Difference between revisions of "VectorA:cross"

Latest revision as of 13:20, 18 July 2013

Function vector:cross
Returns the vector which resulted in the cross product of the two vectors.
Syntax	vector:cross(vector vect)
Returns	number
Part of	ComputerCraft
API	vector

Example
Creates a cross product of two vectors and prints the resulting vector.
Code	local a = vector.new(1, 2, 3) local b = vector.new(4, 5, 6) local c = a:cross(b) print(c.x) print(c.y) print(c.z) --(-3) --6 --(-3)

Example
Code to recreate the function. Gives insight into what the function does.
Code	local a = vector.new(1, 2, 3) local b = vector.new(2, 1, 2) local c = vector.new( (a.y * b.z - a.z * b.y), (a.z * b.x - z.x * b.z), (a.x * b.y - a.y * b.x)) --c.x = 1 --c.y = 4 --c.z = -3

It is important to note that a:cross(b) will not usually equal b:cross(a).

More information about cross products can be found at [1]

@@ Line 1: / Line 1: @@
-Returns the cross product of two vectors
+{{lowercase}}
+{{Function
+|name=vector:cross
+|args=[[vector (API)|vector]] vect
+|returns={{type|number}}
+|api=vector
+|addon=ComputerCraft
+|desc=Returns the vector which resulted in the cross product of the two vectors.
+|examples=
+{{Example
+|desc=Creates a cross product of two vectors and prints the resulting vector.
+|code=local a = vector.new(1, 2, 3)
+ local b = vector.new(4, 5, 6)
+ local c = a:cross(b)
+ print(c.x)
+ print(c.y)
+ print(c.z)
+ --(-3)
+ --6
+ --(-3)
+}}
+{{Example
+|desc=Code to recreate the function. Gives insight into what the function does.
+|code=local a = vector.new(1, 2, 3)
+ local b = vector.new(2, 1, 2)
+ local c = vector.new(
+  (a.y * b.z - a.z * b.y),
+  (a.z * b.x - z.x * b.z),
+  (a.x * b.y - a.y * b.x))
+ --c.x = 1
+ --c.y = 4
+ --c.z = -3
+}}
+}}
+It is important to note that a:cross(b) will not usually equal b:cross(a).
+More information about cross products can be found at [http://en.wikipedia.org/wiki/Cross_product]
+[[Category:API_Functions]]