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Account for fractions of a pixel when drawing #45

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Merged
merged 1 commit into from
Dec 5, 2024
Merged

Account for fractions of a pixel when drawing #45

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12 changes: 6 additions & 6 deletions adafruit_turtle.py
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Original file line number Diff line number Diff line change
Expand Up @@ -407,13 +407,17 @@ def goto(
xn: float = x1[0] if y1 is None else x1 # type: ignore
xn += self._w // 2
yn = self._h // 2 - yn
x0 = self._x
y0 = self._y
if not self.isdown():
self._x = xn # woot, we just skip ahead
self._y = yn
self._drawturtle()
return

self._do_draw_line(round(self._x), round(self._y), round(xn), round(yn))
self._x = xn
self._y = yn

def _do_draw_line(self, x0: int, y0: int, xn: int, yn: int):
steep = abs(yn - y0) > abs(xn - x0)
rev = False
dx = xn - x0
Expand Down Expand Up @@ -444,15 +448,11 @@ def goto(
self._plot(int(y0), int(x0), self._pencolor)
except IndexError:
pass
self._x = y0
self._y = x0
else:
try:
self._plot(int(x0), int(y0), self._pencolor)
except IndexError:
pass
self._x = x0
self._y = y0
if self._speed > 0:
if step >= self._speed:
# mark the step
Expand Down
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