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simplify opengl stroke creation

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Laura Klünder 2017-11-07 12:03:18 +01:00
parent ee0e5a5f0a
commit 2d7cc52941
1 changed files with 5 additions and 11 deletions
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16
src/c3nav/mapdata/render/engines/opengl.py
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@ -6,7 +6,7 @@ from typing import Optional, Union
import ModernGL
import numpy as np
from PIL import Image
from shapely.geometry import CAP_STYLE, JOIN_STYLE, LinearRing, LineString, MultiLineString, MultiPolygon, Polygon
from shapely.geometry import CAP_STYLE, JOIN_STYLE, MultiPolygon, Polygon
from shapely.ops import unary_union
from trimesh.creation import triangulate_polygon
@ -81,16 +81,10 @@ class OpenGLEngine(RenderEngine):
self.vertices.append(self._create_geometry(geometry, self.hex_to_rgb(fill.color)))
if stroke is not None and stroke.color.startswith('#'):
if isinstance(geometry, MultiLineString):
lines = (geometry, )
elif isinstance(geometry, (LinearRing, LineString)):
lines = (geometry, )
elif isinstance(geometry, (Polygon, MultiPolygon)):
lines = tuple(chain(*((polygon.exterior, *polygon.interiors)
for polygon in assert_multipolygon(geometry))))
else:
raise ValueError('Unknown geometry for add_geometry!')
lines = tuple(chain(*(
((geom.exterior, *geom.interiors) if isinstance(geom, Polygon) else geom)
for geom in getattr(geometry, 'geoms', (geometry, ))
)))
self.vertices.append(self._create_geometry(
unary_union(lines).buffer(max(stroke.width, (stroke.min_px or 0) / self.scale)/2,
cap_style=CAP_STYLE.flat, join_style=JOIN_STYLE.mitre),