Method setInfluencedAlpha

libs/JSystem/J2DGraph/J2DPane.cpp:575–612

}

void J2DPane::setInfluencedAlpha(bool isInfluencedAlpha, bool check)
{
    if (check && mIsInfluencedAlpha != isInfluencedAlpha) {
        J2DPane* parent = getParentPane();
        u8 alpha        = 255;

        for (parent; parent; parent = parent->getParentPane()) {
            if (parent->mAlpha == 0) {
                alpha = 0;
                break;
            }
            alpha = (((f32)alpha) * parent->mAlpha / 255);
            if (!parent->mIsInfluencedAlpha) {
                break;
            }
        }

        if (isInfluencedAlpha) {
            if (alpha == 0) {
                setAlpha(0);
            } else {
                f32 fAlpha = ((f32)mAlpha) / alpha * 255;

                u8 alpha;
                if (fAlpha > 255) {
                    alpha = 255;
                } else {
                    alpha = fAlpha;
                }
                setAlpha(alpha);
            }
        } else {
            setAlpha((f32)(alpha * mAlpha) / 255);
        }
    }

    mIsInfluencedAlpha = isInfluencedAlpha;
}

JGeometry::TVec3f J2DPane::getGlbVtx(u8 idx) const
{