Engineering Science 1050 Lecture Notes - Lecture 13: Graphical Projection, Vanishing Point, Picture Plane
24 Jul 2018
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Dimension & extension lines: show a size on object. Cutting plane lines: imaginary cut has been made through an object to view interior features. Section lines: areas that have been cut by a cutting plane. Type of drawing of graphical projection used for making 2d images of 3d objects. All receding lines are parallel @ 45 degree angle to the horizontal. All lines (including receding lines) made to their true length. Type of parallel projection drawing of an object. Receding lines are at 30 degrees to the horizontal. Receding lines are at 15 degrees to the horizontal. One receding lines @ 15 degrees while the other is @ 45 degrees to the horizontal. Views are defined according to the planes of projection with respect to the. Drawings show multiple views of an object (usually 3) Views are defined according to the planes of projection with respect to the object.
