Hi , i got this simple code , but the i have a problem with the if statement.


I want that when i press the mouse the strokeWeight gets bigger by one pixel everyframe so i did this :

 
  if ( mousePressed = true ){
   strokeWeight ++;    
 }

But the compiler says it canot find anything named strokeWeight ??? a built in function in Processing.

here's the code
Code:

void setup(){

  size ( 300,300);
  background (#FF0F4C);

}

void draw (){
  
    smooth();
  frameRate(12);
 int step = height/10;  
  fill();
  rect(0,0,width,height);
  
  

 
  for ( int i=step ; i< height ; i+=step){
    strokeWeight ( i*.1);
    stroke (255);
    line (20,i,width-20,i);
    
    // this is the problematic part
    
   if ( mousePressed = true ){
    strokeWeight ++;    
  }
}
} 

I also would like to know how to make the rectangle that i added to refresh the backgrounf not to show the borders , but if i add a noStroke to the code then the lines wont appear , what should i do ?

Thanx !

Thanx !

But it still nt do what i want.

I want that when i press the mouse button, it makes the strokeWeight bigger.

Also i would like to delete the stroke of the rectangle of the background wich updates the background.

This is the code :

Code:

void setup(){

  size ( 300,300);
  background (#FF0F4C);

}

void draw (){
  
    smooth();
  frameRate(12);
  
  //declare variables
 int step = height/10;  
int weight=0;

//update background color
  fill(#FF0F4C);
  rect(0,0,width,height);
  
  // Algor  
  for ( int i=step ; i< height ; i+=step){
    strokeWeight ( i*.1);
    stroke (255);
    line (20,i,width-20,i);
    
    // this is the problematic part
	 if ( mousePressed == true ){
    weight++;    
  }
}
} 

Thanx Philho,

But it  still dont increases the strokeWeight when i press the mouse , this is my code now with your tips.

Code:

void setup(){

  size ( 300,300);
  background (#FF0F4C);
 smooth();
  frameRate(12);
}

void draw (){
  
   
  
  //declare variables	    
 int step = height/10;  
int weight=0;

//update background color				  
background (#FF0F4C);
  
  // Algor					
  for ( int i=step ; i< height ; i+=step){
    strokeWeight ( i*.1);
    stroke (255);
    line (20,i,width-20,i);
    
    // this is the problematic part  
	 if ( mousePressed == true ){
    weight++;    
  }
}
} 

well actually i didnt, is just that i tried and it didnt work , look this is the code with the int weight variable is at the very top.


It still dont make the strokeWeight bigger, incrementally every frame, asi i want.


any other ideas ?

Here's the code with the weight variable is at the very top.

Code:

int weight=0;
 
void setup(){

  size ( 300,300);
  background (#FF0F4C);
 smooth();
  frameRate(12);
}

void draw (){
  
   
  
  //  Declare variables	    
 int step = height/10;  

//   update background color				  
background (#FF0F4C);
  
  //    Algorithm				    
  for ( int i=step ; i< height ; i+=step){
    strokeWeight ( i*.1);
    stroke (255);
    line (20,i,width-20,i);
    
    //   this is the problematic part  
	 if ( mousePressed == true ){
    weight++;    
  }
}
} 

for ( int i=step ; i< height ; i+=step){
   strokeWeight ( i*.1);
   stroke (255);
   line (20,i,width-20,i);
   
      if ( mousePressed == true ){
   weight++;    
 }
}

at this part you should substitute the strokeWeight(i*.1) with strokeWeight(weight) to start applying the variable weight as the value of strokeWeight() function.

besides you should try placing your if statement outside the for loop for it to read at each draw cycle and not each for iteration.

so your code should probably look like this for it to work the way you want:

for ( int i=step ; i< height ; i+=step){
   strokeWeight (weight); //substituting (i*.1) with (weight)
   stroke (255);
   line (20,i,width-20,i);
}
// placing if outside for loop
if ( mousePressed == true ){
   weight++;    
}

You need to declare your weight variable outside the draw.  You keep resetting your weight to 0 every time it draws, so it doesn't matter that you're pressing the mouse.  Place it before your setup.

Code:

 
int weight=0;

void setup(){

  size ( 300,300);
  background (#FF0F4C);
 smooth();
  frameRate(12);
}

void draw (){
 
//   update background color				  
background (#FF0F4C);

  //  Declare variables	    
int step = height/10; 

  //    Algorithm				    
  for ( int i=step ; i< height ; i+=step){
   strokeWeight (weight); //substituting (i*.1) with (weight)
   stroke (255);
   line (20,i,width-20,i);
}
// placing if outside for loop
if ( mousePressed == true ){
   weight++;    
} 
}