Instancing QML Type

Base type for instance tables. 更多...

import 语句：	import QtQuick3D
Since:	Qt 6.2
实例化：	QQuick3DInstancing
继承：	Object3D
继承者：	FileInstancing , InstanceList ，和 RandomInstancing

所有成员列表，包括继承成员

特性

方法

color instanceColor (int index ) (since 6.3)
vector3d instanceCustomData (int index ) (since 6.3)
vector3d instancePosition (int index ) (since 6.3)
quaternion instanceRotation (int index ) (since 6.3)
vector3d instanceScale (int index ) (since 6.3)

详细描述

实例化渲染 allows duplicating a model with variations.

The Instancing type defines a table that specifies how each instance is modified relative to the base model. The table has an entry for each index, containing a transform matrix, a color, and generic data for use by custom materials. To use instancing, set a model's instancing property to reference an Instancing object.

An application can define an Instancing object in C++ by subclassing QQuick3DInstancing , or it can use one of the pre-defined QML types: InstanceList FileInstancing ，或 RandomInstancing . In addition, it is possible to use a particle system to define an instancing table by using the ModelParticle3D.instanceTable 特性。

特性文档编制

depthSortingEnabled : bool

Holds the depth sorting enabled value for the instance table. When enabled, instances are sorted and rendered from the furthest instance from the camera to the nearest i.e. back-to-front. If disabled, which is the default, instances are rendered in the order they are specified in the instance table.

注意： The instances are only sorted against each other. Instances are not sorted against other objects in the scene.

注意： The sorting increases the frame preparation time especially with large instance counts.

hasTransparency : bool

Set this property to true if the instancing table contains alpha values that should be used when rendering the model. This property only makes a difference if the model is opaque: If the model has a transparent material ，或 opacity less than one, the alpha value from the table will be used regardless.

注意： Enabling alpha blending may cause rendering issues when instances overlap. See the alpha blending and instancing 文档编制了解细节。

instanceCountOverride : int

Set this property to limit the number of instances without regenerating or re-uploading the instance table. This allows very inexpensive animation of the number of instances rendered.