kis_tool_multihand_helper.cpp File Reference

#include "kis_tool_multihand_helper.h"
#include <QTransform>
#include "kis_painter.h"
#include <strokes/KisFreehandStrokeInfo.h>
#include "kis_algebra_2d.h"

Go to the source code of this file.

Classes
struct	KisToolMultihandHelper::Private

Functions
void	adjustPointInformationRotation (KisPaintInformation &pi, const QTransform &t)

Function Documentation

adjustPointInformationRotation()

void adjustPointInformationRotation	(	KisPaintInformation &	pi,
		const QTransform &	t )

Definition at line 54 of file kis_tool_multihand_helper.cpp.

{
    KisAlgebra2D::DecomposedMatrix d(t);
 
    qreal rotation = d.angle;
    const bool mirrorX = KisAlgebra2D::signPZ(d.scaleX) < 0;
    const bool mirrorY = KisAlgebra2D::signPZ(d.scaleY) < 0;
 
    pi.setCanvasMirroredH(pi.canvasMirroredH() ^ mirrorX);
    pi.setCanvasMirroredV(pi.canvasMirroredV() ^ mirrorY);
 
    if (pi.canvasMirroredH()!= pi.canvasMirroredV()) {
        rotation = normalizeAngleDegrees(360.0 - rotation);
    }
 
    pi.setCanvasRotation(normalizeAngleDegrees(pi.canvasRotation() - rotation));
}

References KisPaintInformation::canvasMirroredH(), KisPaintInformation::canvasMirroredV(), KisPaintInformation::canvasRotation(), normalizeAngleDegrees(), KisPaintInformation::setCanvasMirroredH(), KisPaintInformation::setCanvasMirroredV(), KisPaintInformation::setCanvasRotation(), and KisAlgebra2D::signPZ().