# Simulation of objects falling one after another

I would like to animate a great number of Cubes, falling from a plane located in a determined height, one after another. Each cube should be placed close to the cube placed before.

What I've want to do is deploying a sort kind of barrier (in several horizontal layers). To simulate the real life implementation I simply moved one element higher than the other, but in this way (obviously) the simulation gets affected by the gravity. I know how to through the element at steady speed, but it could be more realistic if each element appears after that the previous one has already reached the ground (it should be simulate a "crane" that places these elements on the building site).

Has somebody advices how to do it?

Thanks.

• do you want to use physic or not? – moonboots Dec 2 '19 at 12:13
• any suggested idea is welcome – Riccardo Centi Dec 2 '19 at 12:27
• so maybe take a look at a basic tutorial about cube falling on a plane with Physics, the cube are Rigid Body > Active, the plane is Rigid Body > Passive – moonboots Dec 2 '19 at 12:53
• do all cubes need to be there at the beginning? maybe you could toy around with a particle emitter. – Luciano Dec 3 '19 at 10:50
• no they don't; the particle emitter could be a good idea, but how can "emit" cubes instead of particles? – Riccardo Centi Dec 3 '19 at 11:03

So if you want to test physics, here what you could try:

• Create 3 objects, a cube, a funnel, a plane.

• Make your funnel and plane Rigid Bodies, Type > Passive (they are obstacles), Shape > Mesh (the topology will be taken into account).

• Make the cube a Rigid Body, Type > Active (it will fall), Shape > Mesh (not necessary in that case I guess). Duplicate the cube. If all your cubes are ready and different, just give the Rigid Body to one of them, select all, then the one with Rigid Body and in 2.8, Object > Rigid Body > Copy From Active (in 2.7, T panel > Physics > Copy From Active).

• Start the animation, the cubes fall.

• If you want to keep them close to each others, create a Force Field > Force with a negative Strength.

• thanks, but actually I want to place them in order to create a sort-kind of grid, like a barrier – Riccardo Centi Dec 3 '19 at 8:50
• ok so maybe edit your question to give a full explanation of what you want, maybe show a drawing etc... – moonboots Dec 3 '19 at 9:09
• I attached the .blend file; what I've want to do is deploying a sort kind of barrier (in several horizontal layers). To simulate the real life implementation I simply moved one element higher than the other, but in this way (obviously) the simulation gets affected by the gravity. I know how to through the element at steady speed, but it could be more realistic if each element appears after that the previous one has already reached the ground (it should be simulate a "crane" that places this elements on the building site) – Riccardo Centi Dec 3 '19 at 9:25
• ok I'll try to find a solution when I'll have time, maybe don't mark my answer as good so that someone else has the curiosity to check your question ;) – moonboots Dec 3 '19 at 11:24
• great, thanks!! – Riccardo Centi Dec 3 '19 at 11:45