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Index › Programming Questions & Help › Programs › about the color like  the rainbow
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about the color like  the rainbow (Read 584 times)
laisuper
about the color like  the rainbow
Dec 10th, 2008, 9:58pm  
HI,who can help me? i make the progaramme-change the color like the rainbow.red to violet.but, the programme was black to red ,andthat,it was't circle.

thank u..


// Two variables for color.
float c1 = 0;      
float c2 = 255;  

// Start by incrementing c1.
float c1dir = 0.1;  
// Start by decrementing c2.
float c2dir = -0.1;


void draw() {
 noStroke();
 colorMode(HSB,200);
 
 // Draw rectangle on left
 fill(c2,c1,c1);
 rect(0,0,100,100);

 // Adjust colo r values
 c1 = c1 + c1dir;
 c2 = c2 + c2dir;
 loop();
}
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mb09
Re: about the color like  the rainbow
Reply #1 - Dec 10th, 2008, 10:54pm  
Quote:
float c1 = 0;
void draw() {
  noStroke();
  colorMode(HSB);
  c1+=1;
  c1%=255;
  fill(c1,255,255);
  rect(0,0,100,100);
} 



hope it can help
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rebirth
Re: about the color like  the rainbow
Reply #2 - Dec 11th, 2008, 10:24pm  
hey! that's clever using %= like that! i was printing out c1 to see how it changed and i think it should be c %= 256 though.  either that or the %= should be after the fill(). that way 255 gets a turn before being reset to 0. nitpicking i know but i'm a perfectionist. Smiley
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laisuper
Re: about the color like  the rainbow
Reply #3 - Dec 12th, 2008, 4:10pm  
mb09 wrote on Dec 10th, 2008, 10:54pm:
hope it can help



thanks~it's clever.~
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