Qt 3D Extras QML Types
自 Qt3D.Extras 6.8 起，该模块已被废弃。我们强烈建议不要在新代码中使用它。
要导入并使用该模块的 QML 类型，请使用以下语句：
import Qt3D.Extras 2.12允许从第一人称视角控制场景摄像机 | |
实现 Gooch 着色模型的材质，该模型在 CAD 和 CAM 应用中广受欢迎 | |
允许沿轨道路径控制场景摄像机 | |
用于渲染每个顶点所设颜色属性的默认实现 |
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