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| from __future__ import annotations | |
| from typing import TYPE_CHECKING, cast | |
| import matplotlib.path as mpath | |
| import numpy as np | |
| from contourpy import FillType, LineType | |
| from contourpy.array import codes_from_offsets | |
| if TYPE_CHECKING: | |
| from contourpy._contourpy import FillReturn, LineReturn, LineReturn_Separate | |
| def filled_to_mpl_paths(filled: FillReturn, fill_type: FillType) -> list[mpath.Path]: | |
| if fill_type in (FillType.OuterCode, FillType.ChunkCombinedCode): | |
| paths = [mpath.Path(points, codes) for points, codes in zip(*filled) if points is not None] | |
| elif fill_type in (FillType.OuterOffset, FillType.ChunkCombinedOffset): | |
| paths = [mpath.Path(points, codes_from_offsets(offsets)) | |
| for points, offsets in zip(*filled) if points is not None] | |
| elif fill_type == FillType.ChunkCombinedCodeOffset: | |
| paths = [] | |
| for points, codes, outer_offsets in zip(*filled): | |
| if points is None: | |
| continue | |
| points = np.split(points, outer_offsets[1:-1]) | |
| codes = np.split(codes, outer_offsets[1:-1]) | |
| paths += [mpath.Path(p, c) for p, c in zip(points, codes)] | |
| elif fill_type == FillType.ChunkCombinedOffsetOffset: | |
| paths = [] | |
| for points, offsets, outer_offsets in zip(*filled): | |
| if points is None: | |
| continue | |
| for i in range(len(outer_offsets)-1): | |
| offs = offsets[outer_offsets[i]:outer_offsets[i+1]+1] | |
| pts = points[offs[0]:offs[-1]] | |
| paths += [mpath.Path(pts, codes_from_offsets(offs - offs[0]))] | |
| else: | |
| raise RuntimeError(f"Conversion of FillType {fill_type} to MPL Paths is not implemented") | |
| return paths | |
| def lines_to_mpl_paths(lines: LineReturn, line_type: LineType) -> list[mpath.Path]: | |
| if line_type == LineType.Separate: | |
| if TYPE_CHECKING: | |
| lines = cast(LineReturn_Separate, lines) | |
| paths = [] | |
| for line in lines: | |
| # Drawing as Paths so that they can be closed correctly. | |
| closed = line[0, 0] == line[-1, 0] and line[0, 1] == line[-1, 1] | |
| paths.append(mpath.Path(line, closed=closed)) | |
| elif line_type in (LineType.SeparateCode, LineType.ChunkCombinedCode): | |
| paths = [mpath.Path(points, codes) for points, codes in zip(*lines) if points is not None] | |
| elif line_type == LineType.ChunkCombinedOffset: | |
| paths = [] | |
| for points, offsets in zip(*lines): | |
| if points is None: | |
| continue | |
| for i in range(len(offsets)-1): | |
| line = points[offsets[i]:offsets[i+1]] | |
| closed = line[0, 0] == line[-1, 0] and line[0, 1] == line[-1, 1] | |
| paths.append(mpath.Path(line, closed=closed)) | |
| elif line_type == LineType.ChunkCombinedNan: | |
| paths = [] | |
| for points in lines[0]: | |
| if points is None: | |
| continue | |
| nan_offsets = np.nonzero(np.isnan(points[:, 0]))[0] | |
| nan_offsets = np.concatenate([[-1], nan_offsets, [len(points)]]) | |
| for s, e in zip(nan_offsets[:-1], nan_offsets[1:]): | |
| line = points[s+1:e] | |
| closed = line[0, 0] == line[-1, 0] and line[0, 1] == line[-1, 1] | |
| paths.append(mpath.Path(line, closed=closed)) | |
| else: | |
| raise RuntimeError(f"Conversion of LineType {line_type} to MPL Paths is not implemented") | |
| return paths | |