I got found the maths package, but I can't find out how to use them. Help?
nooby123 wrote ...
2012/3/4
Sin, cos, and tan?
You do not have to 'import' anything, just prefix the functions with 'Math.' (that 'Math', followed by a dot, followed by the function with its parameters).
Thanks, but it's still not working. The code is:
The line isn't drawing.
1 2 3 4 5 6 7 8 9 | static double x, y; GreenfootImage line=new GreenfootImage(600,600); public void act() { y=Math.sin(x); line.setColor(Color.RED); line.drawLine((int)x,(int)y,(int)x,(int)y); setImage(line); } |
I have places to go, and people to meet. I will be back later.
But for now, try putting a value in for x in line 5
and see what happens.
If you still do not get line drawing, try changing the length of the line on line 7
and see if that helps.
Gotta go. Check ya on the flipside.
1 | y = Math.sin((double) 0.5); |
1 | line.drawLine((int)x, (int)y, (int)(x + 1), (int)y); |
The problem is (as danpost kind of said) that the line you're attempting to draw is of 0 length (x -> x, y -> y) so it won't draw.
If its that you're wanting to do, click here.
(^Shameless self promotion)
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