index color value 2005-06-13 - By ozu's mailbot
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<pre style="margin-top: 0.5em;" class="js">According to people in the know at
SOFTIMAGE, the secret formula to
encode RGB values into the wireframe color integer is the following:
wirecolor is a 10bit <tt>BBBGGGRRR0</tt> value where the first 3 bits are the
most significant (out of 8) bits of Blue <tt>BBB00000</tt>, Green <tt>GGG00000<
/tt> and Red <tt>RRR00000</tt> respectively and the last bit is left unused.
<b>Convert RGB to wire color</b>. This is done by shifting the red,
green and blue values 5 places to the right, keeping only the 3
leftmost bits and shifting right to the correct position for red green
and blue respectively.
</pre>
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<pre style="margin-top: 0.5em;" class="js">function RGBToWire(r,g,b)
{
var red = ( ( r >> 5 ) & 7 ) << 1;
var green = ( ( g >> 5 ) & 7 ) << 4;
var blue = ( ( b >> 5 ) & 7 ) << 7;
return ( red | green | blue );
}
var red = 224;
var green = 96;
var blue = 0;
var wire = RGBToWire(red, green, blue);
LogMessage( "("+ red +","+ green +","+ blue +") = "+ wire);
</pre>
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<b>Convert wire color to RGB</b>. This is done by applying the inverse
transformation.<br>
<tt>function WireToRGB( wire )
{ <br>
var color = new Object; <br>
color.r = ( ( wire >> 1 ) & 7 ) << 5;<br>
color.g = ( ( wire >> 4 ) & 7 ) << 5;<br>
color.b = ( ( wire >> 7 ) & 7 ) << 5;<br>
return color;<br>
}
<br>
<br>
var wire = 62;<br>
var color = WireToRGB(wire);<br>
LogMessage( wire +" = ("+ color.r +","+ color.g +","+ color.b +")" );</tt>
<pre style="margin-top: 0.5em;" class="js">
</pre>
<br>
<br>
<a class="moz-txt-link-abbreviated" href="mailto:fgiard@(protected)">fgiard
@(protected)</a> wrote:<br>
<blockquote cite="mid1118669017.42ad88da02723@(protected)"
type="cite">
<pre wrap="">Hi everyone,
is there a quick way to convert rgg to index? (I want to set wireframe
according to bones rgb)
thank you,
-Francois Giard
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