fill-rule

The fill-rule этот атрибут представления, формулирует алгоритм, используемый для определения внутренней части фигуры.

Примечание: Атрибут представления, fill-rule может быть использован как CSS-свойство.

Как атрибут представления, он может быть применён к следующим восьми элементам:: <altGlyph>, <path>, <polygon>, <polyline> (en-US), <text>, <textPath> (en-US), <tref> (en-US), and <tspan> (en-US)

html,
body,
svg {
  height: 100%;
}

html

<svg viewBox="-10 -10 220 120" xmlns="http://www.w3.org/2000/svg">
  <!-- Default value for fill-rule -->
  <polygon
    fill-rule="nonzero"
    stroke="red"
    points="50,0 21,90 98,35 2,35 79,90" />

  <!--
  The center of the shape has two
  path segments (shown by the red stroke)
  between it and infinity. It is therefore
  considered outside the shape, and not filled.
  -->
  <polygon
    fill-rule="evenodd"
    stroke="red"
    points="150,0 121,90 198,35 102,35 179,90" />
</svg>

Примечания по использованию

Значение	`nonzero` \| `evenodd`
Значение по умолчанию	`nonzero`
Анимируемый	Да

The fill-rule attribute provides two options for how the inside (that is, the area to be filled) of a shape is determined:

The value nonzero determines the "insideness" of a point in the shape by drawing a ray from that point to infinity in any direction, and then examining the places where a segment of the shape crosses the ray. Starting with a count of zero, add one each time a path segment crosses the ray from left to right and subtract one each time a path segment crosses the ray from right to left. After counting the crossings, if the result is zero then the point is outside the path. Otherwise, it is inside.

Example

html,
body,
svg {
  height: 100%;
}

html

<svg viewBox="-10 -10 320 120" xmlns="http://www.w3.org/2000/svg">
  <!-- Effect of nonzero fill rule on crossing path segments -->
  <polygon
    fill-rule="nonzero"
    stroke="red"
    points="50,0 21,90 98,35 2,35 79,90" />

  <!--
  Effect of nonzero fill rule on a shape inside a shape
  with the path segment moving in the same direction
  (both squares drawn clockwise, to the "right")
  -->
  <path
    fill-rule="nonzero"
    stroke="red"
    d="M110,0  h90 v90 h-90 z
           M130,20 h50 v50 h-50 z" />

  <!--
  Effect of nonzero fill rule on a shape inside a shape
  with the path segment moving in the opposite direction
  (one square drawn clockwise, the other anti-clockwise)
  -->
  <path
    fill-rule="nonzero"
    stroke="red"
    d="M210,0  h90 v90 h-90 z
           M230,20 v50 h50 v-50 z" />
</svg>

evenodd

The value evenodd determines the "insideness" of a point in the shape by drawing a ray from that point to infinity in any direction and counting the number of path segments from the given shape that the ray crosses. If this number is odd, the point is inside; if even, the point is outside.

Example

html,
body,
svg {
  height: 100%;
}

html

<svg viewBox="-10 -10 320 120" xmlns="http://www.w3.org/2000/svg">
  <!-- Effect of evenodd fill rule on crossing path segments -->
  <polygon
    fill-rule="evenodd"
    stroke="red"
    points="50,0 21,90 98,35 2,35 79,90" />

  <!--
  Effect of evenodd fill rule on on a shape inside a shape
  with the path segment moving in the same direction
  (both squares drawn clockwise, to the "right")
  -->
  <path
    fill-rule="evenodd"
    stroke="red"
    d="M110,0  h90 v90 h-90 z
           M130,20 h50 v50 h-50 z" />

  <!--
  Effect of evenodd fill rule on a shape inside a shape
  with the path segment moving in opposite direction
  (one square drawn clockwise, the other anti-clockwise)
  -->
  <path
    fill-rule="evenodd"
    stroke="red"
    d="M210,0  h90 v90 h-90 z
           M230,20 v50 h50 v-50 z" />
</svg>

Browser compatibility

BCD tables only load in the browser

Specification

Specification	Status	Comment
Scalable Vector Graphics (SVG) 2 Определение 'fill-rule' в этой спецификации.	Кандидат в рекомендации	Definition for shapes and text
Scalable Vector Graphics (SVG) 1.1 (Second Edition) Определение 'fill-rule' в этой спецификации.	Рекомендация	Initial definition for shapes and text