Animated 3D models of Steam Engines

[abdullah]

Placer can now have a group as target or can be the group of parts itself.


https://github.com/microelly2/Animation ... f75de2bb73

Thanks Microelly2.

I cannot make it work properly. I have tried to use both approaches with the same result.

I am trying to make an group of objects rotate about an axis, where the objects are not located at the same placement and none of them is at the origin (0,0,0).

Using a rotator I can move a single object by using the "rot center relative" to true.

When I use a placer, the relative placement of the different objects in a group changes when the animation is run:

relocated_objects.png (126.12 KiB) Viewed 2474 times

It is like if all objects in the group would move its origin to the same location x0,y0,z0.

properties.png (54.29 KiB) Viewed 2474 times

properties2.png (51.77 KiB) Viewed 2474 times

I simply do not know how to fill in the placer so as to achieve what I want.

Gears_moving.gif (274.94 KiB) Viewed 2474 times

This is done with two rotators, and only one gear of the full center body rotates. It also rotates at 1:1 speed gear-pinion, which is wrong as the ratio is 1:2.5, so the big gear should be 0.4 of the rotation speed of the small gear.

Do you know what I am doing wrong?

[microelly2]

Here an example
I use two placers for two assemblies with different axes and speeds.
In the first step I move/rotate the components of each assembyl to the right starting position
than I create a compound
the compound is rotated

working with a group of elements is difficult because each of your gears has another axis.

[abdullah]

In the first step I move/rotate the components of each assembyl to the right starting position
than I create a compound
the compound is rotated

Thanks!! This is key to make it work.

It is a little bit slow, but it started moving:

Gears_Moving_full.gif (428.17 KiB) Viewed 2449 times

[microelly2]

the speed of the animation is still a problem,
my idea is to create meshes of the objects and run the animation with meshes.
this can be by factor 10 faster but first we need the methods to get the meshes or the pivy objects.
But you always have the possibility to write the image frames and create from them a video.

the more interesting task however is to write a control panel to allow shift the gear.


something like this for gearings
https://youtu.be/DT8X8kwSgUA

[abdullah]

But you always have the possibility to write the image frames and create from them a video.

I had thought of that. I used Peek to record an mp4, which I cut it to a full turn and speedup by 10000% with kdenlive and used ffmpeg to convert it back to gif:

Code: Select all

ffmpeg -y -i diff_full_turn.mp4 -vf fps=5,scale=640:-1:flags=lanczos,palettegen palette.png
ffmpeg -y -i diff_full_turn.mp4 -i palette.png -filter_complex "fps=5,scale=640:-1:flags=lanczos[x];[x][1:v]paletteuse" diff_full_turn.gif

diff_full_turn.gif (977.63 KiB) Viewed 2410 times

the more interesting task however is to write a control panel to allow shift the gear.

It would really be nice. I have to think if I go there as the problem is that while you do something you can't do something else

[abdullah]

Nice is always a video, but it is not under 1 Mb

phpBB [video]

(I give up! How can such a youtube video be embedded in the forum, I have tried like 10 different ways so far, none working... )

[kkremitzki]

Nice is always a video, but it is not under 1 Mb

[youtube]https://www.youtube.com/embed/yD2qIRvFq6g[/youtube]

(I give up! How can such a youtube video be embedded in the forum, I have tried like 10 different ways so far, none working... )

Use "video", not "youtube", in your tags:

Edit: removed duplicate video since his post was fixed

[abdullah]

Use "video", not "youtube", in your tags:

Thanks!!! Much better now

[atmaja]

Hi Brother,

I have question about animation "Rotator", can I make the toation looks faster?
I have made some screw simulation but the speed very slow.

Thanks

[microelly2]

Hi Brother,

I have question about animation "Rotator", can I make the toation looks faster?
I have made some screw simulation but the speed very slow.

Thanks

There is no way to make the running animation faster because for each frame the 3d View has to be rendered.
For complex models this takes time. So the only way to get a fast animation is to record the flow as a sequence of images (use photographer node)
and render the image sequences as a video. However in this case you lose realtime interactivity.

There are still other ways to improve speed:

Use meshes instead of parts
Use grid representation of the faces.
Use models with less details.