Usage
distance_2_point(x, y, rx, ry, sw, sh, ez, ex = as.numeric(c(0)), ey = as.numeric(c(0)))
Arguments
- x
- the horizontal coordinate of a point on a screen (pixels)
- y
- the vertical coordinate of a point on a screen (pixels)
- rx
- the horizontal resolution of the screen (pixels)
- ry
- the vertical resolution of the screen (pixels)
- sw
- the physical screen width (mm)
- sh
- the physical screen height (mm)
- ez
- the perpendicular distance from the viewer to the screen (mm)
- ex
- the horizontal offset of the viewer from screen center (mm)
- ey
- the vertical offset of the viewer from screen center (mm)
Description
Takes an x and y screen coordinate and returns the physical distance
from the observer to that point on the screen.
Examples
distance_2_point(840, 525, 1680, 1050, 473.76, 296.1, 750)
[1] 750