add brushesmain

2 files changed, 9 insertions, 2 deletions

diff --git a/src/modules/Geometry.js b/src/modules/Geometry.js
index 628512b..43f277f 100644
--- a/src/modules/Geometry.js
+++ b/src/modules/Geometry.js
@@ -1,5 +1,9 @@
 'use strict';
 
+function dist(a, b) {
+	return Math.sqrt((a.x - b.x)**2 + (a.y - b.y)**2);
+}
+
 /* AABB - axis-aligned bounding box */
 class AABB {
 	/* create a new AABB */
@@ -226,4 +230,4 @@ class QuadTree {
 	}
 }
 
-export { AABB, QTNode, QuadTree };
+export { dist, AABB, QTNode, QuadTree };
diff --git a/src/modules/Util.js b/src/modules/Util.js
index 2375f10..165d1d0 100644
--- a/src/modules/Util.js
+++ b/src/modules/Util.js
@@ -14,4 +14,7 @@ function clamp(value, min, max) {
 	return Math.min(Math.max(value, min), max);
 }
 
-export { useAverage, clamp };
+function lerp(a, b, alpha) {
+	return ((1-alpha)*a) + (alpha*b);
+}
+export { useAverage, clamp, lerp };