Function warp

src/testtex/testtex.cpp:290–297

inline Imath::V3f
warp (float x, float y, const Imath::M33f &xform)
{
    Imath::V3f coord (x, y, 1.0f);
    coord *= xform;
    coord[0] *= 1/(1+2*std::max (-0.5f, coord[1]));
    return coord;
}


inline Imath::V3f