Oblique projections are popular among interior designers.Although there are several types of oblique drawings.The plan oblique and elevation oblique are the most commonly used.In these drawingars the floor plan or elevation serves as the true face on the picture plane.and parallel lines are projected vertically or horizontally at an angle other than 90 degrees from this face.The viewers lines of sight are parallel. But are not at right angles with the viewing plane.and represented in true proportion,such as an elevation or plan view.The parallel lines are sometimes reduced in scale in (short-ing to the number of vanishing points used to construct them to construct perspectives.an imaginary picture plane is placed between the observer and the object (or interior) to be drawn.If this plane can be placed parallel to only one set of lines (the vertical lines.for example) the results are termed a two-vanishing points.A three-point perspective is produced when all the lines or faces of an object are oblique (not parallel) to the picture plane.This method is not often used for interior spaces.But rather for tall buildings.Each of these perspective types can be hand-drawn in a number of diffrent ways.
A projection system can be made and overaly sheets placed over it to draw a perspective.One method for consulting a grid is shown in it.Perspective grids can be drawn for each project.Or preprintede grids can be made with the lines already drawn in true perspective.These grids can be generated by hand or computer,or one can purchase preprinted grids.
One-Point Perspectives
Of the three types of perspective the one-point is perhaps the eastest to understand and construct.In one-point perspectives.receding lines or sides of an object appear to vanish to a single point an the horizon.These types of perspectives are often used to produce room interiors,either from an elevation (front view) or plan (top view),depending on where the observer is standing (called the station point),as illustrated in it.The set up for both of these is exactly the same,the difference being wheather the observer is positioned above or at the horizon.The station point can also be removed to the left or right to emphasize the particulars of the space.
Two-Point Perspectives
The two-point perspective is one of the most widely used of the three types,as it portrays the most realistic view for the observer.By placing the object at unequal angles from the right and left vanishing points (which corresponds to the viewer's position in the spaces).dynamic views can be produced.However,if the viewer's position is moved too far over to one side or the other,distortions can occur in the final drawing.In most interior views.The eye-level perspective is the preferred choice.Two-point perspectives are more difficult to hand-draw than one-point perspectives, as planes must be projected to two vanishing points,as illustrated in it.
Three-Point Perspectives
Three-point perspectives are generally drawn with the viewer at a distance above the horizon (worm's-eye view).The three-point perspective is used mostly for very tall buildings and is rarely used in interior spaces,unless they are multistoried.Three-point perspectives are more complicated than the former two types,as a third vanishing point is introduced.Which precludes all parallel lines.
One-Point Perspectives
Two-Point Perspectives
Three-Point Perspectives
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