makeframe: Display a single movie frame

In graphx: Graphics Routines for Scientific Research

Description

Displays a single movie-frame in the R-console, exactly as used in a movie generated with makemovie.

Usage

makeframe(
  frame.draw,
  frame.index,
  width = 1080,
  height = 720,
  keep.frame = FALSE
)

Arguments

frame.draw	function that plots an individual frame. This function must have exactly one argument 'x', which can be integer (e.g. a simple frame index) or real (e.g. a time).
frame.index	list of frame indices 'x' to be included in the movie
width	number of pixels along the horizontal axis
height	number of pixels along the vertical axis
keep.frame	logical flag specifying whether to keep the temporary png-file of the frame

Value

None

Author(s)

Danail Obreschkow

See Also

makemovie

Examples

## Example: Movie of a manual clock

# Function to draw a single clock face with two hands
frame = function(time) {
  par(mar=c(0,0,0,0))
  nplot(xlim=c(-1.1,1.1),ylim=c(-1.1,1.1),pty='s')
  plotrix::draw.circle(0,0,1,col='#aaaaff')
  radius = c(0.5,0.9)
  speed = 2*pi/c(720,60)
  lwd = c(4,2)
  graphics::arrows(0,0,radius*sin(speed*time),radius*cos(speed*time),lwd=lwd)
}

# Produce movie
## Not run: 
makeframe(frame,15,200,200)

## End(Not run)

graphx documentation built on Feb. 3, 2022, 5:07 p.m.