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compare: xan:f58dd8816f059fb72dd430ae21982c051e669f46
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2 commits
ea38bdaa50 ... f58dd8816f

Author SHA1 Message Date
XANTRONIX Industrial
f58dd8816f Draw direction lines every 30 degrees 2025-03-03 17:51:04 -05:00
XANTRONIX Industrial
8f96849fc4 Render speed legends both N and S 2025-03-03 17:50:43 -05:00
1 changed files with 7 additions and 6 deletions
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lib/xmet/hodograph.py
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@ -8,7 +8,7 @@ WIND_SPEED_MAX = 140 # knots
WIND_SPEED_MIN = 10
WIND_SPEED_STEP = 10
WIND_DIR_STEP = 45 # degrees
WIND_DIR_STEP = 30 # degrees
def radians(degrees: float) -> float:
return (degrees + 90) * (math.pi / 180.0)
@ -108,12 +108,13 @@ class Hodograph():
text = "%dkt" % speed
extents = cr.text_extents(text)
sx, sy = self.sample_to_screen(speed, 180)
for angle in (0, 180):
sx, sy = self.sample_to_screen(speed, angle)
cr.move_to(x + sx + extents.width * 0.25,
y + sy - extents.height * 1.5)
cr.show_text(text)
cr.stroke()
cr.move_to(x + sx + extents.width * 0.25,
y + sy - extents.height * 1.5)
cr.show_text(text)
cr.stroke()
cr.restore()