# Intro to Vector Graphics

## Overview

Adobe Illustrator is a vector-based program. In this lesson we'll talk about the things that make vector graphics unique. We'll also address some of the things that make Illustrator an industry-leading piece of graphic software.

## What are Vector Graphics?

**Vector graphics** is the use of *geometrical primitives* such as **points**, **lines**, **curves**, and **shapes**or **polygons**, which are all based on *mathematical expressions*, to represent images in computer graphics.

In vector graphics, **Bézier curves**are used to model *smooth curves*that can be *scaled indefinitely*.

**Paths**, as they are commonly referred to in image manipulation programs are combinations of **linked Bézier curves**.

Paths are not bound by the limits of rasterized images and are intuitive to modify.

A **Bézier Curve** is a *representation* of a *curve* through equations expressing the coordinates of the points of the curve as functions of a variable called a parameter

Bézier curves are also used in animation as a tool to control motion.

**Bézier curves** were widely publicized in 1962 by the French engineer **Pierre Bézier**, who used them to design automobile bodies at Renault.

## Vector Terminology

### BÉZIER CURVES (PATHS)

### CONTROL POINT (HANDLES)

### ANCHOR POINTS (POINTS)

### LINE ART

## Line Art

One of the most fundamental elements of art is the **line**.

**Line art** or **line drawing** is any image that consists of distinct *straight* and *curved lines* placed against a background, *without*gradations in shade or hue to represent two-dimensional or three-dimensional objects.

An important feature of a line is that it indicates the *edge* of a *two-dimensional shape* or a *three-dimensional form*.

A *shape* can be indicated by means of an **outline** and a *three-dimensional form* can be indicated by **contour lines**.

Line art can use lines of different colors, although line art is usually *monochromatic*. Line art emphasizes **form** and **outline**, over *color*, *shading*, and *texture*.

Line art is the basis of most *printmaking techniques* such as **engraving**, **etching**, **woodcut**, **lithography** and **serigraphy**(screen printing).

## Semester Points

This class operates on a **subtraction method** in terms of grading.

As such, each student starts off with **100pts**, *full credit*, for all exercises, assignments and classroom performance.

The **Overall Semester Grade**consists of the following components:

**5 Projects**: 8pts each / 40pts total**10 Exercises**: 3pt each / 30pts total**Participation**: 1pt per class / 30pts total

Total **100pts**

## What is Illustrator good at?

Constructing *crisp*, *detailed* and *precise* **line art**

**Managing curves** in a variety of ways (transform palette, presets, etc.)

**Broad toolset** for creating vector lines (geometric, freehand, etc.)

Attaching a variety of **effects** to curves

**Generating** robust sets of vector curves with minimal effort