Gui for plotting functions, Computer Graphics

For this assignment you will write a GUI for plotting functions. The user will supply the de?nition of a function in the variable x, the range of x and y values to be plotted and the number of steps in the plot. The GUI will then display the function. The user can enter any number of functions. Each will be plotted in the chosen colour. The plot information can also be changed - i.e. the x and y ranges and the number of steps. All the functions can then be redrawn using the new setup.

One way to plot a function is to construct a sequence

< (x1, y1), (x2, y2), . . . , (xn, yn) >

where x1 is the smallest value of x, xn is the largest value of x, n is the number of steps, each yi is the result of applying the function to xi and all the xi are equally spaced. The lines from (xi, yi) to (xi+1, yi+1) are then drawn to produce an approximation to the function. The larger the number of steps, the better the approximation.

Typically though, the sequence is not really constructed. All that is needed is the pairs of adjacent points so that a line can be drawn between them. The assignment support ?le de?nes an iterator that generates the required sequence.

Below is an example of plotting the function x2 from -5 to 5 in 6 steps. First a line from (-5, 25) to (-3, 9) is drawn followed by the line from (-3, 9) to (-1, 1), followed by the line from (-1, 1) to (1, 1), followed by the line from (1, 1) to (3, 9), followed by the line from (3, 9) to (5, 25).

931_GUI for Plotting Functions.png

For the actual plotting you will be using a canvas widget. The canvas has a given width and height while the plotting parameters specify ranges for x and y. Therefore a conversion is required that map 'real world' coordinates (i.e. the x,y values) to screen (canvas) coordinates. Remember that in the 'real world' y values increase as you move up while on a canvas they decrease as you move up. The assignment support ?le de?nes a coordinates conversion class that does this job.

Assignment Tasks

For each class and method that you write you need to provide a suitable comment giving a description and where necessary the type and any preconditions. You should use the triple-quote commenting style.

Posted Date: 2/28/2013 12:53:19 AM | Location : United States







Related Discussions:- Gui for plotting functions, Assignment Help, Ask Question on Gui for plotting functions, Get Answer, Expert's Help, Gui for plotting functions Discussions

Write discussion on Gui for plotting functions
Your posts are moderated
Related Questions
a__________of a scene is apart of a scene by which relate one part of the scene with the other parts of the scene

why there is coating of phosphorous on CRT screen?


Question: Is CAD only helpful for design drawings? No. When true-scale, structurally valid drawings are the purpose for CAD's existence; it utilizes is as diverse as imagination

Arguments made in favor of Digital Sound Dynamic range. Lower noise floor. Immunity to wow and flutter. Absence of generation loss. Capability to apply redu

Projections When all display devices are 2D, you need to devise methods that give a realistic view of a 3D scene onto 2D display. With more and more devices coming in the marke

Types of Basic Tools Different types of basic tools for creating and editing multimedia components are: Drawing and Painting tools Image editing tools OCR softwar

Multimedia as the name suggests MULTI and MEDIA utilizes some media for example: text, graphics, audio, video and also animation, to convey information. Multimedia also consider to


Photo Editing Photo-editing programs are paint programs: it just like they comprise several sophisticated functions for altering images and for scheming aspects of the image,