Eudes Fileti

Hello JED and Happypolygon. Many thanks for the detailed responses. This last one looks perfect! It's unbelievable the quality of animation we're close to achieving! There is nothing like it on the internet... Just two details, could we replicate them in series, for both sides (positive x and negative x?). Carefully examining your last project, I think the replication of the loops could come when the two charges reverse position (the red one going up to the maximum position, and the blue one going down to the minimum position). Also, can we synchronize them with concentric circles around the vertical axis? If we achieve that, the problem would be solved! See, the most accurate model I've seen on the internet so far are in these photos below in terrible resolution! In the first one (from a Japanese website) it shows how the field is generated close to the source (near-field radiation, NFR). This is the one we're working on! The second image (from a German website) shows (in addition to the NFR) the far-field radiation, which you and JED have already solved, illustrating how the wave behaves far from the source. Note two observations: 1) That although the figure (in Japanese) shows three electric field loops, just one like you made seems to me to be enough, as the picture should be clearer and easier to understand. 2) That important for the model from the point of view of physics. In blue we have the magnetic field lines (concentric circles that should expand as the wave spreads). These circles are synchronized with the movement of the electric field lines and must be oriented in one direction when the charge rises and in the opposite direction when the charge falls. Bests Eudes

Hello JED and Happypolygon. The oscillation model would only be physically consistent if we considered a dipole (a positive and a negative charge oscillating in phase). In fact what causes the electromagnetic wave is not the charge oscillating, but the dipole. With that, physically the curves close their loops. See the image below.

Hello Happypolygon. Thanks for the answer! Yes this is the model of a wave produced by an oscillating charge. The animation of “classical” waves where the fields oscillate sinusoidally and orthogonally to each other is useful to describe radiation already distant from its emitting source. In the case of radiation close to the source (near field radiation) the description of javalab is not adequate. In fact, it is even inaccurate. Just note that the magnetic field lines around a current are concentric circles and not diverging lines. This video you showed is excellent, however it only describes the electrical component of the electromagnetic wave. The magnetic component has been omitted. I found your approach to the lobes interesting, but in 3D they should resemble an apple. But I believe that this “solid” visualization is perhaps not the best one. The best would be the view in lines. Perhaps with the electric field lines on the screen plane and the magnetic field lines on the keyboard plane. From what you said, if there is no way to use equations to describe these lines, I understand that it might even be impossible to treat this visualization with 4D cinema. Bests Eudes

Hello everyone, I would really like to create a small animation of how an electromagnetic wave is generated. We know that it is nothing more than the synchronized oscillation of an electric field that propagates in closed loops (in the plane of the screen) and of a magnetic field that propagates radially in oriented circles (in the plane of the keyboard). The sketch below gives a rough idea of how this works. There is absolutely no animation of this phenomenon on the internet (of course, if it is already difficult to even visualize it, creating a 3D animation is much more complex). I think this might be difficult or even impossible to deal with with Cinema 4D. But given the immense power of this program, I'd like to confirm that it really is impossible before trying some other tool. If anyone has any comments on this I would be very grateful. Bests Eudes

Hello JED thank you very much for the detailed tips. I've been following tutorials on YouTube and I'm already able to make simple (really simple) animations using XPresso! Bests, Eudes.

Hi Happypolygon and JED, thanks a lot for your help! Both methods helped me. In particular, XPresso seems to be more general. JED what do you consider more efficient (in my case, I'm a beginner): adapt your script to my situation or redo XPresso from scratch? Do you know any good XPresso tutorials to recommend?

Hello everyone I'm trying to reproduce the animation below. This is the motion of a loop in a magnetic field. The arrows indicate the forces on the loop and must move connected to the loop but keeping its orientation fixed. Beyond a given critical point of the spin, the pair forces must reverse their direction. Initially I tried to use the CONNECT function to connect the loop and the arrows. However I've been facing difficulties to animate the rotation and the arrows motion simultaneously. I would like to know if there is a more efficient way to make this animation. Some function or trick that facilitates the animation. Any suggestion is welcome! Thank you very much, Eudes.

Hi Jeff, thank you very much! His tip was very accurate. In fact I was with incompatible versions of the plugins. Even so, for some of them (which are older) I had to follow this additional tip I found on Youtube: https://youtu.be/sw6RTzooWSE Bests Eudes. Hi Jeff, thank you very much! His tip was very accurate. In fact I was with incompatible versions of the plugins. Even so, for some of them (which are older) I had to follow this additional tip I found on Youtube: https://youtu.be/sw6RTzooWSE Bests Eudes.

Hello guys, I'm a teacher and I would really like to use the ArrowMaker plugin for my teaching projects. This is a plugin to facilitate the construction of arrows that I use in my physics projects to guide vector quantities (by the way, if there is any suggestion of another tool that can be useful for this purpose, I would like to know!) But the problem here is in relation to the plugin installation. After performing the installation as suggested by Maxon, I can't (or I don't know how) access the plugin from Cinema 4d menus (version R23). I followed two possible paths: 1) copying the plugins to the default folder of C4D and 2) creating a folder anywhere on my HD and indicating to C4D the path of the folder to locate the plugins. Neither of them worked. I also tried installing other plugins like Illuminatti and MotionDrop and likewise none of them are being displayed in the C4D menus. If any of you could help me I would be very grateful. Any suggestion is welcome! Thank you very much Prof. Eudes Fileti - São Paulo - Brazil.

Hi VIZN, thank you for your help. Both tips worked perfectly. Bests, Eudes.

Hello everyone, I'm teacher and I need to make a small animation of a charged particle entering a magnetic field. The particle must perform a spiral movement. It must enter the field in a straight line and only then begin to spiral. For that I'm trying to compose a spline by merging three different shapes: straight+arc+helix. However I have not been able to join these three splines to generate a single path. Is there an effective way to do this? Another problem I'm facing is that when moving over the helix, the particle doesn't keep its speed constant, instead it slows down until it stops. I've already put the keys points in linear interpolation (instead of bezier), but still, I couldn't get the particle to move at constant speed. Could you help me with this too? I'm sending two files attached to help you to help me. If there's a more elegant way to do this (I know field of force is a powerful tool) please any suggestions are welcome! Thank you very much Eudes. carga-num-campo-magnetico.c4d