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Assignment :

Graphical Programming Language Application This assignment is to use what you have learned to produce a fairly complex program. It involves version control, unit testing, the use of design patterns and automatic documentation generation. The idea of the program is to produce a simplified environment for teaching simple programming concepts. You are to create a simple programming language that has the basics of sequence, selection and iteration and allows a student programmer to explore them using graphics.

1 Management -- 20 marks total

Set up version control (5 marks)
Early commit, project description
At least five commits of software
Unit Tests (10 marks)
Fully implemented as unit tests.
Appropriately documented
Agile Development (5 marks)
Evidence of Agile

2 Implementation -- 50 Marks total

Command parser class
Reads and executes commands on command line one at a time
Reads a program and executes it with a “run” command
Saves and loads a program (5 marks)
Syntax checking
Checks for valid commands
Checks for valid parameters (5 marks)

Basic drawing

Position pen, pen up/down, pen move
Draw basic shapes rectangle, circle, triangle (5 marks)
Draw advanced shapes polygon, texture, 3D (5 marks) -
Programming commands
Simple repeat command with plus or minus parameter (5 marks)
E.g. repeat 4 circle + 10 (draws 4 circles centered at the same point getting bigger by 5 pixels each time) This should work for all shapes
Variables - allow loops to define variables to pass as parameters to draw commands (5 marks)

Loop command (10 marks)

Repeats everything between Loop on the first line and “end” on a later line.
If statement (10 marks)
5 marks for one line
5 marks for block with “endif”

3 Design and Implementation Standard -- 20 marks total

Use of design patterns - factory class (10 marks)
All shape classes should use appropriate inheritance but should also use the factory design pattern.
Code documented with XML tags, XML documentation produced (5 marks)
Use of exception handling (including user generated exceptions) (5 marks)

4 Additional functionality -- 10 marks total

Here you can come up with your own functionality. Here are some suggestions but you are free to come up with your own, however you should discuss them with your tutor first.
Additional commands, one example might be to transform/rotate shape, more complex shapes and the drawing of shapes
Methods. Allow your program to define and call methods.
Full user interface with graphical “Visual Studio-like” from end for graphic programming that allows drag and drop but write the code

Command Examples

The pen position is stored in the drawing object. Commands should not be case sensitive.

            
              DrawTox,y 

              MoveTox,y 

              Circle <radius> 

              Rectangle <width>, <height>

              Triangle <base>, <adj>, <hyp> 

              Polygon [points,...]

Complex commands

repeat 4 circle radius +10 (would draw 4 circles with progressively 10 pixel bigger radii centered at the current pen position)

            
              Radius = 20 

              Width = 20 

              Height = 20 

              Loop 4 

              Circle radius 

              Radius+10 

              Rectangle width, height 

              Width+10 

              Height + 10 

              Endloop

For a loop you should declare a standard variable “counter” which takes the iteration number and can be used in the program inside the loop


              If counter = 5 then radius+25

To Continue Click Here > Graphical Programming Language Application.pdf