Interpolation.h

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/*=============================================================================
TexGen: Geometric textile modeller.
Copyright (C) 2006 Martin Sherburn
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
=============================================================================*/
 
#pragma once
#include "SlaveNode.h"
 
namespace TexGen
{
    using namespace std;
 
 
    class CLASS_DECLSPEC CInterpolation
    {
    public:
        CInterpolation(bool bPeriodic, bool bForceInPlaneTangent, bool bForceMasterNodeTangent);
        CInterpolation(TiXmlElement &Element);
        virtual ~CInterpolation(void);
 
 
        virtual CInterpolation* Copy() const = 0;
 
        virtual string GetType() const = 0;
 
        static CObjectContainer<CInterpolation> CreateInterpolation(TiXmlElement &Element);
 
        virtual void PopulateTiXmlElement(TiXmlElement &Element, OUTPUT_TYPE OutputType) const;
 
        vector<CSlaveNode> GetSlaveNodes(const vector<CNode> &MasterNodes, int iNumPoints, bool bEquiSpaced = true) const;
 
        virtual void Initialise(const vector<CNode> &MasterNodes) const {};
 
 
        virtual CSlaveNode GetNode(const vector<CNode> &MasterNodes, int iIndex, double t) const = 0;
 
 
        CSlaveNode GetNode(const vector<CNode> &MasterNodes, double t) const;
 
    //  /// Get the length of the centreline by spliting up the interpolation function with straight lines
    //  double GetLength(vector<CNode> &MasterNodes);
 
        // Accessor methods
        void SetPeriodic(bool bPeriodic) { m_bPeriodic = bPeriodic; }
        void SetForceInPlaneTangent(bool bForceInPlaneTangent) { m_bForceInPlaneTangent = bForceInPlaneTangent; }
        bool GetPeriodic() const { return m_bPeriodic; }
        bool GetForceInPlaneTangent() const { return m_bForceInPlaneTangent; }
 
    protected:
        void CreateSlaveNodes(vector<CSlaveNode> &SlaveNodes, const vector<CNode> &MasterNodes, int iNumPoints) const;
 
        bool CreateEquiSpacedSlaveNodes(vector<CSlaveNode> &SlaveNodes, const vector<CNode> &MasterNodes, int iNumPoints) const;
 
        static void InterpolateUp(const CNode &Node1, const CNode &Node2, CSlaveNode &SlaveNode, double t);
        static void InterpolateAngle(const CNode &Node1, const CNode &Node2, CSlaveNode &SlaveNode, double t);
 
        void CalculateNodeCoordinateSystem(const vector<CNode> &MasterNodes, vector<XYZ> &Tangents) const;
 
        vector<CSlaveNode> CalcSlaveNodePositions( const vector<CNode> &MasterNodes, vector<double> &LValues, vector<double> &TValues, double dL, int iNumNodes, int iNumPoints ) const;
 
        bool m_bPeriodic;
        bool m_bForceInPlaneTangent;  // Forces both slave and master nodes to have in-plane tangents
        bool m_bForceMasterNodeTangent;  // Forces master nodes to have in-plane tangents
    };
 
};  // namespace TexGen