For what the world uses algodoo for shopping, marble race, characters, drawing, ETC ... In a physics simulation software or Can you imagine! It gives me the trouble to see the creator of Algodoo to see that people do not do what he would have wanted to see, such as educational scene, programs, simulations, machines, etc! But no, most do characters, races, kind of event, have him publish his, while it is not even educational! I made a scene on the x-ray and it was educational, because it is a bit related to physics. I hope that my message will be educational to read.
Speaking of a two-dimensional world, I just wanted to simplify things to better understand the physical concepts. I know that our reality is in three dimensions, but by imagining a two-dimensional world, we can approach certain aspects of special relativity without having to think of the third dimension which complicates everything.
You are right to say that when we are on Earth, we are immobile in relation to it. I said that to explain that we consider our own motion to be zero relative to the Earth. It helps us to have a reference point to observe the movements of the particles in the LHC.
When I said a "still observer" I meant someone who is off Earth, in space. It's just to introduce an external point of reference with which to measure the speed of the Earth's motion.
You should thank AI. I use an AI to help me create better descriptions. I start by writing a basic text, and then I simply ask the AI to make it more detailed and richer in words.
What I want to do is create a Doppler effect for gravity. Imagine a red circle moving at a certain velocity, generating a Doppler effect for gravity, as gravity propagates at the speed of light. If we were on the green circle, we would observe the past of the red circle as well as its gravitational effect from the past. This works in a similar way to galaxies. When we observe galaxies through a telescope, they are not actually where they appear in the photos because we are seeing their past. It depends on the distance between the observer and the emitter. Therefore, the closer the green circle is to the red circle, the less significant the apparent shift in the position of the red circle will be.
Okay, but can you show me at least how to change the direction towards which the green circles will be attracted? Instead of falling towards the red circle, they will fall at a 30-degree angle to the left, as if the red circle were there?
I believe that "Sim.gravityAngleOffset" allows for changing the direction of the gravity vector. However, if you're not familiar with coding, it's not a problem. I will try your idea.