示例#1
0
  private void updateBounds(MyPoint p) {

    if (bounds == null) {
      bounds = AwtFactory.prototype.newRectangle();
      bounds.setBounds((int) p.getX(), (int) p.getY(), 0, 0);
    }

    if (Math.abs(p.getX()) > largestCoord) largestCoord = Math.abs(p.getX());
    if (Math.abs(p.getY()) > largestCoord) largestCoord = Math.abs(p.getY());

    bounds.add(p.getX(), p.getY());
  }
示例#2
0
  /**
   * Clip all segments at screen to make sure we don't have to render huge coordinates. This is
   * especially important for fill the GeneralPath.
   */
  private void addClippedSegments() {
    geogebra.common.awt.GRectangle viewRect =
        AwtFactory.prototype.newRectangle(0, 0, view.getWidth(), view.getHeight());
    MyPoint curP = null, prevP;

    int size = pathPoints.size();
    for (int i = 0; i < size; i++) {
      prevP = curP;
      curP = pathPoints.get(i);
      if (!curP.getLineTo() || prevP == null) {
        // moveTo point, make sure it is only slightly outside screen
        geogebra.common.awt.GPoint2D p = getPointCloseToScreen(curP.getX(), curP.getY());
        addToGeneralPath(p, false);
      } else {
        // clip line at screen
        addClippedLine(prevP, curP, viewRect);
      }
    }

    if (needClosePath) {
      // line from last point to first point
      addClippedLine(curP, pathPoints.get(0), viewRect);
      gp.closePath();
    }
  }
示例#3
0
  private void addClippedLine(
      MyPoint prevP, MyPoint curP, geogebra.common.awt.GRectangle viewRect) {
    // check if both points on screen
    if (viewRect.contains(prevP) && viewRect.contains(curP)) {
      // draw line to point
      addToGeneralPath(curP, true);
      return;
    }

    // at least one point is not on screen: clip line at screen
    geogebra.common.awt.GPoint2D[] clippedPoints =
        ClipLine.getClipped(
            prevP.getX(),
            prevP.getY(),
            curP.getX(),
            curP.getY(),
            -10,
            view.getWidth() + 10,
            -10,
            view.getHeight() + 10);

    if (clippedPoints != null) {
      // we have two intersection points with the screen
      // get closest clip point to prevP
      int first = 0;
      int second = 1;
      if (clippedPoints[first].distance(prevP.getX(), prevP.getY())
          > clippedPoints[second].distance(prevP.getX(), prevP.getY())) {
        first = 1;
        second = 0;
      }

      // draw line to first clip point
      addToGeneralPath(clippedPoints[first], true);
      // draw line between clip points: this ensures high quality
      // rendering
      // which Java2D doesn't deliver with the regular float GeneralPath
      // and huge coords
      addToGeneralPath(clippedPoints[second], true);

      // draw line to end point if not already there
      addToGeneralPath(getPointCloseToScreen(curP.getX(), curP.getY()), true);
    } else {
      // line is off screen
      // draw line to off screen end point
      addToGeneralPath(getPointCloseToScreen(curP.getX(), curP.getY()), true);
    }
  }