multimedia ch5

Linear algebra

• Itis a branch of mathematics that is fundamental to computer graphics (

Primitive

The basic objects out of which a graphics display is created are called

Point

shown by illuminating a pixel on the screen

vector

is defined as the difference between two points

important hing is that a voctor has a

direction and a length

Transformation

means changing some graphics into something else by applying rules

translation

moves an object to a

different position on the screen.

Scaling

multiplies all coordinates

Rotates

all coordinates by a specified

angle

Matrices

matrixis simply a grid of numbers)

The transpose of a matrix

M, written as MT is obtained by simply interchanging

the rows and columns of the matrix

Matrix addition

Both matrises have to be the sire size