---
title: "Hand demo"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Hand Demo}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---


```{r, include = FALSE}
library(mypaintr)
knitr::knit_hooks$set(mypaint = knitr_mypaint_hook(res = 288))

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  fig.ext = "png",
  fig.width = 7,
  fig.height = 5,
  out.width = "100%",
  fig.keep = "none",
  mypaint = TRUE
)
```

```{r}
plot_with_hand <- function(...) {
  null <- length(list(...)) &&is.null(list(...)[[1]])
  title <- deparse(substitute(list(...)))
  title <- if (! null) {
    sub("list\\((.*)\\)",  "human_hand(\\1)", title) 
  } else {
    "NULL"
  }
  plot.new()
  plot.window(c(0, 10), c(0, 10))
  title(title)
  
  set_brush(NULL)
  if (null)
    hand <- NULL
  else 
    hand <- human_hand(seed = 1, ...)
  set_hand(hand)
  rect(1, 1, 4, 4)
  draw_rough_rect(6, 6, 9, 9, col = "green4", hand = hand)
  draw_rough_rect(1, 6, 4, 9, col = "darkred",
                  fill_pattern = zigzag(),
                  hand = hand)
  draw_rough_rect(6, 1, 9, 4, lwd = 2, border = "navy",
                  col = "slateblue3", 
                  fill_pattern = jumble(density = 12), 
                  hand = hand)
  arrows(1, 5, 9, 5, lwd = 6)
}
```

```{r}
plot_with_hand(NULL)
```


```{r}
plot_with_hand()
```


```{r}
plot_with_hand(bow = 0)
```


```{r}
plot_with_hand(wobble = 0)
```


```{r}
plot_with_hand(multi_stroke = 2)
```


```{r}
plot_with_hand(width_jitter = 0.24, multi_stroke = 2)
```


```{r}
plot_with_hand(endpoint_jitter = 0)
```

```{r}
plot_with_hand(endpoint_jitter = 0.02)
```

# Pressure on the default device

```{r}

plot_with_hand(pressure = pressure_flat(0.5))
```

```{r}
plot_with_hand(pressure = pressure_smooth())
```

# Pressure using `mypaint_device()` and brushes

```{r, mypaint=TRUE, fig.keep="none"}
set_brush("classic/pen")
plot_with_hand(pressure = pressure_flat())
```

```{r, mypaint=TRUE, fig.keep="none"}
set_brush("classic/pen")
plot_with_hand(pressure = pressure_smooth())
```

```{r, mypaint=TRUE, fig.keep="none"}
set_brush("ramon/Marker")
plot_with_hand(pressure = pressure_flat())
```

```{r, mypaint=TRUE, fig.keep="none"}
set_brush("ramon/Marker")
plot_with_hand(pressure = pressure_smooth())
```

```{r, mypaint=TRUE, fig.keep="none"}
set_brush("ramon/Marker")
plot_with_hand(pressure = pressure_human())
```