Array problem

Programming Questions

dodjix

in Programming Questions • 2 years ago

I'm new in processing and I have a basic problem with 2d array.

my code:

float[][] pointsArray;

void setup()

{

pointsArray= new float[4][4];

float[][] pointsArray = {

{

0, 1, 2, 3

}

,

{

3, 2, 1, 0

}

,

{

3, 5, 6, 1

}

,

{

3, 8, 3, 4

}

};

}

void draw()

{

print(pointsArray[1][1]);

}

I don't understand why my value keep in 0...

thank your for your futur Help

Replies(2)

jeff_g

You're overriding the global varible in your setup with float[][] pointsArray, making it local to setup. The first line in your setup initializes the global pointsArray. You're second line creates a new local variable pointsArray, which is disposed of at the end of setup(). Your draw calls the global, which is still empty. You would think that removing float[][] in the setup should fix it, but Processing doesn't like creating a array via {} when you define the array earlier. So I guess you could do this:

float[][] pointsArray = {
{
0, 1, 2, 3
}
,
{
3, 2, 1, 0
}
,
{
3, 5, 6, 1
}
,
{
3, 8, 3, 4
}
};
void setup()
{
// pointsArray= new float[4][4];
}
void draw()
{
println(pointsArray[1][1]);
}

float[][] pointsArray;
void setup()
{
pointsArray= new float[4][4];
float[][] pArray = {
{
0, 1, 2, 3
}
,
{
3, 2, 1, 0
}
,
{
3, 5, 6, 1
}
,
{
3, 8, 3, 4
}
};
pointsArray = pArray;
}
void draw()
{
println(pointsArray[1][1]);
}

dodjix

Re: Array problem

2 years ago

Tank you it's work !

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