Replaced Vertex struct with Vector class

lib/math/vector.rb

@@ -0,0 +1,52 @@
+class IMICFPS
+  class Vector
+
+    attr_accessor :x, :y, :z, :weight
+    def initialize(x = 0, y = 0, z = 0, weight = 0)
+      @x, @y, @z, @weight = x, y, z, weight
+    end
+
+    def ==(other)
+      @x      == other.x &&
+      @y      == other.y &&
+      @z      == other.z &&
+      @weight == other.weight
+    end
+
+    def +(other)
+      @x      += other.x
+      @y      += other.y
+      @z      += other.z
+      @weight += other.weight
+    end
+
+    def -(other)
+      @x      -= other.x
+      @y      -= other.y
+      @z      -= other.z
+      @weight -= other.weight
+    end
+
+    def *(other)
+      @x      *= other.x
+      @y      *= other.y
+      @z      *= other.z
+      @weight *= other.weight
+    end
+
+    def /(other)
+      @x      /= other.x
+      @y      /= other.y
+      @z      /= other.z
+      @weight /= other.weight
+    end
+
+    def to_a
+      [@x, @y, @z, @weight]
+    end
+
+    def to_s
+      "X: #{@x}, Y: #{@y}, Z: #{@z}, Weight: #{@weight}"
+    end
+  end
+end