The TopPlane field represents the top plane of the frustum, oriented inwards. It is a part of the Frustum structure, which is used to define a 3D space that is typically used in rendering and visibility calculations. The TopPlane is one of the six planes that make up the frustum, each defining a boundary of the viewable area.
To access the TopPlane of a Frustum instance, simply reference it directly from the instance. This field is public and non-static, meaning it is accessed through an instance of the Frustum struct.
// Example of accessing the TopPlane of a Frustum Frustum frustum = new Frustum(); Plane topPlane = frustum.TopPlane; // Use the topPlane for calculations or rendering logic Vector3 normal = topPlane.Normal; float distance = topPlane.Distance;