Houdini Vellum Tutorial- Inflatable Tube Man
In this video I show how to use Vellum simulations to create a wacky inflatable tube man with a pump duct taped to the ground. We cover how to build the geometry, how to setup and use the vellum solver and how to set up custom constraints.
VEX for spring constraints:
vector anchor = pointattrib(1, "P", 0, 0);
int point = addpoint(geoself(), anchor);
int prim = addprim(geoself(), "polyline");
int vert01 = addvertex(geoself(), prim, point);
int vert02 = addvertex(geoself(), prim, @ptnum);
VEX for pushing tape toward pump geo:
int p_prim;
vector p_puv;
float dist = xyzdist(1,@P,p_prim,p_puv);
vector P2= primuv(1,"P",p_prim,p_puv);
@P = fit(dist,chf("min_dist"),chf("max_dist"),P2,@P);