Processing 1.0 - Processing Discourse - clear array if mousreleased

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Index › Programming Questions & Help › Syntax Questions › clear array if mousreleased

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clear array if mousreleased (Read 821 times)

handyaner

clear array if mousreleased
May 1^st, 2009, 6:10am

hello

i want to modify the storing-input example http://www.processing.org/learning/basics/storinginput.html

just if the mouse button is pressed, the blobs should be visible.

the problem is, if i release und press the mouse button again then is visible the old tail.

how can i realize that the old tail will delete, if i release the mouse button

Code:

int num = 60;
float mx[] = new float[num];
float my[] = new float[num];

void setup() 
{
  size(200, 200);
  smooth();
  noStroke();
  fill(255, 153); 
}

void draw() 
{
  background(51); 
  
  // Reads throught the entire array
  // and shifts the values to the left

  for(int i=1; i<num; i++) {
    mx[i-1] = mx[i];
    my[i-1] = my[i];
  } 
  // Add the new values to the end of the array
  mx[num-1] = mouseX;
  my[num-1] = mouseY;
  if (mousePressed == true){
  for(int i=0; i<num; i++) {
    ellipse(mx[i], my[i], i/2, i/2);
  }}
}

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: clear array if mousreleased Reply #1 - May 1^st, 2009, 6:38am Code: Arrays.fill(mx, 0);

handyaner

Re: clear array if mousreleased
Reply #2 - May 1^st, 2009, 7:27am

thanks

but why is in the top left corner a blob, if i press the mouse button?

Code:

int num = 60;
float mx[] = new float[num];
float my[] = new float[num];

void setup() 
{
  size(200, 200);
  smooth();
  noStroke();
  fill(255, 153); 
}

void draw() 
{
  background(51); 

  for(int i=1; i<num; i++) {
    mx[i-1] = mx[i];
    my[i-1] = my[i];
  } 
  mx[num-1] = mouseX;
  my[num-1] = mouseY;
  if (mousePressed == true){
  for(int i=0; i<num; i++) {
    ellipse(mx[i], my[i], i/2, i/2);
  }}
  else {
     Arrays.fill(mx, 0);
    Arrays.fill(my, 0); 
  }

}

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