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compare: xan:018c7fdc40d1561f9ad2836ddc9a5bd85d49d13e
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0aedd959f9 ... 018c7fdc40

Author SHA1 Message Date
XANTRONIX Industrial
018c7fdc40 Scale graph to maximum 100 knots plotted 2025-02-26 18:29:33 -05:00
XANTRONIX Industrial
d1921d2d0b Convert wind speed in m/s to knots 2025-02-26 18:25:22 -05:00
1 changed files with 6 additions and 2 deletions
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lib/xmet/hodograph.py
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@ -4,7 +4,7 @@ import cairo
from xmet.igra import IGRAReader from xmet.igra import IGRAReader
from xmet.sounding import Sounding from xmet.sounding import Sounding
WIND_SPEED_MAX = 100 # knots WIND_SPEED_MAX = 140 # knots
WIND_SPEED_MIN = 10 WIND_SPEED_MIN = 10
WIND_SPEED_STEP = 10 WIND_SPEED_STEP = 10
@ -18,6 +18,9 @@ def radians(degrees: float) -> float:
def degrees(radians: float) -> float: def degrees(radians: float) -> float:
return (radians * (180.0 / math.pi)) - 90 return (radians * (180.0 / math.pi)) - 90
def knots(ms: float) -> float:
return ms * 1.944
class Hodograph(): class Hodograph():
def __init__(self, width, height): def __init__(self, width, height):
self.width = min(width, height) self.width = min(width, height)
@ -151,7 +154,8 @@ class Hodograph():
if sx_last is not None and sy_last is not None: if sx_last is not None and sy_last is not None:
cr.move_to(x + sx_last, x + sy_last) cr.move_to(x + sx_last, x + sy_last)
sx, sy = self.sample_to_screen(sample.wind_speed, sample.wind_dir) sx, sy = self.sample_to_screen(knots(sample.wind_speed),
sample.wind_dir)
if first: if first:
cr.move_to(x + sx, y + sy) cr.move_to(x + sx, y + sy)