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

Chemistry-applications for computer animation, Chemistry: Computer animati...

Chemistry: Computer animation is a very helpful tool in chemistry. Several things in chemistry are too small to see, and handle or do experiments on like, molecules and atoms for

Resolution - display devices, Resolution - Display Devices On a display...

Resolution - Display Devices On a display device, the resolution means the maximum number of points that can be displayed simultaneously without an overlap in a row and number

Objectives of 2-d viewing and clipping, Objectives of 2-D Viewing and Clipp...

Objectives of 2-D Viewing and Clipping After going through this section, you should be capable to: 1. Describe the concept of clipping, 2. Observe how line clipping is p

Key frames -traditional animation techniques, Key Frames -Traditional Anima...

Key Frames -Traditional Animation Techniques The senior artists go and draw the main frames of the animation, after a storyboard has been laid out. These main frames are frame

Accessories, Accessories : A Screen Grabber is a necessary accessory. Bitm...

Accessories : A Screen Grabber is a necessary accessory. Bitmap images are so common in multimedia, that it is important to have a tool for grabbing all or part of the screen disp

List of 3-d animation software, List of 3-D Animation Software Here is ...

List of 3-D Animation Software Here is a short list of several 3-D animation software are - Softimage ( Microsoft) -  Alias/Wavefront ( SGI) -  3D studia MAX (Autodesk

Prepare an initial sorted edge list, Q: For the following polygon, prepare ...

Q: For the following polygon, prepare an initial sorted edge list and then make the active edge list for scan lines y = 5,20,30,35 Coordinates of the vertices are as shown in Figur

Numerical analysis packages-image processing, Numerical Analysis Packages: ...

Numerical Analysis Packages: generally utilized software is: MatLab. Characteristics: Focus generally on numeric processing. Programming with mathematical skills usuall

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