Difference between revisions of "VectorA:cross"

Revision as of 14:02, 23 February 2013

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

@@ Line 39: / Line 39: @@
 [[Category:API_Functions]]
-Returns a vector of the cross product of two vectors
-More information on cross products can be found at [http://en.wikipedia.org/wiki/Cross_product]
-Code representation:
- 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
-Code example:
- 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)