Flashcards
Virtual Modelling
Cards in this deck (7)
- 1A 3D image can give a more realistic impression than a 2D image. Many designers will construct new products on screen that can be easily modified and manipulated. These virtual products can be tested and evaluated on screen without actually being manufactured.Rarely is a feature film released nowadays without containing computer-generated special effects and even actor. 3D animation starts with a wire frame model being created on-screen that can be viewed in all directions using built-in camera angles in the computer software.
- 2Wire frame model - a wire frame model is a visual representation of a 3D object created using a collection of straight lines, curves and intersections. The result is a transparent 'skeleton' of a drawing that gives an impression of the overall 3D structure.
- 3Advantages of wire frame model: *Simple and fast to calculate on a computer. *Able to view changes or rotate the object without long delaysDisadvantages of wire frame model:
*Difficult to read or interpret as all hidden lines are also in view
*Lacking in detail i.e. no surface finishes. - 4Surface model - a surface or 'skin' is added to the wire frame model, making it a more realistic picture of the 3D object.
- 5Advantages of Surface model: *Greater definition of contours and surfaces. *Hidden lines can be removed to give a more solid feel.Disadvantages of Surface model:
*Does not give any information about surface finishes and textures. - 6Solid model - the production of a full digital representation of an object complete with the properties of the solid form.
- 7Advantages of Solid model: *Clear communication - no confusion. *Photo-realistic image produced using rendering techniques to apply shading, pattern and texture.Disadvantages of Solid model:
*Complex data required, therefore slow to update and render objects.
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- A-Levels Graphical Products AS (Modelling and prototyping) Flashcards on Virtual Modelling, created by Poppy Venables on 13/05/2013.
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- Poppy Venables
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