Buffer areas required for z-buffer algorithm, Computer Graphics

Assignment Help:

Buffer Areas Required For Z-Buffer Algorithm

For applying z-buffer algorithm, we need two buffer areas or two 2-Dimentional arrays:

1) Depth-buffer [i,j], to save the depth-value of the visible surface for all pixel in the view plane, and

2) Refresh-buffer [i,j], to save the pixel intensities of the visible surfaces.

A. In contrast to z/depth-buffer method, Scan-line method deals along with numerous surfaces. Since it processes each scan-line at one time, all polygons intersected through such scan-line are examined to find out that surfaces are visible. The visibility test engages the comparison of depths of each overlapping surfaces to find out one is nearer to the view plane. If it is determines so, then it is declared like a visible surface and the intensity values at the positions beside the scan-line are entered in the refresh-buffer.

B. Area-subdivision method is fundamentally an image-space method but utilizes object- space computations for reordering of surfaces as per to depth. The method makes utilization of area coherence in a scene by collecting those areas which form part of a particular surface. In this method, we successively subdivide the whole viewing area in small rectangles till each small area is the projection of part of a particular visible surface or no surface in any way.


Related Discussions:- Buffer areas required for z-buffer algorithm

Where the video controller is used, Where the video controller is used?  ...

Where the video controller is used?  A special purpose processor, which is used to control the operation of the display device, is called as display controller or video control

What are the features found in CAD, What are the features found in CAD ...

What are the features found in CAD Features generally found in a CAD package involve: - 2D and 3D modelling - Wire frame - Library of parts that can be used in new dra

Question, what are the steps involved in 3d transformation explain

what are the steps involved in 3d transformation explain

Sub classes of orthographic projection, Sub Classes of Orthographic Project...

Sub Classes of Orthographic Projection There are three ordinary sub-classes of Orthographic (axonometric) projections as: 1) Isometric: The direction of projection makes

Applications of ray tracing - modeling and rendering , Applications of Ray ...

Applications of Ray Tracing Thus, you might ask, just what practical utilizes does ray tracing have: a) For vision research, simulation of real-world phenomena, b) Medica

Oblique projection, find the transformation and draw the cube for cavalier...

find the transformation and draw the cube for cavalier and cabinet with theta = 37 degree

Multimedia applications, what are activities to be undertaken or executed a...

what are activities to be undertaken or executed and the expected output of each activity for a plan creation of a movie?

Shading , short note on shading

short note on shading

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd