61 lines
1.6 KiB
JavaScript
Vendored
61 lines
1.6 KiB
JavaScript
Vendored
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var colors = new Array(
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[62,35,255],
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[60,255,60],
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[255,35,98],
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[45,175,230],
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[255,0,255],
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[255,128,0]);
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var step = 0;
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//color table indices for:
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// current color left
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// next color left
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// current color right
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// next color right
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var colorIndices = [0,1,2,3];
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//transition speed
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var gradientSpeed = 0.002;
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function updateGradient()
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{
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if ( $===undefined ) return;
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var c0_0 = colors[colorIndices[0]];
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var c0_1 = colors[colorIndices[1]];
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var c1_0 = colors[colorIndices[2]];
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var c1_1 = colors[colorIndices[3]];
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var istep = 1 - step;
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var r1 = Math.round(istep * c0_0[0] + step * c0_1[0]);
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var g1 = Math.round(istep * c0_0[1] + step * c0_1[1]);
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var b1 = Math.round(istep * c0_0[2] + step * c0_1[2]);
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var color1 = "rgb("+r1+","+g1+","+b1+")";
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var r2 = Math.round(istep * c1_0[0] + step * c1_1[0]);
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var g2 = Math.round(istep * c1_0[1] + step * c1_1[1]);
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var b2 = Math.round(istep * c1_0[2] + step * c1_1[2]);
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var color2 = "rgb("+r2+","+g2+","+b2+")";
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$('#gradient').css({
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background: "-webkit-gradient(linear, left top, right top, from("+color1+"), to("+color2+"))"}).css({
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background: "-moz-linear-gradient(left, "+color1+" 0%, "+color2+" 100%)"});
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step += gradientSpeed;
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if ( step >= 1 )
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{
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step %= 1;
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colorIndices[0] = colorIndices[1];
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colorIndices[2] = colorIndices[3];
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//pick two new target color indices
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//do not pick the same as the current one
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colorIndices[1] = ( colorIndices[1] + Math.floor( 1 + Math.random() * (colors.length - 1))) % colors.length;
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colorIndices[3] = ( colorIndices[3] + Math.floor( 1 + Math.random() * (colors.length - 1))) % colors.length;
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}
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}
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setInterval(updateGradient,10); |