[[DeathTV] Sid 6.7]

This is something I gave up on because I don't have the time but for those wanting to know how it could be done, here it is.

To make a rainbow HUD message (assuming you know how to do HUD syncs and work HUD msg's) you will need to setup a synchronized hud msg and redraw it with a new color each time. For the color, we are going to rotate around this cone to get the rainbow effect



Using the Hue value which is measured in degrees. To travel along the outer edge, set saturation and value to 1.0 (100%). You will have to keep a static Float value for hue and increment it, say by 3.0, each time. To get your r,g,b values, we are going to call on this function

 
//Used for color cycling the HSV model
//Code adapted from http://www.buena.com/articles.shtml, "Adventures in HSV Space"
//saturation: 0 is dull gray, 1 is full color, value: 0.0 is dark, 1.0 is full luminance
HSVtoRGB(&Float:h, Float:s, Float:v, &Float:r, &Float:g, &Float:b){
 if(h > 360.0) h -= 360.0
 else if(h < 0.0) h += 360.0
 if (s == 0) {
  r = v;  g = v;  b = v;
 } else {
  new Float:fHue, Float:fValue, Float:fSaturation;
  new i;  new Float:f;  new Float:p,Float:q,Float:t;
  if (h == 360.0) h = 0.0;
  fHue = h / 60.0;
  i = floatround(fHue,floatround_floor);
  f = fHue - i;
  fValue = v;
  fSaturation = s;
  p = fValue * (1.0 - fSaturation);
  q = fValue * (1.0 - (fSaturation * f));
  t = fValue * (1.0 - (fSaturation * (1.0 - f)));
  switch (i) {
   case 0: {r = fValue; g = t; b = p;}
   case 1: {r = q; g = fValue; b = p; }
   case 2: {r = p; g = fValue; b = t;}
   case 3: {r = p; g = q; b = fValue;}
   case 4: {r = t; g = p; b = fValue;}
   case 5: {r = fValue; g = p; b = q; }
  }
 }
}

This will also make sure your hue value doesn't get out of range, so don't worry about infinitely incrementing your hue value.
The r,g,b values passed back by this function are in the range of 0.0 to 1.0, so do this to them
floatround(r*255.0)
to get them normalized. Then call this on every clock tick you define

set_hudmessage(floatround(r*255.0),floatround (g*255.0),floatround(b*255.0),xpos,ypos,0)

then show it.
Buena suerte~

[Styles]

wow this looks very cool...

[JFeldon]

Sweet, looks good. Might use it

[Shaman]

You should use "while" loops so the function can work with hue values greater and lesser than 720:

HSVtoRGB(Float:hue, Float:saturation, Float:value, &red, &green, &blue)
    {
    //Check input
    while(hue=>360.0)
        h-= 360.0
    while(hue<360.0)
        h+= 360.0
    
    saturation= floatclamp(saturation, 0.0, 1.0)
    
    value= floatclamp(value, 0.0, 1.0)
    
    //Convert
    new i= floatround(hue/60.0, floatround_floor);
    new Float:f= hue/60.0-i;
    new Float:p= value*(1.0-saturation)
    new Float:q= value*(1.0-(saturation*f))
    new Float:t= value*(1.0-(saturation*(1.0-f)))
    
    new Float:fRed
    new Float:fGreen
    new Float:fBlue
    
    switch (i)
        {
        case 0:
            {
            fRed= value
            fGreen= t
            fBlue= p
            }
        case 1:
            {
            fRed= q
            fGreen= value
            fBlue= p
            }
        case 2:
            {
            fRed= p
            fGreen= value
            fBlue= t
            }
        case 3:
            {
            fRed= p
            fGreen= q
            fBlue= value
            }
        case 4:
            {
            fRed= t
            fGreen= p
            fBlue= value
            }
        case 5:
            {
            fRed= value
            fGreen= p
            fBlue= q
            }
        }
    
    red= floatround(fRed)
    green= floatround(fGreen)
    blue= floatround(fBlue)
    }

[[ --<-@ ] Black Rose]

Originally Posted by Shaman You should use "while" loops so the function can work with hue values greater and lesser than 720: while(hue=>360.0) h-= 360.0 while(hue<360.0) h+= 360.0

Do you know how to use this magical operator %?
You simply delete the loops and replace them with

hue = hue % 360;

It also eliminates negative values.

 server_print("360: %d", 360 % 360);
 server_print("-360: %d", -360 % 360);
 server_print("-90: %d", -90 % 360);
 server_print("90: %d", 90 % 360);
 
 /*
 * 360: 0
 * -360: 0
 * -90: 270
 * 90: 90
 */

[HLM]

I would REALLY like to use this, but I need to learn how to script..

[Emp`]

Originally Posted by Superiority Do you know how to use this magical operator %? You simply delete the loops and replace them with hue = hue % 360; It also eliminates negative values. server_print("360: %d", 360 % 360);  server_print("-360: %d", -360 % 360);  server_print("-90: %d", -90 % 360);  server_print("90: %d", 90 % 360);    /*  * 360: 0  * -360: 0  * -90: 270  * 90: 90  */

IIRC the % operator does not work with floats

[Hawk552]

Originally Posted by Emp` IIRC the % operator does not work with floats

I just checked and there's no float modulus function. I might write one up myself.

[Hawk552]

Here, try this. It's untested:

PHP Code:

stock Float:floatmod( Float:a, Float:n, mode = 0 )
{
    new Float:result = a - n * floatround( a / n )
    if ( mode )
        if ( a < 0 ) result = -floatabs( result )
        else result = floatabs( result )
    else
        if ( n < 0 ) result = -floatabs( result )
        else result = floatabs( result ) 

    return result
} 


[[ --<-@ ] Black Rose]

Originally Posted by Emp` IIRC the % operator does not work with floats

Then make it an int.