---
title: "Gallery of Effects"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Gallery of Effects}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)
```

```{r setup}
library(sparkler)
```

This vignette demonstrates the visual effects available in `sparkler`.

The package includes two types of effects:

-   weather effects such as snow, rain, and meteors, which can be rendered inline or as a full-screen overlay

-   celebration effects such as confetti and fireworks, which are typically used as overlays in presentations, dashboards, and Shiny apps

These effects are rendered using HTML5 Canvas.

## Weather effects

Use `sparkler::weather()` to create ambient backgrounds. By default in R Markdown, these render in a contained box.

### Snow

```{r snow, echo=TRUE}
sparkler::weather(type = "snow", density = 2, fullscreen = FALSE, height = "300px")
```

### Rain

```{r rain, echo=TRUE}
sparkler::weather(type = "rain", density = 1, speed = 0.8, height = "300px")
```

### Meteors

```{r meteor, echo=TRUE}
sparkler::weather(type = "meteor", density = 1, height = "300px")
```

## Celebration effects

`confetti()` and `fireworks()` are designed primarily for celebratory overlays. In documents, they are triggered when the widget is rendered. In presentation formats such as Quarto revealjs, they are especially useful on slides where the effect should appear when the slide becomes active.

### Confetti

```{r confetti, echo=TRUE}
sparkler::confetti(particle_count = 100, spread = 170)
```

### Fireworks

```{r fireworks, echo=TRUE}
sparkler::fireworks(duration = 10, speed = 1)
```

## Notes on usage

-   Use `weather(..., fullscreen = FALSE)` when you want the effect contained inside a region of the page.
-   Use `weather(..., fullscreen = TRUE)` when you want a full-screen overlay. A dark background is recommended so the effect is easier to see.
-   `confetti()` and `fireworks()` are best suited to presentations and interactive applications such as Shiny.
-   In Quarto/R Markdown revealjs presentations, celebration effects can be placed on a slide and triggered when that slide becomes active.