D:/VL/BuildSystem/VL_DISTRO/Visualization_Library_SDK/src/vlCore/LinearInterpolator.hpp

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#ifndef LinearInterpolator_INCLUDE_ONCE
#define LinearInterpolator_INCLUDE_ONCE

#include <vlCore/Interpolator.hpp>

namespace vl
{
  template<typename T>
  class LinearInterpolator: public Object
  {
  public:
    virtual const char* className() { return "vl::LinearInterpolator"; }

    LinearInterpolator() 
    {
      VL_DEBUG_SET_OBJECT_NAME()
    }

    LinearInterpolator(const std::vector<T>& path): mPath(path) {}

    T computePoint(float t) const
    {
      t = vl::clamp(t,0.0f,1.0f);
      if (t == 0.0f)
        return mPath[0];
      if (t == 1.0f)
        return mPath.back();
      int p0 = int((mPath.size()-1)*t);
      int p1 = p0+1;
      if (p1 > (int)mPath.size()-1)
        p1 = (int)mPath.size()-1;
      float tt = (mPath.size()-1)*t - p0/*int((mPath.size()-1)*t)*/;
      return mPath[p0]*(1.0f-tt) + mPath[p1]*tt;
    }

    void setPath(const std::vector<T>& path) { mPath = path; }
    const std::vector<T>& path() const { return mPath; }
    std::vector<T>& path() { return mPath; }

  protected:
    std::vector<T> mPath;
    std::vector<T> mLinearSpline;
  };

  typedef LinearInterpolator<float>     LinearInterpolatorFloat_T;
  typedef LinearInterpolator<vl::fvec2> LinearInterpolatorFVec2_T;
  typedef LinearInterpolator<vl::fvec3> LinearInterpolatorFVec3_T;
  typedef LinearInterpolator<vl::fvec4> LinearInterpolatorFVec4_T;
  typedef LinearInterpolator<double>    LinearInterpolatorDouble_T;
  typedef LinearInterpolator<vl::dvec2> LinearInterpolatorDVec2_T;
  typedef LinearInterpolator<vl::dvec3> LinearInterpolatorDVec3_T;
  typedef LinearInterpolator<vl::dvec4> LinearInterpolatorDVec4_T;

  class LinearInterpolatorFVec4: public vl::InterpolatorFVec4
  {
  public:
    LinearInterpolatorFVec4(): mInterpolator( new LinearInterpolatorFVec4_T ) {}
    LinearInterpolatorFVec4(const std::vector<vl::fvec4>& path): mInterpolator( new LinearInterpolatorFVec4_T(path) ) {}
    vl::fvec4 computePoint(float t) const { return interpolator()->computePoint(t); }
    LinearInterpolatorFVec4_T* interpolator() { return mInterpolator.get(); }
    const LinearInterpolatorFVec4_T* interpolator() const { return mInterpolator.get(); }
    void setInterpolator(LinearInterpolatorFVec4_T* interpolator) { mInterpolator = interpolator; }
  protected:
    vl::ref<LinearInterpolatorFVec4_T> mInterpolator;
  };
  class LinearInterpolatorFVec3: public vl::InterpolatorFVec3
  {
  public:
    LinearInterpolatorFVec3(): mInterpolator( new LinearInterpolatorFVec3_T ) {}
    LinearInterpolatorFVec3(const std::vector<vl::fvec3>& path): mInterpolator( new LinearInterpolatorFVec3_T(path) ) {}
    vl::fvec3 computePoint(float t) const { return interpolator()->computePoint(t); }
    LinearInterpolatorFVec3_T* interpolator() { return mInterpolator.get(); }
    const LinearInterpolatorFVec3_T* interpolator() const { return mInterpolator.get(); }
    void setInterpolator(LinearInterpolatorFVec3_T* interpolator) { mInterpolator = interpolator; }
  protected:
    vl::ref<LinearInterpolatorFVec3_T> mInterpolator;
  };
  class LinearInterpolatorFVec2: public vl::InterpolatorFVec2
  {
  public:
    LinearInterpolatorFVec2(): mInterpolator( new LinearInterpolatorFVec2_T ) {}
    LinearInterpolatorFVec2(const std::vector<vl::fvec2>& path): mInterpolator( new LinearInterpolatorFVec2_T(path) ) {}
    vl::fvec2 computePoint(float t) const { return interpolator()->computePoint(t); }
    LinearInterpolatorFVec2_T* interpolator() { return mInterpolator.get(); }
    const LinearInterpolatorFVec2_T* interpolator() const { return mInterpolator.get(); }
    void setInterpolator(LinearInterpolatorFVec2_T* interpolator) { mInterpolator = interpolator; }
  protected:
    vl::ref<LinearInterpolatorFVec2_T> mInterpolator;
  };
  class LinearInterpolatorFloat: public vl::InterpolatorFloat
  {
  public:
    LinearInterpolatorFloat(): mInterpolator( new LinearInterpolatorFloat_T ) {}
    LinearInterpolatorFloat(const std::vector<float>& path): mInterpolator( new LinearInterpolatorFloat_T(path) ) {}
    float computePoint(float t) const { return interpolator()->computePoint(t); }
    LinearInterpolatorFloat_T* interpolator() { return mInterpolator.get(); }
    const LinearInterpolatorFloat_T* interpolator() const { return mInterpolator.get(); }
    void setInterpolator(LinearInterpolatorFloat_T* interpolator) { mInterpolator = interpolator; }
  protected:
    vl::ref<LinearInterpolatorFloat_T> mInterpolator;
  };
  class LinearInterpolatorDVec4: public vl::InterpolatorDVec4
  {
  public:
    LinearInterpolatorDVec4(): mInterpolator( new LinearInterpolatorDVec4_T ) {}
    LinearInterpolatorDVec4(const std::vector<vl::dvec4>& path): mInterpolator( new LinearInterpolatorDVec4_T(path) ) {}
    vl::dvec4 computePoint(float t) const { return interpolator()->computePoint(t); }
    LinearInterpolatorDVec4_T* interpolator() { return mInterpolator.get(); }
    const LinearInterpolatorDVec4_T* interpolator() const { return mInterpolator.get(); }
    void setInterpolator(LinearInterpolatorDVec4_T* interpolator) { mInterpolator = interpolator; }
  protected:
    vl::ref<LinearInterpolatorDVec4_T> mInterpolator;
  };
  class LinearInterpolatorDVec3: public vl::InterpolatorDVec3
  {
  public:
    LinearInterpolatorDVec3(): mInterpolator( new LinearInterpolatorDVec3_T ) {}
    LinearInterpolatorDVec3(const std::vector<vl::dvec3>& path): mInterpolator( new LinearInterpolatorDVec3_T(path) ) {}
    vl::dvec3 computePoint(float t) const { return interpolator()->computePoint(t); }
    LinearInterpolatorDVec3_T* interpolator() { return mInterpolator.get(); }
    const LinearInterpolatorDVec3_T* interpolator() const { return mInterpolator.get(); }
    void setInterpolator(LinearInterpolatorDVec3_T* interpolator) { mInterpolator = interpolator; }
  protected:
    vl::ref<LinearInterpolatorDVec3_T> mInterpolator;
  };
  class LinearInterpolatorDVec2: public vl::InterpolatorDVec2
  {
  public:
    LinearInterpolatorDVec2(): mInterpolator( new LinearInterpolatorDVec2_T ) {}
    LinearInterpolatorDVec2(const std::vector<vl::dvec2>& path): mInterpolator( new LinearInterpolatorDVec2_T(path) ) {}
    vl::dvec2 computePoint(float t) const { return interpolator()->computePoint(t); }
    LinearInterpolatorDVec2_T* interpolator() { return mInterpolator.get(); }
    const LinearInterpolatorDVec2_T* interpolator() const { return mInterpolator.get(); }
    void setInterpolator(LinearInterpolatorDVec2_T* interpolator) { mInterpolator = interpolator; }
  protected:
    vl::ref<LinearInterpolatorDVec2_T> mInterpolator;
  };
  class LinearInterpolatorDouble: public vl::InterpolatorDouble
  {
  public:
    LinearInterpolatorDouble(): mInterpolator( new LinearInterpolatorDouble_T ) {}
    LinearInterpolatorDouble(const std::vector<double>& path): mInterpolator( new LinearInterpolatorDouble_T(path) ) {}
    double computePoint(float t) const { return interpolator()->computePoint(t); }
    LinearInterpolatorDouble_T* interpolator() { return mInterpolator.get(); }
    const LinearInterpolatorDouble_T* interpolator() const { return mInterpolator.get(); }
    void setInterpolator(LinearInterpolatorDouble_T* interpolator) { mInterpolator = interpolator; }
  protected:
    vl::ref<LinearInterpolatorDouble_T> mInterpolator;
  };
}

#endif