81 lines
1.7 KiB
Vue
81 lines
1.7 KiB
Vue
<template>
|
|
<span ref="container" :class="$style.root">
|
|
<span ref="el" :class="$style.inner" style="position: absolute">
|
|
<slot></slot>
|
|
</span>
|
|
</span>
|
|
</template>
|
|
|
|
<script lang="ts" setup>
|
|
import { onMounted, onUnmounted, shallowRef } from 'vue';
|
|
const el = shallowRef<HTMLElement>();
|
|
const container = shallowRef<HTMLElement>();
|
|
const props = defineProps({
|
|
x: {
|
|
type: Boolean,
|
|
default: true,
|
|
},
|
|
y: {
|
|
type: Boolean,
|
|
default: true,
|
|
},
|
|
speed: {
|
|
type: String,
|
|
default: '0.1s',
|
|
},
|
|
rotateByVelocity: {
|
|
type: Boolean,
|
|
default: true,
|
|
},
|
|
});
|
|
|
|
let lastX = 0;
|
|
let lastY = 0;
|
|
let oldAngle = 0;
|
|
|
|
function lerp(a, b, alpha) {
|
|
return a + alpha * (b - a);
|
|
}
|
|
|
|
const updatePosition = (mouseEvent: MouseEvent) => {
|
|
if (el.value && container.value) {
|
|
const containerRect = container.value.getBoundingClientRect();
|
|
const newX = mouseEvent.clientX - containerRect.left;
|
|
const newY = mouseEvent.clientY - containerRect.top;
|
|
let transform = `translate(calc(${props.x ? newX : 0}px - 50%), calc(${props.y ? newY : 0}px - 50%))`;
|
|
if (props.rotateByVelocity) {
|
|
const deltaX = newX - lastX;
|
|
const deltaY = newY - lastY;
|
|
const angle = lerp(
|
|
oldAngle,
|
|
Math.atan2(deltaY, deltaX) * (180 / Math.PI),
|
|
0.1,
|
|
);
|
|
transform += ` rotate(${angle}deg)`;
|
|
oldAngle = angle;
|
|
}
|
|
el.value.style.transform = transform;
|
|
el.value.style.transition = `transform ${props.speed}`;
|
|
lastX = newX;
|
|
lastY = newY;
|
|
}
|
|
};
|
|
|
|
onMounted(() => {
|
|
window.addEventListener('mousemove', updatePosition);
|
|
});
|
|
|
|
onUnmounted(() => {
|
|
window.removeEventListener('mousemove', updatePosition);
|
|
});
|
|
</script>
|
|
|
|
<style lang="scss" module>
|
|
.root {
|
|
position: relative;
|
|
display: inline-block;
|
|
}
|
|
.inner {
|
|
transform-origin: center center;
|
|
}
|
|
</style>
|