Fix for not assuming that origin position is 0,0,0

ugs-core/src/com/willwinder/universalgcodesender/gcode/GcodeState.java

@@ -80,7 +80,7 @@ public GcodeState() {
         this.feedRate = 0;
         this.spindleSpeed = 0;
 
-        this.currentPoint = new Position(0, 0, 0, Units.MM);
+        this.currentPoint = new Position(Double.NaN, Double.NaN, Double.NaN, Double.NaN, Double.NaN, Double.NaN, Units.MM);
     }
 
     public GcodeState copy() {

ugs-core/src/com/willwinder/universalgcodesender/gcode/processors/ArcExpander.java

@@ -44,9 +44,9 @@ This file is part of Universal Gcode Sender (UGS).
  * @author wwinder
  */
 public class ArcExpander implements CommandProcessor {
-    final private boolean convertToLines;
-    final private double length;
-    final private DecimalFormat df;
+    private final boolean convertToLines;
+    private final double length;
+    private final DecimalFormat df;
 
     @Override
     public String getHelp() {
@@ -105,6 +105,10 @@ public List<String> processCommand(String command, GcodeState state) throws Gcod
                 start, end, ps.center(), ps.isClockwise(),
                 ps.getRadius(), 0, this.length, new PlaneFormatter(ps.getPlaneState()));
 
+        if (points.isEmpty()) {
+            return results;
+        }
+
         // That function returns the first and last points. Exclude the first
         // point because the previous gcode command ends there already.
         points.remove(0);

ugs-core/src/com/willwinder/universalgcodesender/gcode/processors/RunFromProcessor.java

@@ -20,19 +20,19 @@ This file is part of Universal Gcode Sender (UGS).
 
 import com.google.common.collect.ImmutableList;
 import com.willwinder.universalgcodesender.gcode.GcodeParser;
+import static com.willwinder.universalgcodesender.gcode.GcodePreprocessorUtils.normalizeCommand;
 import com.willwinder.universalgcodesender.gcode.GcodeState;
 import com.willwinder.universalgcodesender.gcode.util.GcodeParserException;
 import com.willwinder.universalgcodesender.model.Position;
+import org.apache.commons.lang3.StringUtils;
 
 import java.util.Collections;
 import java.util.List;
 
-import static com.willwinder.universalgcodesender.gcode.GcodePreprocessorUtils.normalizeCommand;
-
 public class RunFromProcessor implements CommandProcessor {
     private int lineNumber;
     private GcodeParser parser;
-    private Double clearanceHeight = 0.0;
+    private Double clearanceHeight = 0.0d;
 
     /**
      * Truncates gcode to the specified line, and rewrites the preamble with the GcodeState.
@@ -67,11 +67,27 @@ public List<String> processCommand(String command, GcodeState state) throws Gcod
         return ImmutableList.of(command);
     }
 
-    private ImmutableList<String> getSkippedLinesState(String command) {
+    private List<String> getSkippedLinesState(String command) {
         Position pos = parser.getCurrentState().currentPoint;
-        String moveToClearanceHeight = "G0Z" + clearanceHeight;
-        String moveToXY = "G0X" + pos.x + "Y" + pos.y;
-        String plunge = "G1Z" + pos.z;
+
+        String moveToClearanceHeight = "";
+        if (!Double.isNaN(pos.z)) {
+            moveToClearanceHeight = "G0Z" + clearanceHeight;
+        }
+
+        String moveToXY = "G0";
+        if(!Double.isNaN(pos.x)) {
+            moveToXY += "X" + pos.x;
+        }
+
+        if(!Double.isNaN(pos.y)) {
+            moveToXY += "Y" + pos.y;
+        }
+
+        String plunge = "";
+        if (!Double.isNaN(pos.z)) {
+            plunge = "G1Z" + pos.z;
+        }
 
         GcodeState s = parser.getCurrentState();
         String normalized = command;
@@ -98,14 +114,16 @@ private ImmutableList<String> getSkippedLinesState(String command) {
 
                 // Append normalized command
                 normalized
-        );
+        ).stream()
+                .filter(line -> !StringUtils.isEmpty(line))
+                .toList();
     }
 
     private ImmutableList<String> skipLine(String command) throws GcodeParserException {
         createParser();
         parser.addCommand(command);
         Position pos = parser.getCurrentState().currentPoint;
-        clearanceHeight = Math.max(clearanceHeight, pos.z);
+        clearanceHeight = Math.max(clearanceHeight, Double.isNaN(pos.z) ? 0 :  pos.z);
         return ImmutableList.of();
     }
 

ugs-core/src/com/willwinder/universalgcodesender/model/GUIBackend.java

@@ -20,11 +20,11 @@ This file is part of Universal Gcode Sender (UGS).
 
 import com.google.common.io.Files;
 import com.willwinder.universalgcodesender.IController;
-import com.willwinder.universalgcodesender.gcode.ICommandCreator;
 import com.willwinder.universalgcodesender.gcode.DefaultCommandCreator;
 import com.willwinder.universalgcodesender.gcode.GcodeParser;
 import com.willwinder.universalgcodesender.gcode.GcodeState;
 import com.willwinder.universalgcodesender.gcode.GcodeStats;
+import com.willwinder.universalgcodesender.gcode.ICommandCreator;
 import com.willwinder.universalgcodesender.gcode.processors.CommandProcessor;
 import com.willwinder.universalgcodesender.gcode.processors.CommentProcessor;
 import com.willwinder.universalgcodesender.gcode.processors.DecimalProcessor;
@@ -102,6 +102,18 @@ public GUIBackend(UGSEventDispatcher eventDispatcher) {
     // GUI API //
     /////////////
 
+    /**
+     * This allows us to visualize a file without loading a controller profile.
+     */
+    private static void initializeWithFallbackProcessors(GcodeParser parser) {
+        // Comment processor must come first otherwise we try to parse codes
+        // out of the comments, like an f-code when we see "(feed rate is 100)"
+        parser.addCommandProcessor(new CommentProcessor());
+        parser.addCommandProcessor(new WhitespaceProcessor());
+        parser.addCommandProcessor(new M30Processor());
+        parser.addCommandProcessor(new DecimalProcessor(4));
+    }
+
     @Override
     public void addUGSEventListener(UGSEventListener listener) {
         eventDispatcher.addListener(listener);
@@ -227,18 +239,6 @@ public void applySettings(Settings settings) throws Exception {
         }
     }
 
-    /**
-     * This allows us to visualize a file without loading a controller profile.
-     */
-    private static void initializeWithFallbackProcessors(GcodeParser parser) {
-        // Comment processor must come first otherwise we try to parse codes
-        // out of the comments, like an f-code when we see "(feed rate is 100)"
-        parser.addCommandProcessor(new CommentProcessor());
-        parser.addCommandProcessor(new WhitespaceProcessor());
-        parser.addCommandProcessor(new M30Processor());
-        parser.addCommandProcessor(new DecimalProcessor(4));
-    }
-
     @Override
     public void sendGcodeCommand(String commandText) throws Exception {
         sendGcodeCommand(false, commandText);
@@ -316,6 +316,11 @@ public Position getWorkPosition() {
         return controller != null ? controller.getControllerStatus().getWorkCoord() : new Position(0, 0, 0, Units.MM);
     }
 
+    @Override
+    public void setWorkPosition(PartialPosition position) throws Exception {
+        controller.setWorkPosition(position);
+    }
+
     @Override
     public Position getMachinePosition() {
         return controller != null ? controller.getControllerStatus().getMachineCoord() : new Position(0, 0, 0, Units.MM);
@@ -347,17 +352,6 @@ private File getTempDir() {
         return tempDir;
     }
 
-    @Override
-    public void setGcodeFile(File file) throws Exception {
-        unsetGcodeFile();
-
-        logger.log(Level.INFO, "Setting gcode file. {0}", file.getAbsolutePath());
-
-        this.gcodeFile = file;
-        eventDispatcher.sendUGSEvent(new FileStateEvent(FileState.OPENING_FILE));
-        processGcodeFile();
-    }
-
     @Override
     public void unsetGcodeFile() throws Exception {
         if (gcodeStream != null) {
@@ -466,6 +460,17 @@ public File getGcodeFile() {
         return this.gcodeFile;
     }
 
+    @Override
+    public void setGcodeFile(File file) throws Exception {
+        unsetGcodeFile();
+
+        logger.log(Level.INFO, "Setting gcode file. {0}", file.getAbsolutePath());
+
+        this.gcodeFile = file;
+        eventDispatcher.sendUGSEvent(new FileStateEvent(FileState.OPENING_FILE));
+        processGcodeFile();
+    }
+
     @Override
     public File getProcessedGcodeFile() {
         logger.log(Level.FINEST, String.format("Getting processed gcode file (%s).", this.processedGcodeFile));
@@ -649,15 +654,15 @@ public void toggleCheckMode() throws Exception {
         this.controller.toggleCheckMode();
     }
 
+    ///////////////////////
+    // Utility functions //
+    ///////////////////////
+
     @Override
     public void issueSoftReset() throws Exception {
         this.controller.issueSoftReset();
     }
 
-    ///////////////////////
-    // Utility functions //
-    ///////////////////////
-
     @Override
     public void requestParserState() throws Exception {
         this.controller.viewParserState();
@@ -716,11 +721,6 @@ public ICommandCreator getCommandCreator() {
         return controller.getCommandCreator();
     }
 
-    @Override
-    public void setWorkPosition(PartialPosition position) throws Exception {
-        controller.setWorkPosition(position);
-    }
-
     @Override
     public void setWorkPositionUsingExpression(final Axis axis, final String expression) throws Exception {
         Units preferredUnits = getSettings().getPreferredUnits();

ugs-core/src/com/willwinder/universalgcodesender/visualizer/GcodeViewParse.java

@@ -125,7 +125,7 @@ public List<LineSegment> toObjFromReader(IGcodeStreamReader reader,
         GcodeParser gp = getParser();
 
         // Save the state
-        Position start = new Position(gp.getCurrentState().getUnits());
+        Position start = new Position(Double.NaN, Double.NaN, Double.NaN, Double.NaN, Double.NaN, Double.NaN, gp.getCurrentState().getUnits());
         double spindleSpeed = 0;
 
         while (reader.getNumRowsRemaining() > 0) {