C++ (Cpp) SkVector::rotateCW Beispiele

Beispiel #1

Datei: GrDashingEffect.cpp Projekt: 3rdexp/soui

static void calc_dash_scaling(SkScalar* parallelScale, SkScalar* perpScale,
                            const SkMatrix& viewMatrix, const SkPoint pts[2]) {
    SkVector vecSrc = pts[1] - pts[0];
    SkScalar magSrc = vecSrc.length();
    SkScalar invSrc = magSrc ? SkScalarInvert(magSrc) : 0;
    vecSrc.scale(invSrc);

    SkVector vecSrcPerp;
    vecSrc.rotateCW(&vecSrcPerp);
    viewMatrix.mapVectors(&vecSrc, 1);
    viewMatrix.mapVectors(&vecSrcPerp, 1);

    // parallelScale tells how much to scale along the line parallel to the dash line
    // perpScale tells how much to scale in the direction perpendicular to the dash line
    *parallelScale = vecSrc.length();
    *perpScale = vecSrcPerp.length();
}

Beispiel #2

Datei: SkStrokerPriv.cpp Projekt: AshishNamdev/mozilla-central

static void SquareCapper(SkPath* path, const SkPoint& pivot,
                         const SkVector& normal, const SkPoint& stop,
                         SkPath* otherPath)
{
    SkVector parallel;
    normal.rotateCW(&parallel);

    if (otherPath)
    {
        path->setLastPt(pivot.fX + normal.fX + parallel.fX, pivot.fY + normal.fY + parallel.fY);
        path->lineTo(pivot.fX - normal.fX + parallel.fX, pivot.fY - normal.fY + parallel.fY);
    }
    else
    {
        path->lineTo(pivot.fX + normal.fX + parallel.fX, pivot.fY + normal.fY + parallel.fY);
        path->lineTo(pivot.fX - normal.fX + parallel.fX, pivot.fY - normal.fY + parallel.fY);
        path->lineTo(stop.fX, stop.fY);
    }
}