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POCan't convert from HSL to RGB
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  1. POCan't convert from HSL to RGB
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    copied!<p>I have a problem with converting a color from HSL to RGB. I've written the following function:</p> <pre><code>struct RGB { float r, g, b; }; RGB hslToRgb( float hue, float saturation, float lightness ) { RGB rgb1, rgbResult; float chroma = ( 1.0 - (float) abs( 2.0 * lightness - 1.0 ) ) * saturation; float h1 = hue / 60.0; float x = chroma * ( 1.0 - (float) abs( (float) ( (int) h1 % 2 ) - 1.0 ) ); if ( ( 0 &lt;= h1 ) &amp;&amp; ( h1 &lt; 1 ) ) { rgb1.r = chroma; rgb1.g = x; rgb1.b = 0.0; } else if ( ( 1 &lt;= h1 ) &amp;&amp; ( h1 &lt; 2 ) ) { rgb1.r = x; rgb1.g = chroma; rgb1.b = 0.0; } else if ( ( 2 &lt;= h1 ) &amp;&amp; ( h1 &lt; 3 ) ) { rgb1.r = 0.0; rgb1.g = chroma; rgb1.b = x; } else if ( ( 3 &lt;= h1 ) &amp;&amp; ( h1 &lt; 4 ) ) { rgb1.r = 0.0; rgb1.g = x; rgb1.b = chroma; } else if ( ( 4 &lt;= h1 ) &amp;&amp; ( h1 &lt; 5 ) ) { rgb1.r = x; rgb1.g = 0.0; rgb1.b = chroma; } else if ( ( 5 &lt;= h1 ) &amp;&amp; ( h1 &lt; 6 ) ) { rgb1.r = chroma; rgb1.g = 0; rgb1.b = x; } else { rgb1.r = 0.0; rgb1.g = 0.0; rgb1.b = 0.0; } float m = lightness - 0.5 * chroma; rgbResult.r = rgb1.r + m; rgbResult.g = rgb1.g + m; rgbResult.b = rgb1.b + m; return rgbResult; } </code></pre> <p>here it is its test:</p> <pre><code>float cHue = 0.0; while ( cHue &lt; 360 ) { RGB rgb1 = hslToRgb( (int) cHue, 1.0, 0.5 ); // max on saturation and a middle value for lightness printf( "r = %f, g = %f, b = %f\n", rgb1.r, rgb1.g, rgb1.b ); cHue += 1.0; } </code></pre> <p>but I get only 1.0 and 0.0 when I need to get all range between this "integers".</p> <pre><code>r = 1.000000, g = 0.000000, b = 1.000000 r = 1.000000, g = 0.000000, b = 1.000000 r = 1.000000, g = 0.000000, b = 1.000000 r = 1.000000, g = 0.000000, b = 0.000000 r = 1.000000, g = 0.000000, b = 0.000000 r = 1.000000, g = 0.000000, b = 0.000000 </code></pre> <p>Can anyone help me with this code? Formulas from: <a href="http://en.wikipedia.org/wiki/HSL_and_HSV" rel="nofollow">http://en.wikipedia.org/wiki/HSL_and_HSV</a></p>
 

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