Day 35

Today, I continued doing the secondary fracturing and also researched on the circular force that blows pre-fractured geometries apart. Someone replied my post on the secondary fracture on odforce forum. He also provided me a file.

I looked through the file and I realised something. The secondary fracture that guy helped me set up is by adding a voronoi fracture configure object into my dops hierarchy. It provides me with very nice fracturing pieces and it also sort of fits the secondary fracture idea I was looking for. But Mr Ron said that that method is calculating the dynamics per frame which takes up more cache space. I agreed fully, as the cooking time increased by so much after it was added.

Out of curiousity, I would like to know why everyone likes to use the voronoi fracture configure object node even if its so heavy. Its like practically every file I get out there uses this node. Just curious though. And I wondered is it possible to replicate the same effect without using the voronoi fracture configure object node.

Below are 2 renders, one with the voronoi fracture configure object node and the other without.

Voronoi fracture configure object node:

 Without Voronoi fracture configure object node:

 

The scatter points and the voronoi fracture node is exactly the same. And the difference could be seen quite clearly. 

Below is the test I did yesterday and it was edited by someone from the odforce forum:

He helped me clean up my dops. Below is the screen shot:

Mr Ron suggested not using the voronoi fracture configure object node as it is calculating real time which takes much too much memory. He suggested increasing the scatter points instead.

 I also did the vortex field test as another way of blowing up the rock into smaller pieces. Below is my initial test:

Mr Ron helped me improve it even further. Instead of using the dops to blow up the pre-fractured pieces, He helped me did it in the pop network. 

Firstly, he added a point in the center of each piece.

Then the point is grouped:

Then the pre-fracture geometries are deleted:

Inside the pop network, a bounding sphere was used to animate the explosion effect. The particles are then grouped inside the bounding sphere. 

Then a force is applied to make the particles move:

Then the inside and outside groups are deleted from the voronoi fracture node. Mr Ron keyed in an argument:

What this argument does is it deletes everything in the