working movement and animation

1 files changed, 42 insertions, 0 deletions

diff --git a/src/helper.rb b/src/helper.rb
new file mode 100644
index 0000000..b925c12
--- /dev/null
+++ b/src/helper.rb
@@ -0,0 +1,42 @@
+# different states
+# each state has a set of frames
+# each state remembers what frame it was set it
+# each frame has a rectangle for rendering, and a rectangle for a hitbox
+class Tileset
+  attr_accessor :texture
+  attr_writer :frames
+
+  def initialize(*source_rects, texture:)
+    source_rects.each do |rect|
+      self.frames.push rect
+    end
+
+    self.texture = texture
+  end
+
+  def rect
+    self.frames[self.frame.to_i]
+  end
+
+  def frame
+    @frame ||= 0
+  end
+
+  def frame=(var)
+    return @frame = 0 if frames.length.zero?
+    @frame = (var % frames.length)
+  end
+
+  def step(amount = 1)
+    self.frame += amount
+  end
+
+  def step_back(amount = 1)
+    self.frame -= amount
+  end
+
+  def frames
+    @frames ||= []
+  end
+
+end