From eaa29e72939f5edf61735ccbb73c36ee89369f65 Mon Sep 17 00:00:00 2001
From: Amir Rajan <ar@amirrajan.net>
Date: Fri, 10 Dec 2021 00:09:48 -0600
Subject: Synced with DragonRuby Game Toolkit v3.2.

---
 .../03_sprites_as_struct/app/main.rb               | 82 ++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 samples/09_performance/03_sprites_as_struct/app/main.rb

(limited to 'samples/09_performance/03_sprites_as_struct/app/main.rb')

diff --git a/samples/09_performance/03_sprites_as_struct/app/main.rb b/samples/09_performance/03_sprites_as_struct/app/main.rb
new file mode 100644
index 0000000..7b738b7
--- /dev/null
+++ b/samples/09_performance/03_sprites_as_struct/app/main.rb
@@ -0,0 +1,82 @@
+# create a Struct variant that allows for named parameters on construction.
+class NamedStruct < Struct
+  def initialize **opts
+    super(*members.map { |k| opts[k] })
+  end
+end
+
+# create a Star NamedStruct
+Star = NamedStruct.new(:x, :y, :w, :h, :path, :s,
+                       :angle, :angle_anchor_x, :angle_anchor_y,
+                       :r, :g, :b, :a,
+                       :tile_x, :tile_y,
+                       :tile_w, :tile_h,
+                       :source_x, :source_y,
+                       :source_w, :source_h,
+                       :flip_horizontally, :flip_vertically,
+                       :blendmode_enum)
+
+# Sprites represented as Structs. They require a little bit more code than Hashes,
+# but are the a little faster to render too.
+def random_x args
+  (args.grid.w.randomize :ratio) * -1
+end
+
+def random_y args
+  (args.grid.h.randomize :ratio) * -1
+end
+
+def random_speed
+  1 + (4.randomize :ratio)
+end
+
+def new_star args
+  Star.new x: (random_x args),
+           y: (random_y args),
+           w: 4, h: 4,
+           path: 'sprites/tiny-star.png',
+           s: random_speed
+end
+
+def move_star args, star
+  star.x += star[:s]
+  star.y += star[:s]
+  if star.x > args.grid.w || star.y > args.grid.h
+    star.x = (random_x args)
+    star.y = (random_y args)
+    star[:s] = random_speed
+  end
+end
+
+def tick args
+  args.state.star_count ||= 0
+
+  # sets console command when sample app initially opens
+  if Kernel.global_tick_count == 0
+    puts ""
+    puts ""
+    puts "========================================================="
+    puts "* INFO: Sprites, Structs"
+    puts "* INFO: Please specify the number of sprites to render."
+    args.gtk.console.set_command "reset_with count: 100"
+  end
+
+  # init
+  if args.state.tick_count == 0
+    args.state.stars = args.state.star_count.map { |i| new_star args }
+  end
+
+  # update
+  args.state.stars.each { |s| move_star args, s }
+
+  # render
+  args.outputs.sprites << args.state.stars
+  args.outputs.background_color = [0, 0, 0]
+  args.outputs.primitives << args.gtk.current_framerate_primitives
+end
+
+# resets game, and assigns star count given by user
+def reset_with count: count
+  $gtk.reset
+  $gtk.args.state.star_count = count
+end
-- 
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