diff options
| -rw-r--r-- | wasp/draw565.py | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/wasp/draw565.py b/wasp/draw565.py index 26e7aef..92d39f6 100644 --- a/wasp/draw565.py +++ b/wasp/draw565.py @@ -7,6 +7,7 @@ import array import fonts.sans24 +import math import micropython @micropython.viper @@ -411,4 +412,36 @@ class Draw565(object): err += dx; y0 += sy; + def polar(self, x, y, theta, r0, r1, width=1, color=None): + """Draw a line using polar coordinates. + The coordinate system is tuned for clock applications so it + adopts navigational conventions rather than mathematical ones. + Specifically the reference direction is drawn vertically + upwards and the angle is measures clockwise in degrees. + + Example: + + .. code-block:: python + + draw = wasp.watch.drawable + draw.line(360 / 12, 16, 64) + + :param theta: Angle, in degrees + :param r0: Radius of the start of the line + :param y0: Radius of the end of the line + :param x: X coordinate of the origin + :param y: Y coordinate of the origin + :param width: Width of the line in pixels + :param color: Colour to draw line in, defaults to the foreground colour + """ + to_radians = math.pi / 180 + xdelta = math.sin(theta * to_radians) + ydelta = math.cos(theta * to_radians) + + x0 = x + int(xdelta * r0) + x1 = x + int(xdelta * r1) + y0 = y - int(ydelta * r0) + y1 = y - int(ydelta * r1) + + self.line(x0, y0, x1, y1, width, color) |