CMSC 330 Mission 1
The first programming project involves extending the Java skeleton program that it’s a long way equipped in
the linked .zip file. That skeleton program shows a scene of graphic photos contained in a
scene definition file. The grammar for that scene definition file is proven below:
scene → SCENE IDENTIFIER number_list photos END ‘.’
photos → image photos | image
image → right_triangle | rectangle
right_triangle →
RIGHT_TRIANGLE COLOR number_list AT number_list HEIGHT NUMBER WIDTH
NUMBER ‘;’
rectangle →
RECTANGLE_ COLOR number_list AT number_list HEIGHT NUMBER WIDTH
NUMBER ‘;’
number_list → ‘(‘ numbers ‘)’
numbers → NUMBER | NUMBER ‘,’ numbers
In the above grammar, terminal symbols are upper case names or personality literals proven in blue
and nonterminal symbols are lower case names proven in red. EBNF metacharacters are proven in
sunless. Tokens can even be separated by any assortment of areas. Identifiers and key phrases are strings of
alphabetic characters. Identifiers are case soft. Numbers are unsigned integers.
That program reads within the scene definition file that defines the image objects in a scene and
creates these objects, inserts them into the scene and shows that scene.
You would possibly be to vary this system so that this is in a position to parse and prove the further photos defined by
the expanded grammar proven below with the additions to the grammar highlighted in yellow:
scene → SCENE IDENTIFIER number_list photos END ‘.’
photos → image photos | image
image →
right_triangle | rectangle | parallelogram | regular_polygon | isosceles
| textual exclaim material
right_triangle →
RIGHT_TRIANGLE COLOR number_list AT number_list HEIGHT NUMBER WIDTH
NUMBER ‘;’
rectangle →
RECTANGLE_ COLOR number_list AT number_list HEIGHT NUMBER WIDTH
NUMBER ‘;’
parallelogram →
PARALLELOGRAM COLOR number_list AT number_list number_list OFFSET
NUMBER ‘;’
regular_polygon →
REGULAR_POLYGON COLOR number_list AT number_list SIDES NUMBER RADIUS
NUMBER ‘;’
isosceles →
ISOSCELES COLOR number_list AT number_list HEIGHT NUMBER WIDTH
NUMBER ‘;’
textual exclaim material →
TEXT COLOR number_list AT number_list STRING ‘;’
number_list → ‘(‘ numbers ‘)’
numbers → NUMBER | NUMBER ‘,’ numbers
The UML plot for all the project is proven below:
The classes proven in sunless are included within the skeleton project. You wish to total the project
by writing these classes proven in red, modifying the Parser class so that this is in a position to parse the
expanded grammar, modifying the Lexer class to deal with string tokens, and modifying the
Tokens enumerated variety to add the total unusual tokens.. Under is a first-rate level opinion of every and each of the five
classes that you have to jot down:
The Textual exclaim material class must dangle a constructor that is equipped the color that defines the textual exclaim material color, a
level that specifies the textual exclaim material location and a string containing the textual exclaim material to be displayed. It must also
dangle a plan perform because it’s a long way extends the abstract class Describe. The plan perform must
plan the textual exclaim material the usage of the ability drawString in Graphics class.
The SolidPolygon class must dangle a constructor that is passed the assortment of vertices within the
polygon and its color. It must define the ability drawPolygon because it’s a long way extends the abstract
class Polygon_. It would possibly name the fillPolygon technique of the Graphics class to plan a solid
polygon.
The IsoscelesTriangle class must have a constructor that is equipped the color of the triangle,
a degree that specifies the placement of the prime vertex, and the height and width of the triangle. It
must allocate the arrays of x and y coordinates that defines the triangle and it must compute their
values.
The Parallelogram class must have a constructor that is equipped the color of the parallelogram,
two aspects that specifies the placement of the upper left and lower lovely vertices besides to
an x offset tag that specifies the x distance between the upper and lower left vertices. It must
allocate the arrays of x and y coordinates that defines the parallelogram and it must compute their
values.
The RegularPolygon class must dangle a constructor that is equipped the color of the polygon,
the assortment of facets, a degree that specifies the placement of its center, and the radius, which defines
the space between the center and each of the vertices. It must allocate the arrays of x and y
coordinates that defines the customary polygon and it must compute their values.
Under is a pattern of a scene definition file that can provide input to this system:
Scene Polygons (500, 500)
RightTriangle Colour (255, 0, 0) at (50, 30) Top 100 Width 300;
Rectangle Colour (0, 128, 255) at (100, 100) Top 200 Width 100;
Isosceles Colour (255, 0, 0) at (120, 120) Top 100 Width 200;
Parallelogram Colour (0, 0, 255) at (340, 50) (440, 120) Offset 30;
RegularPolygon Colour(255, 0, 255) at (300, 300) Facets 6 Radius 80;
Textual exclaim material Colour(0, 0, 0) at (400, 200) “Howdy World”;
Cease.
Gape that the token names are all upper case and would possibly dangle underscores whereas the
corresponding lexemes at in title case without underscores. For instance the token
RIGHT_TRIANGLE has lexeme RightTriangle. The lexical analyzer within the skeleton handles the
obligatory conversion. Proven below is the scene that must be produced when this system is
equipped with the above scene definition.
The deliverables for this project embrace the next:
1. A .zip file containing the total provide code properly enforcing all required
functionality.
a. The total .java files equipped within the skeleton will must included in spite of whether
they required any changes
b. All unusual files must embrace a header with the student title, date, project and a
description of what the file incorporates
c. All modified files must embrace a header with the identical files
2. A Word or PDF file that comes with the next:
a. A dialogue of the system you approached the project
b. A test intention that comes with test circumstances that embrace all further photos and test any
unusual functionality. For every and each test case, the output produced needs to be included.
c. A dialogue of lessons learned from the project and any improvements that can
be made
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