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Description
Flashcards by Poppy Venables, updated more than 1 year ago
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Created by Poppy Venables
over 11 years ago
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| Question | Answer |
| A 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. |
| Wire 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. |
Image:
wire_frame (image/jpg)
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| Advantages of wire frame model: *Simple and fast to calculate on a computer. *Able to view changes or rotate the object without long delays | Disadvantages 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. |
| Surface model - a surface or 'skin' is added to the wire frame model, making it a more realistic picture of the 3D object. |
Image:
surface_model (image/jpg)
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| Advantages 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. |
| Solid model - the production of a full digital representation of an object complete with the properties of the solid form. |
Image:
solid_model (image/jpg)
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| Advantages 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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