Removed spline interpolators

OpenBoard.pro

@@ -66,9 +66,6 @@ INCLUDEPATH += src/pdf-merger
 include(src/pdf-merger/pdfMerger.pri)
 
 #ThirdParty
-INCLUDEPATH += $$THIRD_PARTY_PATH/spline/
-INCLUDEPATH += $$THIRD_PARTY_PATH/alglib/
-include($$THIRD_PARTY_PATH/alglib/alglib.pri)
 DEPENDPATH += $$THIRD_PARTY_PATH/quazip/
 INCLUDEPATH += $$THIRD_PARTY_PATH/quazip/
 include($$THIRD_PARTY_PATH/quazip/quazip.pri)

src/domain/UBGraphicsScene.cpp

@@ -630,30 +630,6 @@ bool UBGraphicsScene::inputDeviceRelease()
             mDrawWithCompass = false;
         }
         else if (mCurrentStroke){
-            /*
-            // -------------------------------------------------------------------------
-            // Replace the stroke by a smoother one
-            // -------------------------------------------------------------------------
-            UBGraphicsStroke* smoothStroke = mCurrentStroke->smoothe();
-
-            foreach(UBGraphicsPolygonItem* poly, mCurrentStroke->polygons()){
-                mPreviousPolygonItems.removeAll(poly);
-                removeItem(poly);
-            }
-            delete mCurrentStroke;
-            mCurrentStroke = smoothStroke;
-
-            moveTo(smoothStroke->points()[0]);
-            for (int i(1); i < smoothStroke->points().size(); ++i) {
-                QPointF currentPoint = smoothStroke->points()[i];
-
-                drawLineTo(currentPoint, dc->currentToolWidth(), dc->currentToolWidth(), false);
-                moveTo(currentPoint);
-            }
-
-            // -------------------------------------------------------------------------
-            */
-
             UBGraphicsStrokesGroup* pStrokes = new UBGraphicsStrokesGroup();
 
             // Remove the strokes that were just drawn here and replace them by a stroke item

src/domain/UBGraphicsStroke.cpp

@@ -88,7 +88,7 @@ QList<QPointF> UBGraphicsStroke::addPoint(const QPointF& point, UBInterpolator::
         // We don't draw anything below the minimum distance. For performance reasons but also to make the curve
         // look smoother (e.g shaking slightly won't affect the curve).
         if (distance < MIN_DISTANCE) {
-            // we still keep track of that point to calculate the distance correctly next time around
+            // but we still keep track of that point to calculate the distance correctly next time around
             mLastReceivedPoint = point;
             return QList<QPointF>();
         }
@@ -123,59 +123,7 @@ QList<QPointF> UBGraphicsStroke::addPoint(const QPointF& point, UBInterpolator::
         return newPoints;
     }
 
-    else {
-
-        qreal MIN_INTERPOLATION_DISTANCE = 0;
-
-        QPointF lastPoint;
-        if (!mDrawnPoints.isEmpty())
-            lastPoint = mDrawnPoints.last();
-
-        QList<QPointF> newPoints;
-
-        // Interpolation
-        if (n > 3 && QLineF(lastPoint, point).length() > MIN_INTERPOLATION_DISTANCE) {
-
-            /*
-            UBSimpleSpline sp;
-            sp.setPoints(mDrawnPoints[n-2], mDrawnPoints[n-1], point);
-            */
-
-            // todo: better way of avoiding problems with equal x's (such as PCA). in the meantime this'll do.
-            qreal x0 = mDrawnPoints[n-3].x();
-            qreal x1 = mDrawnPoints[n-2].x();
-            qreal x2 = mDrawnPoints[n-1].x();
-            qreal x3 = point.x();
-            if (!(x0 == x1 || x0 == x2 || x0 == x3 || x1 == x2 || x1 == x3 || x2 == x3)) {
-
-                UBCatmullRomSpline sp;
-                sp.setPoints(QList<QPointF>() << mDrawnPoints[n-3] << mDrawnPoints[n-2] << mDrawnPoints[n-1] << point);
-
-                // get an extra 3 values in between the current point and last one
-                int n_points = 3; // number of points to interpolate
-                double interval = (point.x() - lastPoint.x())/double(n_points+1);
-
-                qDebug() << "Interpolating between: " << lastPoint << " and " << point;
-
-                for (int i(1); i <= n_points; ++i) {
-                    double x = lastPoint.x() + i*interval;
-                    QPointF newPoint(x, sp.y(x));
-                    qDebug() << newPoint;
-
-                    newPoints << newPoint;
-                    mAllPoints << newPoint;
-                    //qDebug() << "Got new point: " << newPoint;
-                }
-            }
-
-        }
-
-        newPoints << point;
-        mAllPoints << point;
-        mDrawnPoints << point;
-
-        return newPoints;
-    }
+    return QList<QPointF>();
 }
 
 bool UBGraphicsStroke::hasPressure()
@@ -220,51 +168,3 @@ void UBGraphicsStroke::clear()
         mPolygons.clear();
     }
 }
-
-
-/**
- * @brief Smoothe the curve, by interpolating extra points where needed.
- *
- * @return A new stroke based on the current one.
- */
-UBGraphicsStroke* UBGraphicsStroke::smoothe()
-{
-    // Catmull-Rom spline interpolation
-    UBCatmullRomSpline sp;
-
-    UBGraphicsStroke * smoothStroke = new UBGraphicsStroke();
-
-    smoothStroke->mAllPoints << mAllPoints[0];
-
-    for (int i(0); i < mAllPoints.size() - 3; ++i) {
-        QPointF p1, p2;
-
-        p1 = mAllPoints[i+1];
-        p2 = mAllPoints[i+2];
-
-        qreal x0 = mAllPoints[i].x();
-        qreal x1 = p1.x();
-        qreal x2 = p2.x();
-        qreal x3 = mAllPoints[i+3].x();
-
-        if (!(x0 == x1 || x0 == x2 || x0 == x3 || x1 == x2 || x1 == x3 || x2 == x3)) {
-            sp.setPoints(QList<QPointF>() << mAllPoints[i] << mAllPoints[i+1] << mAllPoints[i+2] << mAllPoints[i+3]);
-
-            smoothStroke->mAllPoints << mAllPoints[i+1];
-            int n_points = 3; // number of points to interpolate
-            double interval = (p2.x() - p1.x())/double(n_points+1);
-
-            for (int i(1); i <= n_points; ++i) {
-                double x = p1.x() + i*interval;
-                QPointF newPoint(x, sp.y(x));
-
-                smoothStroke->mAllPoints << newPoint;
-            }
-        }
-
-    }
-    smoothStroke->mAllPoints << mAllPoints[mAllPoints.size() - 2] << mAllPoints[mAllPoints.size() - 1];
-
-
-    return smoothStroke;
-}

src/domain/UBGraphicsStroke.h

@@ -59,8 +59,6 @@ class UBGraphicsStroke
 
         QList<QPointF> addPoint(const QPointF& point, UBInterpolator::InterpolationMethod interpolationMethod = UBInterpolator::NoInterpolation);
 
-        UBGraphicsStroke* smoothe();
-
         const QList<QPointF>& points() { return mAllPoints; }
 
     protected:

src/frameworks/UBInterpolator.cpp

@@ -8,92 +8,6 @@ UBInterpolator::~UBInterpolator()
 {
 }
 
-
-UBSimpleSpline::UBSimpleSpline()
-{
-
-}
-
-void UBSimpleSpline::setPoints(QList<QPointF> points)
-{
-    setPoints(points[0], points[1], points[2]);
-}
-
-void UBSimpleSpline::setPoints(QPointF p0, QPointF p1, QPointF p2)
-{
-    /*
-    p0 -= p0;
-    p1 -= p0;
-    p2 -= p0;
-    */
-    long double x0, x1, x2, y0, y1, y2;
-    x0 = p0.x();
-    x1 = p1.x();
-    x2 = p2.x();
-    y0 = p0.y();
-    y1 = p1.y();
-    y2 = p2.y();
-
-    long double k1 = (y2-y0)/(x2-x0);
-
-    m_a = (y1-y2-k1*(x1-x2))/(pow(x1,3) - pow(x2,3) - 3*x2*(pow(x1,2)-pow(x2,2)) -
-            3*(pow(x1,2) - 2*x1*x2)*(x1-x2));
-
-    m_b = -3*m_a*x2;
-    m_c = k1 - 3*m_a*pow(x1,2) - 2*m_b*x1;
-    m_d = y1 - m_a*pow(x1,3) - m_b*pow(x1,2) - m_c*x1;
-}
-
-double UBSimpleSpline::y(double x)
-{
-    return m_a*pow(x, 3) + m_b*pow(x, 2) + m_c*x + m_d;
-}
-
-UBCatmullRomSpline::UBCatmullRomSpline()
-{
-    mInterpolant = 0;
-}
-
-UBCatmullRomSpline::~UBCatmullRomSpline()
-{
-    if (mInterpolant)
-        delete mInterpolant;
-}
-
-void UBCatmullRomSpline::setPoints(QList<QPointF> points)
-{
-    // todo : basis change to avoid crashing when several X's are equal
-    mInterpolant = new alglib::spline1dinterpolant();
-
-    // alglib arrays are defined as strings
-    QString x = "[";
-    QString y = "[";
-
-    foreach(QPointF point, points) {
-        x += (QString::number(point.x()) + QString(","));
-        y += (QString::number(point.y()) + QString(","));
-    }
-
-    x.chop(1);
-    y.chop(1);
-
-    x+="]";
-    y+="]";
-
-    alglib::real_1d_array xArray = x.toLatin1().data();
-    alglib::real_1d_array yArray = y.toLatin1().data();
-
-    alglib::spline1dbuildcatmullrom(xArray, yArray, *mInterpolant);
-
-
-}
-
-double UBCatmullRomSpline::y(double x)
-{
-    return alglib::spline1dcalc(*mInterpolant, x);
-}
-
-
 UBQuadraticBezier::UBQuadraticBezier()
 {
     mPath = 0;

src/frameworks/UBInterpolator.h

@@ -3,9 +3,6 @@
 
 #include <QtGui>
 
-#include "spline.h"
-#include "interpolation.h"
-
 class UBInterpolator
 {
     /* Abstract class representing an interpolator */
@@ -13,8 +10,8 @@ class UBInterpolator
 public:
     enum InterpolationMethod {
         NoInterpolation,
-        SimpleSpline,
-        CatmullRom,
+        //SimpleSpline,
+        //CatmullRom,
         Bezier
     };
 
@@ -22,58 +19,10 @@ public:
     virtual ~UBInterpolator();
 
     virtual void setPoints(QList<QPointF> points) = 0;
-    virtual double y(double x) {}
-
-};
-
-
-class UBSimpleSpline : public UBInterpolator
-{
-    /* A basic cubic spline interpolator, that requires only three
-     * points to interpolate between the second and third one.
-     * To do so, the curvature at p2 is set to 0, so the resulting
-     * curve is not very smooth.
-     * However, it is better than linear interpolation and requires no
-     * "future" points, so it can be used seamlessly during drawing.
-    */
-
-public:
-    UBSimpleSpline();
-    virtual ~UBSimpleSpline() {}
-
-    virtual void setPoints(QList<QPointF> points);
-    void setPoints(QPointF p0, QPointF p1, QPointF p2);
-
-    virtual double y(double x);
-
-private:
-    long double m_a,
-           m_b,
-           m_c,
-           m_d;
-};
-
-
-class UBCatmullRomSpline : public UBInterpolator
-{
-    /* Catmull-Rom spline, using AlgLib as backend
-     *
-     * This requires four points to interpolate between the middle two.
-    */
-
-public:
-    UBCatmullRomSpline();
-    virtual ~UBCatmullRomSpline();
-
-    virtual void setPoints(QList<QPointF> points);
-    virtual double y(double x);
-
-private:
-    alglib::spline1dinterpolant * mInterpolant;
+    //virtual double y(double x) {}
 
 };
 
-
 class UBQuadraticBezier : public UBInterpolator
 {