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Two types of software can be used to draw
: vector drawing programs such as Sketch and bitmap softwares like The
Gimp or Adobe Photoshop (r).
Although twice are able to help you draw
graphics, the way they work, the way you understand them and finally their
use are totally different.
Bitmap drawing :
Bitmap drawing means you work with pixels.
Pixel is a point which can have color and transparency values. Images used
on the internet or digital pictures consist of a cloud of pixels. Let's
magnify a bitmap image :
Vectors based drawing :
Contrary to bitmap (with pixels), a vector
drawing consists in objects that are mathematics curves (Bezier curves)
or lines and segments which have a color and a size. Their primary advantage
comes from the fact that there is no visible pixel even if you magnify
a lot.
When a zoom is done, curves that compose
the drawing are automatically re-calculate so as to be scaled. That allows
you to work on an element or a group of elements without changing the quality.
High resolution works often requires this kind of image. In that case,
the "weight" of the image is independent of the size.
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