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Index › Programming Questions & Help › Programs › Curves 1 from Ira

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Curves 1 from Ira (Read 430 times)

baudry

Curves 1 from Ira
Jun 21^st, 2008, 9:08pm

Hello today I try to modify a script from Ira for my home page hust for test

my script is here

/*
Curves 1

from ira midified size by Olivier , June 2008

*/
int steps = 300;
float[ ]x = new float[steps];
float[ ]y = new float[steps];
float[ ]xSpeed = new float[steps];
float[ ]ySpeed = new float[steps];

void setup (){
size (460, 780);
background (255);
float margin = height*.1;
smooth();
strokeWeight(1.5);
for (int i=0; i<steps; i++){
x[i]= 0;
y[i] = random(margin);
xSpeed[i] = random(.75, 1.2);
ySpeed[i] = random(1.0075, 1.04);
}

for (int i=0; i<steps;i++){
while(y[i]<height){
point(x[i], y[i]);
y [i] = random(margin);
x[i]+=xSpeed[i];
y[i]*=ySpeed[i];
}
}
}

I test this script on xp with processing 0135 it don't run and 0142, I think some errors inside processing or not understand this script

Olivier

Ira

Re: Curves 1 from Ira
Reply #1 - Jun 23^rd, 2008, 4:10am

there were a couple typos in your code.
Corrected code:
Code:


/*
Curves 1
 from ira midified size by Olivier , June 2008
 */
int steps =  300;
float[]x = new float[steps];
float[]y = new float[steps];
float[]xSpeed = new float[steps];
float[]ySpeed = new float[steps];
 
void setup (){
  size(460, 780);
  background(255);
  float margin = height*.1;
  smooth();
  strokeWeight(1.5);
  for (int i=0; i<steps; i++){
    x[i] = 0;
    y[i] = random(margin);
    xSpeed[i] = random(.75, 1.2);
    ySpeed[i] = random(1.0075, 1.04);
  }
 
  for (int i=0; i<steps; i++){
    while(y[i]<height){
     point(x[i], y[i]);
     x[i]+=xSpeed[i];
     y[i]*=ySpeed[i];
    }
  }
}

Unfortunately, some whitespace is tolerable and some is not. You had one extra space between the braces [ ] in your array declarations, which was one source of the problem. The other source was the assignment statement "y [i] = random(margin);" in your while loop causing an infinite loop. I did go back and check the original code from the book, which did not have these typos.

Processing: Creative Coding and Computational Art
http://friendsofed.com/book.html?isbn=159059617X

The Essential Guide to Processing for Flash Developers
http://www.friendsofed.com/book.html?isbn=9781430219798

Center of Creative Computation
Meadows/Lyle
SMU, Dallas

baudry YaBB Newbies Offline Posts: 15	Re: Curves 1 from Ira Reply #2 - Jun 23^rd, 2008, 11:17am Thanks for your response Have you got an pc windows with firefox I would like to understand my error ? when you see http://olivierbaudrydesign.free.fr/ a display window appears with javascript error and Plugins are necessary for see page. I use firefox 3 on windows xp

JohnG Ex Member	Re: Curves 1 from Ira Reply #3 - Jun 23^rd, 2008, 12:02pm <param name="code" value="/wp-content/themes/oupocreanum/processing/Curves1/Curves1" /> needs to be <param name="code" value="Curves1" /> I think.

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