.circle-center { /*-------补全代码:使circle-center位于盒子中间--------*/
时间: 2024-04-24 14:18:22 浏览: 18
要使.circle-center位于盒子中间,可以使用以下CSS代码:
.circle-center {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
这样设置后,.circle-center元素将相对于其父元素垂直和水平居中显示。
相关问题
基于Vue的vue-circle-menu 实现菜单代码
Vue-Circle-Menu 是一个基于 Vue.js 的圆形菜单组件。以下是一个简单的实现示例:
```
<template>
<div class="circle-menu">
<vue-circle-menu :items="menuItems" @item-click="handleMenuClick"></vue-circle-menu>
</div>
</template>
<script>
import VueCircleMenu from 'vue-circle-menu';
export default {
components: {
VueCircleMenu,
},
data() {
return {
menuItems: [
{ icon: 'mdi-home', text: 'Home' },
{ icon: 'mdi-account', text: 'Profile' },
{ icon: 'mdi-settings', text: 'Settings' },
{ icon: 'mdi-logout', text: 'Logout' },
],
};
},
methods: {
handleMenuClick(item) {
console.log(item.text + ' clicked');
// 在这里可以根据不同的菜单项进行不同的操作
},
},
};
</script>
<style>
.circle-menu {
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
}
</style>
```
在上面的示例中,我们首先引入了 VueCircleMenu 组件,然后在组件中定义了一个 menuItems 数组,其中包含了四个菜单项,每个菜单项包括了一个图标和一个文本。
接着,我们在模板中使用 VueCircleMenu 组件,并将 menuItems 作为 props 传递给组件。同时,我们监听了组件的 item-click 事件,当用户点击菜单项时,会触发 handleMenuClick 方法。
在 handleMenuClick 方法中,我们可以根据传递过来的菜单项 item 进行不同的操作,比如跳转到对应的页面或执行某个函数等。
最后,我们还定义了一些样式,使圆形菜单居中显示在页面中央。
手动实现bowyer-watson算法的python代码
以下是基于Bowyer-Watson算法的Python代码实现:
```
import math
class Vertex:
def __init__(self, x, y):
self.x = x
self.y = y
def __eq__(self, other):
return self.x == other.x and self.y == other.y
def __hash__(self):
return hash((self.x, self.y))
class Triangle:
def __init__(self, vertex1, vertex2, vertex3):
self.vertices = [vertex1, vertex2, vertex3]
def __eq__(self, other):
return set(self.vertices) == set(other.vertices)
def __hash__(self):
return hash((self.vertices[0], self.vertices[1], self.vertices[2]))
def get_circumcenter(self):
A = self.vertices[0]
B = self.vertices[1]
C = self.vertices[2]
a = (B.x - A.x)**2 + (B.y - A.y)**2
b = (C.x - B.x)**2 + (C.y - B.y)**2
c = (A.x - C.x)**2 + (A.y - C.y)**2
s = 2 * (a * b + b * c + c * a) - (a**2 + b**2 + c**2)
px = (a * (b + c - a) * A.x + b * (c + a - b) * B.x + c * (a + b - c) * C.x) / s
py = (a * (b + c - a) * A.y + b * (c + a - b) * B.y + c * (a + b - c) * C.y) / s
return Vertex(px, py)
class DelaunayTriangulation:
def __init__(self, vertices):
self.vertices = vertices
self.triangles = []
# 计算超级三角形
max_x = max(vertex.x for vertex in self.vertices)
max_y = max(vertex.y for vertex in self.vertices)
min_x = min(vertex.x for vertex in self.vertices)
min_y = min(vertex.y for vertex in self.vertices)
dx = max(max_x - min_x, max_y - min_y)
mid_x = min_x + dx / 2
mid_y = min_y + dx / 2
self.super_triangle = Triangle(
Vertex(mid_x - 20 * dx, mid_y - dx),
Vertex(mid_x, mid_y + 20 * dx),
Vertex(mid_x + 20 * dx, mid_y - dx)
)
self.triangles.append(self.super_triangle)
# 插入所有的点
for vertex in self.vertices:
bad_triangles = []
for triangle in self.triangles:
if self.in_circumcircle(triangle, vertex):
bad_triangles.append(triangle)
polygon = []
for triangle in bad_triangles:
for v in triangle.vertices:
if v not in vertex and self.is_edge_shared_by_triangles(v, vertex, bad_triangles):
polygon.append((v, vertex))
for triangle in bad_triangles:
self.triangles.remove(triangle)
for edge in polygon:
self.triangles.append(Triangle(edge[0], edge[1], vertex))
def in_circumcircle(self, triangle, vertex):
circle_center = triangle.get_circumcenter()
radius = math.sqrt((circle_center.x - triangle.vertices[0].x)**2 + (circle_center.y - triangle.vertices[0].y)**2)
distance = math.sqrt((circle_center.x - vertex.x)**2 + (circle_center.y - vertex.y)**2)
return distance <= radius
def is_edge_shared_by_triangles(self, vertex1, vertex2, triangles):
edge_count = 0
for triangle in triangles:
if vertex1 in triangle.vertices and vertex2 in triangle.vertices:
edge_count += 1
return edge_count == 2
def get_triangles(self):
triangles = []
for triangle in self.triangles:
if not any(vertex in self.super_triangle.vertices for vertex in triangle.vertices):
triangles.append(triangle)
return triangles
```
该代码使用了三角形和顶点的类来表示数据,以及Bowyer-Watson算法来进行三角剖分。在主函数中,可以通过创建一个DelaunayTriangulation对象并传入一个顶点列表来获取三角形列表。