www.spaceplanner.app

commit 64c178c17f9396af4c399d0ec128edcc205519ce
parent 9251fd6875b1e3bccc958ace1a5d7fe25ba03b16
Author: Jacob R. Edwards <jacob@jacobedwards.org>
Date:   Tue,  3 Sep 2024 10:19:57 -0700

Extend SVG.Circle with a vec() method

This uses the center of the circle rather than the corner like the
more general purpose vec function would do.

Diffstat:
M
files/floorplans/floorplan/geometry.js
 | 
16
++++++++++++++++

1 file changed, 16 insertions(+), 0 deletions(-)
diff --git a/files/floorplans/floorplan/geometry.js b/files/floorplans/floorplan/geometry.js
@@ -7,6 +7,12 @@ SVG.extend(SVG.Point, {
 	}
 })
 
+SVG.extend(SVG.Circle, {
+	vec: function() {
+		return new Vector2(this.cx(), this.cy())
+	}
+})
+
 SVG.extend(SVG.Shape, {
 	vec: function() {
 		return new Vector2(this.x(), this.y())
@@ -51,6 +57,16 @@ SVG.extend(SVG.Line, {
 		)
 	},
 
+	intersection: function(line2) {
+		let d = this.a * line2.b - line2.a * this.b;
+
+		return {
+			parallel: (d === 0),
+			x: (line2.b * this.c - this.b * line2.c) / d,
+			y: (this.a * line2.c - line2.a * this.c) / d
+		}
+	},
+
 	whereIsPoint: function(x, y) {
 		let p = new Vector2(x, y)
 		let width = this.attr("stroke-width") ?? 1