Object Arrays and Accessing Variables

Programming Questions

falimond

Object Arrays and Accessing Variables

in Programming Questions • 1 year ago

Hello, I am trying to change an object's variable when the mouse is pressed but I must be doing something wrong. The error I get: The type of the expression must be an array type but it resolved to sketch_###.Drop

(drops[] was previously initialized and working properly with the rest of my program)

void mousePressed(Drop drops) {
for(int i = 0; i < counter; i++) {
if(dist(mouseX,mouseY,drops[i].x,drops[i].y) < 20)
drops[i].speedX += 1;
}
}

I can get rid of the error by using...

void mousePressed(Drop drops[]) {
//....//
println("test");
}

But then mousePressed is unresponsive because "test" will not print.

Replies(2)

PhiLho

Re: Object Arrays and Accessing Variables

1 year ago

You pass a single Drop to the function, but try to use it as an array. It cannot work, hence the error message.
Passing a real array solves the compilation problem, but it looks like you never call mousePressed(Drop[]).
Don't expect Processing to call it: it only know and will only call mousePressed(), the version without parameters!
You have to access global variables from this function.

falimond

Re: Object Arrays and Accessing Variables

1 year ago

Therefore I must test the regular mousePressed parameter and trigger a function call with my array as the argument. Thank you, your response cleared things up for me.

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