Scratch

meew0 wrote:

A block idea:

http://imgur.com/CnjUm.gif

Hey meew0, a cool feature about Scratch is remixing, and it's the same for BYOB apparently!

I've made you block easier for me to understand:

Why do you need an inverse of () block?

It's as simple as 0 - number! That makes a positive number a negative, and a negative number a positive! What's so complicated about that? Why is the script in the first post so complicated?

Ok, double posting i know but, I made an inverse block, P.s. this requires the Int of () block because of a calculation it has to make at the end, if you can find a solution, feel free to tell me.

markyparky56 wrote:

I made a Int of () block!

http://img710.imageshack.us/img710/4742/intblock.gif

I see a flaw though. What if the input does not include a period?

And also, perhaps you don't understand the BYOB process. At the end, you don't set the input to a new value - you have to do ' [report (int_list as text)] '.

Last edited by Lucario621 (2010-04-27 19:21:49)

soupoftomato wrote:

Block 3: inverse of ()
This block gives the inverse (opposite) of a number.

1. Click "Make a block," and select "Operators," as the block group. For the type of block, you need to select the round, "reporter" block. In the naming bar, type, "inverse of." Press OK.

2. You should see the hat block with a block that says, "inverse of," in it. Remember how we added variables where the plus signs were last time? Do that after "of." When it asks for it's name, type, "number."

3. Because there are two types of inverses, positive, and negative. We need the script to check if the number is positive or negative. Put on if statement that says, "if number(the variable we made)> 0." And another if statement that says, "if number < 0."

4. Make a new variable called number1. In the first if, put "set number1 to (0-number). In the second if, put, "set number to (-1*number).

5. Now you're done and your scripts should look like this:



6. Press OK

Exactly what are you doing here?!
subtracting from zero and multiplying by negative one always produces the same result! I mean, really? I quote you saying, "two types of inverses, positive and negative." No there aren't. What the heck are you talking about. Are you trying to say, "the inverse of a positive number is negative, and the inverse of a negative number is positive"? Because its sign doesn't matter! Let's try a few examples, shall we?

#1: inverse of 3
0 - 3 = -3
3 * -1 = -3

#2: inverse of -10
0 - (-10) = 10
-10 * -1 = 10

#3: inverse of 0
0 - 0 = 0
0 * -1 = 0

I think that covers everything, doesn't it? See what I mean?

Last edited by nXIII (2010-05-02 11:50:43)

MathWizz wrote:

nXIII wrote:

soupoftomato wrote:

Block 3: inverse of ()
This block gives the inverse (opposite) of a number.

1. Click "Make a block," and select "Operators," as the block group. For the type of block, you need to select the round, "reporter" block. In the naming bar, type, "inverse of." Press OK.

2. You should see the hat block with a block that says, "inverse of," in it. Remember how we added variables where the plus signs were last time? Do that after "of." When it asks for it's name, type, "number."

3. Because there are two types of inverses, positive, and negative. We need the script to check if the number is positive or negative. Put on if statement that says, "if number(the variable we made)> 0." And another if statement that says, "if number < 0."

4. Make a new variable called number1. In the first if, put "set number1 to (0-number). In the second if, put, "set number to (-1*number).

5. Now you're done and your scripts should look like this:

http://img213.imageshack.us/img213/2454/inverseof.gif

6. Press OK

Exactly what are you doing here?!
subtracting from zero and multiplying by negative one always produces the same result! I mean, really? I quote you saying, "two types of inverses, positive and negative." No there aren't. What the heck are you talking about. Are you trying to say, "the inverse of a positive number is negative, and the inverse of a negative number is positive"? Because its sign doesn't matter! Let's try a few examples, shall we?

#1: inverse of 3
0 - 3 = -3
3 * -1 = -3

#2: inverse of -10
0 - (-10) = 10
-10 * -1 = -10

#3: inverse of 0
0 - 0 = 0
0 * -1 = 0

I think that covers everything, doesn't it? See what I mean?

Wait, wait, wait... I think you made an error in you math!

#2: inverse of -10
0 - (-10) = 10
-10 * -1 = -10

-10 times -1 does not equal -1. To negative numbers produce a product of a positive number. I even checked it on my calculator.

I'm just a fifth grader! And that post sounded really smart alec.

I got my information from Lucario621's post in some topic in the Suggestions. http://scratch.mit.edu/forums/viewtopic.php?id=34645

But know that I see that, it says use one of the following.

But, that post just basically said, "YOUR STUPID!"

What if you do that inverse script with a non-number. It won't work, you can't really times a string or take 0 away from it can you? My one works fine with letters and numbers.

I have an idea Include BYOB in scratch 2.0

I need help making a clone me block anyone know how?

Does anyone think they can make a   do [  and [    E shaped block because I have been trying to do it and it didn't work. It would help with so many of my projects.

Last edited by ScratchReallyROCKS (2010-05-09 22:30:40)

Jens wrote:

Hi ScratchReallyROCKS,

it's cool that you're experimenting with creating your own control structures in BYOB! If you're trying to make your sprite do several things at the same time you can try putting the LAUNCH block into the code for the second C-shaped command block. This should do the trick.

hey thanks Jens, I switched the RUN blocks in my custom block with LAUNCH blocks and it did exactly what I wanted it to     

Actually, I could probably make a tutorial for this...

Last edited by ScratchReallyROCKS (2010-05-10 06:51:13)

Hey, Jens, I uploaded a project that shows how to make all the blocks I made in BYOB, So far it only has the do [ and [ block in it. I wish I could add more but I can't think of any. Anyone have any idea for a block that I could make?

  And by the way, how do you add photos to forum posts? Then I could just post pictures instead of having to make project to show people things.

Last edited by ScratchReallyROCKS (2010-05-10 15:58:42)

I wonder if we need think a bit more about the names we are using for parameters (we've never had to bother as much now). For example,

animates costumes [firstCostume] through [lastCostume] with a speed of [speed]

makes you think that to increase the speed of the animation you increase the last parameter, whereas you actually decrease it. We could change the 'name' of the block to ... with a delay of [delay] or alternatively change the wait to something like wait 10 - speed.

I know this goes someway against the philosophy of Scratch but I think it could be important.