Clip coordinates in interleaved spatial queries to world boundaries.

common/coords.go

@@ -59,6 +59,23 @@ func maxComponent(a, b int16) int16 {
 	return b
 }
 
+func clipComponent(x int16) int16 {
+	if x < minValue {
+		return minValue
+	}
+	if x > maxValue {
+		return maxValue
+	}
+	return x
+}
+
+func ClipCoord(c Coord) Coord {
+	return Coord{
+		X: clipComponent(c.X),
+		Y: clipComponent(c.Y),
+		Z: clipComponent(c.Z)}
+}
+
 func MinCoord(a, b Coord) Coord {
 	return Coord{
 		X: minComponent(a.X, b.X),