Projection methods are developed along two lines: perspective and parallel. Projection theory comprises the principles used to represent graphically 3-D objects and structures on 2-D media Drawing more than one face of an object by moving your line of sight relative to the object helps in understanding the 3-D form. A line of sight is an imaginary ray of light between an observer's eye and the object. | Projection Theory Perspective and Parallel Projections Projection Theory A projection is a mapping of a 3D space onto a 2D subspace 2D space is called the projection plane Projection also refers to image resulting from such a mapping Classification of Projections Common Elements of a Projection System Center of Projection (Perspective)/Direction of Projection (Parallel) Projection Plane Object(s) to be projected Projectors Some Terminology Bounding Box = Principal Enclosing Box (PEB) Center of Projection = Station Point = Viewpoint of observer Projection Plane = Viewplane = Picture Plane Projectors = Sightlines = Line of Sight Projection Theory Perspective and Parallel . | Projection Theory Perspective and Parallel Projections Projection Theory A projection is a mapping of a 3D space onto a 2D subspace 2D space is called the projection plane Projection also refers to image resulting from such a mapping Classification of Projections Common Elements of a Projection System Center of Projection (Perspective)/Direction of Projection (Parallel) Projection Plane Object(s) to be projected Projectors Some Terminology Bounding Box = Principal Enclosing Box (PEB) Center of Projection = Station Point = Viewpoint of observer Projection Plane = Viewplane = Picture Plane Projectors = Sightlines = Line of Sight Projection Theory Perspective and Parallel Projections | Projection Theory Perspective and Parallel Projections Projection Theory A projection is a mapping of a 3D space onto a 2D subspace 2D space is called the projection plane Projection also refers to image resulting from such a mapping Classification of Projections Common Elements of a Projection System Center of Projection (Perspective)/Direction of Projection (Parallel) Projection Plane Object(s) to be projected Projectors Some Terminology Bounding Box = Principal Enclosing Box (PEB) Center of Projection = Station Point = Viewpoint of observer Projection Plane = Viewplane = Picture Plane Projectors = Sightlines = Line of Sight Projection Theory Perspective and Parallel Projections | Projection Theory Perspective and Parallel Projections Projection Theory A projection is a mapping of a 3D space onto a 2D subspace 2D space is called the projection plane Projection also refers to image resulting from such a mapping Classification of Projections Common Elements of a Projection System Center of Projection (Perspective)/Direction of Projection (Parallel) Projection Plane Object(s) to be projected Projectors Some Terminology Bounding Box = Principal Enclosing Box (PEB) Center of Projection = Station Point = Viewpoint of observer Projection Plane = Viewplane = Picture Plane Projectors = Sightlines = Line of Sight Projection Theory Perspective and Parallel . | Projection Theory Perspective and Parallel Projections Projection Theory A projection is a mapping of a 3D space onto a 2D subspace 2D space is called the projection plane Projection also refers to image resulting from such a mapping Classification of Projections Common Elements of a Projection System Center of Projection (Perspective)/Direction of Projection (Parallel) Projection Plane Object(s) to be projected Projectors Some Terminology Bounding Box = Principal Enclosing Box (PEB) Center of Projection = Station Point = Viewpoint of observer Projection Plane = Viewplane = Picture Plane Projectors = Sightlines = Line of Sight Projection Theory Perspective and Parallel Projections
