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<html>
<head>
<title>DragonRuby Game Toolkit - Primitives</title>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/10.0.3/styles/default.min.css" />
<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/10.0.3/highlight.min.js"></script>
<script src="tutorial.js"></script>
<link rel="stylesheet" href="tutorial.css" />
</head>
<body>
<h1>DragonRuby Game Toolkit - Primitives</h1>
<div itemscope="itemscope" itemtype="tutorial-step" data-step-number="1">
<div itemscope="itemscope" itemtype="tutorial-text">
<h1>Lines</h1>
DragonRuby has several primitive structures used to render.
One of these primitives is lines.
</div>
<div itemscope="itemscope" itemtype="tutorial-code">
<pre>
<code class="language-ruby" itemprop="text">
# entry point to game
def tick args
# Some simple lines
# X Y X2 Y2
args.outputs.lines << [ 0, 0, 50, 50]
args.outputs.lines << [50, 80, 80, 40]
# Colorful blue line
args.outputs.lines << [
20, # X
40, # Y
70, # X2
90, # Y2
35, # R
72, # G
254 # B
]
# [x, y, x2, y2, [r, g, b]] also works
# Can be used to alias RGB values
args.outputs.lines << [
30, # X
70, # Y
60, # X2
60, # Y2
lavender # RGB
]
# The alpha parameter affects transparency
# 255 is the max alpha and is fully opaque
# [x, y, x2, y2, r, g, b, a] or
# [x, y, x2, y2, [r, g, b, a]]
args.outputs.lines << [
20, 20, 140, 20, # X Y X2 Y2
28, 178, 54, # R G B
args.state.tick_count % 255 # A
]
end
def lavender
# R G B
[171, 127, 251]
end
# reset the game on save
$gtk.reset
</code>
</pre>
</div>
</div>
<div itemscope="itemscope" itemtype="tutorial-step" data-step-number="2">
<div itemscope="itemscope" itemtype="tutorial-text">
<h1>Borders</h1>
Borders is a primitive that draws the lines to a rectangle.
</div>
<div itemscope="itemscope" itemtype="tutorial-code">
<pre>
<code class="language-ruby" itemprop="text">
def tick args
# A simple border
# X Y W H
args.outputs.borders << [20, 20, 70, 50]
# A colorful border
args.outputs.borders << [
60, # X
30, # Y
70, # W
50, # H
lavender # RGB
]
# A colorful fading border
args.outputs.borders << [
50, # X
10, # Y
50, # W
40, # H
fading_crimson(args) # RGBA
]
end
def lavender
[171, 127, 251]
end
def fading_crimson args
# R G B
[175, 40, 91,
# Alpha descending from 255
255 - args.state.tick_count % 255]
end
$gtk.reset
</code>
</pre>
</div>
</div>
<div itemscope="itemscope" itemtype="tutorial-step" data-step-number="3">
<div itemscope="itemscope" itemtype="tutorial-text">
<h1>Solids</h1>
Solids are borders that are filled in.
</div>
<div itemscope="itemscope" itemtype="tutorial-code">
<pre>
<code class="language-ruby" itemprop="text">
def tick args
# A simple solid
# X Y W H
args.outputs.solids << [20, 20, 70, 50]
# A colorful solid
args.outputs.solids << [
60, # X
30, # Y
70, # W
50, # H
lavender # RGB
]
# A colorful fading solid
args.outputs.solids << [
50, # X
10, # Y
50, # W
40, # H
fading_crimson(args) # RGBA
]
end
def lavender
[171, 127, 251]
end
def fading_crimson args
[175, 40, 91,
255 - args.state.tick_count % 255]
end
$gtk.reset
</code>
</pre>
</div>
</div>
<div itemscope="itemscope" itemtype="tutorial-step" data-step-number="4">
<div itemscope="itemscope" itemtype="tutorial-text">
<h1>Labels</h1>
Labels are a primitive that show text.
</div>
<div itemscope="itemscope" itemtype="tutorial-code">
<pre>
<code class="language-ruby" itemprop="text">
def tick args
# A simple label
# X Y TEXT
args.outputs.labels << [5, 85, 'Simple']
# A small label
# X Y TEXT SIZE
args.outputs.labels << [5, 65, 'Small', -7]
# A big label
# X Y TEXT SIZE
args.outputs.labels << [5, 55, 'Big', 7]
# A left-aligned label
args.outputs.labels << [
args.grid.left.shift_right(5), # X
args.grid.bottom.shift_up(10), # Y
'Left', # TEXT
-6, # SIZE
0 # ALIGN
]
# A center-aligned label
args.outputs.labels << [
args.grid.center.x, # X
args.grid.bottom.shift_up(10), # Y
'Center', # TEXT
-6, # SIZE
1 # ALIGN
]
# A right-aligned label
args.outputs.labels << [
args.grid.right.shift_left(5), # X
args.grid.bottom.shift_up(10), # Y
'Right', # TEXT
-6, # SIZE
2 # ALIGN
]
# A colorful label
args.outputs.labels << [
args.grid.center.x.shift_right(10), # X
args.grid.center.y.shift_up(10), # Y
'Color', # TEXT
-3, # SIZE
0, # ALIGN
lavender # RGB
]
# A fading label
args.outputs.labels << [
args.grid.center.x.shift_right(10), # X
args.grid.center.y.shift_down(10), # Y
'Fade', # TEXT
-3, # SIZE
0, # ALIGN
fading_crimson(args) # RGBA
]
end
def lavender
[171, 127, 251]
end
def fading_crimson args
[175, 40, 91,
255 - args.state.tick_count % 255]
end
$gtk.reset
</code>
</pre>
</div>
</div>
<div itemscope="itemscope" itemtype="tutorial-step" data-step-number="5">
<div itemscope="itemscope" itemtype="tutorial-text">
<h1>Sprites</h1>
Sprites are used for images and complex shapes.
</div>
<div itemscope="itemscope" itemtype="tutorial-code">
<pre>
<code class="language-ruby" itemprop="text">
def tick args
# A simple sprite
args.outputs.sprites << [
10, # X
25, # Y
40, # W
40, # H
'sprites/isometric-violet.png' # PATH
]
# A rotating sprite
args.outputs.sprites << [
60, # X
25, # Y
40, # W
40, # H
'sprites/circle-blue.png', # PATH
args.state.tick_count # ANGLE
]
# A fading sprite
args.outputs.sprites << [
110, # X
25, # Y
40, # W
40, # H
'sprites/hexagon-orange.png', # PATH
0, # ANGLE
255 - args.state.tick_count % 255 # ALPHA
]
end
$gtk.reset
</code>
</pre>
</div>
</div>
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</body>
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