is_within helper for Area

minetest-go · Aug 26, 2024 · 2efda00 · 2efda00
1 parent ada15f4
commit 2efda00
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diff --git 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
@@ -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))
 }