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Index › Programming Questions & Help › Syntax Questions › curves chapter in Processing handbook
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curves chapter in Processing handbook (Read 311 times)
gordon
curves chapter in Processing handbook
Feb 8th, 2009, 3:09pm  
hey there,

I am working through Ben and Caseys Processing handbook. I'm pretty new to programming and have become stuck on one of the exercises on page 84. I am sure the solution is simple... please help if you can.

It is to do with converting equations to create curves. I have tested the following equation:

y = x^n

with this code as explained in the book:

for(int x = 0; x < 100; x++){
 float n = norm(x, 0.0, 100.0);
 float y = pow(n, 4);
 y *= 100;
 point(x, y);
}

I am now trying to complete the exercise of converting the equation:

y = 1 - x^4

How do I do this? I have experimented with the lerp() function and map but I am going a little crazy. Please help if you can.
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TVS
Re: curves chapter in Processing handbook
Reply #1 - Feb 8th, 2009, 4:21pm  
What about:
float y = 1 - pow(n,4)?

and otherwise you could make a help-variable:
float helpY = pow(n,4);
float y = 1 - helpY;
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gordon
Re: curves chapter in Processing handbook
Reply #2 - Feb 8th, 2009, 4:27pm  
TVS wrote on Feb 8th, 2009, 4:21pm:
What about:
float y = 1 - pow(n,4)

and otherwise you could make a help-variable:
float helpY = pow(n,4);
float y = 1 - helpY;


of course. What a muppet I am. Struggled abit with the emd of this chapter. Thanks for the help.
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