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Index › Programming Questions & Help › Programs › simple geometry problem
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simple geometry problem (Read 879 times)
self
simple geometry problem
Apr 4th, 2006, 2:09am  
Hi,

This is a very simple program that creates a spirographic image. I'm having trouble thinking of a way of making the rotation point of the spirograph  align with the centre of the image. Any help would be appreciated.

size(500,500);
rectMode(CENTER);
for(int x=500;x>0;x=x-2){
 translate(width/3, height/150);
rotate(PI/6);
 rect(100,100,x,x);
 fill((x/2)-30);
 stroke(255);}
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« Last Edit: Apr 4th, 2006, 4:29am by self »  
 
st33d
Re: simple geomtry problem
Reply #1 - Apr 4th, 2006, 2:48am  
errrr...
Code:

size(500,500);
rectMode(CENTER);
translate(width/2.8, -height/8); // addition - mildly central
for(int x=500;x>0;x=x-2){
  translate(width/3, height/150);  
  rotate(PI/6);  
  rect(100,100,x,x);
  fill((x/2)-30);
  stroke(255);
}

I pondered reverse engineering your equation and then ran away in fear.
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WWW  
self
Re: simple geomtry problem
Reply #2 - Apr 4th, 2006, 3:48am  
better fear than disgust I guess... thanks for the quick fix.
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stevecooley
Re: simple geometry problem
Reply #3 - May 2nd, 2006, 5:37pm  
try this:


int x;
float y = 0.1;

void setup()

{
  size(500,500);
  rectMode(CENTER);
  smooth();
}

void draw()
{
  translate(width/2, height/2); // addition - mildly central
  //   translate(2, height/2);  
  rotate(PI/1+y);  
  rect(y,y,x,x);

  fill((x/2)-1);
  stroke(255);

  x=x+1;
  y=y+0.08;
  if(x==100)
  {
    x=0;


  }

} 

void mousePressed()
{
  saveFrame("image-###.tif");
}  



change the y float value that gets added on at the end, and change the "if x==" value too.  Fun.
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self
Re: simple geometry problem
Reply #4 - May 28th, 2006, 8:22am  
fun indeed. thanks stevecooley...
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