macOS Java Graphics Programming Help

[rolex54]

I am taking a computer science class and I have this lab to do for tomorrow
It is giving me alot of problems, I can't seem to get it right
If anyone can help that would be great...

Thanks!

These are the 3 files that come with the lab
The instructions of what to do
http://dl.getdropbox.com/u/29368/Lab05/Lab05a.doc
the html document
http://dl.getdropbox.com/u/29368/Lab05/Lab05ast.html
and the base file
http://dl.getdropbox.com/u/29368/Lab05/Lab05ast.java

 

[robbieduncan]

You are seriously asking us to do your assignment for you? What do you expect to learn from us doing it?

You will be better off handing in what you have and learning from the constructive feedback you get...

 

[toddburch]

Is there a specific question in there somewhere?

(You're making Texas look bad)

Todd

 

[lee1210]

Is there a specific question in there somewhere?

(You're making Texas look bad)

Todd

You're closer, you go smack him.

to the OP:
have you written anything? do you need help w/ methods to draw lines?

-Lee

 

[rolex54]

well what i need to do is draw that one in at least the 80 point version
The teacher gave us this formula to use
Start + n(total distance traveled/# of repetitions)
but every time i plug it in I am not getting anything like the picture in the instructions...

I have this so far
for(int x=0; x<60; x++)
{
g.drawLine(10,10,10+x*(630/60),640)
}

 

[iShater]

well what i need to do is draw that one in at least the 80 point version
The teacher gave us this formula to use
Start + n(total distance traveled/# of repetitions)
but every time i plug it in I am not getting anything like the picture in the instructions...

I have this so far
for(int x=0; x<60; x++)
{
g.drawLine(10,10,10+x*(630/60),640)
}

What are you getting?

 

[rolex54]

What are you getting?

this...

 

[lee1210]

Edit: Nevermind, not a caching problem. You're getting exactly what you want.

Look at your loop more. Write down the coordinates you want to get, and what you do get:
You are drawing from:
(10,10) to:
(10,640),
(20,640),
(30,640),
...
(600,640)

Is this what you want?

-Lee

 

[iShater]

this...

So the concern is that you are not going all the way to the end of the screen? or that you are starting from the top left? this is what the formula you are using will do.

 

[rolex54]

so what would I use to recreate this? (This is the task that is assigned in the lab sheet)
I don't know why he would give us that formula if it will not work to make this..

 

[lee1210]

http://www.mathsisfun.com/greatest-common-factor-tool.html
Or... math, will get you the GCD. Even without that, you just need to tweak your algorithm.

You're only moving where the line ends, not where it starts. You need to do both. I shouldn't be too bad. For one, you are starting in the upper left corner, (10,10). You need to start in the upper right corner, which is at (990,10). You may have to add and subtract to solve this.

Also, get off of the windows.

Use javac to compile your class on OS X from the terminal, then run:
appletviewer ./Lab05ast.html

Java is cross platform, and something like this does not require an IDE. When you get to the point of needing an IDE, there are others that are cross platform that you can use on OS X.

I don't know why he would give us that formula if it will not work to make this..

He gave you part of the solution, not the whole thing. It wouldn't be serving you if he did the legwork for you.

-Lee

 

[iShater]

Lee, you are too nice again. He should have figured out that 10x10 is the left upper corner. God help us when these students work for us in the 10 years. (Us as in our generation )

 

[lee1210]

Lee, you are too nice again. He should have figured out that 10x10 is the left upper corner. God help us when these students work for us in the 10 years. (Us as in our generation )

At least i didn't understand the coordinate system in awt and gave the wrong numbers. =) Er, maybe? I'm not even really sure yet.

-Lee

 

[toddburch]

I love doing other people's homework.

 

[toddburch]

100 points for me.

 

[lee1210]

Hooray, 100 pts for all!

 

[iShater]

100 points for me.

You are cruel.

 

[toddburch]

Hooray, 100 pts for all!

I used to make these things in elementary school with a needle and thread on a piece of poster board. It was the only time anything I ever created "art-wise" made it to a show. It was displayed at the state capital (Juneau, Alaska) for a few weeks back in the late 60's. Who would have thunk 35+ years later, I'd be making them again, and this time a lot faster, and no sore finger from pushing the needle through.