Difference between revisions of "Render Part A Assignment"
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==Equilateral Triangle== | ==Equilateral Triangle== | ||
− | {{RubyToImplement|equilateral_triangle| | + | {{RubyToImplement|equilateral_triangle|drawings|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| | + | {{RubyToRun|equilateral_triangle|drawings|main}} |
[[File:Render_equilateral_triangle.png]] | [[File:Render_equilateral_triangle.png]] | ||
==Rectangle== | ==Rectangle== | ||
− | {{RubyToImplement|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()}} |
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| | + | {{RubyToRun|rectangle|drawings|main}} |
[[File:Render_rectangle.png]] | [[File:Render_rectangle.png]] | ||
==Ellipse== | ==Ellipse== | ||
− | {{RubyToImplement|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()}} |
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| | + | {{RubyToRun|ellipse|drawings|main}} |
[[File:Render_ellipse.png]] | [[File:Render_ellipse.png]] | ||
==CircularSegment== | ==CircularSegment== | ||
− | {{RubyToImplement|circular_segment| | + | {{RubyToImplement|circular_segment|drawings|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| | + | {{RubyToRun|circular_segment|drawings|main}} |
[[File:Render_chord.png]] | [[File:Render_chord.png]] | ||
==Image== | ==Image== | ||
− | {{RubyToImplement|image| | + | {{RubyToImplement|image|drawings|Image|Object|initialize(path)<br/>render()}} |
should draw the pixels from (0,0) | should draw the pixels from (0,0) | ||
− | {{RubyToRun|image| | + | {{RubyToRun|image|drawings|main}} |
[[File:Render_image.png]] | [[File:Render_image.png]] | ||
==Text== | ==Text== | ||
− | {{RubyToImplement|image| | + | {{RubyToImplement|image|drawings|Text|Object|initialize(text, font)<br/>render()}} |
− | {{RubyToRun|text| | + | {{RubyToRun|text|drawings|main}} |
[[File:Render_text.png]] | [[File:Render_text.png]] | ||
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==Bézier Curve== | ==Bézier Curve== | ||
− | {{RubyToImplement|bezier_curve| | + | {{RubyToImplement|bezier_curve|drawings|BezierCurve|Object|initialize(control_points)<br/>render()}} |
NOTE: you need not implement the interpolation yourself. Check cavalcade_of_graphics for an example of how to draw a curve. | NOTE: you need not implement the interpolation yourself. Check cavalcade_of_graphics for an example of how to draw a curve. | ||
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|} | |} | ||
− | {{RubyToRun|bezier_curve| | + | {{RubyToRun|bezier_curve|drawings|main}} |
[[File:Render_bezier_curve.png]] | [[File:Render_bezier_curve.png]] |
Revision as of 01:22, 14 November 2022
Contents
OpenGL
GLUT
Code to Investigate
Cavalcade of Graphics
file to run: | src/main/ruby/render/examples/cavalcade_of_graphics.rb | ![]() |
Code to Implement
Each of the renderable components has its own file in the src/main/ruby/render/assignment
directory.
Be sure to add accessors for all constructor parameters.
Equilateral Triangle
file: | src/main/ruby/drawings/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/equilateral_triangle.rb | ![]() |
Rectangle
file: | src/main/ruby/drawings/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/rectangle.rb | ![]() |
Ellipse
file: | src/main/ruby/drawings/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/ellipse.rb | ![]() |
CircularSegment
file: | src/main/ruby/drawings/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/circular_segment.rb | ![]() |
Image
file: | src/main/ruby/drawings/image.rb | ![]() |
class: | Image | |
superclass: | Object | |
methods: | initialize(path) render() |
should draw the pixels from (0,0)
file to run: | src/main/ruby/drawings/image.rb | ![]() |
Text
file: | src/main/ruby/drawings/image.rb | ![]() |
class: | Text | |
superclass: | Object | |
methods: | initialize(text, font) render() |
file to run: | src/main/ruby/drawings/text.rb | ![]() |
Point2
To support Bézier curves you will want to implement Point2 in point2.rb. You may wish to use Ruby's convenient Struct construct.
You should be able to construct a Point2 with an x and a y and be able to access those values.
Bézier Curve
file: | src/main/ruby/drawings/bezier_curve.rb | ![]() |
class: | BezierCurve | |
superclass: | Object | |
methods: | initialize(control_points) render() |
NOTE: you need not implement the interpolation yourself. Check cavalcade_of_graphics for an example of how to draw a curve.
Quadratic (Second Order) Curve: | ![]() |
![]() |
Quadratic (Third Order) Curve: | ![]() |
![]() |
Fourth Order Curve: | ![]() |
![]() |
file to run: | src/main/ruby/drawings/bezier_curve.rb | ![]() |
Testing Your Solution
Visual Comparison
file to run: | src/test/ruby/render/part_a/part_a_test_snapshots_web_page_generator.rb | ![]() |
Unit Test
file: | src/test/ruby/render/part_a/part_a_unit_test.rb | ![]() |
note: ensure that you have removed all printing to receive credit for any assignment.