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Working on DragonRuby Game Toolkit and RubyMotion

Amir Rajan amirrajan

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Working on DragonRuby Game Toolkit and RubyMotion
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@amirrajan
amirrajan / main.rb
Created April 24, 2026 18:37
DragonRuby Game Toolkit - Grid aligned movement
class Game
attr_dr
def initialize
@cells = 32.flat_map do |x_ordinal|
18.map do |y_ordinal|
{
**Geometry.rect(x: x_ordinal * 40, y: y_ordinal * 40, w: 40, h: 40),
x_ordinal: x_ordinal,
y_ordinal: y_ordinal,
@amirrajan
amirrajan / main.rb
Created April 23, 2026 16:04
DragonRuby Game Toolkit vs Bevy sample app
class Game
attr_dr
def initialize
@player = { x: 640 - 50,
y: 360 - 50,
w: 100,
h: 100,
path: "sprites/square/blue.png" }
@boundary_left = 300
@amirrajan
amirrajan / main.rb
Created April 19, 2026 18:17
DragonRuby Game Toolkit - Reference implementation WIP
class Camera
attr :origin,
:viewport_w,
:viewport_h,
:viewport_offset_x,
:viewport_offset_y,
:scale,
:x,
:y,
:target_scale,
@amirrajan
amirrajan / index.html
Created March 29, 2026 00:40
DragonRuby Fiddle Tutorial Format
<html>
<head>
<title>DragonRuby - Warp Drive Tutorial</title>
</head>
<body>
<h1>DragonRuby Game Toolkit - Warp Drive Tutorial</h1>
<div itemscope="itemscope" itemtype="tutorial-step" data-step-number="1">
<div itemscope="itemscope" itemtype="tutorial-text">
<h1>Traveling at Light Speed</h1>
@amirrajan
amirrajan / main.rb
Last active March 15, 2026 18:32
DragonRuby Game Toolkit - Circular Viewport/Minimap
def boot args
args.state = {}
end
def tick args
args.outputs.background_color = [30, 30, 30]
args.state.player ||= {
x: 640 - 32,
y: 360 - 32,
w: 64,
@amirrajan
amirrajan / main.rb
Created March 7, 2026 02:30
DragonRuby Game Toolkit - `Easing.smooth_stop` and `Numeric#lerp`
def boot args
args.state = {}
end
def tick args
# create 100 things and set the seed to a numeric value
# the seed will be used to create a delay for each thing when the up and down keys are pressed
args.state.things ||= 220.map do |i|
x_ordinal = i % 20
y_ordinal = i.idiv(20)
@amirrajan
amirrajan / main.rb
Last active February 14, 2026 05:14
DragonRuby Game Toolkit - Advanced Blendmodes
BLENDOPERATION_ADD = 0x1
BLENDOPERATION_SUBTRACT = 0x2
BLENDOPERATION_REV_SUBTRACT = 0x3
BLENDOPERATION_MINIMUM = 0x4
BLENDOPERATION_MAXIMUM = 0x5
BLENDFACTOR_ZERO = 0x1
BLENDFACTOR_ONE = 0x2
BLENDFACTOR_SRC_COLOR = 0x3
BLENDFACTOR_ONE_MINUS_SRC_COLOR = 0x4
BLENDFACTOR_SRC_ALPHA = 0x5
@amirrajan
amirrajan / game_metadata.txt
Created February 13, 2026 23:04
# Remove the pound sign and leading space for the properties below before publishing your game.
# devid=myname
# devtitle=My Name
# gameid=mygame
# gametitle=My Game
# version=0.1
# icon=metadata/icon.png
# === Flags available at all licensing tiers ===
@amirrajan
amirrajan / main.rb
Created February 8, 2026 23:31
DragonRuby Game Toolkit: render order demonstration
def tick args
# comment out each of these label options one at a time to see how it renders
args.outputs.labels << { x: 640,
y: Math.sin(Kernel.tick_count.to_radians).abs * 720,
r: 255, g: 0, b: 0,
text: "I will always be on top (regardless of position in the tick method)",
anchor_x: 0.5,
anchor_y: 0.5 }
# comment out each of these label options one at a time to see how it renders
@amirrajan
amirrajan / main.rb
Created February 8, 2026 23:17
DragonRuby Game Toolkit - Easing.spline
def tick args
zig_zag_spline = [
[0, 0.33, 0.66, 1],
[1, 0.66, 0.33, 0],
[0, 0.33, 0.66, 1],
[1, 0.66, 0.33, 0]
]
linear_down_spline = [
[1, 0.66, 0.33, 0]