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Index › Programming Questions & Help › Syntax Questions › how to draw a dotted line
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how to draw a dotted line? (Read 2265 times)
stephanie
how to draw a dotted line?
Aug 20th, 2008, 8:02pm  
hi, i'm pretty new in processing. want to draw a dotted line. is there something like linestyle?
thanks
s.
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Cedric
Re: how to draw a dotted line?
Reply #1 - Aug 20th, 2008, 8:24pm  
guess you have to draw it like that :

for(int i = 10; i<width; i+=10){
ellipse (i,height/2,2,2);  
}
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Cedric
Re: how to draw a dotted line?
Reply #2 - Aug 20th, 2008, 8:33pm  
but i guess depends on what you want to draw...

this is another example, but maybe someone know some other helpfull tipps...


void setup(){
 size(400,400);
 smooth();
 noStroke();
 }
 
 void draw(){
   background(255);
   float rad = 100;
   for(int a = 0; a<360; a+=5){
   float xoff = cos(radians(a))*rad;
       float yoff = sin(radians(a))*rad;
       fill(0);
       ellipse(width/2+xoff,height/2+yoff, 2, 2);
   }    
 }
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PhiLho 
Re: how to draw a dotted line?
Reply #3 - Aug 20th, 2008, 10:05pm  
See also Drawing a dashed line
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Cedric
Re: how to draw a dotted line?
Reply #4 - Aug 20th, 2008, 10:18pm  
true, thats another great way and makes it alot easier... another example in the reference : http://processing.org/reference/lerp_.html

but i guess its not possible to use it to follow bezier() curves right? or is there an easy way? just asking myself
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Cedric
Re: how to draw a dotted line?
Reply #5 - Aug 21st, 2008, 2:41am  
if you use alot of dotted lines maybe something like this is usefull for you... just call dottedLine() like you would call line()


void setup(){
 size(400,400);
 smooth();
}

void draw(){
 fill(255);
 dottedLine(0,0,300,300,40);
 dottedLine(50,30,340,200,60);
 fill(255,0,0);
 dottedLine(100,250,300,200,20);

}



void dottedLine(float x1, float y1, float x2, float y2, float steps){
 for(int i=0; i<=steps; i++) {
   float x = lerp(x1, x2, i/steps);
   float y = lerp(y1, y2, i/steps);
   noStroke();
   ellipse(x, y,2,2);
 }
}
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stephanie
Re: how to draw a dotted line?
Reply #6 - Sep 1st, 2008, 3:48pm  
thank you very much! ...so many good information.
...sorry for my late reply, had 10 days off.
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