Examples of java.awt.geom.PathIterator

java.awt.geom.PathIterator
The PathIterator interface provides the mechanism for objects that implement the {@link java.awt.Shape Shape}interface to return the geometry of their boundary by allowing a caller to retrieve the path of that boundary a segment at a time. This interface allows these objects to retrieve the path of their boundary a segment at a time by using 1st through 3rd order Bézier curves, which are lines and quadratic or cubic Bézier splines.
Multiple subpaths can be expressed by using a "MOVETO" segment to create a discontinuity in the geometry to move from the end of one subpath to the beginning of the next.
Each subpath can be closed manually by ending the last segment in the subpath on the same coordinate as the beginning "MOVETO" segment for that subpath or by using a "CLOSE" segment to append a line segment from the last point back to the first. Be aware that manually closing an outline as opposed to using a "CLOSE" segment to close the path might result in different line style decorations being used at the end points of the subpath. For example, the {@link java.awt.BasicStroke BasicStroke} object uses a line "JOIN" decoration to connect the first and last points if a "CLOSE" segment is encountered, whereas simply ending the path on the same coordinate as the beginning coordinate results in line "CAP" decorations being used at the ends. @see java.awt.Shape @see java.awt.BasicStroke @version 1.17, 11/17/05 @author Jim Graham

                return;
            }
        }


        //PathIterator iter = s.getPathIterator(getTransform());
        PathIterator iter = s.getPathIterator(IDENTITY_TRANSFORM);
        processPathIterator(iter);
        doDrawing(true, false,
                  iter.getWindingRule() == PathIterator.WIND_EVEN_ODD);
        if (newClip || newTransform) {
            currentStream.write("Q\n");
            graphicsState.pop();
        }
    }

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            if (!clip.getBounds().contains(bounds)) {
                return;
            }
        }


        PathIterator it = shape.getPathIterator(transform);
        double[] prev = null;
        double[] coords = new double[6];
        double[] first = new double[6];
        if(!it.isDone()) it.currentSegment(first); //first point
        while(!it.isDone()){
            int type = it.currentSegment(coords);
            if (prev != null ){
                Line line = new Line(group);
                if (stroke instanceof BasicStroke){
                    BasicStroke bs = (BasicStroke)stroke;
                    line.setLineWidth(bs.getLineWidth());
                    float[] dash = bs.getDashArray();
                    if (dash != null) line.setLineDashing(Line.PEN_DASH);
                }
                if(getColor() != null) line.setLineColor(getColor());
                if (type == PathIterator.SEG_LINETO) {
                    line.setAnchor(new java.awt.Rectangle((int)prev[0],  (int)prev[1], (int)(coords[0] - prev[0]), (int)(coords[1] - prev[1])));
                } else if (type == PathIterator.SEG_CLOSE){
                    line.setAnchor(new java.awt.Rectangle((int)coords[0],  (int)coords[1], (int)(first[0] - coords[0]), (int)(first[1] - coords[1])));
                }
                group.addShape(line);
            }
            prev = new double[]{coords[0],  coords[1]};
            it.next();
        }


    }

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            if (bounds.height == 0) bounds.height = 1;
             if (!clip.getBounds().contains(bounds)) {
                return;
            }
        }
        PathIterator it = shape.getPathIterator(transform);
        ArrayList pnt = new ArrayList();
        double[] coords = new double[6];
        while(!it.isDone()){
            int type = it.currentSegment(coords);
            if (type != PathIterator.SEG_CLOSE) {
                pnt.add(new Point((int)coords[0], (int)coords[1]));
            }
            it.next();
        }
        int[] xPoints= new int[pnt.size()];
        int[] yPoints= new int[pnt.size()];
        for (int i = 0; i < pnt.size(); i++) {
            Point p = (Point)pnt.get(i);

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     * Builds a proxy <tt>GraphicsNode</tt> for the input <tt>Marker</tt> to be
     * drawn at the start position 
     */
    protected ProxyGraphicsNode buildStartMarkerProxy() {


        PathIterator iter = getShape().getPathIterator(null);


        // Get initial point on the path
        double coords[] = new double[6];
        int segType = 0;


        if (iter.isDone()) {
            return null;
        }


        segType = iter.currentSegment(coords);
        if (segType != iter.SEG_MOVETO) {
            return null;
        }
        iter.next();


        Point2D markerPosition = new Point2D.Double(coords[0], coords[1]);


        // If the marker's orient property is NaN,
        // the slope needs to be computed
        double rotation = startMarker.getOrient();
        if (Double.isNaN(rotation)) {
            if (!iter.isDone()) {
                double next[] = new double[6];
                int nextSegType = 0;
                nextSegType = iter.currentSegment(next);
                if(nextSegType == PathIterator.SEG_CLOSE){
                    nextSegType = PathIterator.SEG_LINETO;
                    next[0] = coords[0];
                    next[1] = coords[1];
                }

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     * Builds a proxy <tt>GraphicsNode</tt> for the input <tt>Marker</tt> to be
     * drawn at the end position.
     */
    protected ProxyGraphicsNode buildEndMarkerProxy() {


        PathIterator iter = getShape().getPathIterator(null);


        int nPoints = 0;


        // Get first point, in case the last segment on the
        // path is a close
        if (iter.isDone()) {
            return null;
        }
  
        double coords[] = new double[6];
        double moveTo[] = new double[2];
        int segType = 0;
        segType = iter.currentSegment(coords);
        if (segType != iter.SEG_MOVETO) {
            return null;
        }
        nPoints++;
        moveTo[0] = coords[0];
        moveTo[1] = coords[1];


        iter.next();
        
        // Now, get the last two points on the path
        double[] lastButOne = new double[6];
        double[] last = {coords[0], coords[1], coords[2],
                         coords[3], coords[4], coords[5] }, tmp = null;
        int lastSegType = segType;
        int lastButOneSegType = 0;


        while (!iter.isDone()) {
            tmp = lastButOne;
            lastButOne = last;
            last = tmp;
            lastButOneSegType = lastSegType;


            lastSegType = iter.currentSegment(last);


            if (lastSegType == PathIterator.SEG_MOVETO) {
                moveTo[0] = last[0];
                moveTo[1] = last[1];
            } else if (lastSegType == PathIterator.SEG_CLOSE) {
                lastSegType = PathIterator.SEG_LINETO;
                last[0] = moveTo[0];
                last[1] = moveTo[1];
            }


            iter.next();
            nPoints++;
        }


        if (nPoints < 2) {
            return null;

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     * Builds a proxy <tt>GraphicsNode</tt> for the input <tt>Marker</tt> to be
     * drawn at the middle positions 
     */
    protected ProxyGraphicsNode[] buildMiddleMarkerProxies() {


        PathIterator iter = getShape().getPathIterator(null);


        double[] prev = new double[6];
        double[] cur = new double[6];
        double[] next = new double[6], tmp = null;
        int prevSegType = 0, curSegType = 0, nextSegType = 0;


        // Get the first three points on the path
        if (iter.isDone()) {
            return null;
        }


        prevSegType = iter.currentSegment(prev);
        double[] moveTo = new double[2];


        if (prevSegType != PathIterator.SEG_MOVETO) {
            return null;
        }


        moveTo[0] = prev[0];
        moveTo[1] = prev[1];
        iter.next();


        if (iter.isDone()) {
            return null;
        }
  
        curSegType = iter.currentSegment(cur);


        if (curSegType == PathIterator.SEG_MOVETO) {
            moveTo[0] = cur[0];
            moveTo[1] = cur[1];
        } else if (curSegType == PathIterator.SEG_CLOSE) {
            curSegType = PathIterator.SEG_LINETO;
            cur[0] = moveTo[0];
            cur[1] = moveTo[1];
        }


        iter.next();


        Vector proxies = new Vector();
        while (!iter.isDone()) {
            nextSegType = iter.currentSegment(next);


            if (nextSegType == PathIterator.SEG_MOVETO) {
                moveTo[0] = next[0];
                moveTo[1] = next[1];
            } else if (nextSegType == PathIterator.SEG_CLOSE) {
                nextSegType = PathIterator.SEG_LINETO;
                next[0] = moveTo[0];
                next[1] = moveTo[1];
            }
      
            proxies.addElement(createMiddleMarker(prev, prevSegType,
                                                  cur, curSegType,
                                                  next, nextSegType));
            
            tmp = prev;
            prev = cur;
            prevSegType = curSegType;
            cur = next;
            curSegType = nextSegType;
            next = tmp;
            
            iter.next();
        }


        ProxyGraphicsNode [] gn = new ProxyGraphicsNode[proxies.size()];
        proxies.copyInto(gn);

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                    // isn't met we are SOL.
                    float [] pts = new float[6];
                    int count = 0;
                    int type = -1;


                    PathIterator pi = gbounds.getPathIterator(null);
                    Point2D.Float firstPt = null;
                    if (isVertical()) {
                        if (glyphOrientationAuto) {
                            if (isLatinChar(ch))
                                glyphOrientationAngle = 90;
                            else
                                glyphOrientationAngle = 0;
                        }
                    }


                    while (!pi.isDone()) {
                        type = pi.currentSegment(pts);
                        if ((type == PathIterator.SEG_MOVETO) ||
                            (type == PathIterator.SEG_LINETO)) {
                            // LINETO or MOVETO
                            if (count > 4) break; // too many lines...
                            if (count == 4) {
                                // make sure we are just closing it..
                                if ((firstPt == null)     ||
                                    (firstPt.x != pts[0]) ||
                                    (firstPt.y != pts[1]))
                                    break;
                            } else {
                                Point2D.Float pt;
                                pt = new Point2D.Float(pts[0], pts[1]);
                                if (count == 0) firstPt = pt;
                                // Use sides of  rectangle...
                                switch (count) {
                                case 0: botPts[ptIdx]   = pt; break;
                                case 1: topPts[ptIdx]   = pt; break;
                                case 2: topPts[ptIdx+1] = pt; break;
                                case 3: botPts[ptIdx+1] = pt; break;
                                }
                            }
                        } else if (type == PathIterator.SEG_CLOSE) {
                                // Close in the wrong spot?
                            if ((count < 4) || (count > 5)) break;
                        } else {
                            // QUADTO or CUBETO
                            break;
                        }


                        count++;
                        pi.next();
                    }
                    if (pi.isDone()) {
                        // Sucessfully Expressed as a quadralateral...
                        if ((botPts[ptIdx]!=null) &&
                            ((topPts[ptIdx].x != topPts[ptIdx+1].x) ||
                             (topPts[ptIdx].y != topPts[ptIdx+1].y)))
                            // box isn't empty so use it's points...

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        if (!nativePen) {
            super.draw(s);
            return;
        }


        PathIterator pi = s.getPathIterator(transform, 0.5);
        int len = getPathArray(pi);
        drawShape(gi, pathArray, len, pi.getWindingRule());
    }

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            MultiRectArea mra = jsr.rasterize(s, 0.5);
            super.fillMultiRectAreaPaint(mra);
            return;
        }


        PathIterator pi = s.getPathIterator(transform, 0.5);
        int len = getPathArray(pi);
        fillShape(gi, pathArray, len, pi.getWindingRule());
    }

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    public void draw(Shape s) {
        if (stroke instanceof BasicStroke && ((BasicStroke)stroke).getLineWidth() <= 1) {
            //TODO: Think about drawing the shape in one fillMultiRectArea call
            BasicStroke bstroke = (BasicStroke)stroke;
            JavaLineRasterizer.LineDasher ld = (bstroke.getDashArray() == null)?null:new JavaLineRasterizer.LineDasher(bstroke.getDashArray(), bstroke.getDashPhase());
            PathIterator pi = s.getPathIterator(transform, 0.5);
            float []points = new float[6];
            int x1 = Integer.MIN_VALUE;
            int y1 = Integer.MIN_VALUE;
            int cx1 = Integer.MIN_VALUE;
            int cy1 = Integer.MIN_VALUE;
            while (!pi.isDone()) {
                switch (pi.currentSegment(points)) {
                    case PathIterator.SEG_MOVETO:
                        x1 = (int)Math.floor(points[0]);
                        y1 = (int)Math.floor(points[1]);
                        cx1 = x1;
                        cy1 = y1;
                        break;
                    case PathIterator.SEG_LINETO:
                        int x2 = (int)Math.floor(points[0]);
                        int y2 = (int)Math.floor(points[1]);
                        fillMultiRectArea(JavaLineRasterizer.rasterize(x1, y1, x2, y2, null, ld, false));
                        x1 = x2;
                        y1 = y2;
                        break;
                    case PathIterator.SEG_CLOSE:
                        x2 = cx1;
                        y2 = cy1;
                        fillMultiRectArea(JavaLineRasterizer.rasterize(x1, y1, x2, y2, null, ld, false));
                        x1 = x2;
                        y1 = y2;
                        break;
                }
                pi.next();
            }
        } else {
            s = stroke.createStrokedShape(s);
            s = transform.createTransformedShape(s);
            fillMultiRectArea(jsr.rasterize(s, 0.5));

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