/* and a single variable (u) which is generally between 0 and 1 */
POINT_3D Bernstein(float u, POINT_3D *p) {
POINT_3D a, b, c, d, r;
a = pointTimes(pow(u,3), p[0]);
b = pointTimes(3*pow(u,2)*(1-u), p[1]);
c = pointTimes(3*u*pow((1-u),2), p[2]);
d = pointTimes(pow((1-u),3), p[3]);
r = pointAdd(pointAdd(a, b), pointAdd(c, d));
return r;
}
point widgetAbsolutePosition(const widget *self)
{
// Get our own offset
point pos = self->offset;
// Add to this our parents offset
if (self->parent != NULL)
{
pos = pointAdd(pos, widgetAbsolutePosition(self->parent));
}
return pos;
}