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Issue #76: add gradient for craters.

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This commit is contained in:
Sergey Vartanov 2021-09-02 01:51:41 +03:00
parent c88616fa68
commit a92d59a21e
1 changed files with 15 additions and 3 deletions
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18
roentgen/figure.py
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@ -264,12 +264,24 @@ class Crater(Tagged):
scale: float = flinger.get_scale(self.coordinates) scale: float = flinger.get_scale(self.coordinates)
assert "diameter" in self.tags assert "diameter" in self.tags
radius: float = float(self.tags["diameter"]) / 2.0 radius: float = float(self.tags["diameter"]) / 2.0
radial_gradient = svg.radialGradient(
center=self.point + np.array((0, radius * scale / 7)),
r=radius * scale,
gradientUnits="userSpaceOnUse",
)
color: Color = Color("#000000")
gradient = svg.defs.add(radial_gradient)
(
gradient
.add_stop_color(0, color.hex, opacity=0)
.add_stop_color(0.7, color.hex, opacity=0)
.add_stop_color(1, color.hex, opacity=1)
) # fmt: skip
circle = svg.circle( circle = svg.circle(
self.point, self.point,
radius * scale, radius * scale,
fill="none", fill=gradient.get_paint_server(),
stroke="#000000", opacity=0.2,
opacity=0.3,
) )
svg.add(circle) svg.add(circle)