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

Unity, what I unity of java game?

what I unity of java game?

Briefly explain how you could create the gun barrel effect, Question 1: ...

Question 1: (a) Describe what you understand by Rotoscoping in Graphic effects. Give details how Rotoscoping could be achieved in After Effects CS3. (b) Using one algorithm

Define the meaning of abbreviations of cmyk and rgb, QUESTION You are e...

QUESTION You are employed as a graphics designer in an advertising agency and recently completed a brochure artwork for a client. You need to send the file for printing before

Output primitives and geometric transformations, Output Primitives and Geom...

Output Primitives and Geometric Transformations You learnt how some basic geometric objects such as line segments, circles, ellipses and other curves are processed for plotting

Dtp, pagemaker is a image editor

pagemaker is a image editor

What is persistence, What is persistence? The time it takes the emitted...

What is persistence? The time it takes the emitted light from the screen to decompose one tenth of its original intensity is known as persistence.

Important points about the bezier curves, Important points about the bezier...

Important points about the bezier curves - modeling and rendering 1) Generalizing the idea of Bezier curve of degree at n based upon n+1 control point p0,.....pn P(0)= P 0

Handling mouse input, When you set up your project, create the class as an ...

When you set up your project, create the class as an "ACM Graphics Program", rather than a plain class. This will perform the necessary preparations for you to use mouse input in y

B splines, What is uniform rational splines

What is uniform rational splines

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