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Rem
bbdoc: noddybox.vector
EndRem
Module noddybox.vector
ModuleInfo "Framework: Simple Vector class"
ModuleInfo "Copyright: Public Domain"
ModuleInfo "Author: Ian Cowburn"
ModuleInfo "Version: $Revision$"
' $Id$
Strict
Import brl.math
Rem
bbdoc: Implements a 3D vector. Can be used as a 2D vector by ignoring Z.
EndRem
Type TVector
Rem
bbdoc: The X component of the vector.
EndRem
Field x:Float
Rem
bbdoc: The Y component of the vector.
EndRem
Field y:Float
Rem
bbdoc: The Z component of the vector.
EndRem
Field z:Float
Rem
bbdoc: Create a vector.
returns: The created vector.
about: @dx, @dy and @dz are the initial component values.
EndRem
Function Create:TVector(dx:Float=0.0, dy:Float=0.0, dz:Float=0.0)
Local o:TVector
o=New TVector
o.x=dx
o.y=dy
o.z=dz
Return o
End Function
Rem
bbdoc: Is the vector null.
returns: True if the vector is null (all components zero), False otherwise.
EndRem
Method IsNull:Int()
Return x=0 And y=0 And z=0
End Method
Rem
bbdoc: The length of the vector.
returns: The length of the vector.
EndRem
Method Length:Float()
If (IsNull())
Return 0
Else
Return Sqr(x*x+y*y+z*z)
EndIf
End Method
Rem
bbdoc: Normalise the vector so its length is 1.
EndRem
Method Normalise()
Local l:Float=Length()
If (l<>0)
x:/l
y:/l
z:/l
EndIf
End Method
Rem
bbdoc: Set the vector so its length is @sc.
EndRem
Method SetLength(sc:Float)
Normalise()
Scale(sc)
End Method
Rem
bbdoc: Adds @sc to all components.
EndRem
Method AddScalar(sc:Float)
x:+sc
y:+sc
z:+sc
End Method
Rem
bbdoc: Reverse the direction of the vector.
EndRem
Method Minus()
x=-x
y=-y
z=-z
End Method
Rem
bbdoc: Scale all components by @sc.
EndRem
Method Scale(sc:Float)
x:*sc
y:*sc
z:*sc
End Method
Rem
bbdoc: Add another vector to this vector.
EndRem
Method Add(v:TVector)
x:+v.x
y:+v.y
z:+v.z
End Method
Rem
bbdoc: Subtract another vector from this vector.
EndRem
Method Subtract(v:TVector)
x:-v.x
y:-v.y
z:-v.z
End Method
Rem
bbdoc: Scale this vector by another vector.
EndRem
Method ScaleVector(v:TVector)
x:*v.x
y:*v.y
z:*v.z
End Method
Rem
bbdoc: Inverse scale this vector by another vector.
EndRem
Method InverseScaleVector(v:TVector)
x:/v.x
y:/v.y
z:/v.z
End Method
Rem
bbdoc: Calculate the cross product of this vector with another.
returns: A new @TVector holding the cross product.
EndRem
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
Rem
bbdoc: Calculate the dot product of this vector with another.
returns: The dot product.
EndRem
Method Dot:Float(v:TVector)
Return x*v.x + y*v.y + z*v.z
End Method
End Type
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