def __init__(self, color_scheme, dots, zoom, x, y, fspath):
"""x and y are tile coords per Google Maps.
"""
# Calculate some things.
# ======================
dot = dots[zoom]
# Translate tile to pixel coords.
# -------------------------------
x1 = x * SIZE
x2 = x1 + 255
y1 = y * SIZE
y2 = y1 + 255
# Expand bounds by one-half dot width.
# ------------------------------------
x1 = x1 - dot.half_size
x2 = x2 + dot.half_size
y1 = y1 - dot.half_size
y2 = y2 + dot.half_size
expanded_size = (x2-x1, y2-y1)
# Translate new pixel bounds to lat/lng.
# --------------------------------------
n, w = gmerc.px2ll(x1, y1, zoom)
s, e = gmerc.px2ll(x2, y2, zoom)
# Save
# ====
self.dot = dot.img
self.pad = dot.half_size
self.x = x
self.y = y
self.x1 = x1
self.y1 = y1
self.x2 = x2
self.y2 = y2
self.expanded_size = expanded_size
self.llbound = (n,s,e,w)
self.zoom = zoom
self.fspath = fspath
self.opacity = gheat.opacity.zoom_to_opacity[zoom]
self.color_scheme = color_scheme
def __init__(self, queryset, color_scheme, dots, zoom, x, y, point_field='geometry', last_modified_field=None, density_field=None):
"""
x and y are tile coords per Google Maps.
"""
# Calculate some things.
# ======================
dot = dots[zoom]
# Translate tile to pixel coords.
# -------------------------------
x1 = x * SIZE
x2 = x1 + 255
y1 = y * SIZE
y2 = y1 + 255
# Expand bounds by one-half dot width.
# ------------------------------------
x1 = x1 - dot.half_size
x2 = x2 + dot.half_size
y1 = y1 - dot.half_size
y2 = y2 + dot.half_size
expanded_size = (x2-x1, y2-y1)
# Translate new pixel bounds to lat/lng.
# --------------------------------------
n, w = gmerc.px2ll(x1, y1, zoom)
s, e = gmerc.px2ll(x2, y2, zoom)
# Save
# ====
self.dot = dot.img
self.pad = dot.half_size
self.x = x
self.y = y
self.x1 = x1
self.y1 = y1
self.x2 = x2
self.y2 = y2
self.expanded_size = expanded_size
self.bbox = Polygon.from_bbox((w,s,e,n))
self.zoom = zoom
self.opacity = gheat.opacity.zoom_to_opacity[zoom]
self.color_scheme = color_scheme
self.queryset = queryset
self.point_field = point_field
self.last_modified_field = last_modified_field
self.density_field = density_field
_color_schemes_dir = os.path.join(gheat_settings.GHEAT_CONF_DIR, 'color-schemes')
self.schemeobj = ColorScheme(
self.color_scheme,
os.path.join(_color_schemes_dir, "%s.png" % self.color_scheme)
)
