rmarkdown::render 不会渲染 rgl::plot3d 图形（但 Knit 按钮可以！）
请考虑以下示例：
---
title: "Untitled"
output:
pdf_document: default
---
```{r, setup}
Sys.setenv(CHROMOTE_CHROME = "C:\\Program Files (x86)\\Microsoft\\Edge\\Application\\msedge.exe")
options(rgl.useNULL = TRUE)
rgl::setupKnitr()
```
Plot:
```{r, rgl = TRUE, dev = "png"}
rgl::plot3d(rnorm(10), rnorm(10), rnorm(10))
```
运行 rmarkdown::render("temp.Rmd", output_format = "pdf_document") 会生成没有图形的 PDF。更有趣的是，点击 RStudio 中的 Knit 按钮会生成完美的 PDF！ （这本身很奇怪；我的印象是 Knit 按钮与上面的调用完全相同。）
Consider the following example:
---
title: "Untitled"
output:
pdf_document: default
---
```{r, setup}
Sys.setenv(CHROMOTE_CHROME = "C:\\Program Files (x86)\\Microsoft\\Edge\\Application\\msedge.exe")
options(rgl.useNULL = TRUE)
rgl::setupKnitr()
```
Plot:
```{r, rgl = TRUE, dev = "png"}
rgl::plot3d(rnorm(10), rnorm(10), rnorm(10))
```
Running rmarkdown::render("temp.Rmd", output_format = "pdf_document") produces a PDF with no figure. Even more interestingly, hitting the Knit button in RStudio produces a perfect PDF! (Which is quite strange itself; I was under the impression that the Knit button is exactly the same as the above call.)
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使用
rgl = TRUE与hook_rgl函数配合使用，这是在knitr中处理rgl的旧方法之一。它总是存在问题，因此最近的版本推荐了其他方法。使用 rgl::setupKnit(autoprint = TRUE) 是最简单的一种。它近似于基本绘图的行为：不会出现对绘图的细微更新，仅显示最终版本。如果您不希望这样，则可以将其保留为
autoprint = FALSE，并显式包含rglwidget()调用以显示绘图。自动打印并不完美，例如，一些生成 rgl 图的包不会以触发它的方式生成输出。您可以在
?rgl::setupKnit帮助主题中阅读有关此内容的更多信息。Using
rgl = TRUEworks with thehook_rglfunction, which is one of the older ways of handlingrglinknitr. It was always problematic, so recent releases have recommended other approaches instead.Using
rgl::setupKnitr(autoprint = TRUE)is the easiest one. It approximates the behaviour of base plotting: minor updates to a plot won't appear, only the final version is shown. If you don't want that, then you can leave it withautoprint = FALSE, and explicitly includerglwidget()calls to get a plot to appear.The auto-printing isn't perfect, e.g. some packages that produce
rglplots don't produce output in a way that will trigger it. You can read more about this in the?rgl::setupKnitrhelp topic.