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1. Introduction > Definition
1.1. INTRODUCTION | Computer Graphics | What is LOGO? |
1.1.1. Computer Graphics
We can instruct a computer to draw a graph or a picture or patterns or graphs. The pictures drawn by a computer are called as Computer Graphics.
How does a computer draw a picture? The computer screen consists of a number of dots called Pixels. Several pixels can be joined to form a line. Each pixel is identified by the screen co-ordinates (x, y) where x is in the horizontal axis (row) and y is the vertical axis (column) as shown in Fig. 1.1.1.
1.1.2. What is LOGO?
LOGO is a programming language used for drawing pictures. You need to know and learn the LOGO Commands to draw simple pictures. LOGO stands for Logic-Oriented Graphic-Oriented.
LOGO has a pen called a
TURTLE
which can be instructed to draw pictures. Turtle in LOGO is called as a
turtle because the first version of LOGO used an electronic robot which
resembled a turtle. The turtle and a sample of pictures drawn using LOGO
instructions can be shown in Fig. 1.1.2.
Fig. 1.1.2. LOGO turtle and a sample picture
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