Problems at shared vertices - modeling and rendering, Computer Graphics

Assignment Help:

Problems at Shared Vertices - Modeling and Rendering

Shading discontinuities can arise while two adjacent polygons fail to share a vertex which lies along their common edge. Identify the three polygons of figure 17, wherein vertex C is shared through the two polygons on the right, although not by the large polygon on the left. The shading information found directly at C for the polygons at the right will classically not be the same as the information interpolated at such point from the values at A and B for the polygon at the left.

155_Problems at Shared Vertices - Modeling and Rendering.png

Figure: Vertex C is shared by the two polygons on the right, but not by the larger Rectangular polygon on the left.

As an outcome, there will be a discontinuity in the shading. The discontinuity can be eliminated via inserting in the polygon on the left an extra vertex that shares C's shading information. We can pre-process a static polygonal database in sequence to eliminate this matter; conversely, if polygons will be split on the fly for example: through using the BSP-tree visible-surface algorithm, so extra bookkeeping can be finish to initiate a new vertex in an edge that shares an edge which is split.

773_Problems at Shared Vertices - Modeling and Rendering 1.png

Figure: Problems with computing vertex normal. Vertex normal are all parallel


Related Discussions:- Problems at shared vertices - modeling and rendering

What is fixed point scaling, What is fixed point scaling?  The location...

What is fixed point scaling?  The location of a scaled object can be controlled by a position known as the fixed point that is to remain unchanged after the scaling transformat

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

What is a spline, What is a spline?  To produce a smooth curve by a des...

What is a spline?  To produce a smooth curve by a designed set of points, a flexible strip called spline is used. Like spline curve can be mathematically explained with a piece

Rotation about an arbitrary axis, Rotation about an arbitrary axis Rota...

Rotation about an arbitrary axis Rotation about an arbitrary axis is a composition of several rotations and translation operations. What you need to do is the following:  a)

Functions available in animation packages, Functions Available in Animation...

Functions Available in Animation Packages Some broad functions available in animation packages are as: Object Function to manage and store the object database , where

How to control the contents of the video buffer, OBJECTIVE Since graphic...

OBJECTIVE Since graphics plays a very important role in modern computer application, it is important to know more information about its hardware and software operations. Despite

Student, hi I need help with photoshop

hi I need help with photoshop

Important points about the surface of revolution, Important points about th...

Important points about the Surface of Revolution a) if a point on base curve is given by parametric form, that are: (x(u), y(u), z(u)) so surface of revolution regarding to th

Photoshop, What is the best selection method in photoshop

What is the best selection method in photoshop

Display necessitate to store z-buffer?, Suppose here, one allows 256 depth ...

Suppose here, one allows 256 depth value levels to be employed. Approximately how much memory would a 512x512 pixel display necessitate to store z-buffer? Solution : A system w

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