Frustum

Constructs a new unit frustum with each of its planes 1 meter from the center and a viewport with width and height both 1.

Constructs a frustum from planes.

See if the point is entirely within the frustum. The dot product of the point with each plane's vector provides a distance to each plane. If this distance is less than 0, the point is clipped by that plane and neither intersects nor is contained by the space enclosed by this Frustum.

Determines whether a line segment intersects this frustum.

Determines whether a screen coordinate viewport intersects this frustum.

Sets this frustum to one appropriate for a modelview-projection matrix. A modelview-projection matrix's view frustum is a Cartesian volume that contains everything visible in a scene displayed using that modelview-projection matrix.
This method assumes that the specified matrices represents a projection matrix and a modelview matrix respectively. If this is not the case the results are undefined.

Sets this frustum to one appropriate for a subset of a modelview-projection matrix. A modelview-projection matrix's view frustum is a Cartesian volume that contains everything visible in a scene displayed using that modelview-projection matrix. The subset is defined by the region within the original viewport that the frustum contains.
This method assumes that the specified matrices represents a projection matrix and a modelview matrix respectively. If this is not the case the results are undefined.

Sets this frustum to a unit frustum with each of its planes 1 meter from the center a viewport with width and height both 1.