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Comparing magicsld/Outils_Math.vb (file contents):
Revision 129 by bournival, Mon Aug 20 21:30:28 2007 UTC vs.
Revision 130 by bournival, Wed Jul 30 21:26:03 2008 UTC

#	Line 1 | Line 1
1	+	Imports System.Math
2	+
3		Module Outils_Math
4
5
#	Line 778 | Line 780 | Module Outils_Math
780
781		End Sub
782
783	+
784	+	''' <summary>
785	+	''' Retourne l'angle entre 2 vecteurs
786	+	''' </summary>
787	+	''' <param name="u">Le premier vecteur</param>
788	+	''' <param name="v">Le second vecteur</param>
789	+	''' <returns>Un angle en radian</returns>
790	+	''' <remarks>Retourne Pi si les 2 vecteurs sont d'orientation identique mais de direction opposés</remarks>
791		Public Function Angle2Vecteurs(ByRef u() As Double, ByRef v() As Double) As Double
792		Dim temp As Double
793		temp = Outils_Math.Prod_scalaire(u, v) / norme(u) / norme(v)
#	Line 788 | Line 798 | Module Outils_Math
798		End If
799		End Function
800
801	+
802	+	''' <summary>
803	+	''' Compare 2 vecteur de dimension 3
804	+	''' </summary>
805	+	''' <param name="u">Premier Vecteur</param>
806	+	''' <param name="v">Second vecteur</param>
807	+	''' <returns>0 si sans rapport, 1 si identiques, 2 si sens inverse, 3 si même sens mais norme différente, 4 si norme et sens différent</returns>
808	+	''' <remarks>Non optimisé pour les vecteurs unitaires</remarks>
809	+	Public Function ComparerVecteurs3D(ByRef u() As Double, ByRef v() As Double) As Byte
810	+
811	+	If u.GetUpperBound(0) <> 2 AndAlso v.GetUpperBound(0) <> 2 Then Return 0
812	+	If Math.Abs(u(0) - v(0)) < 0.0005 AndAlso Math.Abs(u(1) - v(1)) < 0.0005 AndAlso Math.Abs(u(1) - v(1)) < 0.0005 Then Return 1
813	+	If Math.Abs(u(0) + v(0)) < 0.0005 AndAlso Math.Abs(u(1) + v(1)) < 0.0005 AndAlso Math.Abs(u(1) + v(1)) < 0.0005 Then Return 2
814	+
815	+	Dim u2() As Double = unitaire(u)
816	+	Dim v2() As Double = unitaire(v)
817	+
818	+	If Math.Abs(u2(0) - v2(0)) < 0.0005 AndAlso Math.Abs(u2(1) - v2(1)) < 0.0005 AndAlso Math.Abs(u2(1) - v2(1)) < 0.0005 Then Return 3
819	+	If Math.Abs(u2(0) + v2(0)) < 0.0005 AndAlso Math.Abs(u2(1) + v2(1)) < 0.0005 AndAlso Math.Abs(u2(1) + v2(1)) < 0.0005 Then Return 4
820	+
821	+	Return 0
822	+
823	+	End Function
824	+
825	+	''' <summary>
826	+	''' Fonction qui inverse le sens d'un vecteur
827	+	''' </summary>
828	+	''' <param name="u">Le vecteur</param>
829	+	''' <returns>Un vecteur de direction inverse</returns>
830	+	''' <remarks></remarks>
831	+	Public Function InverserVecteur(ByRef u() As Double) As Double()
832	+	Dim v() As Double
833	+	ReDim v(u.GetUpperBound(0))
834	+
835	+	For i As Integer = 0 To u.GetUpperBound(0)
836	+	v(i) = -u(i)
837	+	Next
838	+	Return v
839	+	End Function
840	+
841	+
842	+
843		End Module

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