Gourand shading, Computer Graphics

Assignment Help:

This renders a polygon surface by linearly interpolating intensity values across the surface. Intensity values for each polygon are matched with the values of adjacent polygon along the common edges, thus eliminating the intensity discontinuities that can occur in flat shading. Each polygon surface is rendered with Gourand shading by performing the following calculation:  (i) Determine the average unit normal vector at each polygon vertex. (ii) Apply an illumination model to each vertex to calculate the vertex intensity. (iii) Linearly interpolate the vertex intensities over the surface of the polygon. At each polygon vertex we obtain a normal vector by averaging the surface normal of all polygons sharing that vertex. Thus for vertex position V, we obtain the unit vertex normal width the calculation. One we have the vertex normal's, we determine the intensity at the vertices from a lightning model. Incremental calculations are used to obtain successive edge intensity values between scan lines and to obtain successive intensities along a scan line. 

 

 


Related Discussions:- Gourand shading

Tones and tints, Q. What is the difference between tones and tints? Which o...

Q. What is the difference between tones and tints? Which one component of YIQ color model does black- and- white television use? How can you convert a ZTSC video signal to an RGB s

Multimedia-applications for computer animation, Multimedia: it is the use ...

Multimedia: it is the use of different media to present a specific subject. This representation itself is a multimedia presentation implies; it brings together text and graphics.

What are the advantages of the boundary representation, Advantages of the B...

Advantages of the Boundary Representation (i) This format gives efficient picture generation and easy access to other geometric information. (ii) The changes produced by mos

Design and label the pattern of the folding carton, Question : You have...

Question : You have been approached to design a ‘tuck top auto-lock bottom' carton package for a high-end cosmetic jar under the brand name ‘Beauty One'. Your client asked you

Design a game using graphical user interface, BlackJack is a popular card g...

BlackJack is a popular card game played in many casinos. The player plays against the dealer aiming to reach 21 points, or a score higher than the dealer without exceeding 21. The

Local illumination model - polygon rendering, Local Illumination Model - Po...

Local Illumination Model - Polygon Rendering In this only light that is directly reflected by a light source through a surface to our eyes is observed. No explanation is taken

How avar values generate to get realistic movement, How avar values generat...

How avar values generate to get realistic movement There are numerous ways of generating avar values to get realistic movement. One way is to use markers on a real person (or w

Simulating accelerations - computer animation, Simulating Accelerations - C...

Simulating Accelerations - Computer Animation In previous block, we have seen the dominance and function of mathematics in computer graphics and now, we will undertake the invo

Write a code to continuously rotate square about pivot point, Write a code ...

Write a code to continuously rotate a square about a pivot point.    #include   static GLfloat rotat=0.0;   void init(void); void display(void); void reshape(int w

Define coherence properties, Define coherence properties?  A coherence ...

Define coherence properties?  A coherence property of a scene is a part of a scene by which relate single part of the scene with the other parts of the scene.

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