Editing mix2 - FilterMeisterWiki

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= mix2 =

== Syntax ==
{{int mix2(int a, int b, int n, int d)}}

== Arguments ==
:'''a'''
::An integer value to be mixed in.
:'''b'''
::An integer value for the base value.
:'''n'''
::An integer value which controls the mixture.
:'''d'''
::An integer value for the range.

== Return ==
An integer which is a mix of '''a''' into '''b''', based on the position of '''n''' in range [0,'''d'''].

== Description ==
This function calculates how much of '''a''' will be mixed into '''b''', proportional to the position of '''n''' in the range from 0 to '''d'''. If '''n''' is 0, the value of '''b''' is returned, if '''n''' is equal to '''d''', the value of '''a''' is returned. For any values of '''n''' in between 0 and '''d''', a proportional value is calculated.

This version of the mix function uses a slightly different algorithm, of the form {{(d == 0) ? 0 : (b - a)*n >= 0 ? b - ((b - a)*n*2 + d)/(2*d) : b + ((a - b)*n*2 + d)/(2*d) ;}}

== Example ==
<code>
%ffp

ctl[0]: "Darken", Range=(0,100)
ctl[1]: COMBOBOX, "mix\nmix1\nmix2", Val=0, Size=(*,60)

ForEveryTile: {
  for (y = y_start; y &lt; y_end; y++) {
    for (x = x_start; x &lt; x_end; x++) {
       for (z=0; z &lt; 3; z++) {
          switch(ctl(1)) {
            case 0: 
              pset(x,y,z, mix(0, src(x,y,z), ctl(0), 100) );
              break;
            case 1: 
              pset(x,y,z, mix1(0, src(x,y,z), ctl(0), 100) );
              break;
            case 2: 
              pset(x,y,z, mix2(0, src(x,y,z), ctl(0), 100) );
              break;
            default: 
              pset(x,y,z, mix(0, src(x,y,z), ctl(0), 100) );
          }
       }
    }
  }
  return true;
}
</code>

== See Also ==
((scl)), ((mix)), ((mix1))

Summary of change:
Add document to category: