64 lines
1.2 KiB
SCSS
64 lines
1.2 KiB
SCSS
//***************************************
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// * 三角函数
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//***************************************
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@function fact($number) {
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$value: 1;
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@if $number>0 {
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@for $i from 1 through $number {
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$value: $value * $i;
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}
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}
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@return $value;
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}
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@function pow($number, $exp) {
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$value: 1;
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@if $exp>0 {
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@for $i from 1 through $exp {
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$value: $value * $number;
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}
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} @else if $exp < 0 {
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@for $i from 1 through -$exp {
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$value: $value / $number;
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}
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}
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@return $value;
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}
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@function rad($angle) {
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$unit: unit($angle);
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$unitless: $angle / ($angle * 0 + 1);
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@if $unit==deg {
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$unitless: $unitless / 180 * pi();
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}
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@return $unitless;
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}
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@function pi() {
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@return 3.14159265359;
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}
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@function sin($angle) {
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$sin: 0;
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$angle: rad($angle);
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// Iterate a bunch of times.
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@for $i from 0 through 10 {
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$sin: $sin + pow(-1, $i) * pow($angle, (2 * $i + 1)) / fact(2 * $i + 1);
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}
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@return $sin;
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}
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@function cos($angle) {
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$cos: 0;
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$angle: rad($angle);
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// Iterate a bunch of times.
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@for $i from 0 through 10 {
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$cos: $cos + pow(-1, $i) * pow($angle, 2 * $i) / fact(2 * $i);
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}
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@return $cos;
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}
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@function tan($angle) {
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@return sin($angle) / cos($angle);
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}
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