kis_polygonal_gradient_shape_strategy.cpp File Reference

#include "kis_polygonal_gradient_shape_strategy.h"
#include "kis_debug.h"
#include "kis_algebra_2d.h"
#include <config-gsl.h>
#include <QtCore/qmath.h>
#include <limits>
#include <boost/math/distributions/normal.hpp>
#include <QPainterPath>
#include "krita_utils.h"

Go to the source code of this file.

Namespaces
namespace	Private

Functions
qreal	Private::calculateMaxWeight (const QPainterPath &selectionPath, qreal exponent, bool searchForMax)
QPointF	Private::centerFromPath (const QPainterPath &selectionPath)
bool	Private::findBestStartingPoint (int numSamples, const QPainterPath &path, qreal exponent, bool searchForMax, qreal initialExtremumValue, QPointF *result)
qreal	Private::getDisnormedGradientValue (const QPointF &pt, const QPainterPath &selectionPath, qreal exponent)
qreal	Private::initialExtremumValue (bool searchForMax)
QPainterPath	simplifyPath (const QPainterPath &path, qreal sizePortion, qreal minLinearSize, int minNumSamples)

Function Documentation

simplifyPath()

QPainterPath simplifyPath	(	const QPainterPath &	path,
		qreal	sizePortion,
		qreal	minLinearSize,
		int	minNumSamples )

Definition at line 318 of file kis_polygonal_gradient_shape_strategy.cpp.

{
    QPainterPath finalPath;
 
    QList<QPolygonF> polygons = path.toSubpathPolygons();
    Q_FOREACH (const QPolygonF poly, polygons) {
        QPainterPath p;
        p.addPolygon(poly);
 
        const qreal length = p.length();
        const qreal lengthStep =
            KritaUtils::maxDimensionPortion(poly.boundingRect(),
                                            sizePortion, minLinearSize);
 
        int numSamples = qMax(qCeil(length / lengthStep), minNumSamples);
 
        if (numSamples > poly.size()) {
            finalPath.addPolygon(poly);
            finalPath.closeSubpath();
            continue;
        }
 
        const qreal portionStep = 1.0 / numSamples;
 
        QPolygonF newPoly;
        for (qreal t = 0.0; t < 1.0; t += portionStep) {
            newPoly << p.pointAtPercent(t);
        }
 
        finalPath.addPolygon(newPoly);
        finalPath.closeSubpath();
    }
 
    return finalPath;
}

References length(), KritaUtils::maxDimensionPortion(), and p.