R/find.cat.pos.R

In VennDiagram: Generate High-Resolution Venn and Euler Plots

# The VennDiagram package is copyright (c) 2012 Ontario Institute for Cancer Research (OICR)
# This package and its accompanying libraries is free software; you can redistribute it and/or modify it under the terms of the GPL
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# function to find the position of category names
find.cat.pos <- function(x, y, pos, dist, r = NULL) {

	if (is.null(r)) {
		cat.x <- dist * sin(pos * pi / 180) + x;
		cat.y <- dist * cos(pos * pi / 180) + y;
		}
	else {
		cat.x <- (r + dist) * sin(pos * pi / 180) + x;
		cat.y <- (r + dist) * cos(pos * pi / 180) + y;
		}

	return(
		list(
			x = cat.x,
			y = cat.y
			)
		);
	}