3. Multimedia, Computing Higher, FAQ

FAQ – Object Oriented Image File Types in Multimedia

Description of basic features and structures of vector graphic file types, including methods used to implement common attributes listed above for these file types:

  • SVG
  • VRML/WRL

To view the VRML file you will need a browser extension like this one. The blogs security does not like SVG or VRML files so I will need to link to external ones. You can find flash cards here .

These file types are vector (object) based rather than bitmaps. To convert from a object to a bitmap image format is called rasterisation or 3D rendering.

Scalable Vector Graphics (SVG)

This is used to create vector based 2D images. The SVG file format uses text (ascii) to describe the attributes of the image. This results in small files that can be quickly transferred across a network. These files need to be rasterised before they are displayed on a monitor.

Here are some common shapes for SVG

You may have noticed these common attributes.

  • Size
    • WIDTH & HEIGHT in rectangles
    • R in Circle
    • RY & RX in Elipises
    • FONT-SIZE in text
  • Position
    • X & Y in text and rectangle
    • CY & CX in circle and ellipse
  • Rotation
  • Line Thickness
  • Line Colour
    • Stroke
  • Fill Colour
    • Fill

Virtual Reality Modelling Language (VRML)

Virtual Reality Modelling Language / World Representation Language VRML is a standard for describing interactive 3D objects and worlds. VRML is capable of representing static and animated dynamic 3D and multimedia objects with hyperlinks to other media such as text, sounds, movies, and images.
VRML is a standard for structuring text files. These VRML text files are called WORLD files with the file suffix ’.wrl’.

Common VRML shapes

Common VRML Attributes

  • Rotation
  • Texture
  • Shape
  • Size
  • Position