Problem with emitting dust from RBD on Impact

[pbarua]

I've a pre_fracture sphere that is falling down on ground as RBD Fractured Object. When it hits ground, it breaks apart and emit particles on collision(Impacts). I used two methods for that. In method_01

I created an add node which creates a point for each impact at the proper position using dopfield function. Then I added a copy node to create a point for each record on the object using dopnumrecords function.

Then I append another copy node to get the number of RBD fracture pieces and make a copy for each using to arg expressions. Finally I created a popnet node to emit particles on impacts.

Every thing works fine, except emitting unnecessary particles on origin(0,0,0).

In methode_02

I created an add node with single point and appended copy to copy that point as many times as Impacts occurred using dopnumrecords function in number of copies field. Then I added a point sop to get the exact positions of pieces using dopfield expression in Position field. The I copied a grid on those points. Finally I added a popnet.

In this case particles are being emitted only from first piece which objID is 0 (in my case that is piece0 and objID is 2).

I attached my hip file.

Kindly help.

dust_from_RBD.hipnc

[SergeM]

Sipmle way? to use "RBD IMPACTS" from "Rigid Body" shelf. This command adds a few nodes into DOP and adds the attribs for use into SOP context such as the coordinates and force of impacts. You can use it for ammiting POP for smoke base.

Sorry for my english.