Hi

I was looking for some tutorial or example code about the RS232 reading/writing stuff from the Nspire, but I did not find anything yet (I found the stuff on hackspire, but there's no code there if I'm not mistaken)
Has someone written some code to do this?

What I want to do is reading and writing from/to the serial port, because of the reading part it has to be done in C, unless there's another solution I don't know about.

Thanks
Nick

Hi

I saw the xkcd widget for unix, and thought of making one for windows (I don't know if someone already has made one).

So here it is, features:
 - opens at last comic
 - browse like you would on the site (previous, next, random)
 - hover the image to get number & name of comic
 - click and hold image to move form
 - double click image to go to site
 - max width of 500px, max height of 400px

Sometimes it's needed to double click, since the comics might be big, and the image is not big enough in that case.

Closing has to be done with [alt][F4] because I thought it would disturb the layout if I added a close button or border in any way.



Enjoy!

Hi

Here is another video of a script I made today (I didn't really work long on it, so it's not really complete and useable) that i wanted to show you.
It is a rope physics script that can be downloaded below.

The video description tells more about it, everyone can use it if they want, feel free, but as I told you, it is not really working as it should be. For example the gravity seems to work perfectly as you look, but in the code it's a total mess

SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED, thanks Jim!
Hi

While working on my Uno game, I discovered something very strange.
I wanted to make an animation in which a card moves from one place to another, and therefore I need to determine the angle between the position is is now, and the position it has to travel to. To do this, I use math.atan2( xdifference, ydifference), which return an angle in radians.

When I let the computer software (runs OS 3.2) calculate everything works fine, and the card moves from the position it is to where it has to go, like it should.
Buut when I run exactly the same code, just transfered via usb, on my calc (nspire cx cas, os 3.1.0.392), it doesn't work. The angle it returns is about half the size of the one from the student software, while using exact the same calculations.

Am I not seeing something? Or is there some mess up with radians vs. degrees on software and calc?

Here's the code:
function TheGame:timer()
    local xDif = math.abs(self.movingCardPos[1]-self.defPos[1])
    local yDif = math.abs(self.movingCardPos[2]-self.defPos[2])
    local dirX = xDif/(self.movingCardPos[1]-self.defPos[1])
    
    if xDif<5 and yDif<5 then
        timer.stop()
        table.insert(self.pack, self.movingCard)
        self.movingCard = nil
        self.movingCardPos = nil
    else
        local tan = math.atan2( yDif, xDif )
        if dirX>0 then
            self.movingCardPos[1] = self.movingCardPos[1]-4*math.cos(tan)
        else
            self.movingCardPos[1] = self.movingCardPos[1]+4*math.cos(tan)
        end
        self.movingCardPos[2] = self.movingCardPos[2]-4*math.sin(tan)
        platform.window:invalidate()
    end
end

screenie pc:


screenie calc:


The number in the corner is the value returned by math.atan2(), of which you can see it differs

Solved: I had to update the screenSize after init, because that seems to return 0 at the beginning. Thanks Jim!!

Hi everyone

As you may have (or may not have) noticed I was gone for quite a while, about 6 months i guess. I came to visit now and then, but never actually reacted to something or made something new. But that's changed, 'cause I'm back in bussiness! I just had about enough of any calc related stuff for a while... but since I'm having exam stress right now, I needed something to relax, so I started a new program/game. You probably know it, it's the most famous/fun/hilarious/etc. cardgame existing, UNO!

I just started yesterday, but I suppose it's kinda finished, so I would ask you guys a favor to test it if you want. Any bugs/glitches/crashreporst may be posted here or in pm (thanks).
It's two version, a normal one and a small one. The images take up quite a lot of memory, so I made one with smaller images, and it runs slightly faster, but it's not as good looking as the normal one (the gameplay and code is exactly the same, just the images changed).

Here are some eye-candies:


the first one is from the normal version, the other ones are from the small version.

controls:
[r]eset
[.] move to next player (i did not let this go automatically because now you can follow what each player does --> you can think what cards are left)
[<][>] select card from own collection to lay down on pile
[enter] confirm card you want to lay down (there's a check to see if it is legit to lay that card, so no cheating should be possible)
[esc] another reset
[tab] take card from pack if you cannot lay down one that fits

edit: [enter] without any selection makes you skip, that is when you cannot lay any card that is legit.

also, the black bar indicates the player that is on the move.
And it has 3 AI's obviously, you are the one with the shown cards, the other ones pick their cards themselves.

Any questions, remarks, bugs, glitches may be posted

greetings,
Nick

P.S. it feels good to be back, i missed it

Found bugs/mistakes/glitches:
 - Number 0 as card not available
 - Ndless loop when only one Player (AI) left

It seems like some people have different rules than the standard ones, if so, note them, i'll try to add them to a settings dialog
 - 2 of exact the same cards can be laid down at the same time
 - If another player lays down a card, you can lay down exactly the same one if you have it (even if it's not your turn)

Hi

i know lot's of the people here are interested in more than only calculator development. So i decided to put a little more arduino stuff in here.
i recently bought a color screen for my arduino, the MI0283QT-2 from watterott.com.

it's a wonderful screen, resolution 320*240 with touch (resistive). and it runs quite smooth with the arduino.
now there's an example of conway's game of life, which you can see in the video.

i just wanted to show this, because it's lovely and i hope you like it...



btw, i did not make it myself, it's an example program from the manufacturer

Hi

i'm having trouble with a part of my code

1) a little bit of background information
I'm having a table filled with class instances, from the class cell. each instance has these values:
     - xPos
     - yPos
     - radius
     - xMov
     - yMov

2) every loop i want to remove all the cells with a radius of zero (so self.radius = 0)
as far as i know, i can't do this with a for loop, since removing items out of the table while working with the tablelength in a for loop messes up everything

here's the code

cell = class()
cellTable = {}

timer.start(0.01)

function cell:init(x,y,radius)
self.xPos = x
self.yPos = y
self.radius = radius
self.xMov = math.random(-1,1)
self.yMov = math.random(-1,1)
end

function on.create()
text = "no collision"
end

table.insert(cellTable, cell(10,10,10))
table.insert(cellTable, cell(100,90,20))
table.insert(cellTable, cell(69,200,10))
table.insert(cellTable, cell(180,50,10))
table.insert(cellTable, cell(150,150,10))

function on.timer()
for k,v in pairs(cellTable) do
v:move()
end
removeCells()
platform.window:invalidate()
end

function on.paint(gc)
for k,v in pairs(cellTable) do
v:paint(gc)
end
checkCollision(cellTable)
end

function removeCells()
        --here's the part that should remove items out of the list
end

function checkCollision()
        --This function check for collisions (you don't say) and decreases or increases the radius when needed
end


this is only part of the code, but it's the part that matters (it's a school project i'm working on, and should not yet be made available till after the exams)

i hope i made pyself clear, and as always, any help would be greatly appreciated

Nick