Scratch

it just bounces off the edge even if it isn't touching.

Pecola1 wrote:

GP1 wrote:

okay, so I DON'T actually have the code up yet (well, I guess I do, kinda) and I will now post the spec. in a couple of weeks, I will post the code!!

Code:

('bounce' #- #bounce)

keep looking here  for updates!
(okay, so I think that all of you have the spec who have tried to make it)

LOL. Thanks for the spec at least. Of course i could have made that but, well, anyways... when will you reveal the code? Is it a PRO one, or the usual ones; turn 2*direction, turn 180?

yeah. at first, it will be a stupid, non-pro block. I am testing that one. it hasn't worked (suprising) and others will be the PRO ones. I know that you, in particular, made a project on it. If you put the stupid code in with the spec, then you can replace it later. I added the succi one in the BYOB, but it doesn't work in scratch (yet).

rdococ wrote:

I might attempt to make one in BYOB. It automatically sends itself to the edge, bounce, and come back.
EDIT:
[ Do make sure to tick atomic! ]
[img]http://img163.imageshack.us/img163/2613/capture1a.pnghttp://img163.imageshack.us/img163/2613/capture1a.png[/img]

Click for bigger image.

well, simaler. I could use that, too. one thing, though. what does the atomic button do?

Last edited by GP1 (2011-04-11 21:15:30)

rdococ wrote:

GP1 wrote:

rdococ wrote:

I might attempt to make one in BYOB. It automatically sends itself to the edge, bounce, and come back.
EDIT:
[ Do make sure to tick atomic! ]
[url]http://img163.imageshack.us/img163/2613/capture1a.pnghttp://img163.imageshack.us/img163/2613/capture1a.png[/url]

Click for bigger image.

well, simaler. I could use that, too. one thing, though. what does the atomic button do?

It makes the block do it automatically so you can't see it being done.

oh. well, I can use that for my new and improved bounce block for BYOB

Very clever!
I have a better way to do it with source code:

bounceIfTouching: t1 
    | otherPosition relativePosition oldPosition |
    oldPosition _ self referencePosition.
    t1 ifNil: [^ self].
    (self touching: (self coerceSpriteArg: t1))
        ifFalse: [^ self].
    t1 = #mouse
        ifTrue: [otherPosition _ self mouseX @ self mouseY]
        ifFalse: [otherPosition _ (self coerceSpriteArg: t1) referencePosition].
    otherPosition = self referencePosition ifTrue: [^ self].
    relativePosition _ self referencePosition - otherPosition.
    relativePosition x abs = relativePosition y abs ifTrue: [^ self turnLeft: 180].
    relativePosition x abs > relativePosition y abs
        ifTrue: 
            [self ypos: 1000 * relativePosition y sign.
            self bounceOffEdge]
        ifFalse: 
            [self xpos: 1000 * relativePosition x sign.
            self bounceOffEdge].
    self referencePosition: oldPosition

I hope this is relatively self-explanatory 

Basically, it finds the direction in which it is closest to the sprite, moves to 1000 of that position, bounces off edge, and goes back to its original position.

Last edited by rubiks_cube_guy238 (2011-04-15 16:33:44)

Better bounce block:
[ Still, make sure atomic is ticked! ]

This one does not need a text input. Through, it basically does the same thing: brings the sprite to the edge, if on edge [it will be] bounce, then come back.

[blocks]<when green flag clicked><forever><if><touching[edge]<set{x velocity}to(((<((x velocity<->x velocity))><->x velocity))[/blocks]

Here's the script for a bounce. The object that is bouncing will need to have 2 variables - x & y velocity (see the example projects). I have only included the x velocity script but the y velocity script is the same except you chane the variable. Hope this Helps.

If you don't understand that, here's a written example:

Start clicked
Forever
If - touching [edge]
Set [x velocity] to...((x velocity - x vel.) - x velocity)

That's it. Copy for Y velocity

Last edited by Thugs4less (2011-04-20 23:46:42)

bounceIfTouching: t1
    | otherPosition relativePosition oldPosition |
    oldPosition _ self referencePosition.
    t1 ifNil: [^ self].
    (self touching: (self coerceSpriteArg: t1))
        ifFalse: [^ self].
    t1 = #mouse
        ifTrue: [otherPosition _ self mouseX @ self mouseY]
        ifFalse: [otherPosition _ (self coerceSpriteArg: t1) referencePosition].
    otherPosition = self referencePosition ifTrue: [^ self].
    relativePosition _ self referencePosition - otherPosition.
    relativePosition x abs = relativePosition y abs ifTrue: [^ self turnLeft: 180].
    relativePosition x abs > relativePosition y abs
        ifTrue:
            [self ypos: 1000 * relativePosition y sign.
            self bounceOffEdge]
        ifFalse:
            [self xpos: 1000 * relativePosition x sign.
            self bounceOffEdge].
    self referencePosition: oldPosition

bounceIfTouching: t1 
    | otherPosition relativePosition oldPosition |
    oldPosition _ self referencePosition.
    t1 ifNil: [^ self].
    (self touching: (self coerceSpriteArg: t1))
        ifFalse: [^ self].
    t1 = #mouse
        ifTrue: [otherPosition _ self mouseX @ self mouseY]
        ifFalse: [otherPosition _ (self coerceSpriteArg: t1) referencePosition].
    otherPosition = self referencePosition ifTrue: [^ self].
    relativePosition _ self referencePosition - otherPosition.
    relativePosition x abs = relativePosition y abs ifTrue: [^ self turnLeft: 180].
    relativePosition x abs > relativePosition y abs
        ifTrue: 
            [self ypos: 1000 * relativePosition y sign.
            self bounceOffEdge]
        ifFalse: 
            [self xpos: 1000 * relativePosition x sign.
            self bounceOffEdge].
    self referencePosition: oldPosition