Difference between revisions of "Render Part A Assignment"
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=Code to Implement= | =Code to Implement= | ||
| − | Each of the renderable components has its own file in the <code>src/main/ruby/drawings</code> directory. | + | Each of the renderable components has its own file in the <code>src/main/ruby/drawings/core</code> directory. |
Be sure to add accessors for all constructor parameters. | Be sure to add accessors for all constructor parameters. | ||
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==Equilateral Triangle== | ==Equilateral Triangle== | ||
| − | {{RubyToImplement|equilateral_triangle|drawings|EquilateralTriangle|Object|initialize(half_side_length)<br/>half_side_length()<br>half_side_length=()<br/>render()}} | + | {{RubyToImplement|equilateral_triangle|drawings/core|EquilateralTriangle|Object|initialize(half_side_length)<br/>half_side_length()<br>half_side_length=()<br/>render()}} |
[[File:Equilateral Triangle Render Studio.svg]] | [[File:Equilateral Triangle Render Studio.svg]] | ||
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So, the bottom left point A's x coordinate should be <code>-half_side_length</code> and its y coordinate should be <code>-1/3 height</code>. | So, the bottom left point A's x coordinate should be <code>-half_side_length</code> and its y coordinate should be <code>-1/3 height</code>. | ||
| − | {{RubyToRun|equilateral_triangle|drawings|main}} | + | {{RubyToRun|equilateral_triangle|drawings/core|main}} |
[[File:Render_equilateral_triangle.png]] | [[File:Render_equilateral_triangle.png]] | ||
==Rectangle== | ==Rectangle== | ||
| − | {{RubyToImplement|rectangle|drawings|Rectangle|Object|initialize(half_width, half_height)<br/>half_width()<br>half_width=()<br/>half_height()<br>half_height=()<br/>render()}} | + | {{RubyToImplement|rectangle|drawings/core|Rectangle|Object|initialize(half_width, half_height)<br/>half_width()<br>half_width=()<br/>half_height()<br>half_height=()<br/>render()}} |
Add an [https://www.rubyguides.com/2018/11/attr_accessor/ accessors] for half_width and half_height. | Add an [https://www.rubyguides.com/2018/11/attr_accessor/ accessors] for half_width and half_height. | ||
| − | {{RubyToRun|rectangle|drawings|main}} | + | {{RubyToRun|rectangle|drawings/core|main}} |
[[File:Render_rectangle.png]] | [[File:Render_rectangle.png]] | ||
==Ellipse== | ==Ellipse== | ||
| − | {{RubyToImplement|ellipse|drawings|Ellipse|Object|initialize(x_radius, y_radius)<br/>x_radius()<br>x_radius=()<br/>y_radius()<br>y_radius=()<br/>render()}} | + | {{RubyToImplement|ellipse|drawings/core|Ellipse|Object|initialize(x_radius, y_radius)<br/>x_radius()<br>x_radius=()<br/>y_radius()<br>y_radius=()<br/>render()}} |
Add an [https://www.rubyguides.com/2018/11/attr_accessor/ accessors] for x_radius and y_radius. | Add an [https://www.rubyguides.com/2018/11/attr_accessor/ accessors] for x_radius and y_radius. | ||
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delta_theta = (2*Math::PI) /slice_count</nowiki> | delta_theta = (2*Math::PI) /slice_count</nowiki> | ||
| − | {{RubyToRun|ellipse|drawings|main}} | + | {{RubyToRun|ellipse|drawings/core|main}} |
[[File:Render_ellipse.png]] | [[File:Render_ellipse.png]] | ||
==CircularSegment== | ==CircularSegment== | ||
| − | {{RubyToImplement|circular_segment|drawings|CircularSegment|Object|initialize(x_radius, y_radius, theta_a, theta_z)<br/>render()}} | + | {{RubyToImplement|circular_segment|drawings/core|CircularSegment|Object|initialize(x_radius, y_radius, theta_a, theta_z)<br/>render()}} |
In geometry a [https://en.wikipedia.org/wiki/Chord_(geometry) chord] is a line segment which joins two points on a curve. We will define a <code>class CircularSegment</code> which renders a filled shape of an ellipse cut at the chord between theta_a and theta_z. | In geometry a [https://en.wikipedia.org/wiki/Chord_(geometry) chord] is a line segment which joins two points on a curve. We will define a <code>class CircularSegment</code> which renders a filled shape of an ellipse cut at the chord between theta_a and theta_z. | ||
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Note: a Chord with 32 slices will have 33 points. | Note: a Chord with 32 slices will have 33 points. | ||
| − | {{RubyToRun|circular_segment|drawings|main}} | + | {{RubyToRun|circular_segment|drawings/core|main}} |
[[File:Render_chord.png]] | [[File:Render_chord.png]] | ||
==Image== | ==Image== | ||
| − | {{RubyToImplement|image|drawings|Image|Object|initialize(path)<br/>render()}} | + | {{RubyToImplement|image|drawings/core|Image|Object|initialize(path)<br/>render()}} |
should draw the pixels from (0,0) | should draw the pixels from (0,0) | ||
| − | {{RubyToRun|image|drawings|main}} | + | {{RubyToRun|image|drawings/core|main}} |
[[File:Render_image.png]] | [[File:Render_image.png]] | ||
==Text== | ==Text== | ||
| − | {{RubyToImplement|text|drawings|Text|Object|initialize(text, font)<br/>render()}} | + | {{RubyToImplement|text|drawings/core|Text|Object|initialize(text, font)<br/>render()}} |
Alert: while you must convert the specified font to a bitmap font via: | Alert: while you must convert the specified font to a bitmap font via: | ||
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this must be not be performed in the constructor. Hang onto the font in an instance variable and convert it to a bitmap font later during rendering. | this must be not be performed in the constructor. Hang onto the font in an instance variable and convert it to a bitmap font later during rendering. | ||
| − | {{RubyToRun|text|drawings|main}} | + | {{RubyToRun|text|drawings/core|main}} |
[[File:Render_text.png]] | [[File:Render_text.png]] | ||
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==Bézier Curve== | ==Bézier Curve== | ||
| − | {{RubyToImplement|bezier_curve|drawings|BezierCurve|Object|initialize(control_points)<br/>render()}} | + | {{RubyToImplement|bezier_curve|drawings/core|BezierCurve|Object|initialize(control_points)<br/>render()}} |
NOTE: you need not implement the interpolation yourself. Use the [https://www.cse.wustl.edu/~dennis.cosgrove/courses/cse425s/current/doc/Graphics.html#draw_curve-instance_method draw_curve] method on [https://www.cse.wustl.edu/~dennis.cosgrove/courses/cse425s/current/doc/Graphics.html Graphics]. | NOTE: you need not implement the interpolation yourself. Use the [https://www.cse.wustl.edu/~dennis.cosgrove/courses/cse425s/current/doc/Graphics.html#draw_curve-instance_method draw_curve] method on [https://www.cse.wustl.edu/~dennis.cosgrove/courses/cse425s/current/doc/Graphics.html Graphics]. | ||
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|} | |} | ||
| − | {{RubyToRun|bezier_curve|drawings|main}} | + | {{RubyToRun|bezier_curve|drawings/core|main}} |
[[File:Render_bezier_curve.png]] | [[File:Render_bezier_curve.png]] | ||
Revision as of 12:11, 18 April 2023
Contents
Diagram
Graphics
Code to Implement
Each of the renderable components has its own file in the src/main/ruby/drawings/core directory.
Be sure to add accessors for all constructor parameters.
Equilateral Triangle
| file: | src/main/ruby/drawings/core/equilateral_triangle.rb |  |
| class: | EquilateralTriangle | |
| superclass: | Object | |
| methods: | initialize(half_side_length) half_side_length() half_side_length=() render() |
WARNING: Ruby division of two integers results in an integer. For example: 1/3 == 0
The triangle should be equilateral, rendered with its the origin at the center of mass.
Your constructor should accept a half_side_length parameter.
Add an accessor for half_side_length.
The height of the triangle should be side_length * sqrt(3)/2
The center of mass is one third from the bottom.
So, the bottom left point A's x coordinate should be -half_side_length and its y coordinate should be -1/3 height.
| file to run: | src/main/ruby/drawings/core/equilateral_triangle.rb | |
Rectangle
| file: | src/main/ruby/drawings/core/rectangle.rb | |
| class: | Rectangle | |
| superclass: | Object | |
| methods: | initialize(half_width, half_height) half_width() half_width=() half_height() half_height=() render() |
Add an accessors for half_width and half_height.
| file to run: | src/main/ruby/drawings/core/rectangle.rb | |
Ellipse
| file: | src/main/ruby/drawings/core/ellipse.rb | |
| class: | Ellipse | |
| superclass: | Object | |
| methods: | initialize(x_radius, y_radius) x_radius() x_radius=() y_radius() y_radius=() render() |
Add an accessors for x_radius and y_radius.
Note: to produce the reference image the code below was used:
slice_count = 32
delta_theta = (2*Math::PI) /slice_count
| file to run: | src/main/ruby/drawings/core/ellipse.rb | |
CircularSegment
| file: | src/main/ruby/drawings/core/circular_segment.rb | |
| class: | CircularSegment | |
| superclass: | Object | |
| methods: | initialize(x_radius, y_radius, theta_a, theta_z) render() |
In geometry a chord is a line segment which joins two points on a curve. We will define a class CircularSegment which renders a filled shape of an ellipse cut at the chord between theta_a and theta_z.
Note: to produce the reference image the code below was used:
slice_count = 32
delta_theta = (@theta_z-@theta_a) / slice_count
Note: a Chord with 32 slices will have 33 points.
| file to run: | src/main/ruby/drawings/core/circular_segment.rb | |
Image
| file: | src/main/ruby/drawings/core/image.rb | |
| class: | Image | |
| superclass: | Object | |
| methods: | initialize(path) render() |
should draw the pixels from (0,0)
| file to run: | src/main/ruby/drawings/core/image.rb | |
Text
| file: | src/main/ruby/drawings/core/text.rb | |
| class: | Text | |
| superclass: | Object | |
| methods: | initialize(text, font) render() |
Alert: while you must convert the specified font to a bitmap font via:
bitmap_font = OpenGLUtils.to_bitmap_font(@font)
this must be not be performed in the constructor. Hang onto the font in an instance variable and convert it to a bitmap font later during rendering.
| file to run: | src/main/ruby/drawings/core/text.rb | |
Bézier Curve
| file: | src/main/ruby/drawings/core/bezier_curve.rb | |
| class: | BezierCurve | |
| superclass: | Object | |
| methods: | initialize(control_points) render() |
NOTE: you need not implement the interpolation yourself. Use the draw_curve method on Graphics.
| Quadratic (Second Order) Curve: | 
|
|
| Quadratic (Third Order) Curve: | 
|
|
| Fourth Order Curve: | 
|
|
| file to run: | src/main/ruby/drawings/core/bezier_curve.rb | |
Testing Your Solution
Unit Test
| file: | src/test/ruby/drawings/core/relatively_fast/part_a/*.rb | UnitTest |
note: ensure that you have removed all printing to receive credit for any assignment.
| file: | src/test/ruby/drawings/core/relatively_slow/part_a/*.rb | UnitTest |
note: ensure that you have removed all printing to receive credit for any assignment.
Visual Comparison
| file to run: | src/test/ruby/drawings/core/snapshots/part_a_snapshots_web_page_generator.rb | |
Somewhat Outdated Testing Demo
