Algodoo

Nice job, but there is a bug (it is NOT bug free). When the bucket is moved up using the W key, and then the key is released, the bucket slowly drifts down from gravity pulling it down. Real hydraulics should not do that unless there is a problem! Fix that bug and then it will be much better.

i fixed it .thank you .

Okay, great!

Just a message for you: A good programmer or designer never makes the statement "This has no errors or bugs"! ALL programs and designs have bugs and errors, but you just have not found them! When someone else tests your design, they will probably find errors and bugs. I have been an engineer for longer than you have been on this earth, and I learned a long time ago NEVER to say that my designs are bug and error free!

Just as I expected, there are still some bugs in your scene. If the DOWN key is held too long after the bucket is all the way down, it reverses and then starts to go UP! At that point the up and down keys are reversed!

thank you man i glad you like my robots and if you like it see my other bot . later i make a t 90 tank . and believe me it have a much less bugs

and i work on this excavator

http://www.algodoo.com/algobox/details.php?id=139323

i fixed it again

Yes, you fixed that one bug, but there are still some other problems (I'll let you figure out what they are). If you want to do a good job on your scenes (and I'm sure that you do) then you need to TEST your work much more thoroughly. Suggestion: When you are finished making a new scene, do not post it until you have spent a lot of time testing it. TEST, TEST, TEST, TEST! Make sure things work the way they are supposed to work. When you test, and then fix bugs, it might save you the embarrassment of other people (like me) pointing out the flaws, errors, and bugs. Never say that a scene is without bugs and errors, because they are NEVER without bugs and errors!

wow you so wise i never forget your advise

I am wise because I am old.