SvgMeshPatch.cpp File Reference

#include "SvgMeshPatch.h"
#include <array>
#include <math.h>
#include <QDebug>
#include <kis_global.h>

Go to the source code of this file.

Functions
static qreal	controlrectLen (const SvgMeshPath &path)
void	deCasteljau (const std::array< QPointF, 4 > &points, qreal t, QPointF *p1, QPointF *p2, QPointF *p3, QPointF *p4, QPointF *p5)
QPointF	lerp (const QPointF &p1, const QPointF &p2, qreal t)
QPair< std::array< QPointF, 4 >, std::array< QPointF, 4 > >	splitAt (const std::array< QPointF, 4 > &points, qreal t)

Function Documentation

controlrectLen()

static qreal controlrectLen ( const SvgMeshPath & path )

static

Definition at line 418 of file SvgMeshPatch.cpp.

                                                     {
    return QLineF(path[0], path[1]).length() +
        QLineF(path[1], path[2]).length() +
        QLineF(path[2], path[3]).length();
}

deCasteljau()

void deCasteljau	(	const std::array< QPointF, 4 > &	points,
		qreal	t,
		QPointF *	p1,
		QPointF *	p2,
		QPointF *	p3,
		QPointF *	p4,
		QPointF *	p5 )

Definition at line 20 of file SvgMeshPatch.cpp.

{
    QPointF q[4];
 
    q[0] = points[0];
    q[1] = points[1];
    q[2] = points[2];
    q[3] = points[3];
 
    // points of the new segment after the split point
    QPointF p[3];
 
    // the De Casteljau algorithm
    for (unsigned short j = 1; j <= 3; ++j) {
        for (unsigned short i = 0; i <= 3 - j; ++i) {
            q[i] = (1.0 - t) * q[i] + t * q[i + 1];
        }
        p[j - 1] = q[0];
    }
 
    if (p1)
        *p1 = p[0];
    if (p2)
        *p2 = p[1];
    if (p3)
        *p3 = p[2];
    if (p4)
        *p4 = q[1];
    if (p5)
        *p5 = q[2];
}

References p, p1, p2, and p3.

lerp()

QPointF lerp ( const QPointF & p1, const QPointF & p2, qreal t )

inline

Definition at line 15 of file SvgMeshPatch.cpp.

{
    return (1 - t) * p1 + t * p2;
}

References p1, and p2.

splitAt()

QPair< std::array< QPointF, 4 >, std::array< QPointF, 4 > > splitAt	(	const std::array< QPointF, 4 > &	points,
		qreal	t )

Definition at line 54 of file SvgMeshPatch.cpp.

{
    QPointF newCP2, newCP1, splitP, splitCP1, splitCP2;
    deCasteljau(points, t, &newCP2, &splitCP1, &splitP, &splitCP2, &newCP1);
    return {{points[0], newCP2, splitCP1, splitP},
            {splitP, splitCP2, newCP1, points[3]}};
}

References deCasteljau().