Attaching objects and mouse stuff

Hello everyone,

I am a graphic designer interested in indie game dev.

I have a few questions, since i am not good at english i draw some stuff to explain myself...

How can i physically attach sprite objects to another sprite object. Like attaching layers in After effects...

i want to attach three sprites to each other like this

<img src="http://img37.imageshack.us/img37/6555/chartzs.png">

and want them to move according to third attached object

<img src="http://img651.imageshack.us/img651/9567/chart2f.png">

And i want to rotate the a sprite object, according to the change in mouse y while holding cfirst button.

Any help or idea would be great thanks to all

I was wondering this one myself. I thought the only solution would be to get the original translation, and use that to reposition A and B in an Always event.

You have to create hinges with the physics behavior.Lucid is an expert in this field.So if you need pro advice ask Lucid.

sorry, gray lines was for illustrative purposes. I don't want them to be really there. Just wanted to say objects move according to another object

Ok ive created an exe demo file.You have to get the orbit plugin in order for the capfile to work.It's the orbiter plugin from chris Hackmann.

Here is the exe file.

http://dl.dropbox.com/u/7658043/orbit.exe

Isn't there a way to do it without a plug-in?

One way to do it without plug-ins would be to give objects A and B two private variables each, storing their angle and distance from object C. Then just update A and B's position and angle every frame relative to object C.

Here's an example of that and mouse rotation:

http://dl.dropbox.com/u/5426011/examples2/AttachObjectExample.cap

made in 0.99.94

That's exactly what I had in mind

What if I wanted to create a hinge or motor?

Thanks a lot everyone

nice diagrams btw

You could also use image points.

So with image points, i think i have to align image points to same place. am i correct?

is there a align function for that?

No but you can manually input the coords in the upper left.