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Look at the picture bellow...
It's a 100x100 pixels png picture.
There's a black(r=0;g=0;b=0;) dot.
And the other color is white(r=255;g=255;b=255;)...
All I want is to read each pixel RGB value and store them into some array...something like this...

Code: Select all

int i,j;
for(i=0;i<100;i++)
{
    for(j=0;j<100;j++)
    {
        R[i][j]=&r[i][j];
        G[i][j]=&g[i][j];
        B[i][j]=&b[i][j];
    }
}

Afterward, detect the black color indexes...

Code: Select all

int i,j;
for(i=0;i<100;i++)
{
    for(j=0;j<100;j++)
    {
        if(R[i][j]==0&&G[i][j]==0&&B[i][j]==0)
        {
            BlackX=j;
            BlackY=i;
        }
    }
}

So that I would get the X and Y coordinate from the black color of the actor...
Oh yah, I want to read this from an actor's animation, not from an external picture file...

My question is...Does anyone know what's the correct code or method to do this?
I have tried some method but can't figure it out...

i think you need to use the fcommands to open the file, and read the data, but you have to know what you're looking at, and write something to interpret the data from there. Also, compressed images are probably exceedingly difficult due to the lookup indexes they use,

probably bmp is the easiest to do.

Well, you can draw_from to get the animation onto a canvas but....

Fuzzy wrote:... but as it stands, there is no readpixel() function in GE...

from viewtopic.php?f=3&t=1230&

DST wrote:from viewtopic.php?f=3&t=1230&

It seems I need to define each sprite black dot coordinates manually...


But I'm so sure there would be some trick.
Not using canvas nor readpixel() thing, but completely different method...
Maybe using Units[][]