Hey,

i am trying to draw a perpindecular line to some existing line, like shown below:



I start with two points A and B that form a line, and calculate point C like so:
C.x = (A.x + B.x) / 2;
C.y = (A.y + B.y) / 2;

Now how could I calculate D?
I know I could just draw my line again and rotate it by 90° degrees but I would like to get it working without this little cheat ;)
Any help really appreciated, I guess its not that hard but I dont see it ...

Cheers

 

Heya,

I am trying to add an options menu to my processing sketch activity. Trying to create the menu by inflating a menu resource like this:

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.game, menu);
        return true;
    }

Ends in "R does not have a field menu" , which is bullshit. I do have a plain menu.xml file, and it is also referenced in the generated R.java file.
Okay, so I thought maybe I can create the menu by code instead of using an xml. That works to some extent, I can create a menu with default text buttons using this method:

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(0, 1, Menu.NONE, "Play");
        menu.add(1, 2, Menu.NONE, "Pause");
        menu.add(2, 3, Menu.NONE, "Options");
        return super.onCreateOptionsMenu(menu);
    }

Cool, but: I cannot set Icons like that, so I am stuck with the default ugly text button style. When I try to reference my menu items in a variable and use "setIcon(..)" I again have to give it an icon resource, which it does not find (R has no field blabla...).
Very annoying. Any ideas why it tells me R does not have the fields although it has?

EDIT: When I use the code in a normal "Activity"-class, it works. When I use it inside a "PApplet"-class (having added the processing-core.jar to the build path of the project), it no longer finds any resources of the project from inside the class...
Any ideas how to tackle this?

Cheers

Hi there,

I am just starting with Android + Processing + Eclipse (yes it's evil I know, still...). Ive got a simple android app running, with one activity and a simple sketch inside that lets me draw colored ellipses. I can send it to my HTC Wildfire S with no problem.

Now I have 2 questions that I am having a tough time answering:

How do I use Toasts within the processing code? Is it even possible? Crashes my app instantly.

How do I override the default key behaviour? I want to use the volume keys to change some variables, and it works, but still they change the volume at the same time.
I have set the keyCode to 0 as described in the wiki, does not work, also not on the BACK button:

<code>
    public void keyPressed() {
        background(255); // clear canvas
       
        if (key == CODED && keyCode == KeyEvent.KEYCODE_BACK) {
            keyCode = 0;
            Log.i("App_ButtonPressed", "Back Button pressed!");
        }
        if (key == CODED && keyCode == KeyEvent.KEYCODE_MENU) {
            Log.i("App_ButtonPressed", "Menu Button pressed!");
        }
        if (key == CODED && keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
            keyCode = 0;
            Log.i("App_ButtonPressed", "Volume Down Button pressed!");
        }
        if (key == CODED && keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
            keyCode = 0;
            Log.i("App_ButtonPressed", "Volume UP Button pressed!");
        }
    }
}

</code>

I am glad for any advice or pointing in the right direction! One thing: is there a code-context for this forum to colorize code?
Cheers