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Parallel Lines Illusions: Very Tricky!!!

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Join Date: Oct 2004

Posts: 6

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Eclipse

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Parallel Lines Illusions: Very Tricky!!!

Nov 4th, 2004

Okay, if I could, I would shoot my CS teacher, and then shoot myself.

Reality check. Done.

Anyways, check out this yucky program right here...I don't even know where to begin...we need to create a new drawing pad; and by using two methods, we would have to create this illusion image by using only parallel lines and shaded "rectangles". Here's the link to the assignment, since I can't copy or save his files:

Click on Assignment dated 10/25/04, practice with For Loops

Username: cs2
password: 89106

I know I'm asking you guys to go through alot, but I really need help on this. This is a challenging program, and most of the older kids in my class are having BIG trouble solving this assignment...

I'm going to work on it now and see what stuff I can come up with. But please, if you got spare time, take a quick look at the program and see if you can help. Thanks ALOT!!!

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Join Date: Mar 2004

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Phaelax

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Re: Parallel Lines Illusions: Very Tricky!!!

Nov 8th, 2004

Given the date of the assignment, I think I can assume that it's already been due so I suppose I could try and answer it.
I kind of mixed basic and c++ code structures, but I think something like this would work. The only slightly tedious part is the row's offset. It's just nested loops, nothing really tricky here.

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
offset = 0
flag = 0
for y = 0 to 7
	for x = 0 to 13 step 2
		pen.setPosition(x*40 + offset,y*40)
		pen.fillRect(40,40)
 
		pen.setPosition(0 ,(y+1)*40)
		pen.drawLine(0,endOfScreen)  
	next x
	//determine whether to increase or decrease the offset of the row
	//offsets by 3 each time
	if flag = 0 and offset = 6
	{
		flag = 1
	}
	if flag = 1 and offset = 0
	{
		flag = 0
	}
	if flag = 0 then offset += 3
	if flag = 1 then offset -= 3
next y
offset = 0
flag = 0
for y = 0 to 7
	for x = 0 to 13 step 2
		pen.setPosition(x*40 + offset,y*40)
		pen.fillRect(40,40)
		
		pen.setPosition(0 ,(y+1)*40)
		pen.drawLine(0,endOfScreen)  
	next x
	//determine whether to increase or decrease the offset of the row
	//offsets by 3 each time
	if flag = 0 and offset = 6
	{
		flag = 1
	}
	if flag = 1 and offset = 0
	{
		flag = 0
	}
	if flag = 0 then offset += 3
	if flag = 1 then offset -= 3
next y

As for the circles, I don't know what its suppose to look like.

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Join Date: Oct 2004

Posts: 6

Reputation: Eclipse is an unknown quantity at this point

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Eclipse

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Re: Parallel Lines Illusions: Very Tricky!!!

Nov 8th, 2004

Hmm...thanks for replying JUST in time. Luckily, this is due tomorrow, so at least I got some help for now.

I got the circles part myself...lemme see if your code works, Phaelax. and Thanks ALOT!! ^^