属性节点

属性节点。

属性 节点可获得物体或网格的属性信息。

输入项

该节点没有输入项。

属性

名称

Name of the attribute.

Type

Specifies the type of the attribute.

• Geometry

  The attribute is associated with the geometry of the object, and its value varies from vertex to vertex, or within the volume of the object.

  Most geometry attributes are directly accessible through the various input nodes, except for these:

  • Vertex Color Layers(顶点颜色层)

    可以通过他们的名字来检索。

    Density(密度)

    当该材质被用于一个域物体（物理模拟中被设置为流体域的物体）时，输出 流体域 内烟雾密度（浓度）的标量值。

    Color(颜色)

    当该材质被用于一个域物体时，输出 流体域 内烟雾的颜色。此时，颜色输出和矢量输出是相同的。而系数输出的则是各通道的平均值。

    Temperature(温度)

    输出体积内的温度值（标量）。输出的标量值介于0-1之间，对应0-1000K。该输出可通过黑体转换器节点或原理化体积着色器来渲染出基于物理的火焰。在该属性下，三个输出项的值都是相同的。

    Flame(火焰)

    输出 流体域 内火焰密度（浓度）的标量值。在该属性下，三个输出项的值都是相同的。

    Ocean Foam(海洋泡沫)

    Gives a scalar defining where foam might appear when using an Ocean Modifier. This depends on the name you give this property.

  See also

  想了解完整的属性名称列表，请查阅 此页面。

  Object

  The attribute name specifies a custom property name, or an RNA path to a built-in property (like the single property driver variables).

  The values of attributes of this type are defined once per object. The name or path is looked up first in the object data-block, followed by the mesh data-block if not found. Custom properties have priority over built-in ones.

  The property value must be an integer, float, or a vector of 1 to 4 floats; properties of other types are ignored. If a suitable property is not found, all sockets of the node, including Alpha, output 0.

  Tip

  The color attribute will output the value of the Color field in the Viewport Display panel of the object, unless overridden by a custom property.

  Instancer

  Similar to Object, but the attribute is looked up in the instancer particle system settings, followed by the instancer object. If the current object is not instanced, or the property is not found, it falls back to the Object mode.

输出

Color(颜色)

指定属性的RGB颜色输出。

矢量

指定属性的XYZ矢量输出。

系数

指定属性的标量输出。

Alpha

Alpha channel of the attribute, when available. If the attribute has no alpha channel, generally defaults to 1.

Note

Currently, attributes are not supported in shaders used for the World or Light Objects.