Blending method

A computer-implemented method for generating a blend surface for a model of a component comprising a first surface S0 and a second surface S1 adjacent to the first surface S0, the method comprising:

• determining a first curve C in three-dimensional space, wherein, for each point on the first curve C, a distance of the respective point from the first surface S0 and a distance of the respective point from the second surface S1 is within a threshold of a pre-determined parameter r;
• determining a second curve B0, the second curve B0 comprising a projection of the first curve C onto the first surface S0;
• determining a third curve B1, the third curve B1 comprising a projection of the first curve C onto the second surface S1;
• generating a first field function ƒ(x) based on the first curve C, the second curve B0, and the third curve B1, wherein the first field function ƒ(x) comprises a signed distance from a point in the three-dimensional space to a blend surface S between the first surface S0 and the second surface S1;
• and
• generating the blend surface S based on the first field function ƒ(x).