From 2efda003ff425f76fd61b4ba18861ca6a25f556e Mon Sep 17 00:00:00 2001
From: BuckarooBanzay <BuckarooBanzay@users.noreply.github.com>
Date: Mon, 26 Aug 2024 15:59:55 +0200
Subject: [PATCH] is_within helper for Area

---
 area.go      | 14 ++++++++++++++
 area_test.go |  8 ++++++++
 2 files changed, 22 insertions(+)

diff --git a/area.go b/area.go
index aedc99f..dcb1d39 100644
--- a/area.go
+++ b/area.go
@@ -33,3 +33,17 @@ func (a *Area) Corners() []*Pos {
 		{a.Pos2.X(), a.Pos2.Y(), a.Pos1.Z()},
 	}
 }
+
+func (a *Area) Intersects(a2 *Area) bool {
+	for _, p1 := range a.Corners() {
+		if p1.IsWithin(a2.Pos1, a2.Pos2) {
+			return true
+		}
+	}
+	for _, p2 := range a2.Corners() {
+		if p2.IsWithin(a.Pos1, a.Pos2) {
+			return true
+		}
+	}
+	return false
+}
diff --git a/area_test.go b/area_test.go
index cc5e3f4..36174f6 100644
--- a/area_test.go
+++ b/area_test.go
@@ -23,4 +23,12 @@ func TestArea(t *testing.T) {
 		assert.False(t, visited[p.String()])
 		visited[p.String()] = true
 	}
+
+	a2 := types.NewArea(types.NewPos(0, 0, 0), types.NewPos(1, 2, 3))
+	assert.True(t, a2.Intersects(a))
+	assert.True(t, a.Intersects(a2))
+
+	a2 = types.NewArea(types.NewPos(0, 0, 0), types.NewPos(1, 1, 1))
+	assert.False(t, a2.Intersects(a))
+	assert.False(t, a.Intersects(a2))
 }