coordinatesBetweenRectangles: Calculate coordinates of line between bounding boxes.
In rjbgoudie/parental: Light-weight graph package

Description Usage Arguments Details Value

We have points (x1, y1) and (x2, y2) in Cartesian space. We wish to draw a line between these two points.

1 2	coordinatesBetweenRectangles(x1, y1, x2, y2, w1, h1, w2, h2)

`x1`	The x-coordinate of the first point
`y1`	The y-coordinate of the first point
`x2`	The x-coordinate of the second point
`y2`	The y-coordinate of the second point
`w1`	The width of the bounding box around `(x1, y1)`
`h1`	The height of the bounding box around `(x1, y1)`
`w2`	The width of the bounding box around `(x2, y2)`
`h2`	The height of the bounding box around `(x1, y1)`

However, these two points have rectangles centred around them. The first point has a rectangle width w1 and height h1 drawn around it; the second has a rectangle with w2 and height h2 drawn around it. Note that the vertices of the first rectangle are (x1-w1/2, x1+h1/2), (x1+w1/2, x1+h1/2), (x1+w1/2, x1-h1/2) (x1-w1/2, x1-h1/2).

This function returns the coordinates of the points on which the line drawn between the two points intersects with each bounding box.

A numeric vector of length 4. The first two are the x- and y-coordinates on the bounding box of (x1, y1). The third and fourth are the x- and y-coordinates on the bounding box of (x2, y2)

rjbgoudie/parental documentation built on May 27, 2019, 9:11 a.m.