Let's try with the legancy function from ls 22..

Author: schwiti6190

scripts/specializations/CpShovelPositions.lua

@@ -417,7 +417,7 @@ function CpShovelPositions:setShovelPosition(dt, shovelLimits, armLimits, height
 		sy = yMin + 0.01
 		ey = yMin + 0.01
 	end
-	local hasIntersection, i1z, i1y, i2z, i2y = MathUtil.getCircleLineIntersection(
+	local hasIntersection, i1z, i1y, i2z, i2y = CpMathUtil.getCircleLineIntersection(
 		az, ay, radiusArmToolToShovelTool,
 		sz, sy, ez, ey)
 

scripts/util/CpMathUtil.lua

@@ -319,4 +319,28 @@ end
 --- Divide a by b, but instead of throwing an error when b is 0, return math.huge
 function CpMathUtil.divide(a, b)
 	return b == 0 and math.huge or a / b
-end
+end
+
+--- Legancy function form LS22
+function CpMathUtil.getCircleLineIntersection(circleX, circleZ, radius, lineStartX, lineStartZ, lineEndX, lineEndZ)
+	local p3x = lineStartX - circleX
+	local p3z = lineStartZ - circleZ
+	local p4x = lineEndX - circleX
+	local p4z = lineEndZ - circleZ
+	local m = (p4z - p3z) / (p4x - p3x)
+	local b = p3z - m * p3x
+	local dis = math.pow(radius, 2) * math.pow(m, 2) + math.pow(radius, 2) - math.pow(b, 2)
+
+	if dis < 0 then
+		return false
+	else
+		local t1 = (-m * b + math.sqrt(dis)) / (math.pow(m, 2) + 1)
+		local t2 = (-m * b - math.sqrt(dis)) / (math.pow(m, 2) + 1)
+		local intersect1X = t1 + circleX
+		local intersect1Z = m * t1 + b + circleZ
+		local intersect2X = t2 + circleX
+		local intersect2Z = m * t2 + b + circleZ
+
+		return true, intersect1X, intersect1Z, intersect2X, intersect2Z
+	end
+end