1 files changed, 133 insertions, 0 deletions
diff --git a/adapt_triangle.rb b/adapt_triangle.rb
new file mode 100644
index 0000000..e091ec1
--- /dev/null
+++ b/adapt_triangle.rb
@@ -0,0 +1,133 @@
+# frozen_string_literal: true
+
+module AdaptTriangle
+
+  def _translate_x(x)
+    @x1 += x
+    @x2 += x
+    @x3 += x
+  end
+
+  def _translate_y(y)
+    @y1 += y
+    @y2 += y
+    @y3 += y
+  end
+
+  def _rotate(angle)
+    @x1 = ((@x1) * Math.cos(angle)) - ((@y1) * Math.sin(angle))
+    @y1 = ((@x1) * Math.sin(angle)) + ((@y1) * Math.cos(angle))
+    @x2 = ((@x2) * Math.cos(angle)) - ((@y2) * Math.sin(angle))
+    @y2 = ((@x2) * Math.sin(angle)) + ((@y2) * Math.cos(angle))
+    @x3 = ((@x3) * Math.cos(angle)) - ((@y3) * Math.sin(angle))
+    @y3 = ((@x3) * Math.sin(angle)) + ((@y3) * Math.cos(angle))
+  end
+
+  def _update
+    angle = Camera.angle * (Math::PI / 180)
+    @x1 = ((x + x1 + Camera.x) * Math.cos(angle)) - ((y + y1 + Camera.y) * Math.sin(angle))
+    @y1 = ((x + x1 + Camera.x) * Math.sin(angle)) + ((y + y1 + Camera.y) * Math.cos(angle))
+    @x2 = ((x + x2 + Camera.x) * Math.cos(angle)) - ((y + y2 + Camera.y) * Math.sin(angle))
+    @y2 = ((x + x2 + Camera.x) * Math.sin(angle)) + ((y + y2 + Camera.y) * Math.cos(angle))
+    @x3 = ((x + x3 + Camera.x) * Math.cos(angle)) - ((y + y3 + Camera.y) * Math.sin(angle))
+    @y3 = ((x + x3 + Camera.x) * Math.sin(angle)) + ((y + y3 + Camera.y) * Math.cos(angle))
+  end
+
+  def _x1
+    @x1
+  end
+
+  def _y1
+    @y1
+  end
+
+  def x
+    @x ||= x1
+  end
+
+  def x=(x)
+    #diff = x - self.x
+    #self.x1 += diff
+    #self.x2 += diff
+    #self.x3 += diff
+    @x = x
+    _update
+  end
+
+  def y
+    @y ||= y1
+  end
+
+  def y=(y)
+    #diff = y - self.y
+    #self.y1 += diff
+    #self.y2 += diff
+    #self.y3 += diff
+    @y = y
+  end
+
+  #undo rotation
+  def x1
+    @virtual_x1 ||= @x1
+    #(@x1 * Math.cos(-Camera.angle)) - (@y1 * Math.sin(-Camera.angle)) - Camera.x
+  end
+
+  #difference between 'x1' and undone rotation > then rotated
+  def x1=(x1)
+    @virtual_x1 = x1
+    _update
+    #temp = self.x1
+    #@x1 += ((x1 - temp) * Math.cos(Camera.angle))
+    #@y1 += ((x1 - temp) * Math.sin(Camera.angle))
+  end
+
+  def y1
+    @virtual_y1 ||= @y1
+    #(@x1 * Math.sin(-Camera.angle)) + (@y1 * Math.cos(-Camera.angle)) - Camera.y
+  end
+
+  def y1=(y1)
+    @virtual_y1 = y1
+    _update
+    #temp = self.y1
+    #@x1 += -((y1 - temp) * Math.sin(Camera.angle))
+    #@y1 += ((y1 - temp) * Math.cos(Camera.angle))
+  end
+
+  def x2
+    @virtual_x2 ||= @x2
+  end
+
+  def x2=(x2)
+    @virtual_x2 = x2
+    _update
+  end
+
+  def y2
+    @virtual_y2 ||= @y2
+  end
+
+  def y2=(y2)
+    @virtual_y2 = y2
+    _update
+  end
+
+  def x3
+    @virtual_x3 ||= @x3
+  end
+
+  def x3=(x3)
+    @virtual_x3 = x3
+    _update
+  end
+
+  def y3
+    @virtual_y3 ||= @y3
+  end
+
+  def y3=(y3)
+    @virtual_y3 = y3
+    _update
+  end
+end
+