[PRMAN]Basis

RtBasis spline = {
{ -1/6.0,   0.5,  -0.5, 1/6.0},
{    0.5,    -1,   0.5,     0},
{   -0.5,     0,   0.5,     0},
{  1/6.0, 2/3.0, 1/6.0,     0}
};


RtBasis hermite = {
{  2, -2,  1,  1 },
{ -3,  3, -2, -1 },
{  0,  0,  1,  0 },
{  1,  0,  0,  0 }
};

RtBasis bezier = {
{ -1,  3, -3,  1 },
{  3, -6,  3,  0 },
{ -3,  3,  0,  0 },
{  1,  0,  0,  0 }
};



RtBasis catmullRom = {
{ -0.5,  1.5, -1.5,  0.5 },
{  1.0, -2.5,  2.0, -0.5 },
{ -0.5,  0.0,  0.5,  0.0 },
{  0.0,  1.0,  0.0,  0.0 }
};

Basis	Step
RiBezierBasis	3
RiBSplineBasis	1
RiCatmullRomBasis	1
RiHermiteBasis	2
RiPowerBasis	4