Clipping plane

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When clipping plane or clipping plane is referred to in the 3D computer graphics , a level that the visible partial volume of the scene is limited (view volume) transverse to the viewing direction.

A visual volume ( frustum , here light gray) that is limited by the clipping planes

A distinction is made between different clipping levels:

  • The front clipping plane (near clipping plane) is the plane that limits the field of vision in the close-up range. This level faces away from the viewer with its front side. All objects that are in front of the front clipping plane are too close to or behind the viewer.
  • The rear clipping plane (far clipping plane) is the plane that delimits the field of vision in the distance. This plane faces the viewer with its front side. All objects behind the rear clipping plane are too far away to be seen.

In graphics systems, the front and rear clipping planes are also referred to as hither and yon , respectively. The reason for these designations is that in some compilers for the programming languages C and C ++ near and far are reserved as keywords .

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