i'm using h9. learning how to make a fractured obj. i attached the hip file.

problem 1 : before the box hit the floor the surface (as a result of the extrude node) is not smooth, it looks segmented. how to fix this?

problem 2 : after it hit the floor, the pieces of the box are intersect each other, even after i increase the division in the collision tab. how to make the simulation to be more accurate.

anyone can help ?

thanx.

1) That is because the objects have smoothed normals. Put a facet SOP after the partition SOP, enable “Unique points”. (which leads to an additional question; is there a way for polygons to have independent normals without duplicating the points? vertices?)

2) In your fractured object DOP, change Collisions -> Surface -> Surface representation from “Points” to “Edges”

eetu.

change the Surface Representatiom in RBD - Collision - Surface from Point to Edges…

cheers,
Bandu