5b58ab5c45be8923e5d74e3bc84101be1ad13066,Orange/widgets/unsupervised/owmds.py,OWMDS,_setup_plot,#OWMDS#,749

Before Change

                self._similar_pairs = fpairs = numpy.empty(2 * p, dtype=int)
                fpairs[::2] = indcs[0][sorted]
                fpairs[1::2] = indcs[1][sorted]
            for i in range(int(len(emb_x[self._similar_pairs]) / 2)):
                item = QGraphicsLineItem(
                    emb_x[self._similar_pairs][i * 2],
                    emb_y[self._similar_pairs][i * 2],
                    emb_x[self._similar_pairs][i * 2 + 1],
                    emb_y[self._similar_pairs][i * 2 + 1]
                )
                if item.line().isNull():
                    // Null (zero length) line causes bad rendering artifacts
                    // in Qt when using the raster graphics system
                    // (see gh-issue: 1668).
                    continue
                pen = QPen(QBrush(QColor(204, 204, 204)), 2)
                pen.setCosmetic(True)
                item.setPen(pen)
                self.plot.addItem(item)

        data = numpy.arange(size)
        self._scatter_item = item = ScatterPlotItem(
            x=emb_x, y=emb_y,
            pen=self._pen_data, brush=self._brush_data, symbol=self._shape_data,

After Change

                self._similar_pairs = fpairs = numpy.empty(2 * p, dtype=int)
                fpairs[::2] = indcs[0][sorted]
                fpairs[1::2] = indcs[1][sorted]
            emb_x_pairs = emb_x[self._similar_pairs].reshape((-1, 2))
            emb_y_pairs = emb_y[self._similar_pairs].reshape((-1, 2))

            // Filter out zero distance lines (in embedding coords).
            // Null (zero length) line causes bad rendering artifacts
            // in Qt when using the raster graphics system (see gh-issue: 1668).
            (x1, x2), (y1, y2) = (emb_x_pairs.T, emb_y_pairs.T)
            pairs_mask = ~(numpy.isclose(x1, x2) & numpy.isclose(y1, y2))
            emb_x_pairs = emb_x_pairs[pairs_mask, :]
            emb_y_pairs = emb_y_pairs[pairs_mask, :]

            curve = pg.PlotCurveItem(
                emb_x_pairs.ravel(), emb_y_pairs.ravel(),
                pen=pg.mkPen(0.8, width=2, cosmetic=True),
                connect="pairs", antialias=True)
            self.plot.addItem(curve)

        data = numpy.arange(size)
        self._scatter_item = item = ScatterPlotItem(

Instances