Three dimensional concepts and display methods, Computer Graphics

Assignment Help:

Three Dimensional Concepts and Display Methods 

 Imagine yourself taking a picture by a camera.  What do you normally do?  You specify a viewpoint and view direction and then set up a view window.  Once that is done you take a snap and the image of 3D scene/object is captured in a 2D film.  Basic idea behind this is projection from 3D to 2D.  Projections are broadly classified under two names (i) Parallel (ii) Perspective.  When objects are projected onto the display plane along parallel lines, we call it parallel projection.  In this case a view direction is specified and image of points on the object are obtained by taking lines parallel to the view direction and finding their intersection with the display plane.  If you have seen an architectural drawing of a building plan, you would have noticed that they show three different plots, top view, front view and side view normally.  This actually is an example of a parallel projection of the building to be constructed.  On the other hand, perspective projection corresponds more closely to the way a human eye perceives a 3D scene.  A viewpoint is specified and points from the object are projected to the view plane by considering lines emanating from the points on the object and converging to the viewpoint.  Intersections of these converging lines with the display plane make the image of the object under perspective projection.


Related Discussions:- Three dimensional concepts and display methods

Several kinds of dedicated video tele conference devices, There are several...

There are several kinds of dedicated Video Tele Conference devices. Large groups Video Tele Conference are non-portable, large, more expensive devices utilized for large rooms

Dda, differentiate between dda and bresenhams line algorithm

differentiate between dda and bresenhams line algorithm

Opengl, Write a program that allows interactive manipulation of the positio...

Write a program that allows interactive manipulation of the position and orientation of a camera. Draw a teapot at the global origin 0,0,0. You can find a shaded teapot model and

Input and output devices - computer aided design, Input and Output Devices ...

Input and Output Devices - computer aided design Output and Input devices are quite significant for any software since an unsuitable selection of the concerned hardware may tu

Need for video compression, Need for Video Compression: T he high bit ...

Need for Video Compression: T he high bit rates that result from the various types of digital video make their transmission through their intended channels very difficult. Eve

Gourand shading or intensity interpolation scheme, Gourand shading OR Inten...

Gourand shading OR Intensity interpolation scheme Now there polygon is rendered through linearly interpolating intensity values across the surface. Intensity values for all po

How to identify window area - raster graphics and clipping, A convex polygo...

A convex polygonal region having n- vertices {P 0 , P 1 , P 2 ..., P n - 1 , P n , P 0 } or lattice points to be identified by the user includes the convex window area. To be exact

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

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