float function

[Moritz]

Hallo everybody,

i need some help

How can i use comma numbers like " 12.5 " in simple math functions? I know it from normal C, that it works with float function, but 4D says "float not supported, value 12.5"

pls help with a little example

Thanks a lot

[ESPsupport]

Picaso only supports integers, not floating point.

In general most simple floating point math can be done in integer, it's just a matter of 'upscaling' and 'downscaling' in some way.

Eg if 12.5 is the only decimal you could use 25, or 125 instead and adjust the result accordingly. It depends on the equation, the range of the numbers and the format/scale the ultimate answer needs to be in.

[Moritz]

Thanks for your answer Mark.

Ok thats bad for my projekt :/

[ESPsupport]

What is the full calculation you need to do?

[Moritz]

I found a solution Thanks

I am new in the 4d Systems, I try a lot and get better. I plan to make a computer gadget for my bike (school projekt).

[ESPsupport]

On pretty much any computer integer math is always faster than floating point math, so if you can 'reduce' a calculation to be done with integers without too much 'manipulation', then it will be faster to use the integer solution.

[Moritz]

Jep thats right mark Thanks.

Now i play with visi, but i don't get it why the button always disappears after the first hit?
Its a simple Prog. I want to test Buttons but it works not so fine

pls help me out

greetings Moritz



gfx_Set(SCREEN_MODE,LANDSCAPE) ;
touch_Set(TOUCH_ENABLE);

var state,button;

// Form1 1.1 generated 04.03.2016 18:29:28

// 4Dbutton1 1.0 generated 04.03.2016 18:29:28
img_ClearAttributes(hndl, i4Dbutton1, I_TOUCH_DISABLE); // set to enable touch, only need to do this once
img_Show(hndl, i4Dbutton1); // show button, only do this once
img_SetWord(hndl, i4Dbutton1, IMAGE_INDEX, state); // where state is 0 for up and 1 for down
img_Show(hndl,i4Dbutton1) ;



repeat
state := touch_Get(TOUCH_STATUS);
button:= img_Touched(hndl, i4Dbutton1) ;

if(touch_Get(TOUCH_STATUS) == TOUCH_PRESSED)
switch
case(button == i4Dbutton1)
gfx_Cls();
print("Button1 ist gedrueckt");
pause(2000);
gfx_Cls();
break;

case(button == -1)
gfx_Cls();
print("Button1 isn't hit");
pause(2000);
gfx_Cls();
break;

endswitch
endif

forever

[ESPsupport]

gfx_Cls() does what it says, it clears the screen, so anything on it will be gone. If you 'must' clear the whole screen you need to 'img_show' the buttons to get them back. Why not just clear part of the screen (with a filled rectangle of the background colour)?

[Moritz]

Ahhh Ok thx, but why the button don't light up when i push him ?

[ESPsupport]

Look at the code that was pasted when you pasted the code

mg_SetWord(hndl, i4Dbutton1, IMAGE_INDEX, state); // where state is 0 for up and 1 for down
img_Show(hndl,i4Dbutton1)

What's the comment say on the first line?

You need to change and reshow the state.

HAve a look at some of the supplied examples more closely

[Moritz]

I i'll take a closer look
still a lot to learn for me
Thanks