dsegments: Draw Segments

In ablejec/animatoR: Support for Animated Graphics in Base R Graphics

Description

Draw segments from (x_0,y_0) to (x_1,y_1). The effect is like starting from a point and draw a line.

Usage

dsegments(x0, y0, x1, y1, t, when, p = 1, ...)

Arguments

x0	numeric vector, start x coordinates.
y0	numeric vector, start y coordinates.
x1	numeric vector, end x coordinates.
y1	numeric vector, end y coordinates.
t	numeric, homotopy parameter, limited between 0 and 1. This parameter can be considered as fraction of animation duration time.
when	numeric vector. This parameter controls the times of: entrance, exit, start of movement and, end of movement.
p	numeric, homotopy power parameter. Defaults to 1.
...	additional arguments passed to segments.

Value

List with numerical components x and y giving current position.

Author(s)

Andrej Blejec [e-mail]

See Also

segments, tsegments for moving segments and darrows for drawing arrows.

Examples

x0 <- c(0,5,10)
y0 <- c(0,10,0)
x1 <- c(10,5,0)
y1 <- c(10,0,10)
newplot()
pos <- dsegments(x0,y0,x1,y1,0.25)
points(pos)
## Lines from 0 to 1
par(mfrow=c(2,2))
for( t in seq(0,1,1/3)) {
newplot()
dsegments(x0,y0,x1,y1,t)
points(x0,y0,pch="0")
points(x1,y1,pch="1")
}
## Reverse: from 1 to 0
par(mfrow=c(2,2))
for( t in seq(0,1,1/3)) {
newplot()
dsegments(x1,y1,x0,y0,t)
points(x0,y0,pch="0")
points(x1,y1,pch="1")
}

ablejec/animatoR documentation built on Feb. 21, 2020, 10:09 p.m.