#include <KisBezierPatchParamToSourceSampler.h>

Public Types
using	Range = KisBezierUtils::Range

Public Member Functions
	KisBezierPatchParamToSourceSampler (const KisBezierPatch &_patch)

QPointF	point (const QPointF &pt) const

QPointF	point (qreal xParam, qreal yParam) const

Range	xRange (qreal xParam) const

Range	yRange (qreal yParam) const

Public Attributes
qreal	bottomLength

qreal	leftLength

KisBezierPatch	patch

qreal	rightLength

qreal	topLength

Detailed Description

A simple class that maps param-space point of a bezier patch into the source-range

Definition at line 16 of file KisBezierPatchParamToSourceSampler.h.

Member Typedef Documentation

◆ Range

using KisBezierPatchParamToSourceSampler::Range = KisBezierUtils::Range

Definition at line 18 of file KisBezierPatchParamToSourceSampler.h.

Constructor & Destructor Documentation

◆ KisBezierPatchParamToSourceSampler()

KisBezierPatchParamToSourceSampler::KisBezierPatchParamToSourceSampler ( const KisBezierPatch & _patch )

inline

Definition at line 20 of file KisBezierPatchParamToSourceSampler.h.

        : patch(_patch)
        , topLength(KisBezierUtils::curveLength(patch.points[KisBezierPatch::TL], patch.points[KisBezierPatch::TL_HC], patch.points[KisBezierPatch::TR_HC], patch.points[KisBezierPatch::TR], 0.01))
        , bottomLength(KisBezierUtils::curveLength(patch.points[KisBezierPatch::BL], patch.points[KisBezierPatch::BL_HC], patch.points[KisBezierPatch::BR_HC], patch.points[KisBezierPatch::BR], 0.01))
        , leftLength(KisBezierUtils::curveLength(patch.points[KisBezierPatch::TL], patch.points[KisBezierPatch::TL_VC], patch.points[KisBezierPatch::BL_VC], patch.points[KisBezierPatch::BL], 0.01))
        , rightLength(KisBezierUtils::curveLength(patch.points[KisBezierPatch::TR], patch.points[KisBezierPatch::TR_VC], patch.points[KisBezierPatch::BR_VC], patch.points[KisBezierPatch::BR], 0.01))
    {}

Member Function Documentation

◆ point() [1/2]

QPointF KisBezierPatchParamToSourceSampler::point ( const QPointF & pt ) const

inline

Definition at line 77 of file KisBezierPatchParamToSourceSampler.h.

                                           {
        return point(pt.x(), pt.y());
    }

References point().

◆ point() [2/2]

QPointF KisBezierPatchParamToSourceSampler::point	(	qreal	xParam,
		qreal	yParam ) const

inline

Definition at line 66 of file KisBezierPatchParamToSourceSampler.h.

    {
        using KisAlgebra2D::lerp;
 
        const Range xRange = this->xRange(xParam);
        const Range yRange = this->yRange(yParam);
 
        return QPointF(lerp(xRange.start, xRange.end, yParam),
                       lerp(yRange.start, yRange.end, xParam));
    }

References KisBezierUtils::Range::end, KisAlgebra2D::lerp(), lerp(), KisBezierUtils::Range::start, xRange(), and yRange().

◆ xRange()

Range KisBezierPatchParamToSourceSampler::xRange ( qreal xParam ) const

inline

Definition at line 36 of file KisBezierPatchParamToSourceSampler.h.

    {
        qreal xCoord1 = KisBezierUtils::curveLengthAtPoint(patch.points[KisBezierPatch::TL], patch.points[KisBezierPatch::TL_HC], patch.points[KisBezierPatch::TR_HC], patch.points[KisBezierPatch::TR], xParam, 0.01) / topLength;
        qreal xCoord2 = KisBezierUtils::curveLengthAtPoint(patch.points[KisBezierPatch::BL], patch.points[KisBezierPatch::BL_HC], patch.points[KisBezierPatch::BR_HC], patch.points[KisBezierPatch::BR], xParam, 0.01) / bottomLength;
 
        xCoord1 = patch.originalRect.left() + xCoord1 * patch.originalRect.width();
        xCoord2 = patch.originalRect.left() + xCoord2 * patch.originalRect.width();
 
        if (xCoord1 > xCoord2) {
            std::swap(xCoord1, xCoord2);
        }
 
        return {xCoord1, xCoord2};
    };

References KisBezierPatch::BL, KisBezierPatch::BL_HC, bottomLength, KisBezierPatch::BR, KisBezierPatch::BR_HC, KisBezierUtils::curveLengthAtPoint(), KisBezierPatch::originalRect, patch, KisBezierPatch::points, KisBezierPatch::TL, KisBezierPatch::TL_HC, topLength, KisBezierPatch::TR, and KisBezierPatch::TR_HC.

◆ yRange()

Range KisBezierPatchParamToSourceSampler::yRange ( qreal yParam ) const

inline

Definition at line 51 of file KisBezierPatchParamToSourceSampler.h.

    {
        qreal yCoord1 = KisBezierUtils::curveLengthAtPoint(patch.points[KisBezierPatch::TL], patch.points[KisBezierPatch::TL_VC], patch.points[KisBezierPatch::BL_VC], patch.points[KisBezierPatch::BL], yParam, 0.01) / leftLength;
        qreal yCoord2 = KisBezierUtils::curveLengthAtPoint(patch.points[KisBezierPatch::TR], patch.points[KisBezierPatch::TR_VC], patch.points[KisBezierPatch::BR_VC], patch.points[KisBezierPatch::BR], yParam, 0.01) / rightLength;
 
        yCoord1 = patch.originalRect.top() + yCoord1 * patch.originalRect.height();
        yCoord2 = patch.originalRect.top() + yCoord2 * patch.originalRect.height();
 
        if (yCoord1 > yCoord2) {
            std::swap(yCoord1, yCoord2);
        }
 
        return {yCoord1, yCoord2};
    };