100 lines
2.4 KiB
SCSS
100 lines
2.4 KiB
SCSS
// REGULAR SCANLINES SETTINGS
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// width of 1 scanline (min.: 1px)
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$scan-width: 2px;
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// emulates a damage-your-eyes bad pre-2000 CRT screen ♥ (true, false)
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$scan-crt: true;
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// frames-per-second (should be > 1), only applies if $scan-crt: true;
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$scan-fps: 60;
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// scanline-color (rgba)
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$scan-color: rgba(black, 0.2);
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// set z-index on 8, like in ♥ 8-bits ♥, or…
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// set z-index on 2147483648 or more to enable scanlines on Chrome fullscreen (doesn't work in Firefox or IE);
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// $scan-z-index: 2147483648;
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// MOVING SCANLINE SETTINGS
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// moving scanline (true, false)
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$scan-moving-line: true;
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// opacity of the moving scanline
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$scan-opacity: 0.75;
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// MIXINS
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// apply CRT animation: @include scan-crt($scan-crt);
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@mixin scan-crt($scan-crt) {
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@if $scan-crt == true {
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animation: scanlines 1s steps($scan-fps) infinite;
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} @else {
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animation: none;
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}
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}
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// apply CRT animation: @include scan-crt($scan-crt);
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@mixin scan-moving($scan-moving-line) {
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@if $scan-moving-line == true {
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animation: scanline 6s linear infinite;
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} @else {
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animation: none;
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}
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}
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// CSS .scanlines CLASS
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.scanlines {
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position: relative;
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overflow: hidden; // only to animate the unique scanline
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&:before,
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&:after {
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display: block;
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pointer-events: none;
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content: "";
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position: absolute;
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}
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// unique scanline travelling on the screen
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&:before {
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// position: absolute;
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// bottom: 100%;
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width: 100%;
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height: $scan-width * 1;
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// z-index: $scan-z-index + 1;
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background: $scan-color;
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opacity: $scan-opacity;
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// animation: scanline 6s linear infinite;
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@include scan-moving($scan-moving-line);
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}
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// the scanlines, so!
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&:after {
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top: 0;
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right: 0;
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bottom: 0;
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left: 0;
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// z-index: $scan-z-index;
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background: linear-gradient(to bottom, transparent 50%, $scan-color 51%);
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background-size: 100% $scan-width * 2;
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@include scan-crt($scan-crt);
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}
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}
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// ANIMATE UNIQUE SCANLINE
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@keyframes scanline {
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0% {
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transform: translate3d(0, 200000%, 0);
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// bottom: 0%; // to have a continuous scanline move, use this line (here in 0% step) instead of transform and write, in &:before, { position: absolute; bottom: 100%; }
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}
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}
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@keyframes scanlines {
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0% {
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background-position: 0 50%;
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// bottom: 0%; // to have a continuous scanline move, use this line (here in 0% step) instead of transform and write, in &:before, { position: absolute; bottom: 100%; }
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}
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}
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