hangprinter: simplify things by turning unrolled stuff into loops

Author: jtimon

src/Movement/Kinematics/HangprinterKinematics.cpp

@@ -107,16 +107,15 @@ void HangprinterKinematics::Recalc() noexcept
 
 	// This is the difference between a "line length" and a "line position"
 	// "line length" == ("line position" + "line length in origin")
-	lineLengthsOrigin[A_AXIS] = fastSqrtf(fsquare(anchors[A_AXIS][0]) + fsquare(anchors[A_AXIS][1]) + fsquare(anchors[A_AXIS][2]));
-	lineLengthsOrigin[B_AXIS] = fastSqrtf(fsquare(anchors[B_AXIS][0]) + fsquare(anchors[B_AXIS][1]) + fsquare(anchors[B_AXIS][2]));
-	lineLengthsOrigin[C_AXIS] = fastSqrtf(fsquare(anchors[C_AXIS][0]) + fsquare(anchors[C_AXIS][1]) + fsquare(anchors[C_AXIS][2]));
-	lineLengthsOrigin[D_AXIS] = fastSqrtf(fsquare(anchors[D_AXIS][0]) + fsquare(anchors[D_AXIS][1]) + fsquare(anchors[D_AXIS][2]));
-
+	for (size_t i = 0; i < HANGPRINTER_AXES; ++i)
+	{
+		lineLengthsOrigin[i] = fastSqrtf(fsquare(anchors[i][0]) + fsquare(anchors[i][1]) + fsquare(anchors[i][2]));
+	}
 
 	// Line buildup compensation
 	float stepsPerUnitTimesRTmp[HANGPRINTER_AXES] = { 0.0 };
 	Platform& platform = reprap.GetPlatform(); // No const because we want to set drive steper per unit
-	for (size_t i = 0; i < HANGPRINTER_AXES; i++)
+	for (size_t i = 0; i < HANGPRINTER_AXES; ++i)
 	{
 		const uint8_t driver = platform.GetAxisDriversConfig(i).driverNumbers[0].localDriver; // Only supports single driver
 		bool dummy;
@@ -275,22 +274,15 @@ bool HangprinterKinematics::CartesianToMotorSteps(const float machinePos[], cons
 													size_t numVisibleAxes, size_t numTotalAxes, int32_t motorPos[], bool isCoordinated) const noexcept
 {
 	float squaredLineLengths[HANGPRINTER_AXES];
-	squaredLineLengths[A_AXIS] = LineLengthSquared(machinePos, anchors[A_AXIS]);
-	squaredLineLengths[B_AXIS] = LineLengthSquared(machinePos, anchors[B_AXIS]);
-	squaredLineLengths[C_AXIS] = LineLengthSquared(machinePos, anchors[C_AXIS]);
-	squaredLineLengths[D_AXIS] = LineLengthSquared(machinePos, anchors[D_AXIS]);
-
 	float linePos[HANGPRINTER_AXES];
+
 	for (size_t i = 0; i < HANGPRINTER_AXES; ++i)
 	{
+		squaredLineLengths[i] = LineLengthSquared(machinePos, anchors[i]);
 		linePos[i] = fastSqrtf(squaredLineLengths[i]) - lineLengthsOrigin[i];
+		motorPos[i] = lrintf(k0[i] * (fastSqrtf(spoolRadiiSq[i] + linePos[i] * k2[i]) - spoolRadii[i]));
 	}
 
-	motorPos[A_AXIS] = lrintf(k0[A_AXIS] * (fastSqrtf(spoolRadiiSq[A_AXIS] + linePos[A_AXIS] * k2[A_AXIS]) - spoolRadii[A_AXIS]));
-	motorPos[B_AXIS] = lrintf(k0[B_AXIS] * (fastSqrtf(spoolRadiiSq[B_AXIS] + linePos[B_AXIS] * k2[B_AXIS]) - spoolRadii[B_AXIS]));
-	motorPos[C_AXIS] = lrintf(k0[C_AXIS] * (fastSqrtf(spoolRadiiSq[C_AXIS] + linePos[C_AXIS] * k2[C_AXIS]) - spoolRadii[C_AXIS]));
-	motorPos[D_AXIS] = lrintf(k0[D_AXIS] * (fastSqrtf(spoolRadiiSq[D_AXIS] + linePos[D_AXIS] * k2[D_AXIS]) - spoolRadii[D_AXIS]));
-
 	return true;
 }
 
@@ -587,10 +579,12 @@ void HangprinterKinematics::ForwardTransform(float const a, float const b, float
 // Print all the parameters for debugging
 void HangprinterKinematics::PrintParameters(const StringRef& reply) const noexcept
 {
-	reply.printf("Anchor coordinates (%.2f,%.2f,%.2f) (%.2f,%.2f,%.2f) (%.2f,%.2f,%.2f)\n",
-					(double)anchors[A_AXIS][X_AXIS], (double)anchors[A_AXIS][Y_AXIS], (double)anchors[A_AXIS][Z_AXIS],
-					(double)anchors[B_AXIS][X_AXIS], (double)anchors[B_AXIS][Y_AXIS], (double)anchors[B_AXIS][Z_AXIS],
-					(double)anchors[C_AXIS][X_AXIS], (double)anchors[C_AXIS][Y_AXIS], (double)anchors[C_AXIS][Z_AXIS]);
+	reply.printf("Anchor coordinates");
+	for (size_t i = 0; i < HANGPRINTER_AXES; ++i)
+	{
+		reply.printf(" (%.2f,%.2f,%.2f)", (double)anchors[i][X_AXIS], (double)anchors[i][Y_AXIS], (double)anchors[i][Z_AXIS]);
+	}
+	reply.printf("\n");
 }
 
 #if DUAL_CAN