Visible-surface detection, Computer Graphics

Visible-Surface Detection

For the generation of realistic graphics display you know that hidden surfaces and hidden lines should be identified for removing. For this reason we require to conduct visibility tests. Visibility tests try to specify the visible surfaces or visible edges such are visible from a specified viewpoint. Visibility tests are performed via making use of either

object-space or              

 image-space or

Both object-space and image-spaces.

Object-space approaches utilize the directions of a surface normal with respect to a viewing direction to identify a back face. Image-space approaches employ two buffers as: one for storing the pixel intensities and the other for updating the depth of the visible surfaces from the view plane. A method that uses both image-space and object-space employs depth for sorting or reordering of surfaces. In this category this methods also utilize image-space for conducting visibility type tests. While making visibility tests, coherency property is employed to make the method extremely fast.

In this matter, we will discuss three algorithms or methods for detecting visible surfaces as:

  • Depth-buffer method
  • Scan-line method
  • Area subdivision method

Depth-buffer method and Scan-line method come beneath the category of image-space, and area-subdivision method utilizes both image-space and object-space approach.

Posted Date: 3/22/2013 8:26:24 AM | Location : United States







Related Discussions:- Visible-surface detection, Assignment Help, Ask Question on Visible-surface detection, Get Answer, Expert's Help, Visible-surface detection Discussions

Write discussion on Visible-surface detection
Your posts are moderated
Related Questions
how you doing the graphic?


deffrent between vecgen algorithm and bresenham line algorithm in computer graphic

Question: a) Datagram packet delivery and Virtual circuit packet delivery are two approaches to the delivery of packets by the network layer. Explain. b) What is the meaning

Question: (a) List and explain different types of lights that can be used in After Effects. (b) How is the density of dots between the boxes in a motion path related to th

Write short notes on active and passive transformations?  In the active transformation the points x and x| show different coordinates of the similar coordinate system. Here all

How many 128 x 8 RAM chips are needed to provide a memory capacity of 4096 16 bits?

what is the numerical numbers

3-D Transformation The capability to represent or display a three-dimensional object is basically to the knowing of the shape of that object. Moreover, the capability to rotat

Multimedia Business: Even fundamental office applications as a MS word processing package or a MS Excel spreadsheet tool turns into a powerful tool along with the aid of mult