From 1be87e5a237c2dde8fff2fa864e504d2a3360dd6 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Fri, 26 Aug 2005 00:28:48 +0000
Subject: Initial implementation

---
 vector.mod/vector.bmx | 119 ++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 110 insertions(+), 9 deletions(-)

diff --git a/vector.mod/vector.bmx b/vector.mod/vector.bmx
index c2ca8a4..264f300 100644
--- a/vector.mod/vector.bmx
+++ b/vector.mod/vector.bmx
@@ -7,29 +7,130 @@ ModuleInfo "Version: $Revision$"
 
 ' $Id$
 
-Import brl.Basic
-
 Strict
+Import brl.math
 
 Type TVector
 
-	' These are considered private
-	'
-	Field v:Float[4,4]
+	Field x:Float
+	Field y:Float
+	Field z:Float
+
 
 	' Creates a new vector
 	'	
-	' x		- X componenent
-	' y		- Y componenent
-	' z		- Z componenent
+	' dx		- X componenent
+	' dy		- Y componenent
+	' dz		- Z componenent
 	'
 	' Returns null for invalid parameters.
 	'
-	Function Create:TVector(x:Float, y:Float, z:Float)
+	Function Create:TVector(dx:Float, dy:Float, dz:Float)
 		Local o:TVector
 		
 		o=New TVector
 		
+		o.x=dx
+		o.y=dy
+		o.z=dz
+		
 		Return o
 	End Function
+	
+	' Is this vector null
+	'
+	Method IsNull:Int()
+		Return x=0 And y=0 And z=0
+	End Method
+	
+	' Get the length of the vector
+	'
+	Method Length:Float()
+		If (IsNull())
+			Return 0
+		Else
+			Return Sqr(x*x+y*y+z*z)
+		EndIf
+	End Method
+	
+	' Normalise the vector
+	'
+	Method Normalise()
+		Local l:Float=Length()
+		If (l<>0)
+			x:/l
+			y:/l
+			z:/l
+		EndIf
+	End Method
+	
+	' Add a scalar to the vector
+	'
+	Method AddScalar(sc:Float)
+		x:+sc
+		y:+sc
+		z:+sc
+	End Method
+	
+	' Flip the vector
+	'
+	Method Minus()
+		x=-x
+		y=-y
+		z=-z
+	End Method
+	
+	' Scale the vector by a scalar
+	'
+	Method Scale(sc:Float)
+		x:*sc
+		y:*sc
+		z:*sc
+	End Method
+	
+	' Add another vector to this
+	'
+	Method Add(v:TVector)
+		x:+v.x
+		y:+v.y
+		z:+v.z
+	End Method
+	
+	' Subtract another vector from this
+	'
+	Method Subtract(v:TVector)
+		x:-v.x
+		y:-v.y
+		z:-v.z
+	End Method
+
+	' Scale this with another vector
+	'
+	Method ScaleVector(v:TVector)
+		x:*v.x
+		y:*v.y
+		z:*v.z
+	End Method
+
+	' Inverse scale this with another vector
+	'
+	Method InverseScaleVector(v:TVector)
+		x:/v.x
+		y:/v.y
+		z:/v.z
+	End Method
+	
+	' Calculate the cross product of this vector with another.
+	' Returns a new vector.
+	'
+	Method Cross:TVector(v:TVector)
+		Return TVector.Create(y * v.z - v.y * z, z * v.x - v.z * x, x * v.y - v.x * y)
+	End Method
+
+	' Calculate the dot product of this vector with another.
+	'
+	Method Dot:Float(v:TVector)
+		Return x*v.x + y*v.y + z*v.z
+	End Method
+
 End Type
-- 
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