,7 +191,13 @@ namespace J3ML::Geometry
         Vector3 NearPlanePos(float x, float y) const;
         Vector3 FarPlanePos(float x, float y) const;
 
-        Vector3 WorldRight() const;
+        Vector3 WorldRight() const
+        {
+            if (handedness == FrustumHandedness::Right)
+                return Vector3::Cross(front, up);
+            else
+                return Vector3::Cross(up, front);
+        }
 
         Plane TopPlane() const;
         Plane BottomPlane() const;
@@ -211,5 +233,11 @@ namespace J3ML::Geometry
         void ProjectToAxis(const Vector3 &direction, float &outMin, float &outMax) const;
 
         void GetCornerPoints(Vector3 *outPointArray) const;
+
+        Vector3 ExtremePoint(const Vector3 &direction, float &projectionDistance) const;
+
+        LineSegment Edge(int edgeIndex) const;
+
+        bool Intersects(const Line &line) const;
     };
 }