Dear Houdini - distributed points randomly and spherically
Disribute points with bias to center 


vector rand = rand(@ptnum+0.1);

@P = vector(sample_normal(rand));

Distribute points within a sphere 


vector rand = rand(@ptnum+0.1);

@P = sample_sphere_uniform(rand);

Distribute points on a sphere 


vector rand = rand(@ptnum+0.1);

@P = sample_direction_uniform(set(rand.x, rand.y));