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openscad export: implement low_clip and call it for the lowest level

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Laura Klünder 2017-08-07 15:10:34 +02:00
parent 7579c5f188
commit 1a779fbcc4
1 changed files with 25 additions and 8 deletions
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27
src/c3nav/mapdata/models/level.py
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@ -193,7 +193,7 @@ class Level(SpecificLocation, models.Model):
return cascaded_union(tuple(item.geometry.buffer(0) return cascaded_union(tuple(item.geometry.buffer(0)
for item in chain(self.altitudeareas.all(), self.buildings.all()))).bounds for item in chain(self.altitudeareas.all(), self.buildings.all()))).bounds
def _render_scad(self, f, low_clip=[], spaces=None, request=None): def _render_scad(self, f, low_clip=(), spaces=None, request=None):
if spaces is None: if spaces is None:
from c3nav.mapdata.models import Area, Space from c3nav.mapdata.models import Area, Space
spaces = self.spaces.filter(Space.q_for_request(request, allow_none=True)).prefetch_related( spaces = self.spaces.filter(Space.q_for_request(request, allow_none=True)).prefetch_related(
@ -203,8 +203,20 @@ class Level(SpecificLocation, models.Model):
) )
for area in self.altitudeareas.all(): for area in self.altitudeareas.all():
geometry = area.geometry
for low_altitude, low_area in low_clip:
intersection = geometry.intersection(low_area)
if not intersection.is_empty:
geometry = geometry.difference(intersection)
width = max(area.altitude - low_altitude, 0)
if width:
f.write(' ') f.write(' ')
f.write('translate([0, 0, %.2f]) ' % (area.altitude-Decimal('0.5'))) f.write('translate([0, 0, %.2f]) ' % (area.altitude - width))
f.write('linear_extrude(height=%.2f, center=false, convexity=20) ' % width)
f.write(polygon_scad(area.geometry) + ';\n')
if not geometry.is_empty:
f.write(' ')
f.write('translate([0, 0, %.2f]) ' % (area.altitude - Decimal('0.5')))
f.write('linear_extrude(height=0.5, center=false, convexity=20) ') f.write('linear_extrude(height=0.5, center=false, convexity=20) ')
f.write(polygon_scad(area.geometry) + ';\n') f.write(polygon_scad(area.geometry) + ';\n')
@ -223,14 +235,19 @@ class Level(SpecificLocation, models.Model):
if levels is None: if levels is None:
levels = Level.objects levels = Level.objects
levels = levels.prefetch_related('buildings', 'doors', 'altitudeareas') levels = levels.prefetch_related('buildings', 'doors', 'altitudeareas').order_by('base_altitude')
bounds = cascaded_union(tuple(box(*level.bounds) for level in levels)).bounds bounds = cascaded_union(tuple(box(*level.bounds) for level in levels)).bounds
center = tuple(box(*bounds).centroid.coords[0]) center = tuple(box(*bounds).centroid.coords[0])
min_altitude = min((level.min_altitude for level in levels), default=0) min_altitude = min((level.min_altitude for level in levels), default=0)
with open(filename, 'w') as f: with open(filename, 'w') as f:
f.write('translate([%.2f, %.2f, %.2f]) {\n' % (0-center[0], 0-center[1], 0-min_altitude)) f.write('translate([%.2f, %.2f, %.2f]) {\n' % (0-center[0], 0-center[1], 0-min_altitude+Decimal('0.5')))
first = True
for level in levels: for level in levels:
level._render_scad(f, spaces=level_spaces.get(level.pk, [])) low_clip = []
if first:
low_clip = [(level.min_altitude-Decimal('0.5'), box(*bounds))]
first = False
level._render_scad(f, spaces=level_spaces.get(level.pk, []), low_clip=low_clip)
f.write('}\n') f.write('}\n')