1801,1811c1801,1802
<     if (!curve_inited) curve_init();
< 
<     float tt3 = t * t * 3;
<     float t2 = t * 2;
<     float m[][] = curve_basis;
< 
<     // not optimized (and probably need not be)
<     return (a * (tt3*m[0][0] + t2*m[1][0] + m[2][0]) +
<             b * (tt3*m[0][1] + t2*m[1][1] + m[2][1]) +
<             c * (tt3*m[0][2] + t2*m[1][2] + m[2][2]) +
<             d * (tt3*m[0][3] + t2*m[1][3] + m[2][3]) );
---
>     System.err.println("curveTangent not yet implemented");
>     return 0;