Tham khảo tài liệu 'hướng dẫn sử dụng coreldraw x5 - part 56', công nghệ thông tin, đồ họa - thiết kế - flash phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 534 CorelDRAW X5 The Official Guide The property of visual perspective was first documented by Leonardo da Vinci and used in his technical drawings to give an accurate sense of depth to his 2D two-dimensional pieces. Perspective in drawings can be calculated today by CorelDRAW and other applications and this chapter takes you through a definition of perspective how to use CorelDRAW s perspective effect and how to feature the artistic quality of perspective in your work to produce lifelike illustrations. If you want your audience to be drawn into your work and not simply to stare at it consider adding some perspective. .so your audience will see it too NOTE Download and extract all the files from the archive to follow the tutorials in this chapter. The Optical Principle of Perspective We ve all witnessed the effect of perspective for example you make sure a train isn t coming and then you stand on the tracks and look into the horizon. Apparently the train tracks converge as they vanish at the horizon. Naturally the tracks don t actually converge or it would be difficult to put a train on them. This is an optical illusion that demonstrates the very real optics of the human eye. Any object that has parallel sides a milk carton most tables when viewed at an angle other than face-forward will look as though its parallel sides converge at a point somewhere in the distance. This point whether you can see it on train tracks or imagine it by mentally extending the parallel lines is called the vanishing point and CorelDRAW s perspective effect offers an onscreen marker for moving a shape s vanishing point when Effects Add Perspective has been applied to an object or group of objects. Depending on the angle at which you view an object let s use a cube as an example you can see one two or three sides of the cube. When you draw a cube face-front in CorelDRAW you ve drawn a square there is no perspective and it s not a visually interesting representation. If you .
