Gravity Drops

[Danny]

Hi, I have a few questions; please keep in mind these are directed toward App development. Documentation is good, examples are best

1. If I want to make an ball drop from the top of the (iPod) screen can I do it with Animation Engine or can I do just a good of job in LiveCode 4.5? Is it relatively easy?

(Optional) 2. I want to catch the ball and make it count for points. Would you have/type code to show if it's not to much trouble?

If you are able to answer any of the following questions thank you very much!

[Howlernator]

Hiya Danny,

I can definitely vouch for AnimationEngine to do exactly that. Malte can advise on the level of customisation available on the bounce action, but I've been 'bouncing' things around my screen all week using one simple command (after injesting AE into my mainstack):

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aeMoveTo the name of button objectNo,startLoc,1000,"bounce"

(where 'startLoc' is the position i wanted my object to bounce back to after being moved, and '1000' is the milliseconds that the move should take to complete)

...works a treat. There are many other enhanced 'move' actions as well (ease in/out etc...)

Also, i've found the constrain functions pretty time saving as well, for setting the area that objects are allowed to move around in on drag and release actions...

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set the constrainRectangular of btn "Selection1" to rect of grc "Box"

hope that helps.

Cheers,

A.

[Howlernator]

Oh... and on your second question, i've also been doing something similar based on the intersect of two objects at any time.

I'm not sure that what I'm doing will help you thought as it seems like you want to catch the balls when they are freely moving, as opposed to what I've been doing which is dragging objects and simply testing for intersect of the mouseLoc:

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if the mouseLoc is within the rect of btn circleNo then

etc..

Malte, does AE allow us to test an object for intersect with another during an aeMove command somehow?

[Danny]

Thanks for the advice and help! Well the main object is to drop a ball straight down and catch it in a bucket and have it count for points. I just want it to drop, not bounce so I guess i'm looking for the intersection points as well. Is there a way to try a basic version in LiveCode because i'm not yet sure I can pay $80.

[Dixie]

Hi Danny...

To see balls dropping have a look at :-
http://www.gemetest.ihouse.on-rev.com/
You can download the stack from the web page and look at the scripts..

be well

Dixie

[malte]

> does AE allow us to test an object for intersect with another during an aeMove command somehow?

While an object is moved there are callback messages sent, so yesyou can

The messages you want to handle are aeEnterFrame (before the location is updated) and/or aeExitFrame (after the update)

Hope that helps,

Malte

[malte]

Danny,

dixies stack is a good example. You will want to look at move and intersect in the dictionary if you want to try with plain livecode first.

[Danny]

Thanks to everyone! I'll try these answers and post again soon.

[Dixie]

Danny...

look at the attached stack... your balls in a bucket ..

Dixie

[Danny]

Dixie - haha thanks I will definitely have to consider Animation Engine

But one of the things i've been trying to get to work is having the bucket follow a set line I looked in the dictionary and found move. It says

"Tip: To easily move an object along a curved path, create a curvegraphic using the freehand Curve tool, then use a statement like the following to move the object:
move button "My Button" to the points of graphic "My Curve"

So i filled "My Button" in and "My Curve" to their respective names but it didn't lock on to the line. Help?

[Dixie]

Danny....

Another example... I've modified the previous stack, it is the same as the one before except that now the ball follows the path of the graphic 'drunk'. The graphic drunk is set to invisible, so if you wish to see its path then 'View --> Show Invisible Objects' in the revolution IDE...

Look at the script to see how the ball graphic follows the path of the 'drunk' graphic...

You are able to accomplish a lot with the LiveCode commands, but if your really want some power and to move things around in a really nifty manner then look at Malte Brill's Animation Engine...

[Klaus]

Hi guys,

Danny...
look at the attached stack... your balls in a bucket ..
Dixie

no dirty talking, please!
There are americans who read here, too!



Best

Klaus