def intersections(self, p1, p2):
result = []
# Manually include the wrap-around, so we get all segments.
for (p3, p4) in utils.list_pairs( self.pts + [self.pts[0]] ):
isec = _point_intersect(p1,p2,p3,p4)
if isec is not None:
# Exclude intersections resulting from end-point adjacency.
if isec!=p1 and isec!=p2:
result.append(isec)
return result
def intersections(self, p1, p2):
result = []
# Manually include the wrap-around, so we get all segments.
for (p3, p4) in utils.list_pairs(self.pts + [self.pts[0]]):
isec = _point_intersect(p1, p2, p3, p4)
if isec is not None:
# Exclude intersections resulting from end-point adjacency.
if isec != p1 and isec != p2:
result.append(isec)
return result
def draw_contourmap(self, gfxwindow, device):
# If the drawing failed, then contour_max won't have been set
# yet.
self.lock.acquire()
try:
if self.contour_max is not None:
if config.dimension() == 2:
aspect_ratio = gfxwindow.settings.aspectratio
height = self.contour_max - self.contour_min
width = height/aspect_ratio
device.comment("Colorbar minimum: %s" % self.contour_min)
device.comment("Colorbar maximum: %s" % self.contour_max)
device.set_colormap(self.colormap)
for low, high in utils.list_pairs(self.contour_levels):
# Subtract "contour_min" off the y coords, so that
# the drawn object will include the point (0,0) --
# otherwise, the canvas bounds are wrong.
r_low = low-self.contour_min
r_high = high-self.contour_min
rect_bndy = map( lambda x: primitives.Point(x[0],x[1]),
[ (0.0, r_low), (0.0, r_high),
(width, r_high), (width, r_low) ] )
rectangle = primitives.Polygon(rect_bndy)
# In the collapsed case, height can be zero. This is
# not hugely informative, but should be handled without
# crashing.
if height>0.0:
device.set_fillColor(r_low/height)
else:
device.set_fillColor(0.0)
device.fill_polygon(rectangle)
elif config.dimension() == 3:
if self.lookuptable:
device.draw_scalarbar(self.lookuptable)
finally:
self.lock.release()
def draw_contourmap(self, gfxwindow, device):
# If the drawing failed, then contour_max won't have been set
# yet.
self.lock.acquire()
try:
if self.contour_max is not None:
if config.dimension() == 2:
aspect_ratio = gfxwindow.settings.aspectratio
height = self.contour_max - self.contour_min
width = height / aspect_ratio
device.comment("Colorbar minimum: %s" % self.contour_min)
device.comment("Colorbar maximum: %s" % self.contour_max)
device.set_colormap(self.colormap)
for low, high in utils.list_pairs(self.contour_levels):
# Subtract "contour_min" off the y coords, so that
# the drawn object will include the point (0,0) --
# otherwise, the canvas bounds are wrong.
r_low = low - self.contour_min
r_high = high - self.contour_min
rect_bndy = map(lambda x: primitives.Point(x[0], x[1]),
[(0.0, r_low), (0.0, r_high),
(width, r_high), (width, r_low)])
rectangle = primitives.Polygon(rect_bndy)
# In the collapsed case, height can be zero. This is
# not hugely informative, but should be handled without
# crashing.
if height > 0.0:
device.set_fillColor(r_low / height)
else:
device.set_fillColor(0.0)
device.fill_polygon(rectangle)
elif config.dimension() == 3:
if self.lookuptable:
device.draw_scalarbar(self.lookuptable)
finally:
self.lock.release()
