8000 Merge pull request #25112 from gokberkgunes/main · matplotlib/matplotlib@1125888 · GitHub
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Merge pull request #25112 from gokberkgunes/main
2 parents c075ce0 + a448c0c commit 1125888

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‎doc/api/next_api_changes/behavior/25112-GG.rst

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Streamplot now draws streamlines as one piece if no width or no color variance
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Since there is no need to draw streamlines piece by piece if there is no color
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change or width change, now streamplot will draw each streamline in one piece.
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The behavior for varying width or varying color is not changed, same logic is
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used for these kinds of streamplots.

‎lib/matplotlib/streamplot.py

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@@ -198,8 +198,13 @@ def streamplot(axes, x, y, u, v, density=1, linewidth=None, color=None,
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tx += grid.x_origin
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ty += grid.y_origin
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points = np.transpose([tx, ty]).reshape(-1, 1, 2)
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streamlines.extend(np.hstack([points[:-1], points[1:]]))
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# Create multiple tiny segments if varying width or color is given
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if isinstance(linewidth, np.ndarray) or use_multicolor_lines:
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points = np.transpose([tx, ty]).reshape(-1, 1, 2)
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streamlines.extend(np.hstack([points[:-1], points[1:]]))
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else:
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points = np.transpose([tx, ty])
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streamlines.append(points)
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# Add arrows halfway along each trajectory.
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s = np.cumsum(np.hypot(np.diff(tx), np.diff(ty)))

‎lib/matplotlib/tests/baseline_images/test_streamplot/streamplot_direction.png

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‎lib/matplotlib/tests/baseline_images/test_streamplot/streamplot_maxlength.png

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‎lib/matplotlib/tests/baseline_images/test_streamplot/streamplot_maxlength_no_broken.png

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‎lib/matplotlib/tests/baseline_images/test_streamplot/streamplot_startpoints.png

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