Tài liệu tham khảo bằng tiếng Anh về hội họa - Perspective Drawing Handbook - Phần 2 | Chapter 5 PRINCIPAL AIDS-VANISHING POINTS AND EYE LEVEL HORIZON LINE In views of real life and therefore in realistic pictures the eye level horizon line is rarely visible and vanishing points virtually never are. Yet the full significance of these concepts must be clearly understood. Working with an awareness of them and actually sketching them in temporarily are perspective drawing prerequisites. AID No. 1 VANISHING POINTS Any two or more lines that are in reality parallel will if extended indefinitely appear to come together or meet at a point. This point is called the VANISHING POINT of these lines. The classic and still best example of this phenomenon is the tracks of a railroad. The rails in reality parallel appear to converge and ultimately meet at a point in the distant horizon. Many historical paintings of church interiors look something like this. If all the column capitals on each side and then all the column bases were connected and these lines brought back into the picture they would meet at the same point as other similarly-oriented parallel lines such as the center aisle or the procession. The only exception to this occurs when the parallel lines are also parallel to the observer s face and to the picture plane. In this case they neither recede nor converge and therefore do not have a vanishing point. For example the edges of this brick wall and all its vertical and horizontal joints are exactly parallel to the observer s face and to the picture plane. Therefore the verticals still appear vertical and the horizontals still appear horizontal and parallel to one another. The general truth of seeing and drawing except for the special case above is ALL LINES WHICH IN REALITY ARE PARALLEL WILL CONVERGE TOWARD A SINGLE VANISHING POINT. y 24 Vanishing Points Cont. When There Are Many Sets Of Parallel Lines Going In Different Directions Take a photograph of a house or of any other object with several sets of parallel lines and with straight-edge and pencil .
