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Universal Gcode Sender Library
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/*
* Gcode parser that creates an array of line segments which can be drawn.
*
* Created on Jan 29, 2013
*/
/*
Copyright 2013-2017 Noah Levy, William Winder
This file is part of Universal Gcode Sender (UGS).
UGS is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
UGS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with UGS. If not, see lines;
// Debug
private final boolean debug = true;
public GcodeViewParse()
{
min = new Position();
max = new Position();
lines = new ArrayList<>();
}
public Position getMinimumExtremes()
{
return min;
}
public Position getMaximumExtremes()
{
return max;
}
/**
* Test a point and update min/max coordinates if appropriate.
*/
private void testExtremes(final Position p3d)
{
testExtremes(p3d.x, p3d.y, p3d.z);
}
/**
* Test a point and update min/max coordinates if appropriate.
*/
private void testExtremes(double x, double y, double z)
{
if(x < min.x) {
min.x = x;
}
if(x > max.x) {
max.x = x;
}
if(y < min.y) {
min.y = y;
}
if(y > max.y) {
max.y = y;
}
if(z < min.z) {
min.z = z;
}
if(z > max.z) {
max.z = z;
}
}
/**
* Create a gcode parser with required configuration.
*/
private static GcodeParser getParser(double arcSegmentLength) {
GcodeParser gp = new GcodeParser();
gp.addCommandProcessor(new CommentProcessor());
gp.addCommandProcessor(new WhitespaceProcessor());
//gp.addCommandProcessor(new ArcExpander(true, arcSegmentLength, 4));
return gp;
}
/**
* Almost the same as toObjRedux, convert gcode to a LineSegment collection.
* I've tried refactoring this, but the function is so small that merging
* toObjFromReader and toObjRedux adds more complexity than having these two
* methods.
*
* @param gcode commands to visualize.
* @param arcSegmentLength length of line segments when expanding an arc.
*/
public List toObjFromReader(GcodeStreamReader reader,
double arcSegmentLength) throws IOException, GcodeParserException {
lines.clear();
GcodeParser gp = getParser(arcSegmentLength);
// Save the state
Position start = new Position();
while (reader.getNumRowsRemaining() > 0) {
GcodeCommand commandObject = reader.getNextCommand();
List commands = gp.preprocessCommand(commandObject.getCommandString(), gp.getCurrentState());
for (String command : commands) {
List points = gp.addCommand(command, commandObject.getCommandNumber());
for (GcodeMeta meta : points) {
if (meta.point != null) {
addLinesFromPointSegment(start, meta.point, arcSegmentLength, lines);
start.set(meta.point.point());
}
}
}
}
return lines;
}
/**
* The original (working) gcode to LineSegment collection code.
* @param gcode commands to visualize.
* @param arcSegmentLength length of line segments when expanding an arc.
*/
public List toObjRedux(List gcode, double arcSegmentLength) throws GcodeParserException {
GcodeParser gp = getParser(arcSegmentLength);
lines.clear();
// Save the state
Position start = new Position();
for (String s : gcode) {
List commands = gp.preprocessCommand(s, gp.getCurrentState());
for (String command : commands) {
List points = gp.addCommand(command);
for (GcodeMeta meta : points) {
if (meta.point != null) {
addLinesFromPointSegment(start, meta.point, arcSegmentLength, lines);
start.set(meta.point.point());
}
}
}
}
return lines;
}
/**
* Turns a point segment into one or more LineSegment. Arcs are expanded.
* Keeps track of the minimum and maximum x/y/z locations.
*/
private List addLinesFromPointSegment(final Position start, final PointSegment endSegment, double arcSegmentLength, List ret) {
// For a line segment list ALL arcs must be converted to lines.
double minArcLength = 0;
LineSegment ls;
endSegment.convertToMetric();
Position end = new Position(endSegment.point());
// start is null for the first iteration.
if (start != null) {
// Expand arc for graphics.
if (endSegment.isArc()) {
List points =
GcodePreprocessorUtils.generatePointsAlongArcBDring(
start, end, endSegment.center(), endSegment.isClockwise(),
endSegment.getRadius(), minArcLength, arcSegmentLength, new PlaneFormatter(endSegment.getPlaneState()));
// Create line segments from points.
if (points != null) {
Position startPoint = start;
for (Position nextPoint : points) {
ls = new LineSegment(startPoint, nextPoint, endSegment.getLineNumber());
ls.setIsArc(endSegment.isArc());
ls.setIsFastTraverse(endSegment.isFastTraverse());
ls.setIsZMovement(endSegment.isZMovement());
this.testExtremes(nextPoint);
ret.add(ls);
startPoint = nextPoint;
}
}
// Line
} else {
ls = new LineSegment(start, end, endSegment.getLineNumber());
ls.setIsArc(endSegment.isArc());
ls.setIsFastTraverse(endSegment.isFastTraverse());
ls.setIsZMovement(endSegment.isZMovement());
this.testExtremes(end);
ret.add(ls);
}
}
return ret;
}
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