lib/cyberarm_engine/lib/vector.rb in cyberarm_engine-0.10.2 vs lib/cyberarm_engine/lib/vector.rb in cyberarm_engine-0.11.0

@@ -1,7 +1,31 @@
 module CyberarmEngine
   class Vector
+    def self.up
+      Vector.new(0, 1, 0)
+    end
+
+    def self.down
+      Vector.new(0, -1, 0)
+    end
+
+    def self.left
+      Vector.new(-1, 0, 0)
+    end
+
+    def self.right
+      Vector.new(1, 0, 0)
+    end
+
+    def self.forward
+      Vector.new(0, 0, 1)
+    end
+
+    def self.backward
+      Vector.new(0, 0, -1)
+    end
+
     def initialize(x = 0, y = 0, z = 0, weight = 0)
       @x, @y, @z, @weight = x, y, z, weight
     end
 
     def x; @x; end
@@ -134,9 +158,13 @@
       Vector.new(1.0 / @x, 1.0 / @y, 1.0 / @z)
     end
 
     def sum
       @x + @y + @z
+    end
+
+    def lerp(other, factor)
+      (self - other) * factor.clamp(0.0, 1.0)
     end
 
     # 2D distance using X and Y
     def distance(other)
       Math.sqrt((@x-other.x)**2 + (@y-other.y)**2)
\ No newline at end of file