Hi folks,

it seems that i understand not realy the scope of variables ...

When i work with an variable in an if-condition the newly variables created in this if-statement are only local for this condition. (?!)

How can i access the variables created in those if-conditions?



void setup() {
 size(300, 300);
 background(64);
}

void draw() {

stroke(128);
noFill();
arc(150,150,250,250,0,360);
arc(150,150,200,200,0,360);
arc(150,150,150,150,0,360);
arc(150,150,100,100,0,360);
arc(150,150,50,50,0,360);
stroke(255);
line(150,25,150,275);
line(25,150,275,150);

// later the values XPOSF1 and YPOSF1 are catched from a txt-file ... therefor a "String"
String XPOSF1 = "-0.013";
String YPOSF1 = "+0.032";

float xpos = float(XPOSF1);
float ypos = float(YPOSF1);

if ( xpos < 0) { // PosX im Minus
  String posx_string = ""+xpos;
  String posx_string_splitted[] = split(posx_string, '.');
  int coordinate_x = 150-Integer.parseInt(posx_string_splitted[1]);
 
  //println(coordinate_x);
}
if (xpos > 0) { // PosX im Plus
  String posx_string = ""+xpos;
  String posx_string_splitted[] = split(posx_string, '.');
  int coordinate_x = 150+(Integer.parseInt(posx_string_splitted[1])/2);
 
  //println(coordinate_x);
}
if ( ypos < 0) { // YPos im Minus
  String posy_string = ""+ypos;
  String posy_string_splitted[] = split(posy_string, '.');
  int coordinate_y = Integer.parseInt(posy_string_splitted[1])+150;
 
  //println(coordinate_y);
}
if (ypos > 0) { // YPos im Plus
  String posy_string = ""+ypos;
  String posy_string_splitted[] = split(posy_string, '.');
  int coordinate_y = 150-(Integer.parseInt(posy_string_splitted[1])/2);
 
  //println(coordinate_y);
}
stroke(234,0,0);
fill(234,0,0);

// arc can't access coordinate_x or coordinate_y ... coordinate_x should be 137 and coordinate_y 164

arc(coordinate_x,coordinate_y,3,3,0,360);

}

When i do so i will became an Semantic error ...

Code:

void setup() {
  size(300, 300);
  background(64);
}

void draw() {
 int coordinate_x, coordinate_y;

 stroke(128);
 
 String XPOSF1 = "-0.013";
 String YPOSF1 = "+0.032";
 
 float xpos = float(XPOSF1);
 float ypos = float(YPOSF1);

 if ( xpos < 0) { // PosX im Minus
   String posx_string = ""+xpos;
   String posx_string_splitted[] = split(posx_string, '.');
   int coordinate_x = 150-Integer.parseInt(posx_string_splitted[1]);
 }
 if (xpos > 0) { // PosX im Plus
   String posx_string = ""+xpos;
   String posx_string_splitted[] = split(posx_string, '.');
   int coordinate_x = 150+(Integer.parseInt(posx_string_splitted[1])/2);
 }
 if ( ypos < 0) { // YPos im Minus
   String posy_string = ""+ypos;
   String posy_string_splitted[] = split(posy_string, '.');
   int coordinate_y = Integer.parseInt(posy_string_splitted[1])+150;
 }
 if (ypos > 0) { // YPos im Plus
   String posy_string = ""+ypos;
   String posy_string_splitted[] = split(posy_string, '.');
   int coordinate_y = 150-(Integer.parseInt(posy_string_splitted[1])/2);
 }
 
 println(coordinate_x + "," + coordinate_y);
 
}
 

Quote:

After some reading througt the reference i've choosen another way ...

nf() is a little bit handier in my case (imho)

But thanks anyway, John!!

Code:

void setup() {
  size(300, 300);
  background(64);
  noLoop();
}

void draw() {
 stroke(128);
 noFill();
 arc(150,150,250,250,0,360);
 arc(150,150,200,200,0,360);
 arc(150,150,150,150,0,360);
 arc(150,150,100,100,0,360);
 arc(150,150,50,50,0,360);
 stroke(255);
 line(150,25,150,275);
 line(25,150,275,150);
 
 String XPOSF1 = "-0.050";
 String YPOSF1 = "+0.050";
 
 float xpos = float(XPOSF1);
 float ypos = float(YPOSF1);

 if ( xpos < 0 && ypos < 0) { // PosX im Minus und PosY im Minus
   String posx_string = nf(xpos,1,3);
   String posy_string = nf(ypos,1,3);
   int posx_string_splitted[] = int(split(posx_string, ','));
   int posy_string_splitted[] = int(split(posy_string, ','));
   int coordinate_x = 150-posx_string_splitted[1];
   int coordinate_y = 150+posy_string_splitted[1];
   draw_point(coordinate_x, coordinate_y);
 }

 if (xpos > 0 && ypos < 0) { // PosX im Plus und PosY im Minus
   String posx_string = nf(xpos,1,3);
   String posy_string = nf(ypos,1,3);
   int posx_string_splitted[] = int(split(posx_string, ','));
   int posy_string_splitted[] = int(split(posy_string, ','));
   int coordinate_x = 150+posx_string_splitted[1];
   int coordinate_y = 150+posy_string_splitted[1];
   draw_point(coordinate_x, coordinate_y);
 }

 if ( xpos > 0 && ypos > 0) { // PosX im Plus und YPos im Plus
   String posx_string = nf(xpos,1,3);
   String posy_string = nf(ypos,1,3);
   int posx_string_splitted[] = int(split(posx_string, ','));
   int posy_string_splitted[] = int(split(posy_string, ','));
   int coordinate_x = 150+posx_string_splitted[1];
   int coordinate_y = 150-posy_string_splitted[1];
   draw_point(coordinate_x, coordinate_y);
 }

 if (xpos < 0 && ypos > 0) { // PosX im Minus und YPos im Plus
   String posx_string = nf(xpos,1,3);
   String posy_string = nf(ypos,1,3);
   int posx_string_splitted[] = int(split(posx_string, ','));
   int posy_string_splitted[] = int(split(posy_string, ','));
   int coordinate_x = 150-posx_string_splitted[1];
   int coordinate_y = 150-posy_string_splitted[1];
   draw_point(coordinate_x, coordinate_y);
 }
}

void draw_point(int xloc, int yloc)
{
  stroke(255,0,0);
  fill(255,0,0);
  arc(xloc, yloc,7,7,0,360);
}