Difference between revisions of "Render Part D Assignment"
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=Code to Implement= | =Code to Implement= | ||
==Composite== | ==Composite== | ||
− | {{RubyModuleToImplement|composite|drawings|Composite|initialize_components()<br/>push_component(component)<br/> | + | {{RubyModuleToImplement|composite|drawings|Composite|initialize_components()<br/>push_component(component)<br/>untransformed_render()<br/>untransformed_bounds()}} |
module Composite should define methods <code>initialize_components</code>, <code>push_component</code>, <code>untransformed_render</code>, and <code>untransformed_bounds</code>. | module Composite should define methods <code>initialize_components</code>, <code>push_component</code>, <code>untransformed_render</code>, and <code>untransformed_bounds</code>. |
Revision as of 02:28, 4 May 2023
In this studio we will evolve our code from Render_Part_C_Assignment to leverage mixins.
Continue editing files in the render/assignment directory.
Contents
Background
Mixins are achieved in Ruby by including with modules.
module Nameable def introduce "Hello. My name is #{@name}." end end class Person include Nameable def initialize(name) @name = name end end class Car include Nameable def initialize(name) @name = name end end prof_grossman = Person.new("Dan") love_bug = Car.new("Herbie") puts prof_grossman.introduce puts love_bug.introduce
Warning
Do NOT use the include
keyword in Ruby as you would typically in C or C++.
Be sure to include within the intended class or module definition.
If you include
at the top-level, it will mixin to Object
!
This may or may not rip a hole in the universe.
Code to Implement
Composite
file: | src/main/ruby/drawings/composite.rb | ![]() |
module: | Composite | |
methods: | initialize_components() push_component(component) untransformed_render() untransformed_bounds() |
module Composite should define methods initialize_components
, push_component
, untransformed_render
, and untransformed_bounds
.
initialize_components
add an instance variable with a suitable name to store an array of components
NOTE: initialize_components() must be private.
push_component
push a component onto your array instance variable.
untransformed_render
Similar to the untransformed render on CompositeTransform and Scene from Part C.
untransformed_bounds
Similar to the untransformed bounds calculations on CompositeTransform and Scene from Part C.
CompositeTransform
Be sure to add:
require_relative 'composite' |
![]() |
Mixin your Composite module to the CompositeTransform class.
include Composite
Be sure to invoke initialize_components
from the constructor and clean up existing code.
Scene
Be sure to add:
require_relative 'composite' |
![]() |
Mixin your Composite module to the Scene class.
include Composite
Be sure to invoke initialize_components
from the constructor and clean up existing code.
Testing Your Solution
Unit Test
file: | src/test/ruby/drawings/core/relatively_fast/part_d/*.rb | ![]() |
note: ensure that you have removed all printing to receive credit for any assignment.
Backwards Compatibility
file: | src/test/ruby/drawings/core/relatively_fast/part_a/*.rb | ![]() |
note: ensure that you have removed all printing to receive credit for any assignment.
file: | src/test/ruby/drawings/core/relatively_fast/part_b/*.rb | ![]() |
note: ensure that you have removed all printing to receive credit for any assignment.
file: | src/test/ruby/drawings/core/relatively_fast/part_c/*.rb | ![]() |
note: ensure that you have removed all printing to receive credit for any assignment.