Render Part C Assignment

In this studio we will evolve our code from Render_Part_B_Assignment to add new methods and a new class.

Continue editing files in the render/assignment directory.

Code to Implement

Bounds

file:	src/main/ruby/render/assignment/bounds.rb
class:	Bounds
superclass:	Object
methods:	initialize(min,max) min() max()

Note: min and max should be instances of Point2d.

Note: You may wish to use Ruby's convenient Struct construct.

Transform

file:	src/main/ruby/render/assignment/transform.rb
class:	Transform
superclass:	Object
methods to evolve:	Ø
methods to add:	move(direction,amount) calculate_bounds()
methods to remove:	Ø

move

the move method will accept two parameters: direction and amount.

direction can be one of four symbols

:left
:right
:up
:down

left corresponds to translating along the negative x axis

right corresponds to translating along the positive x axis

down corresponds to translating along the negative y axis

up corresponds to translating along the positive y axis

any other value for direction should raise an ArgumentError.

calculate_bounds

invoke calculate_local_bounds and transform the returned bounds by x and y.

NOTE: calculate_local_bounds is abstract. it must be defined by the subclasses.

Rectangle

file:	src/main/ruby/render/assignment/rectangle.rb
class:	Rectangle
superclass:	ColorTransform
methods to evolve:	Ø
methods to add:	calculate_local_bounds
methods to remove:	Ø

calculate_local_bounds

Returns an instance of Bounds specified by min and max Point2ds.

Ellipse

file:	src/main/ruby/render/assignment/ellipse.rb
class:	Ellipse
superclass:	ColorTransform
methods to evolve:	Ø
methods to add:	calculate_local_bounds
methods to remove:	Ø

calculate_local_bounds

Returns an instance of Bounds specified by min and max Point2ds.

EquilateralTriangle

file:	src/main/ruby/render/assignment/equilateral_triangle.rb
class:	Rectangle
superclass:	EquilateralTriangle
methods to evolve:	Ø
methods to add:	calculate_local_bounds
methods to remove:	Ø

calculate_local_bounds

Returns an instance of Bounds specified by min and max Point2ds.

BezierCurve, Chord, Image, Text

Imagine what it would be like to define calculate_local_bounds for each of these classes.

Testing Your Solution

Visual Comparison

file to run:

src/test/ruby/render/part_c/part_c_test_snapshots_web_page_generator.rb

Unit Test

file:

src/test/ruby/render/part_c/part_c_unit_test.rb

UnitTest

note: ensure that you have removed all printing to receive credit for any assignment.

file:

src/test/ruby/render/part_c/part_c_move_unit_test.rb

UnitTest

note: ensure that you have removed all printing to receive credit for any assignment.

file:

src/test/ruby/render/part_c/part_c_bounds_unit_test.rb

UnitTest

note: ensure that you have removed all printing to receive credit for any assignment.