Houdini Flame ball Thrower: RBD, Cone Twist Constraint, Vellum, and pyro simulation

we set up the RBD ready for the solver; ConeTwist constraints is added to swing the arm according to its weight.

glue constraints are used to tight up the pieces together.

using vellum string and cloth with glue that break on the highest point to make the ball fly with its velocity.

adding density, burn, and velocity to the ball to make it an explosion fire ball that fly by the force of the rbd arm and vellum strings.

render in Karma XPU.