From 7523fb951aabc24bf290028c348cbe46bd846f86 Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Mon, 23 Jan 2012 22:22:02 +0000 Subject: graphing with raphael --- test/when/raphael-utils.js | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 test/when/raphael-utils.js (limited to 'test/when/raphael-utils.js') diff --git a/test/when/raphael-utils.js b/test/when/raphael-utils.js new file mode 100644 index 0000000..626713e --- /dev/null +++ b/test/when/raphael-utils.js @@ -0,0 +1,33 @@ +Raphael.fn.drawGrid = function (x, y, w, h, wv, hv, color) { + color = color || "#000"; + var path = ["M", Math.round(x) + .5, Math.round(y) + .5, "L", Math.round(x + w) + .5, Math.round(y) + .5, Math.round(x + w) + .5, Math.round(y + h) + .5, Math.round(x) + .5, Math.round(y + h) + .5, Math.round(x) + .5, Math.round(y) + .5], + rowHeight = h / hv, + columnWidth = w / wv; + for (var i = 1; i < hv; i++) { + path = path.concat(["M", Math.round(x) + .5, Math.round(y + i * rowHeight) + .5, "H", Math.round(x + w) + .5]); + } + for (i = 1; i < wv; i++) { + path = path.concat(["M", Math.round(x + i * columnWidth) + .5, Math.round(y) + .5, "V", Math.round(y + h) + .5]); + } + return this.path(path.join(",")).attr({stroke: color}); +}; + +function getAnchors(p1x, p1y, p2x, p2y, p3x, p3y) { + var l1 = (p2x - p1x) / 2, + l2 = (p3x - p2x) / 2, + a = Math.atan((p2x - p1x) / Math.abs(p2y - p1y)), + b = Math.atan((p3x - p2x) / Math.abs(p2y - p3y)); + a = p1y < p2y ? Math.PI - a : a; + b = p3y < p2y ? Math.PI - b : b; + var alpha = Math.PI / 2 - ((a + b) % (Math.PI * 2)) / 2, + dx1 = l1 * Math.sin(alpha + a), + dy1 = l1 * Math.cos(alpha + a), + dx2 = l2 * Math.sin(alpha + b), + dy2 = l2 * Math.cos(alpha + b); + return { + x1: p2x - dx1, + y1: p2y + dy1, + x2: p2x + dx2, + y2: p2y + dy2 + }; +} \ No newline at end of file -- cgit v1.2.3